/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.1.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 08:06:37,547 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 08:06:37,550 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 08:06:37,587 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 08:06:37,588 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 08:06:37,589 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 08:06:37,591 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 08:06:37,594 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 08:06:37,596 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 08:06:37,597 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 08:06:37,598 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 08:06:37,600 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 08:06:37,600 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 08:06:37,601 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 08:06:37,602 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 08:06:37,604 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 08:06:37,605 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 08:06:37,616 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 08:06:37,619 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 08:06:37,621 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 08:06:37,623 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 08:06:37,625 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 08:06:37,627 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 08:06:37,628 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 08:06:37,635 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 08:06:37,639 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 08:06:37,640 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 08:06:37,641 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 08:06:37,642 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 08:06:37,643 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 08:06:37,643 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 08:06:37,644 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 08:06:37,645 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 08:06:37,645 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 08:06:37,646 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 08:06:37,647 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 08:06:37,653 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 08:06:37,692 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 08:06:37,695 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 08:06:37,697 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 08:06:37,697 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 08:06:37,697 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 08:06:37,698 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 08:06:37,698 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 08:06:37,698 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 08:06:37,699 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 08:06:37,699 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 08:06:37,699 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 08:06:37,699 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 08:06:37,700 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 08:06:37,702 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 08:06:37,702 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 08:06:37,702 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 08:06:37,703 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 08:06:37,703 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 08:06:37,704 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 08:06:37,704 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 08:06:37,704 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 08:06:37,704 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 08:06:37,704 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 08:06:37,705 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 08:06:37,705 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 08:06:37,705 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 08:06:38,085 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 08:06:38,117 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 08:06:38,121 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 08:06:38,123 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 08:06:38,123 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 08:06:38,124 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.1.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c [2020-12-22 08:06:38,223 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/162bd2bcf/64b4c8dcf8ec427987e37fd673804854/FLAGe78a67301 [2020-12-22 08:06:38,918 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 08:06:38,918 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.1.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c [2020-12-22 08:06:38,943 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/162bd2bcf/64b4c8dcf8ec427987e37fd673804854/FLAGe78a67301 [2020-12-22 08:06:39,161 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/162bd2bcf/64b4c8dcf8ec427987e37fd673804854 [2020-12-22 08:06:39,165 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 08:06:39,168 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 08:06:39,172 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 08:06:39,172 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 08:06:39,176 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 08:06:39,177 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 08:06:39" (1/1) ... [2020-12-22 08:06:39,180 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@e11eeaf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:06:39, skipping insertion in model container [2020-12-22 08:06:39,180 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 08:06:39" (1/1) ... [2020-12-22 08:06:39,195 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 08:06:39,280 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 08:06:39,589 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.1.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c[12094,12107] [2020-12-22 08:06:39,687 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 08:06:39,721 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 08:06:39,834 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.1.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c[12094,12107] [2020-12-22 08:06:39,924 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 08:06:39,947 INFO L208 MainTranslator]: Completed translation [2020-12-22 08:06:39,948 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:06:39 WrapperNode [2020-12-22 08:06:39,948 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 08:06:39,954 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 08:06:39,954 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 08:06:39,954 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 08:06:39,972 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:06:39" (1/1) ... [2020-12-22 08:06:40,013 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:06:39" (1/1) ... [2020-12-22 08:06:40,126 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 08:06:40,127 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 08:06:40,127 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 08:06:40,127 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 08:06:40,139 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:06:39" (1/1) ... [2020-12-22 08:06:40,140 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:06:39" (1/1) ... [2020-12-22 08:06:40,156 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:06:39" (1/1) ... [2020-12-22 08:06:40,156 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:06:39" (1/1) ... [2020-12-22 08:06:40,193 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:06:39" (1/1) ... [2020-12-22 08:06:40,222 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:06:39" (1/1) ... [2020-12-22 08:06:40,230 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:06:39" (1/1) ... [2020-12-22 08:06:40,251 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 08:06:40,252 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 08:06:40,252 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 08:06:40,253 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 08:06:40,253 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:06:39" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 08:06:40,349 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 08:06:40,350 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 08:06:40,350 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 08:06:40,350 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 08:06:41,978 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 08:06:41,978 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2020-12-22 08:06:41,980 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 08:06:41 BoogieIcfgContainer [2020-12-22 08:06:41,981 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 08:06:41,982 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 08:06:41,983 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 08:06:41,986 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 08:06:41,986 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 08:06:39" (1/3) ... [2020-12-22 08:06:41,987 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6da06697 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 08:06:41, skipping insertion in model container [2020-12-22 08:06:41,987 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:06:39" (2/3) ... [2020-12-22 08:06:41,988 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6da06697 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 08:06:41, skipping insertion in model container [2020-12-22 08:06:41,988 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 08:06:41" (3/3) ... [2020-12-22 08:06:41,990 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_floodmax.4.1.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c [2020-12-22 08:06:41,996 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 08:06:42,002 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 08:06:42,021 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 08:06:42,051 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 08:06:42,051 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 08:06:42,051 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 08:06:42,051 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 08:06:42,051 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 08:06:42,051 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 08:06:42,052 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 08:06:42,052 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 08:06:42,074 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states. [2020-12-22 08:06:42,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-12-22 08:06:42,089 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:06:42,090 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] [2020-12-22 08:06:42,090 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:06:42,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:06:42,097 INFO L82 PathProgramCache]: Analyzing trace with hash 103029560, now seen corresponding path program 1 times [2020-12-22 08:06:42,107 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:06:42,108 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086165223] [2020-12-22 08:06:42,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:06:42,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:06:42,595 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:06:42,596 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086165223] [2020-12-22 08:06:42,596 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:06:42,597 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:06:42,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19669642] [2020-12-22 08:06:42,605 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:06:42,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:06:42,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:06:42,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:06:42,627 INFO L87 Difference]: Start difference. First operand 307 states. Second operand 3 states. [2020-12-22 08:06:42,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:06:42,826 INFO L93 Difference]: Finished difference Result 556 states and 967 transitions. [2020-12-22 08:06:42,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:06:42,828 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 99 [2020-12-22 08:06:42,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:06:42,846 INFO L225 Difference]: With dead ends: 556 [2020-12-22 08:06:42,847 INFO L226 Difference]: Without dead ends: 420 [2020-12-22 08:06:42,851 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:06:42,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 420 states. [2020-12-22 08:06:42,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 420 to 418. [2020-12-22 08:06:42,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 418 states. [2020-12-22 08:06:42,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 418 states to 418 states and 702 transitions. [2020-12-22 08:06:42,932 INFO L78 Accepts]: Start accepts. Automaton has 418 states and 702 transitions. Word has length 99 [2020-12-22 08:06:42,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:06:42,938 INFO L481 AbstractCegarLoop]: Abstraction has 418 states and 702 transitions. [2020-12-22 08:06:42,939 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:06:42,939 INFO L276 IsEmpty]: Start isEmpty. Operand 418 states and 702 transitions. [2020-12-22 08:06:42,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-12-22 08:06:42,947 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:06:42,948 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] [2020-12-22 08:06:42,948 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 08:06:42,948 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:06:42,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:06:42,952 INFO L82 PathProgramCache]: Analyzing trace with hash 1521112466, now seen corresponding path program 1 times [2020-12-22 08:06:42,952 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:06:42,953 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243497812] [2020-12-22 08:06:42,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:06:43,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:06:43,232 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:06:43,233 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243497812] [2020-12-22 08:06:43,233 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:06:43,233 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:06:43,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886549174] [2020-12-22 08:06:43,235 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:06:43,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:06:43,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:06:43,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:06:43,237 INFO L87 Difference]: Start difference. First operand 418 states and 702 transitions. Second operand 3 states. [2020-12-22 08:06:43,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:06:43,299 INFO L93 Difference]: Finished difference Result 882 states and 1478 transitions. [2020-12-22 08:06:43,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:06:43,300 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 102 [2020-12-22 08:06:43,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:06:43,305 INFO L225 Difference]: With dead ends: 882 [2020-12-22 08:06:43,305 INFO L226 Difference]: Without dead ends: 641 [2020-12-22 08:06:43,308 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:06:43,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 641 states. [2020-12-22 08:06:43,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 641 to 639. [2020-12-22 08:06:43,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 639 states. [2020-12-22 08:06:43,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 639 states to 639 states and 1070 transitions. [2020-12-22 08:06:43,359 INFO L78 Accepts]: Start accepts. Automaton has 639 states and 1070 transitions. Word has length 102 [2020-12-22 08:06:43,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:06:43,362 INFO L481 AbstractCegarLoop]: Abstraction has 639 states and 1070 transitions. [2020-12-22 08:06:43,362 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:06:43,362 INFO L276 IsEmpty]: Start isEmpty. Operand 639 states and 1070 transitions. [2020-12-22 08:06:43,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-12-22 08:06:43,367 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:06:43,367 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] [2020-12-22 08:06:43,367 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 08:06:43,368 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:06:43,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:06:43,371 INFO L82 PathProgramCache]: Analyzing trace with hash -2035930850, now seen corresponding path program 1 times [2020-12-22 08:06:43,372 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:06:43,372 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473440503] [2020-12-22 08:06:43,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:06:43,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:06:43,525 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:06:43,526 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473440503] [2020-12-22 08:06:43,526 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:06:43,526 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:06:43,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110128572] [2020-12-22 08:06:43,529 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:06:43,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:06:43,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:06:43,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:06:43,535 INFO L87 Difference]: Start difference. First operand 639 states and 1070 transitions. Second operand 3 states. [2020-12-22 08:06:43,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:06:43,628 INFO L93 Difference]: Finished difference Result 1527 states and 2548 transitions. [2020-12-22 08:06:43,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:06:43,629 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 105 [2020-12-22 08:06:43,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:06:43,635 INFO L225 Difference]: With dead ends: 1527 [2020-12-22 08:06:43,636 INFO L226 Difference]: Without dead ends: 1065 [2020-12-22 08:06:43,638 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:06:43,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1065 states. [2020-12-22 08:06:43,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1065 to 1063. [2020-12-22 08:06:43,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1063 states. [2020-12-22 08:06:43,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1063 states to 1063 states and 1770 transitions. [2020-12-22 08:06:43,705 INFO L78 Accepts]: Start accepts. Automaton has 1063 states and 1770 transitions. Word has length 105 [2020-12-22 08:06:43,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:06:43,714 INFO L481 AbstractCegarLoop]: Abstraction has 1063 states and 1770 transitions. [2020-12-22 08:06:43,715 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:06:43,715 INFO L276 IsEmpty]: Start isEmpty. Operand 1063 states and 1770 transitions. [2020-12-22 08:06:43,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-12-22 08:06:43,719 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:06:43,720 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] [2020-12-22 08:06:43,720 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 08:06:43,720 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:06:43,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:06:43,722 INFO L82 PathProgramCache]: Analyzing trace with hash 467943166, now seen corresponding path program 1 times [2020-12-22 08:06:43,722 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:06:43,722 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975293081] [2020-12-22 08:06:43,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:06:43,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:06:43,962 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:06:43,963 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975293081] [2020-12-22 08:06:43,963 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:06:43,964 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:06:43,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242568093] [2020-12-22 08:06:43,966 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:06:43,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:06:43,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:06:43,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:06:43,969 INFO L87 Difference]: Start difference. First operand 1063 states and 1770 transitions. Second operand 3 states. [2020-12-22 08:06:44,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:06:44,076 INFO L93 Difference]: Finished difference Result 1969 states and 3284 transitions. [2020-12-22 08:06:44,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:06:44,077 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 108 [2020-12-22 08:06:44,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:06:44,087 INFO L225 Difference]: With dead ends: 1969 [2020-12-22 08:06:44,087 INFO L226 Difference]: Without dead ends: 1507 [2020-12-22 08:06:44,089 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:06:44,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1507 states. [2020-12-22 08:06:44,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1507 to 1505. [2020-12-22 08:06:44,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1505 states. [2020-12-22 08:06:44,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1505 states to 1505 states and 2502 transitions. [2020-12-22 08:06:44,163 INFO L78 Accepts]: Start accepts. Automaton has 1505 states and 2502 transitions. Word has length 108 [2020-12-22 08:06:44,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:06:44,164 INFO L481 AbstractCegarLoop]: Abstraction has 1505 states and 2502 transitions. [2020-12-22 08:06:44,164 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:06:44,164 INFO L276 IsEmpty]: Start isEmpty. Operand 1505 states and 2502 transitions. [2020-12-22 08:06:44,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-12-22 08:06:44,166 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:06:44,167 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] [2020-12-22 08:06:44,167 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 08:06:44,167 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:06:44,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:06:44,168 INFO L82 PathProgramCache]: Analyzing trace with hash -315451476, now seen corresponding path program 1 times [2020-12-22 08:06:44,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:06:44,169 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47318340] [2020-12-22 08:06:44,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:06:44,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:06:44,344 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:06:44,345 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47318340] [2020-12-22 08:06:44,345 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:06:44,345 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:06:44,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349854747] [2020-12-22 08:06:44,346 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:06:44,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:06:44,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:06:44,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:06:44,348 INFO L87 Difference]: Start difference. First operand 1505 states and 2502 transitions. Second operand 3 states. [2020-12-22 08:06:44,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:06:44,500 INFO L93 Difference]: Finished difference Result 3881 states and 6428 transitions. [2020-12-22 08:06:44,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:06:44,503 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 108 [2020-12-22 08:06:44,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:06:44,518 INFO L225 Difference]: With dead ends: 3881 [2020-12-22 08:06:44,519 INFO L226 Difference]: Without dead ends: 2639 [2020-12-22 08:06:44,522 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:06:44,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2639 states. [2020-12-22 08:06:44,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2639 to 2637. [2020-12-22 08:06:44,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2637 states. [2020-12-22 08:06:44,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2637 states to 2637 states and 4350 transitions. [2020-12-22 08:06:44,649 INFO L78 Accepts]: Start accepts. Automaton has 2637 states and 4350 transitions. Word has length 108 [2020-12-22 08:06:44,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:06:44,649 INFO L481 AbstractCegarLoop]: Abstraction has 2637 states and 4350 transitions. [2020-12-22 08:06:44,649 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:06:44,649 INFO L276 IsEmpty]: Start isEmpty. Operand 2637 states and 4350 transitions. [2020-12-22 08:06:44,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-12-22 08:06:44,651 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:06:44,652 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:06:44,652 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 08:06:44,652 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:06:44,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:06:44,653 INFO L82 PathProgramCache]: Analyzing trace with hash 933596114, now seen corresponding path program 1 times [2020-12-22 08:06:44,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:06:44,653 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499335580] [2020-12-22 08:06:44,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:06:44,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:06:44,796 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:06:44,797 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499335580] [2020-12-22 08:06:44,797 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:06:44,798 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:06:44,798 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73012955] [2020-12-22 08:06:44,798 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:06:44,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:06:44,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:06:44,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:06:44,800 INFO L87 Difference]: Start difference. First operand 2637 states and 4350 transitions. Second operand 3 states. [2020-12-22 08:06:45,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:06:45,007 INFO L93 Difference]: Finished difference Result 4881 states and 8064 transitions. [2020-12-22 08:06:45,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:06:45,008 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 111 [2020-12-22 08:06:45,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:06:45,032 INFO L225 Difference]: With dead ends: 4881 [2020-12-22 08:06:45,032 INFO L226 Difference]: Without dead ends: 3639 [2020-12-22 08:06:45,037 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:06:45,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3639 states. [2020-12-22 08:06:45,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3639 to 3637. [2020-12-22 08:06:45,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3637 states. [2020-12-22 08:06:45,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3637 states to 3637 states and 5982 transitions. [2020-12-22 08:06:45,319 INFO L78 Accepts]: Start accepts. Automaton has 3637 states and 5982 transitions. Word has length 111 [2020-12-22 08:06:45,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:06:45,319 INFO L481 AbstractCegarLoop]: Abstraction has 3637 states and 5982 transitions. [2020-12-22 08:06:45,319 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:06:45,320 INFO L276 IsEmpty]: Start isEmpty. Operand 3637 states and 5982 transitions. [2020-12-22 08:06:45,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-12-22 08:06:45,322 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:06:45,322 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:06:45,323 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 08:06:45,323 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:06:45,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:06:45,330 INFO L82 PathProgramCache]: Analyzing trace with hash 1374875396, now seen corresponding path program 1 times [2020-12-22 08:06:45,331 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:06:45,331 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006483875] [2020-12-22 08:06:45,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:06:45,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:06:45,490 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:06:45,491 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006483875] [2020-12-22 08:06:45,491 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:06:45,491 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 08:06:45,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349463723] [2020-12-22 08:06:45,492 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 08:06:45,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:06:45,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 08:06:45,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-12-22 08:06:45,493 INFO L87 Difference]: Start difference. First operand 3637 states and 5982 transitions. Second operand 6 states. [2020-12-22 08:06:47,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:06:47,014 INFO L93 Difference]: Finished difference Result 20391 states and 33849 transitions. [2020-12-22 08:06:47,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 08:06:47,015 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 111 [2020-12-22 08:06:47,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:06:47,132 INFO L225 Difference]: With dead ends: 20391 [2020-12-22 08:06:47,132 INFO L226 Difference]: Without dead ends: 17089 [2020-12-22 08:06:47,143 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-12-22 08:06:47,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17089 states. [2020-12-22 08:06:47,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17089 to 6868. [2020-12-22 08:06:47,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6868 states. [2020-12-22 08:06:47,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6868 states to 6868 states and 11275 transitions. [2020-12-22 08:06:47,886 INFO L78 Accepts]: Start accepts. Automaton has 6868 states and 11275 transitions. Word has length 111 [2020-12-22 08:06:47,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:06:47,886 INFO L481 AbstractCegarLoop]: Abstraction has 6868 states and 11275 transitions. [2020-12-22 08:06:47,886 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 08:06:47,886 INFO L276 IsEmpty]: Start isEmpty. Operand 6868 states and 11275 transitions. [2020-12-22 08:06:47,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-12-22 08:06:47,889 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:06:47,889 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] [2020-12-22 08:06:47,890 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 08:06:47,890 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:06:47,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:06:47,890 INFO L82 PathProgramCache]: Analyzing trace with hash -395597751, now seen corresponding path program 1 times [2020-12-22 08:06:47,890 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:06:47,891 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907461101] [2020-12-22 08:06:47,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:06:47,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:06:47,994 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:06:47,994 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907461101] [2020-12-22 08:06:47,994 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:06:47,994 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 08:06:47,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609081597] [2020-12-22 08:06:47,995 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 08:06:47,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:06:47,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 08:06:47,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 08:06:47,996 INFO L87 Difference]: Start difference. First operand 6868 states and 11275 transitions. Second operand 4 states. [2020-12-22 08:06:49,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:06:49,105 INFO L93 Difference]: Finished difference Result 20225 states and 33450 transitions. [2020-12-22 08:06:49,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 08:06:49,106 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 112 [2020-12-22 08:06:49,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:06:49,144 INFO L225 Difference]: With dead ends: 20225 [2020-12-22 08:06:49,145 INFO L226 Difference]: Without dead ends: 13778 [2020-12-22 08:06:49,158 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:06:49,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13778 states. [2020-12-22 08:06:50,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13778 to 10319. [2020-12-22 08:06:50,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10319 states. [2020-12-22 08:06:50,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10319 states to 10319 states and 16973 transitions. [2020-12-22 08:06:50,040 INFO L78 Accepts]: Start accepts. Automaton has 10319 states and 16973 transitions. Word has length 112 [2020-12-22 08:06:50,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:06:50,041 INFO L481 AbstractCegarLoop]: Abstraction has 10319 states and 16973 transitions. [2020-12-22 08:06:50,041 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 08:06:50,041 INFO L276 IsEmpty]: Start isEmpty. Operand 10319 states and 16973 transitions. [2020-12-22 08:06:50,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-12-22 08:06:50,044 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:06:50,045 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] [2020-12-22 08:06:50,045 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 08:06:50,045 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:06:50,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:06:50,046 INFO L82 PathProgramCache]: Analyzing trace with hash 454247534, now seen corresponding path program 1 times [2020-12-22 08:06:50,046 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:06:50,047 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971029960] [2020-12-22 08:06:50,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:06:50,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:06:50,155 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:06:50,164 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971029960] [2020-12-22 08:06:50,164 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:06:50,164 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:06:50,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999685763] [2020-12-22 08:06:50,166 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:06:50,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:06:50,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:06:50,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:06:50,168 INFO L87 Difference]: Start difference. First operand 10319 states and 16973 transitions. Second operand 3 states. [2020-12-22 08:06:51,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:06:51,125 INFO L93 Difference]: Finished difference Result 19395 states and 32023 transitions. [2020-12-22 08:06:51,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:06:51,126 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 112 [2020-12-22 08:06:51,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:06:51,162 INFO L225 Difference]: With dead ends: 19395 [2020-12-22 08:06:51,163 INFO L226 Difference]: Without dead ends: 14003 [2020-12-22 08:06:51,173 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:06:51,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14003 states. [2020-12-22 08:06:52,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14003 to 14001. [2020-12-22 08:06:52,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14001 states. [2020-12-22 08:06:52,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14001 states to 14001 states and 23013 transitions. [2020-12-22 08:06:52,089 INFO L78 Accepts]: Start accepts. Automaton has 14001 states and 23013 transitions. Word has length 112 [2020-12-22 08:06:52,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:06:52,089 INFO L481 AbstractCegarLoop]: Abstraction has 14001 states and 23013 transitions. [2020-12-22 08:06:52,089 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:06:52,089 INFO L276 IsEmpty]: Start isEmpty. Operand 14001 states and 23013 transitions. [2020-12-22 08:06:52,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-12-22 08:06:52,091 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:06:52,092 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] [2020-12-22 08:06:52,092 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 08:06:52,092 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:06:52,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:06:52,093 INFO L82 PathProgramCache]: Analyzing trace with hash 1896648670, now seen corresponding path program 1 times [2020-12-22 08:06:52,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:06:52,093 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543580589] [2020-12-22 08:06:52,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:06:52,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:06:52,219 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:06:52,220 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543580589] [2020-12-22 08:06:52,220 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:06:52,220 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:06:52,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62332290] [2020-12-22 08:06:52,221 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:06:52,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:06:52,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:06:52,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:06:52,222 INFO L87 Difference]: Start difference. First operand 14001 states and 23013 transitions. Second operand 3 states. [2020-12-22 08:06:53,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:06:53,560 INFO L93 Difference]: Finished difference Result 30414 states and 50389 transitions. [2020-12-22 08:06:53,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:06:53,561 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 112 [2020-12-22 08:06:53,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:06:53,634 INFO L225 Difference]: With dead ends: 30414 [2020-12-22 08:06:53,635 INFO L226 Difference]: Without dead ends: 20721 [2020-12-22 08:06:53,655 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:06:53,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20721 states. [2020-12-22 08:06:55,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20721 to 20719. [2020-12-22 08:06:55,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20719 states. [2020-12-22 08:06:55,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20719 states to 20719 states and 34107 transitions. [2020-12-22 08:06:55,437 INFO L78 Accepts]: Start accepts. Automaton has 20719 states and 34107 transitions. Word has length 112 [2020-12-22 08:06:55,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:06:55,437 INFO L481 AbstractCegarLoop]: Abstraction has 20719 states and 34107 transitions. [2020-12-22 08:06:55,437 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:06:55,437 INFO L276 IsEmpty]: Start isEmpty. Operand 20719 states and 34107 transitions. [2020-12-22 08:06:55,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-12-22 08:06:55,439 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:06:55,439 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] [2020-12-22 08:06:55,439 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 08:06:55,439 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:06:55,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:06:55,440 INFO L82 PathProgramCache]: Analyzing trace with hash 558867563, now seen corresponding path program 1 times [2020-12-22 08:06:55,440 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:06:55,441 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191024561] [2020-12-22 08:06:55,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:06:55,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:06:55,585 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:06:55,585 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191024561] [2020-12-22 08:06:55,585 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:06:55,585 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 08:06:55,586 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58955619] [2020-12-22 08:06:55,586 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 08:06:55,586 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:06:55,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 08:06:55,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 08:06:55,589 INFO L87 Difference]: Start difference. First operand 20719 states and 34107 transitions. Second operand 4 states. [2020-12-22 08:06:58,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:06:58,333 INFO L93 Difference]: Finished difference Result 67897 states and 112023 transitions. [2020-12-22 08:06:58,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 08:06:58,334 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 113 [2020-12-22 08:06:58,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:06:58,473 INFO L225 Difference]: With dead ends: 67897 [2020-12-22 08:06:58,473 INFO L226 Difference]: Without dead ends: 47411 [2020-12-22 08:06:58,516 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 08:06:58,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47411 states. [2020-12-22 08:07:00,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47411 to 33736. [2020-12-22 08:07:00,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33736 states. [2020-12-22 08:07:00,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33736 states to 33736 states and 55377 transitions. [2020-12-22 08:07:00,675 INFO L78 Accepts]: Start accepts. Automaton has 33736 states and 55377 transitions. Word has length 113 [2020-12-22 08:07:00,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:07:00,676 INFO L481 AbstractCegarLoop]: Abstraction has 33736 states and 55377 transitions. [2020-12-22 08:07:00,676 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 08:07:00,676 INFO L276 IsEmpty]: Start isEmpty. Operand 33736 states and 55377 transitions. [2020-12-22 08:07:00,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-12-22 08:07:00,678 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:07:00,678 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:07:00,678 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 08:07:00,678 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:07:00,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:07:00,679 INFO L82 PathProgramCache]: Analyzing trace with hash 87079248, now seen corresponding path program 1 times [2020-12-22 08:07:00,679 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:07:00,680 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569645635] [2020-12-22 08:07:00,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:07:00,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:07:00,796 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:07:00,796 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569645635] [2020-12-22 08:07:00,796 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:07:00,797 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 08:07:00,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627150563] [2020-12-22 08:07:00,797 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 08:07:00,798 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:07:00,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 08:07:00,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 08:07:00,799 INFO L87 Difference]: Start difference. First operand 33736 states and 55377 transitions. Second operand 4 states. [2020-12-22 08:07:04,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:07:04,784 INFO L93 Difference]: Finished difference Result 109311 states and 179862 transitions. [2020-12-22 08:07:04,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 08:07:04,785 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 114 [2020-12-22 08:07:04,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:07:05,006 INFO L225 Difference]: With dead ends: 109311 [2020-12-22 08:07:05,007 INFO L226 Difference]: Without dead ends: 75808 [2020-12-22 08:07:05,089 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:07:05,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75808 states. [2020-12-22 08:07:08,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75808 to 54629. [2020-12-22 08:07:08,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54629 states. [2020-12-22 08:07:08,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54629 states to 54629 states and 89415 transitions. [2020-12-22 08:07:08,895 INFO L78 Accepts]: Start accepts. Automaton has 54629 states and 89415 transitions. Word has length 114 [2020-12-22 08:07:08,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:07:08,895 INFO L481 AbstractCegarLoop]: Abstraction has 54629 states and 89415 transitions. [2020-12-22 08:07:08,895 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 08:07:08,895 INFO L276 IsEmpty]: Start isEmpty. Operand 54629 states and 89415 transitions. [2020-12-22 08:07:08,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-12-22 08:07:08,896 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:07:08,896 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] [2020-12-22 08:07:08,897 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 08:07:08,897 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:07:08,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:07:08,898 INFO L82 PathProgramCache]: Analyzing trace with hash -1648898606, now seen corresponding path program 1 times [2020-12-22 08:07:08,898 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:07:08,898 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203679440] [2020-12-22 08:07:08,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:07:08,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:07:09,015 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:07:09,016 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203679440] [2020-12-22 08:07:09,016 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:07:09,016 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 08:07:09,016 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933243345] [2020-12-22 08:07:09,017 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 08:07:09,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:07:09,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 08:07:09,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 08:07:09,018 INFO L87 Difference]: Start difference. First operand 54629 states and 89415 transitions. Second operand 4 states. [2020-12-22 08:07:15,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:07:15,890 INFO L93 Difference]: Finished difference Result 175037 states and 287174 transitions. [2020-12-22 08:07:15,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 08:07:15,891 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 115 [2020-12-22 08:07:15,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:07:16,167 INFO L225 Difference]: With dead ends: 175037 [2020-12-22 08:07:16,167 INFO L226 Difference]: Without dead ends: 120641 [2020-12-22 08:07:16,444 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:07:16,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120641 states. [2020-12-22 08:07:22,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120641 to 87410. [2020-12-22 08:07:22,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87410 states. [2020-12-22 08:07:22,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87410 states to 87410 states and 142661 transitions. [2020-12-22 08:07:22,301 INFO L78 Accepts]: Start accepts. Automaton has 87410 states and 142661 transitions. Word has length 115 [2020-12-22 08:07:22,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:07:22,301 INFO L481 AbstractCegarLoop]: Abstraction has 87410 states and 142661 transitions. [2020-12-22 08:07:22,301 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 08:07:22,301 INFO L276 IsEmpty]: Start isEmpty. Operand 87410 states and 142661 transitions. [2020-12-22 08:07:22,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-12-22 08:07:22,303 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:07:22,303 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:07:22,303 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 08:07:22,303 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:07:22,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:07:22,304 INFO L82 PathProgramCache]: Analyzing trace with hash -1265934813, now seen corresponding path program 1 times [2020-12-22 08:07:22,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:07:22,304 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847719632] [2020-12-22 08:07:22,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:07:22,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:07:22,546 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:07:22,546 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847719632] [2020-12-22 08:07:22,546 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:07:22,547 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 08:07:22,547 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655633793] [2020-12-22 08:07:22,547 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 08:07:22,547 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:07:22,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 08:07:22,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-22 08:07:22,548 INFO L87 Difference]: Start difference. First operand 87410 states and 142661 transitions. Second operand 6 states. [2020-12-22 08:07:28,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:07:28,595 INFO L93 Difference]: Finished difference Result 174589 states and 284943 transitions. [2020-12-22 08:07:28,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 08:07:28,596 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 117 [2020-12-22 08:07:28,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:07:28,785 INFO L225 Difference]: With dead ends: 174589 [2020-12-22 08:07:28,786 INFO L226 Difference]: Without dead ends: 87412 [2020-12-22 08:07:28,863 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2020-12-22 08:07:28,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87412 states. [2020-12-22 08:07:34,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87412 to 87410. [2020-12-22 08:07:34,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87410 states. [2020-12-22 08:07:34,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87410 states to 87410 states and 142036 transitions. [2020-12-22 08:07:34,488 INFO L78 Accepts]: Start accepts. Automaton has 87410 states and 142036 transitions. Word has length 117 [2020-12-22 08:07:34,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:07:34,488 INFO L481 AbstractCegarLoop]: Abstraction has 87410 states and 142036 transitions. [2020-12-22 08:07:34,488 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 08:07:34,488 INFO L276 IsEmpty]: Start isEmpty. Operand 87410 states and 142036 transitions. [2020-12-22 08:07:34,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2020-12-22 08:07:34,489 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:07:34,489 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:07:34,490 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 08:07:34,490 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:07:34,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:07:34,490 INFO L82 PathProgramCache]: Analyzing trace with hash -1404593150, now seen corresponding path program 1 times [2020-12-22 08:07:34,491 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:07:34,491 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674056455] [2020-12-22 08:07:34,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:07:34,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:07:34,747 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:07:34,747 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674056455] [2020-12-22 08:07:34,747 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:07:34,748 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 08:07:34,748 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306296073] [2020-12-22 08:07:34,748 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 08:07:34,748 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:07:34,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 08:07:34,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-12-22 08:07:34,749 INFO L87 Difference]: Start difference. First operand 87410 states and 142036 transitions. Second operand 6 states. [2020-12-22 08:07:51,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:07:51,061 INFO L93 Difference]: Finished difference Result 328431 states and 534722 transitions. [2020-12-22 08:07:51,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 08:07:51,062 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 120 [2020-12-22 08:07:51,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:07:51,788 INFO L225 Difference]: With dead ends: 328431 [2020-12-22 08:07:51,788 INFO L226 Difference]: Without dead ends: 241254 [2020-12-22 08:07:51,906 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2020-12-22 08:07:52,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241254 states. [2020-12-22 08:08:04,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241254 to 168402. [2020-12-22 08:08:04,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168402 states. [2020-12-22 08:08:05,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168402 states to 168402 states and 272035 transitions. [2020-12-22 08:08:05,627 INFO L78 Accepts]: Start accepts. Automaton has 168402 states and 272035 transitions. Word has length 120 [2020-12-22 08:08:05,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:08:05,628 INFO L481 AbstractCegarLoop]: Abstraction has 168402 states and 272035 transitions. [2020-12-22 08:08:05,628 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 08:08:05,628 INFO L276 IsEmpty]: Start isEmpty. Operand 168402 states and 272035 transitions. [2020-12-22 08:08:05,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-12-22 08:08:05,630 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:08:05,630 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] [2020-12-22 08:08:05,630 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 08:08:05,630 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:08:05,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:08:05,635 INFO L82 PathProgramCache]: Analyzing trace with hash -594623840, now seen corresponding path program 1 times [2020-12-22 08:08:05,635 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:08:05,635 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514535481] [2020-12-22 08:08:05,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:08:05,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:08:05,838 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:08:05,839 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514535481] [2020-12-22 08:08:05,841 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:08:05,842 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 08:08:05,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470251565] [2020-12-22 08:08:05,842 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 08:08:05,842 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:08:05,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 08:08:05,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:08:05,843 INFO L87 Difference]: Start difference. First operand 168402 states and 272035 transitions. Second operand 5 states. [2020-12-22 08:08:30,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:08:30,764 INFO L93 Difference]: Finished difference Result 327623 states and 527076 transitions. [2020-12-22 08:08:30,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 08:08:30,765 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 121 [2020-12-22 08:08:30,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:08:31,654 INFO L225 Difference]: With dead ends: 327623 [2020-12-22 08:08:31,655 INFO L226 Difference]: Without dead ends: 327621 [2020-12-22 08:08:31,750 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-22 08:08:32,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327621 states. [2020-12-22 08:08:47,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327621 to 172470. [2020-12-22 08:08:47,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172470 states. [2020-12-22 08:08:48,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172470 states to 172470 states and 276076 transitions. [2020-12-22 08:08:48,271 INFO L78 Accepts]: Start accepts. Automaton has 172470 states and 276076 transitions. Word has length 121 [2020-12-22 08:08:48,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:08:48,271 INFO L481 AbstractCegarLoop]: Abstraction has 172470 states and 276076 transitions. [2020-12-22 08:08:48,271 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 08:08:48,271 INFO L276 IsEmpty]: Start isEmpty. Operand 172470 states and 276076 transitions. [2020-12-22 08:08:48,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2020-12-22 08:08:48,291 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:08:48,291 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:08:48,291 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 08:08:48,292 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:08:48,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:08:48,292 INFO L82 PathProgramCache]: Analyzing trace with hash -1909326353, now seen corresponding path program 1 times [2020-12-22 08:08:48,292 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:08:48,292 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119140884] [2020-12-22 08:08:48,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:08:48,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:08:48,804 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-12-22 08:08:48,804 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119140884] [2020-12-22 08:08:48,804 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:08:48,805 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 08:08:48,805 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567455874] [2020-12-22 08:08:48,805 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 08:08:48,806 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:08:48,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 08:08:48,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 08:08:48,806 INFO L87 Difference]: Start difference. First operand 172470 states and 276076 transitions. Second operand 6 states. [2020-12-22 08:09:13,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:09:13,701 INFO L93 Difference]: Finished difference Result 359624 states and 578781 transitions. [2020-12-22 08:09:13,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 08:09:13,702 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 151 [2020-12-22 08:09:13,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:09:14,479 INFO L225 Difference]: With dead ends: 359624 [2020-12-22 08:09:14,479 INFO L226 Difference]: Without dead ends: 283822 [2020-12-22 08:09:14,622 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 08:09:14,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283822 states.