/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 08:16:00,569 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 08:16:00,572 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 08:16:00,609 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 08:16:00,610 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 08:16:00,611 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 08:16:00,613 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 08:16:00,615 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 08:16:00,617 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 08:16:00,619 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 08:16:00,620 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 08:16:00,621 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 08:16:00,622 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 08:16:00,623 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 08:16:00,624 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 08:16:00,626 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 08:16:00,627 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 08:16:00,628 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 08:16:00,630 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 08:16:00,632 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 08:16:00,634 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 08:16:00,636 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 08:16:00,637 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 08:16:00,638 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 08:16:00,642 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 08:16:00,646 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 08:16:00,647 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 08:16:00,648 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 08:16:00,649 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 08:16:00,654 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 08:16:00,654 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 08:16:00,655 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 08:16:00,656 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 08:16:00,656 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 08:16:00,657 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 08:16:00,659 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 08:16:00,660 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 08:16:00,695 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 08:16:00,696 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 08:16:00,697 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 08:16:00,697 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 08:16:00,698 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 08:16:00,698 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 08:16:00,698 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 08:16:00,698 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 08:16:00,698 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 08:16:00,699 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 08:16:00,699 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 08:16:00,699 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 08:16:00,699 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 08:16:00,700 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 08:16:00,700 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 08:16:00,700 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 08:16:00,700 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 08:16:00,700 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 08:16:00,701 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 08:16:00,701 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 08:16:00,701 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 08:16:00,701 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 08:16:00,702 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 08:16:00,702 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 08:16:00,702 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 08:16:00,702 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 08:16:01,139 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 08:16:01,170 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 08:16:01,174 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 08:16:01,176 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 08:16:01,176 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 08:16:01,177 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-12-22 08:16:01,250 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e4fa02cbc/db8ac627f6434d28bac137346167faef/FLAG66fdee5f3 [2020-12-22 08:16:01,834 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 08:16:01,837 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-12-22 08:16:01,857 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e4fa02cbc/db8ac627f6434d28bac137346167faef/FLAG66fdee5f3 [2020-12-22 08:16:02,146 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e4fa02cbc/db8ac627f6434d28bac137346167faef [2020-12-22 08:16:02,155 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 08:16:02,160 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 08:16:02,164 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 08:16:02,165 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 08:16:02,170 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 08:16:02,171 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 08:16:02" (1/1) ... [2020-12-22 08:16:02,175 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@71820ed9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:16:02, skipping insertion in model container [2020-12-22 08:16:02,175 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 08:16:02" (1/1) ... [2020-12-22 08:16:02,185 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 08:16:02,263 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 08:16:02,686 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c[6761,6774] [2020-12-22 08:16:02,733 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 08:16:02,751 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 08:16:02,836 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c[6761,6774] [2020-12-22 08:16:02,866 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 08:16:02,888 INFO L208 MainTranslator]: Completed translation [2020-12-22 08:16:02,889 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:16:02 WrapperNode [2020-12-22 08:16:02,889 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 08:16:02,891 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 08:16:02,891 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 08:16:02,891 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 08:16:02,901 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:16:02" (1/1) ... [2020-12-22 08:16:02,963 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:16:02" (1/1) ... [2020-12-22 08:16:03,083 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 08:16:03,088 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 08:16:03,088 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 08:16:03,088 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 08:16:03,105 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:16:02" (1/1) ... [2020-12-22 08:16:03,106 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:16:02" (1/1) ... [2020-12-22 08:16:03,114 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:16:02" (1/1) ... [2020-12-22 08:16:03,119 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:16:02" (1/1) ... [2020-12-22 08:16:03,143 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:16:02" (1/1) ... [2020-12-22 08:16:03,159 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:16:02" (1/1) ... [2020-12-22 08:16:03,165 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:16:02" (1/1) ... [2020-12-22 08:16:03,176 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 08:16:03,177 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 08:16:03,177 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 08:16:03,177 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 08:16:03,182 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:16:02" (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 08:16:03,303 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 08:16:03,304 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 08:16:03,304 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 08:16:03,306 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 08:16:04,245 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 08:16:04,246 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2020-12-22 08:16:04,249 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 08:16:04 BoogieIcfgContainer [2020-12-22 08:16:04,250 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 08:16:04,252 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 08:16:04,253 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 08:16:04,257 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 08:16:04,259 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 08:16:02" (1/3) ... [2020-12-22 08:16:04,260 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c88fe83 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 08:16:04, skipping insertion in model container [2020-12-22 08:16:04,260 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:16:02" (2/3) ... [2020-12-22 08:16:04,261 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c88fe83 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 08:16:04, skipping insertion in model container [2020-12-22 08:16:04,261 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 08:16:04" (3/3) ... [2020-12-22 08:16:04,263 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.3.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-12-22 08:16:04,270 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 08:16:04,277 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 08:16:04,304 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 08:16:04,356 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 08:16:04,356 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 08:16:04,356 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 08:16:04,357 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 08:16:04,357 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 08:16:04,357 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 08:16:04,357 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 08:16:04,357 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 08:16:04,386 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states. [2020-12-22 08:16:04,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-12-22 08:16:04,397 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:16:04,398 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] [2020-12-22 08:16:04,399 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:16:04,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:16:04,406 INFO L82 PathProgramCache]: Analyzing trace with hash 293786216, now seen corresponding path program 1 times [2020-12-22 08:16:04,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:16:04,418 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570227148] [2020-12-22 08:16:04,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:16:04,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:16:04,834 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 08:16:04,835 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570227148] [2020-12-22 08:16:04,836 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:16:04,836 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:16:04,837 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732068354] [2020-12-22 08:16:04,842 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:16:04,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:16:04,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:16:04,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:16:04,861 INFO L87 Difference]: Start difference. First operand 161 states. Second operand 3 states. [2020-12-22 08:16:05,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:16:05,005 INFO L93 Difference]: Finished difference Result 308 states and 501 transitions. [2020-12-22 08:16:05,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:16:05,028 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 49 [2020-12-22 08:16:05,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:16:05,060 INFO L225 Difference]: With dead ends: 308 [2020-12-22 08:16:05,060 INFO L226 Difference]: Without dead ends: 235 [2020-12-22 08:16:05,067 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 08:16:05,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2020-12-22 08:16:05,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 233. [2020-12-22 08:16:05,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 233 states. [2020-12-22 08:16:05,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 350 transitions. [2020-12-22 08:16:05,169 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 350 transitions. Word has length 49 [2020-12-22 08:16:05,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:16:05,170 INFO L481 AbstractCegarLoop]: Abstraction has 233 states and 350 transitions. [2020-12-22 08:16:05,170 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:16:05,170 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 350 transitions. [2020-12-22 08:16:05,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-12-22 08:16:05,173 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:16:05,173 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] [2020-12-22 08:16:05,173 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 08:16:05,174 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:16:05,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:16:05,175 INFO L82 PathProgramCache]: Analyzing trace with hash -1697275801, now seen corresponding path program 1 times [2020-12-22 08:16:05,175 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:16:05,176 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641190746] [2020-12-22 08:16:05,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:16:05,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:16:05,358 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 08:16:05,358 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641190746] [2020-12-22 08:16:05,359 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:16:05,359 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:16:05,360 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620868348] [2020-12-22 08:16:05,362 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:16:05,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:16:05,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:16:05,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:16:05,364 INFO L87 Difference]: Start difference. First operand 233 states and 350 transitions. Second operand 3 states. [2020-12-22 08:16:05,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:16:05,457 INFO L93 Difference]: Finished difference Result 571 states and 877 transitions. [2020-12-22 08:16:05,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:16:05,458 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 52 [2020-12-22 08:16:05,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:16:05,461 INFO L225 Difference]: With dead ends: 571 [2020-12-22 08:16:05,461 INFO L226 Difference]: Without dead ends: 395 [2020-12-22 08:16:05,463 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 08:16:05,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2020-12-22 08:16:05,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 393. [2020-12-22 08:16:05,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 393 states. [2020-12-22 08:16:05,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 590 transitions. [2020-12-22 08:16:05,513 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 590 transitions. Word has length 52 [2020-12-22 08:16:05,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:16:05,516 INFO L481 AbstractCegarLoop]: Abstraction has 393 states and 590 transitions. [2020-12-22 08:16:05,516 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:16:05,516 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 590 transitions. [2020-12-22 08:16:05,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-12-22 08:16:05,519 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:16:05,520 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] [2020-12-22 08:16:05,520 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 08:16:05,522 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:16:05,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:16:05,523 INFO L82 PathProgramCache]: Analyzing trace with hash -195371450, now seen corresponding path program 1 times [2020-12-22 08:16:05,523 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:16:05,524 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808353821] [2020-12-22 08:16:05,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:16:05,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:16:05,626 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 08:16:05,626 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808353821] [2020-12-22 08:16:05,627 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:16:05,627 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:16:05,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135267836] [2020-12-22 08:16:05,628 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:16:05,628 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:16:05,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:16:05,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:16:05,630 INFO L87 Difference]: Start difference. First operand 393 states and 590 transitions. Second operand 3 states. [2020-12-22 08:16:05,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:16:05,697 INFO L93 Difference]: Finished difference Result 975 states and 1485 transitions. [2020-12-22 08:16:05,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:16:05,698 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 52 [2020-12-22 08:16:05,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:16:05,703 INFO L225 Difference]: With dead ends: 975 [2020-12-22 08:16:05,703 INFO L226 Difference]: Without dead ends: 681 [2020-12-22 08:16:05,705 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 08:16:05,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 681 states. [2020-12-22 08:16:05,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 681 to 679. [2020-12-22 08:16:05,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 679 states. [2020-12-22 08:16:05,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 679 states to 679 states and 1013 transitions. [2020-12-22 08:16:05,770 INFO L78 Accepts]: Start accepts. Automaton has 679 states and 1013 transitions. Word has length 52 [2020-12-22 08:16:05,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:16:05,776 INFO L481 AbstractCegarLoop]: Abstraction has 679 states and 1013 transitions. [2020-12-22 08:16:05,776 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:16:05,777 INFO L276 IsEmpty]: Start isEmpty. Operand 679 states and 1013 transitions. [2020-12-22 08:16:05,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-12-22 08:16:05,782 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:16:05,782 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] [2020-12-22 08:16:05,783 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 08:16:05,785 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:16:05,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:16:05,785 INFO L82 PathProgramCache]: Analyzing trace with hash -1046972601, now seen corresponding path program 1 times [2020-12-22 08:16:05,786 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:16:05,788 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34805385] [2020-12-22 08:16:05,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:16:05,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:16:05,888 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 08:16:05,888 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34805385] [2020-12-22 08:16:05,889 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:16:05,889 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:16:05,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2323500] [2020-12-22 08:16:05,890 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:16:05,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:16:05,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:16:05,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:16:05,891 INFO L87 Difference]: Start difference. First operand 679 states and 1013 transitions. Second operand 3 states. [2020-12-22 08:16:05,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:16:05,993 INFO L93 Difference]: Finished difference Result 1661 states and 2497 transitions. [2020-12-22 08:16:05,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:16:05,994 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 52 [2020-12-22 08:16:05,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:16:06,001 INFO L225 Difference]: With dead ends: 1661 [2020-12-22 08:16:06,002 INFO L226 Difference]: Without dead ends: 1165 [2020-12-22 08:16:06,003 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 08:16:06,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1165 states. [2020-12-22 08:16:06,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1165 to 1163. [2020-12-22 08:16:06,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1163 states. [2020-12-22 08:16:06,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1163 states to 1163 states and 1710 transitions. [2020-12-22 08:16:06,067 INFO L78 Accepts]: Start accepts. Automaton has 1163 states and 1710 transitions. Word has length 52 [2020-12-22 08:16:06,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:16:06,067 INFO L481 AbstractCegarLoop]: Abstraction has 1163 states and 1710 transitions. [2020-12-22 08:16:06,067 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:16:06,067 INFO L276 IsEmpty]: Start isEmpty. Operand 1163 states and 1710 transitions. [2020-12-22 08:16:06,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-12-22 08:16:06,070 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:16:06,070 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] [2020-12-22 08:16:06,071 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 08:16:06,071 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:16:06,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:16:06,072 INFO L82 PathProgramCache]: Analyzing trace with hash 1633425885, now seen corresponding path program 1 times [2020-12-22 08:16:06,072 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:16:06,072 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377295199] [2020-12-22 08:16:06,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:16:06,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:16:06,164 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 08:16:06,164 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377295199] [2020-12-22 08:16:06,164 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:16:06,165 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 08:16:06,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708328975] [2020-12-22 08:16:06,165 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 08:16:06,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:16:06,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 08:16:06,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:16:06,167 INFO L87 Difference]: Start difference. First operand 1163 states and 1710 transitions. Second operand 5 states. [2020-12-22 08:16:06,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:16:06,669 INFO L93 Difference]: Finished difference Result 3269 states and 4842 transitions. [2020-12-22 08:16:06,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 08:16:06,670 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 53 [2020-12-22 08:16:06,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:16:06,682 INFO L225 Difference]: With dead ends: 3269 [2020-12-22 08:16:06,682 INFO L226 Difference]: Without dead ends: 2133 [2020-12-22 08:16:06,684 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 08:16:06,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2133 states. [2020-12-22 08:16:06,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2133 to 2119. [2020-12-22 08:16:06,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2119 states. [2020-12-22 08:16:06,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2119 states to 2119 states and 3124 transitions. [2020-12-22 08:16:06,818 INFO L78 Accepts]: Start accepts. Automaton has 2119 states and 3124 transitions. Word has length 53 [2020-12-22 08:16:06,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:16:06,819 INFO L481 AbstractCegarLoop]: Abstraction has 2119 states and 3124 transitions. [2020-12-22 08:16:06,819 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 08:16:06,819 INFO L276 IsEmpty]: Start isEmpty. Operand 2119 states and 3124 transitions. [2020-12-22 08:16:06,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-12-22 08:16:06,821 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:16:06,821 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] [2020-12-22 08:16:06,821 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 08:16:06,821 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:16:06,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:16:06,822 INFO L82 PathProgramCache]: Analyzing trace with hash 1286312845, now seen corresponding path program 1 times [2020-12-22 08:16:06,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:16:06,823 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043800959] [2020-12-22 08:16:06,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:16:06,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:16:06,923 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 08:16:06,923 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043800959] [2020-12-22 08:16:06,924 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:16:06,924 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 08:16:06,924 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680993615] [2020-12-22 08:16:06,925 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 08:16:06,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:16:06,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 08:16:06,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:16:06,926 INFO L87 Difference]: Start difference. First operand 2119 states and 3124 transitions. Second operand 5 states. [2020-12-22 08:16:07,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:16:07,370 INFO L93 Difference]: Finished difference Result 6895 states and 10296 transitions. [2020-12-22 08:16:07,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 08:16:07,370 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 53 [2020-12-22 08:16:07,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:16:07,399 INFO L225 Difference]: With dead ends: 6895 [2020-12-22 08:16:07,400 INFO L226 Difference]: Without dead ends: 5477 [2020-12-22 08:16:07,404 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-12-22 08:16:07,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5477 states. [2020-12-22 08:16:07,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5477 to 2534. [2020-12-22 08:16:07,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2534 states. [2020-12-22 08:16:07,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2534 states to 2534 states and 3755 transitions. [2020-12-22 08:16:07,662 INFO L78 Accepts]: Start accepts. Automaton has 2534 states and 3755 transitions. Word has length 53 [2020-12-22 08:16:07,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:16:07,663 INFO L481 AbstractCegarLoop]: Abstraction has 2534 states and 3755 transitions. [2020-12-22 08:16:07,663 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 08:16:07,663 INFO L276 IsEmpty]: Start isEmpty. Operand 2534 states and 3755 transitions. [2020-12-22 08:16:07,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-12-22 08:16:07,665 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:16:07,665 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] [2020-12-22 08:16:07,665 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 08:16:07,666 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:16:07,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:16:07,672 INFO L82 PathProgramCache]: Analyzing trace with hash -1015763425, now seen corresponding path program 1 times [2020-12-22 08:16:07,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:16:07,673 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169080474] [2020-12-22 08:16:07,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:16:07,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:16:07,796 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 08:16:07,796 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169080474] [2020-12-22 08:16:07,797 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:16:07,798 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 08:16:07,798 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384662154] [2020-12-22 08:16:07,799 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 08:16:07,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:16:07,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 08:16:07,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-12-22 08:16:07,800 INFO L87 Difference]: Start difference. First operand 2534 states and 3755 transitions. Second operand 6 states. [2020-12-22 08:16:08,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:16:08,515 INFO L93 Difference]: Finished difference Result 7874 states and 11688 transitions. [2020-12-22 08:16:08,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 08:16:08,516 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 53 [2020-12-22 08:16:08,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:16:08,544 INFO L225 Difference]: With dead ends: 7874 [2020-12-22 08:16:08,544 INFO L226 Difference]: Without dead ends: 5421 [2020-12-22 08:16:08,552 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2020-12-22 08:16:08,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5421 states. [2020-12-22 08:16:08,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5421 to 5377. [2020-12-22 08:16:08,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5377 states. [2020-12-22 08:16:08,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5377 states to 5377 states and 7950 transitions. [2020-12-22 08:16:08,975 INFO L78 Accepts]: Start accepts. Automaton has 5377 states and 7950 transitions. Word has length 53 [2020-12-22 08:16:08,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:16:08,976 INFO L481 AbstractCegarLoop]: Abstraction has 5377 states and 7950 transitions. [2020-12-22 08:16:08,976 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 08:16:08,976 INFO L276 IsEmpty]: Start isEmpty. Operand 5377 states and 7950 transitions. [2020-12-22 08:16:08,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-12-22 08:16:08,978 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:16:08,978 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] [2020-12-22 08:16:08,979 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 08:16:08,979 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:16:08,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:16:08,979 INFO L82 PathProgramCache]: Analyzing trace with hash 2014010067, now seen corresponding path program 1 times [2020-12-22 08:16:08,980 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:16:08,980 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771728626] [2020-12-22 08:16:08,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:16:09,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:16:09,058 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 08:16:09,059 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771728626] [2020-12-22 08:16:09,059 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:16:09,059 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 08:16:09,060 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474284536] [2020-12-22 08:16:09,060 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 08:16:09,060 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:16:09,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 08:16:09,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:16:09,061 INFO L87 Difference]: Start difference. First operand 5377 states and 7950 transitions. Second operand 5 states. [2020-12-22 08:16:10,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:16:10,068 INFO L93 Difference]: Finished difference Result 16873 states and 25054 transitions. [2020-12-22 08:16:10,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 08:16:10,068 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 54 [2020-12-22 08:16:10,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:16:10,134 INFO L225 Difference]: With dead ends: 16873 [2020-12-22 08:16:10,135 INFO L226 Difference]: Without dead ends: 13467 [2020-12-22 08:16:10,150 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-12-22 08:16:10,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13467 states. [2020-12-22 08:16:10,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13467 to 6963. [2020-12-22 08:16:10,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6963 states. [2020-12-22 08:16:10,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6963 states to 6963 states and 10363 transitions. [2020-12-22 08:16:10,797 INFO L78 Accepts]: Start accepts. Automaton has 6963 states and 10363 transitions. Word has length 54 [2020-12-22 08:16:10,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:16:10,797 INFO L481 AbstractCegarLoop]: Abstraction has 6963 states and 10363 transitions. [2020-12-22 08:16:10,797 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 08:16:10,797 INFO L276 IsEmpty]: Start isEmpty. Operand 6963 states and 10363 transitions. [2020-12-22 08:16:10,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-12-22 08:16:10,800 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:16:10,800 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] [2020-12-22 08:16:10,800 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 08:16:10,801 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:16:10,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:16:10,802 INFO L82 PathProgramCache]: Analyzing trace with hash -697153037, now seen corresponding path program 1 times [2020-12-22 08:16:10,803 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:16:10,803 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246165147] [2020-12-22 08:16:10,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:16:10,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:16:10,952 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 08:16:10,957 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246165147] [2020-12-22 08:16:10,957 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:16:10,958 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 08:16:10,958 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290758186] [2020-12-22 08:16:10,962 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 08:16:10,963 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:16:10,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 08:16:10,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:16:10,965 INFO L87 Difference]: Start difference. First operand 6963 states and 10363 transitions. Second operand 5 states. [2020-12-22 08:16:11,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:16:11,894 INFO L93 Difference]: Finished difference Result 17301 states and 25718 transitions. [2020-12-22 08:16:11,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 08:16:11,894 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 54 [2020-12-22 08:16:11,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:16:11,931 INFO L225 Difference]: With dead ends: 17301 [2020-12-22 08:16:11,931 INFO L226 Difference]: Without dead ends: 13895 [2020-12-22 08:16:11,939 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:16:11,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13895 states. [2020-12-22 08:16:12,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13895 to 8273. [2020-12-22 08:16:12,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8273 states. [2020-12-22 08:16:12,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8273 states to 8273 states and 12325 transitions. [2020-12-22 08:16:12,733 INFO L78 Accepts]: Start accepts. Automaton has 8273 states and 12325 transitions. Word has length 54 [2020-12-22 08:16:12,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:16:12,733 INFO L481 AbstractCegarLoop]: Abstraction has 8273 states and 12325 transitions. [2020-12-22 08:16:12,733 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 08:16:12,733 INFO L276 IsEmpty]: Start isEmpty. Operand 8273 states and 12325 transitions. [2020-12-22 08:16:12,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-12-22 08:16:12,736 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:16:12,737 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] [2020-12-22 08:16:12,737 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 08:16:12,737 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:16:12,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:16:12,738 INFO L82 PathProgramCache]: Analyzing trace with hash 1161753004, now seen corresponding path program 1 times [2020-12-22 08:16:12,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:16:12,739 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847802158] [2020-12-22 08:16:12,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:16:12,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:16:12,837 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 08:16:12,837 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847802158] [2020-12-22 08:16:12,837 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:16:12,837 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 08:16:12,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983979125] [2020-12-22 08:16:12,838 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 08:16:12,838 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:16:12,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 08:16:12,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-12-22 08:16:12,839 INFO L87 Difference]: Start difference. First operand 8273 states and 12325 transitions. Second operand 6 states. [2020-12-22 08:16:14,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:16:14,111 INFO L93 Difference]: Finished difference Result 26419 states and 39303 transitions. [2020-12-22 08:16:14,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 08:16:14,113 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 58 [2020-12-22 08:16:14,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:16:14,160 INFO L225 Difference]: With dead ends: 26419 [2020-12-22 08:16:14,160 INFO L226 Difference]: Without dead ends: 18191 [2020-12-22 08:16:14,176 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2020-12-22 08:16:14,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18191 states. [2020-12-22 08:16:16,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18191 to 18063. [2020-12-22 08:16:16,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18063 states. [2020-12-22 08:16:16,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18063 states to 18063 states and 26749 transitions. [2020-12-22 08:16:16,300 INFO L78 Accepts]: Start accepts. Automaton has 18063 states and 26749 transitions. Word has length 58 [2020-12-22 08:16:16,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:16:16,301 INFO L481 AbstractCegarLoop]: Abstraction has 18063 states and 26749 transitions. [2020-12-22 08:16:16,301 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 08:16:16,301 INFO L276 IsEmpty]: Start isEmpty. Operand 18063 states and 26749 transitions. [2020-12-22 08:16:16,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-12-22 08:16:16,306 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:16:16,306 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] [2020-12-22 08:16:16,306 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 08:16:16,306 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:16:16,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:16:16,307 INFO L82 PathProgramCache]: Analyzing trace with hash 536362735, now seen corresponding path program 1 times [2020-12-22 08:16:16,307 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:16:16,307 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415053399] [2020-12-22 08:16:16,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:16:16,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:16:16,393 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 08:16:16,393 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415053399] [2020-12-22 08:16:16,393 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:16:16,394 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 08:16:16,394 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321481485] [2020-12-22 08:16:16,394 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 08:16:16,394 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:16:16,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 08:16:16,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-12-22 08:16:16,397 INFO L87 Difference]: Start difference. First operand 18063 states and 26749 transitions. Second operand 7 states. [2020-12-22 08:16:20,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:16:20,977 INFO L93 Difference]: Finished difference Result 68375 states and 100171 transitions. [2020-12-22 08:16:20,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-22 08:16:20,977 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 59 [2020-12-22 08:16:20,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:16:21,122 INFO L225 Difference]: With dead ends: 68375 [2020-12-22 08:16:21,122 INFO L226 Difference]: Without dead ends: 60389 [2020-12-22 08:16:21,149 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2020-12-22 08:16:21,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60389 states. [2020-12-22 08:16:23,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60389 to 18083. [2020-12-22 08:16:23,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18083 states. [2020-12-22 08:16:23,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18083 states to 18083 states and 26773 transitions. [2020-12-22 08:16:23,363 INFO L78 Accepts]: Start accepts. Automaton has 18083 states and 26773 transitions. Word has length 59 [2020-12-22 08:16:23,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:16:23,364 INFO L481 AbstractCegarLoop]: Abstraction has 18083 states and 26773 transitions. [2020-12-22 08:16:23,364 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 08:16:23,364 INFO L276 IsEmpty]: Start isEmpty. Operand 18083 states and 26773 transitions. [2020-12-22 08:16:23,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-12-22 08:16:23,369 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:16:23,369 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] [2020-12-22 08:16:23,370 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 08:16:23,370 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:16:23,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:16:23,370 INFO L82 PathProgramCache]: Analyzing trace with hash -426804272, now seen corresponding path program 1 times [2020-12-22 08:16:23,371 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:16:23,376 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386965460] [2020-12-22 08:16:23,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:16:23,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:16:23,455 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 08:16:23,455 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386965460] [2020-12-22 08:16:23,456 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:16:23,456 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 08:16:23,456 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092685290] [2020-12-22 08:16:23,456 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 08:16:23,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:16:23,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 08:16:23,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-12-22 08:16:23,458 INFO L87 Difference]: Start difference. First operand 18083 states and 26773 transitions. Second operand 7 states. [2020-12-22 08:16:30,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:16:30,045 INFO L93 Difference]: Finished difference Result 80539 states and 117755 transitions. [2020-12-22 08:16:30,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-22 08:16:30,046 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 59 [2020-12-22 08:16:30,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:16:30,212 INFO L225 Difference]: With dead ends: 80539 [2020-12-22 08:16:30,212 INFO L226 Difference]: Without dead ends: 72607 [2020-12-22 08:16:30,250 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2020-12-22 08:16:30,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72607 states. [2020-12-22 08:16:32,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72607 to 18193. [2020-12-22 08:16:32,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18193 states. [2020-12-22 08:16:32,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18193 states to 18193 states and 26915 transitions. [2020-12-22 08:16:32,579 INFO L78 Accepts]: Start accepts. Automaton has 18193 states and 26915 transitions. Word has length 59 [2020-12-22 08:16:32,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:16:32,580 INFO L481 AbstractCegarLoop]: Abstraction has 18193 states and 26915 transitions. [2020-12-22 08:16:32,580 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 08:16:32,580 INFO L276 IsEmpty]: Start isEmpty. Operand 18193 states and 26915 transitions. [2020-12-22 08:16:32,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-12-22 08:16:32,584 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:16:32,584 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] [2020-12-22 08:16:32,585 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 08:16:32,585 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:16:32,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:16:32,585 INFO L82 PathProgramCache]: Analyzing trace with hash -974429839, now seen corresponding path program 1 times [2020-12-22 08:16:32,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:16:32,586 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437032328] [2020-12-22 08:16:32,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:16:32,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:16:32,670 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 08:16:32,670 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437032328] [2020-12-22 08:16:32,671 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:16:32,671 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 08:16:32,671 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573440362] [2020-12-22 08:16:32,671 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 08:16:32,672 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:16:32,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 08:16:32,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-12-22 08:16:32,673 INFO L87 Difference]: Start difference. First operand 18193 states and 26915 transitions. Second operand 7 states. [2020-12-22 08:16:42,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:16:42,894 INFO L93 Difference]: Finished difference Result 101278 states and 148259 transitions. [2020-12-22 08:16:42,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-22 08:16:42,894 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 59 [2020-12-22 08:16:42,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:16:43,034 INFO L225 Difference]: With dead ends: 101278 [2020-12-22 08:16:43,034 INFO L226 Difference]: Without dead ends: 94828 [2020-12-22 08:16:43,071 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2020-12-22 08:16:43,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94828 states. [2020-12-22 08:16:45,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94828 to 18249. [2020-12-22 08:16:45,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18249 states. [2020-12-22 08:16:45,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18249 states to 18249 states and 26984 transitions. [2020-12-22 08:16:45,674 INFO L78 Accepts]: Start accepts. Automaton has 18249 states and 26984 transitions. Word has length 59 [2020-12-22 08:16:45,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:16:45,674 INFO L481 AbstractCegarLoop]: Abstraction has 18249 states and 26984 transitions. [2020-12-22 08:16:45,674 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 08:16:45,674 INFO L276 IsEmpty]: Start isEmpty. Operand 18249 states and 26984 transitions. [2020-12-22 08:16:45,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-12-22 08:16:45,681 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:16:45,682 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] [2020-12-22 08:16:45,682 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 08:16:45,682 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:16:45,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:16:45,682 INFO L82 PathProgramCache]: Analyzing trace with hash -1695106365, now seen corresponding path program 1 times [2020-12-22 08:16:45,683 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:16:45,683 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477476357] [2020-12-22 08:16:45,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:16:45,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:16:45,944 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 08:16:45,944 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477476357] [2020-12-22 08:16:45,944 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:16:45,945 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 08:16:45,945 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248995112] [2020-12-22 08:16:45,945 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 08:16:45,945 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:16:45,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 08:16:45,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-12-22 08:16:45,946 INFO L87 Difference]: Start difference. First operand 18249 states and 26984 transitions. Second operand 10 states. [2020-12-22 08:16:54,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:16:54,031 INFO L93 Difference]: Finished difference Result 62666 states and 92207 transitions. [2020-12-22 08:16:54,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-22 08:16:54,032 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 61 [2020-12-22 08:16:54,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:16:54,092 INFO L225 Difference]: With dead ends: 62666 [2020-12-22 08:16:54,092 INFO L226 Difference]: Without dead ends: 46429 [2020-12-22 08:16:54,112 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=250, Invalid=742, Unknown=0, NotChecked=0, Total=992 [2020-12-22 08:16:54,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46429 states. [2020-12-22 08:16:56,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46429 to 18029. [2020-12-22 08:16:56,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18029 states. [2020-12-22 08:16:56,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18029 states to 18029 states and 26634 transitions. [2020-12-22 08:16:56,669 INFO L78 Accepts]: Start accepts. Automaton has 18029 states and 26634 transitions. Word has length 61 [2020-12-22 08:16:56,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:16:56,669 INFO L481 AbstractCegarLoop]: Abstraction has 18029 states and 26634 transitions. [2020-12-22 08:16:56,669 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 08:16:56,669 INFO L276 IsEmpty]: Start isEmpty. Operand 18029 states and 26634 transitions. [2020-12-22 08:16:56,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-12-22 08:16:56,676 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:16:56,676 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] [2020-12-22 08:16:56,676 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 08:16:56,676 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:16:56,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:16:56,677 INFO L82 PathProgramCache]: Analyzing trace with hash 1748259780, now seen corresponding path program 1 times [2020-12-22 08:16:56,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:16:56,677 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499418352] [2020-12-22 08:16:56,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:16:56,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:16:56,859 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:16:56,859 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499418352] [2020-12-22 08:16:56,859 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:16:56,859 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 08:16:56,860 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416635769] [2020-12-22 08:16:56,860 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 08:16:56,860 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:16:56,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 08:16:56,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-12-22 08:16:56,861 INFO L87 Difference]: Start difference. First operand 18029 states and 26634 transitions. Second operand 10 states. [2020-12-22 08:17:08,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:17:08,790 INFO L93 Difference]: Finished difference Result 86475 states and 126244 transitions. [2020-12-22 08:17:08,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-12-22 08:17:08,791 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 61 [2020-12-22 08:17:08,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:17:08,876 INFO L225 Difference]: With dead ends: 86475 [2020-12-22 08:17:08,876 INFO L226 Difference]: Without dead ends: 70149 [2020-12-22 08:17:08,899 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=272, Invalid=850, Unknown=0, NotChecked=0, Total=1122 [2020-12-22 08:17:08,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70149 states. [2020-12-22 08:17:12,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70149 to 17747. [2020-12-22 08:17:12,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17747 states. [2020-12-22 08:17:12,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17747 states to 17747 states and 26204 transitions. [2020-12-22 08:17:12,163 INFO L78 Accepts]: Start accepts. Automaton has 17747 states and 26204 transitions. Word has length 61 [2020-12-22 08:17:12,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:17:12,163 INFO L481 AbstractCegarLoop]: Abstraction has 17747 states and 26204 transitions. [2020-12-22 08:17:12,163 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 08:17:12,163 INFO L276 IsEmpty]: Start isEmpty. Operand 17747 states and 26204 transitions. [2020-12-22 08:17:12,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-12-22 08:17:12,168 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:17:12,168 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] [2020-12-22 08:17:12,168 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 08:17:12,168 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:17:12,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:17:12,169 INFO L82 PathProgramCache]: Analyzing trace with hash 11490693, now seen corresponding path program 1 times [2020-12-22 08:17:12,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:17:12,169 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417022069] [2020-12-22 08:17:12,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:17:12,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:17:12,377 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 08:17:12,378 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417022069] [2020-12-22 08:17:12,378 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:17:12,378 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 08:17:12,379 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106387462] [2020-12-22 08:17:12,379 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 08:17:12,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:17:12,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 08:17:12,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-12-22 08:17:12,380 INFO L87 Difference]: Start difference. First operand 17747 states and 26204 transitions. Second operand 10 states. [2020-12-22 08:17:21,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:17:21,521 INFO L93 Difference]: Finished difference Result 62167 states and 91389 transitions. [2020-12-22 08:17:21,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-12-22 08:17:21,522 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 61 [2020-12-22 08:17:21,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:17:21,575 INFO L225 Difference]: With dead ends: 62167 [2020-12-22 08:17:21,575 INFO L226 Difference]: Without dead ends: 45886 [2020-12-22 08:17:21,590 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=234, Invalid=636, Unknown=0, NotChecked=0, Total=870 [2020-12-22 08:17:21,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45886 states. [2020-12-22 08:17:24,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45886 to 17542. [2020-12-22 08:17:24,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17542 states. [2020-12-22 08:17:24,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17542 states to 17542 states and 25919 transitions. [2020-12-22 08:17:24,868 INFO L78 Accepts]: Start accepts. Automaton has 17542 states and 25919 transitions. Word has length 61 [2020-12-22 08:17:24,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:17:24,869 INFO L481 AbstractCegarLoop]: Abstraction has 17542 states and 25919 transitions. [2020-12-22 08:17:24,869 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 08:17:24,869 INFO L276 IsEmpty]: Start isEmpty. Operand 17542 states and 25919 transitions. [2020-12-22 08:17:24,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-12-22 08:17:24,873 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:17:24,873 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] [2020-12-22 08:17:24,873 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 08:17:24,874 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:17:24,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:17:24,874 INFO L82 PathProgramCache]: Analyzing trace with hash -746765663, now seen corresponding path program 1 times [2020-12-22 08:17:24,875 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:17:24,875 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685712893] [2020-12-22 08:17:24,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:17:24,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:17:24,917 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 08:17:24,917 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685712893] [2020-12-22 08:17:24,917 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:17:24,918 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:17:24,918 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208169420] [2020-12-22 08:17:24,918 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:17:24,918 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:17:24,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:17:24,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:17:24,919 INFO L87 Difference]: Start difference. First operand 17542 states and 25919 transitions. Second operand 3 states. [2020-12-22 08:17:27,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:17:27,831 INFO L93 Difference]: Finished difference Result 23971 states and 35267 transitions. [2020-12-22 08:17:27,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:17:27,832 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 62 [2020-12-22 08:17:27,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:17:27,865 INFO L225 Difference]: With dead ends: 23971 [2020-12-22 08:17:27,865 INFO L226 Difference]: Without dead ends: 17425 [2020-12-22 08:17:27,876 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 08:17:27,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17425 states. [2020-12-22 08:17:30,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17425 to 17423. [2020-12-22 08:17:30,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17423 states. [2020-12-22 08:17:30,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17423 states to 17423 states and 25221 transitions. [2020-12-22 08:17:30,710 INFO L78 Accepts]: Start accepts. Automaton has 17423 states and 25221 transitions. Word has length 62 [2020-12-22 08:17:30,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:17:30,710 INFO L481 AbstractCegarLoop]: Abstraction has 17423 states and 25221 transitions. [2020-12-22 08:17:30,710 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:17:30,710 INFO L276 IsEmpty]: Start isEmpty. Operand 17423 states and 25221 transitions. [2020-12-22 08:17:30,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-12-22 08:17:30,714 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:17:30,714 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] [2020-12-22 08:17:30,715 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 08:17:30,715 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:17:30,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:17:30,715 INFO L82 PathProgramCache]: Analyzing trace with hash -691619625, now seen corresponding path program 1 times [2020-12-22 08:17:30,715 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:17:30,716 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144284234] [2020-12-22 08:17:30,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:17:30,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:17:30,759 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 08:17:30,760 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144284234] [2020-12-22 08:17:30,760 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:17:30,760 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:17:30,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100374841] [2020-12-22 08:17:30,761 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:17:30,761 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:17:30,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:17:30,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:17:30,762 INFO L87 Difference]: Start difference. First operand 17423 states and 25221 transitions. Second operand 3 states. [2020-12-22 08:17:33,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:17:33,342 INFO L93 Difference]: Finished difference Result 23609 states and 34104 transitions. [2020-12-22 08:17:33,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:17:33,342 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 62 [2020-12-22 08:17:33,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:17:33,360 INFO L225 Difference]: With dead ends: 23609 [2020-12-22 08:17:33,361 INFO L226 Difference]: Without dead ends: 15786 [2020-12-22 08:17:33,376 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 08:17:33,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15786 states. [2020-12-22 08:17:35,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15786 to 15784. [2020-12-22 08:17:35,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15784 states. [2020-12-22 08:17:35,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15784 states to 15784 states and 22477 transitions. [2020-12-22 08:17:35,959 INFO L78 Accepts]: Start accepts. Automaton has 15784 states and 22477 transitions. Word has length 62 [2020-12-22 08:17:35,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:17:35,959 INFO L481 AbstractCegarLoop]: Abstraction has 15784 states and 22477 transitions. [2020-12-22 08:17:35,959 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:17:35,959 INFO L276 IsEmpty]: Start isEmpty. Operand 15784 states and 22477 transitions. [2020-12-22 08:17:35,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-12-22 08:17:35,963 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:17:35,963 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] [2020-12-22 08:17:35,963 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 08:17:35,963 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:17:35,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:17:35,964 INFO L82 PathProgramCache]: Analyzing trace with hash -1051063940, now seen corresponding path program 1 times [2020-12-22 08:17:35,964 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:17:35,964 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098975535] [2020-12-22 08:17:35,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:17:35,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:17:36,005 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 08:17:36,006 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098975535] [2020-12-22 08:17:36,006 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:17:36,006 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:17:36,007 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175147992] [2020-12-22 08:17:36,007 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:17:36,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:17:36,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:17:36,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:17:36,008 INFO L87 Difference]: Start difference. First operand 15784 states and 22477 transitions. Second operand 3 states. [2020-12-22 08:17:38,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:17:38,738 INFO L93 Difference]: Finished difference Result 20567 states and 29232 transitions. [2020-12-22 08:17:38,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:17:38,739 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 62 [2020-12-22 08:17:38,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:17:38,753 INFO L225 Difference]: With dead ends: 20567 [2020-12-22 08:17:38,753 INFO L226 Difference]: Without dead ends: 13370 [2020-12-22 08:17:38,761 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 08:17:38,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13370 states. [2020-12-22 08:17:40,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13370 to 13368. [2020-12-22 08:17:40,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13368 states. [2020-12-22 08:17:40,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13368 states to 13368 states and 18741 transitions. [2020-12-22 08:17:40,893 INFO L78 Accepts]: Start accepts. Automaton has 13368 states and 18741 transitions. Word has length 62 [2020-12-22 08:17:40,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:17:40,893 INFO L481 AbstractCegarLoop]: Abstraction has 13368 states and 18741 transitions. [2020-12-22 08:17:40,893 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:17:40,893 INFO L276 IsEmpty]: Start isEmpty. Operand 13368 states and 18741 transitions. [2020-12-22 08:17:40,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-22 08:17:40,896 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:17:40,896 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] [2020-12-22 08:17:40,897 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 08:17:40,897 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:17:40,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:17:40,897 INFO L82 PathProgramCache]: Analyzing trace with hash -751537894, now seen corresponding path program 1 times [2020-12-22 08:17:40,898 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:17:40,898 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094342319] [2020-12-22 08:17:40,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:17:40,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:17:40,934 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 08:17:40,935 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094342319] [2020-12-22 08:17:40,935 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:17:40,935 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:17:40,935 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115160103] [2020-12-22 08:17:40,936 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:17:40,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:17:40,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:17:40,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:17:40,937 INFO L87 Difference]: Start difference. First operand 13368 states and 18741 transitions. Second operand 3 states. [2020-12-22 08:17:44,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:17:44,689 INFO L93 Difference]: Finished difference Result 24740 states and 34809 transitions. [2020-12-22 08:17:44,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:17:44,690 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 63 [2020-12-22 08:17:44,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:17:44,709 INFO L225 Difference]: With dead ends: 24740 [2020-12-22 08:17:44,709 INFO L226 Difference]: Without dead ends: 19617 [2020-12-22 08:17:44,714 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 08:17:44,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19617 states. [2020-12-22 08:17:47,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19617 to 13262. [2020-12-22 08:17:47,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13262 states. [2020-12-22 08:17:47,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13262 states to 13262 states and 18567 transitions. [2020-12-22 08:17:47,043 INFO L78 Accepts]: Start accepts. Automaton has 13262 states and 18567 transitions. Word has length 63 [2020-12-22 08:17:47,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:17:47,043 INFO L481 AbstractCegarLoop]: Abstraction has 13262 states and 18567 transitions. [2020-12-22 08:17:47,044 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:17:47,044 INFO L276 IsEmpty]: Start isEmpty. Operand 13262 states and 18567 transitions. [2020-12-22 08:17:47,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-22 08:17:47,046 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:17:47,047 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] [2020-12-22 08:17:47,047 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-12-22 08:17:47,047 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:17:47,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:17:47,047 INFO L82 PathProgramCache]: Analyzing trace with hash 296287221, now seen corresponding path program 1 times [2020-12-22 08:17:47,048 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:17:47,048 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337504128] [2020-12-22 08:17:47,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:17:47,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:17:48,100 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 08:17:48,100 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337504128] [2020-12-22 08:17:48,101 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:17:48,101 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2020-12-22 08:17:48,101 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728680144] [2020-12-22 08:17:48,101 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-22 08:17:48,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:17:48,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-22 08:17:48,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=447, Unknown=0, NotChecked=0, Total=506 [2020-12-22 08:17:48,103 INFO L87 Difference]: Start difference. First operand 13262 states and 18567 transitions. Second operand 23 states. [2020-12-22 08:17:48,380 WARN L197 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 84 [2020-12-22 08:17:49,409 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 49 [2020-12-22 08:17:49,726 WARN L197 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 59 [2020-12-22 08:17:49,988 WARN L197 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 74 [2020-12-22 08:17:50,495 WARN L197 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 89 [2020-12-22 08:17:50,847 WARN L197 SmtUtils]: Spent 305.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 97 [2020-12-22 08:17:51,031 WARN L197 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2020-12-22 08:17:51,275 WARN L197 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2020-12-22 08:17:51,868 WARN L197 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 47 [2020-12-22 08:17:52,428 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2020-12-22 08:18:06,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:18:06,515 INFO L93 Difference]: Finished difference Result 47783 states and 67546 transitions. [2020-12-22 08:18:06,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-12-22 08:18:06,520 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 63 [2020-12-22 08:18:06,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:18:06,578 INFO L225 Difference]: With dead ends: 47783 [2020-12-22 08:18:06,579 INFO L226 Difference]: Without dead ends: 47041 [2020-12-22 08:18:06,588 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 535 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=469, Invalid=2287, Unknown=0, NotChecked=0, Total=2756 [2020-12-22 08:18:06,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47041 states. [2020-12-22 08:18:09,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47041 to 13262. [2020-12-22 08:18:09,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13262 states. [2020-12-22 08:18:09,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13262 states to 13262 states and 18566 transitions. [2020-12-22 08:18:09,486 INFO L78 Accepts]: Start accepts. Automaton has 13262 states and 18566 transitions. Word has length 63 [2020-12-22 08:18:09,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:18:09,486 INFO L481 AbstractCegarLoop]: Abstraction has 13262 states and 18566 transitions. [2020-12-22 08:18:09,486 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-22 08:18:09,486 INFO L276 IsEmpty]: Start isEmpty. Operand 13262 states and 18566 transitions. [2020-12-22 08:18:09,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-22 08:18:09,489 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:18:09,489 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] [2020-12-22 08:18:09,489 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-12-22 08:18:09,490 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:18:09,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:18:09,490 INFO L82 PathProgramCache]: Analyzing trace with hash -678356547, now seen corresponding path program 1 times [2020-12-22 08:18:09,490 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:18:09,490 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400303726] [2020-12-22 08:18:09,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:18:09,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:18:10,591 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 08:18:10,592 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400303726] [2020-12-22 08:18:10,592 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:18:10,592 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2020-12-22 08:18:10,592 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093218350] [2020-12-22 08:18:10,593 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-22 08:18:10,593 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:18:10,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-22 08:18:10,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=454, Unknown=0, NotChecked=0, Total=506 [2020-12-22 08:18:10,594 INFO L87 Difference]: Start difference. First operand 13262 states and 18566 transitions. Second operand 23 states. [2020-12-22 08:18:10,965 WARN L197 SmtUtils]: Spent 327.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 84 [2020-12-22 08:18:11,986 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 34 [2020-12-22 08:18:12,187 WARN L197 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 52 [2020-12-22 08:18:12,632 WARN L197 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 68 [2020-12-22 08:18:12,968 WARN L197 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 79 [2020-12-22 08:18:13,570 WARN L197 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 88 [2020-12-22 08:18:14,004 WARN L197 SmtUtils]: Spent 366.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 96 [2020-12-22 08:18:14,211 WARN L197 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 52 [2020-12-22 08:18:14,515 WARN L197 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 52 [2020-12-22 08:18:14,959 WARN L197 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 50 [2020-12-22 08:18:15,267 WARN L197 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 52 [2020-12-22 08:18:15,610 WARN L197 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 48 [2020-12-22 08:18:16,004 WARN L197 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 45 [2020-12-22 08:18:16,401 WARN L197 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 44 [2020-12-22 08:18:16,720 WARN L197 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 36 [2020-12-22 08:18:20,006 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 32 [2020-12-22 08:18:33,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:18:33,829 INFO L93 Difference]: Finished difference Result 58128 states and 82232 transitions. [2020-12-22 08:18:33,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-12-22 08:18:33,830 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 63 [2020-12-22 08:18:33,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:18:33,900 INFO L225 Difference]: With dead ends: 58128 [2020-12-22 08:18:33,900 INFO L226 Difference]: Without dead ends: 57386 [2020-12-22 08:18:33,913 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 372 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=484, Invalid=2066, Unknown=0, NotChecked=0, Total=2550 [2020-12-22 08:18:33,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57386 states. [2020-12-22 08:18:37,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57386 to 13243. [2020-12-22 08:18:37,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13243 states. [2020-12-22 08:18:37,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13243 states to 13243 states and 18539 transitions. [2020-12-22 08:18:37,097 INFO L78 Accepts]: Start accepts. Automaton has 13243 states and 18539 transitions. Word has length 63 [2020-12-22 08:18:37,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:18:37,097 INFO L481 AbstractCegarLoop]: Abstraction has 13243 states and 18539 transitions. [2020-12-22 08:18:37,097 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-22 08:18:37,097 INFO L276 IsEmpty]: Start isEmpty. Operand 13243 states and 18539 transitions. [2020-12-22 08:18:37,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-22 08:18:37,100 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:18:37,101 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] [2020-12-22 08:18:37,101 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-12-22 08:18:37,101 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:18:37,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:18:37,101 INFO L82 PathProgramCache]: Analyzing trace with hash 639398585, now seen corresponding path program 1 times [2020-12-22 08:18:37,102 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:18:37,102 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489271041] [2020-12-22 08:18:37,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:18:37,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:18:38,167 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 08:18:38,167 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489271041] [2020-12-22 08:18:38,168 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:18:38,168 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2020-12-22 08:18:38,168 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214467842] [2020-12-22 08:18:38,168 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-22 08:18:38,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:18:38,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-22 08:18:38,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=450, Unknown=0, NotChecked=0, Total=506 [2020-12-22 08:18:38,169 INFO L87 Difference]: Start difference. First operand 13243 states and 18539 transitions. Second operand 23 states. [2020-12-22 08:18:38,482 WARN L197 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 92 [2020-12-22 08:18:39,127 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 36 [2020-12-22 08:18:39,342 WARN L197 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 56 [2020-12-22 08:18:39,786 WARN L197 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 64 [2020-12-22 08:18:40,091 WARN L197 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 77 [2020-12-22 08:18:40,673 WARN L197 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 90 [2020-12-22 08:18:41,048 WARN L197 SmtUtils]: Spent 319.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 101 [2020-12-22 08:18:41,255 WARN L197 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 52 [2020-12-22 08:18:41,541 WARN L197 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 52 [2020-12-22 08:18:41,966 WARN L197 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 49 [2020-12-22 08:18:42,258 WARN L197 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 51 [2020-12-22 08:18:42,596 WARN L197 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 47 [2020-12-22 08:18:43,956 WARN L197 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 36 [2020-12-22 08:18:49,357 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 32 [2020-12-22 08:19:01,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:19:01,672 INFO L93 Difference]: Finished difference Result 52108 states and 73752 transitions. [2020-12-22 08:19:01,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-12-22 08:19:01,673 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 63 [2020-12-22 08:19:01,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:19:01,738 INFO L225 Difference]: With dead ends: 52108 [2020-12-22 08:19:01,738 INFO L226 Difference]: Without dead ends: 51366 [2020-12-22 08:19:01,751 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=348, Invalid=1722, Unknown=0, NotChecked=0, Total=2070 [2020-12-22 08:19:01,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51366 states. [2020-12-22 08:19:05,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51366 to 13224. [2020-12-22 08:19:05,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13224 states. [2020-12-22 08:19:05,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13224 states to 13224 states and 18512 transitions. [2020-12-22 08:19:05,230 INFO L78 Accepts]: Start accepts. Automaton has 13224 states and 18512 transitions. Word has length 63 [2020-12-22 08:19:05,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:19:05,231 INFO L481 AbstractCegarLoop]: Abstraction has 13224 states and 18512 transitions. [2020-12-22 08:19:05,231 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-22 08:19:05,231 INFO L276 IsEmpty]: Start isEmpty. Operand 13224 states and 18512 transitions. [2020-12-22 08:19:05,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-22 08:19:05,233 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:19:05,233 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] [2020-12-22 08:19:05,233 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-12-22 08:19:05,234 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:19:05,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:19:05,234 INFO L82 PathProgramCache]: Analyzing trace with hash -422382988, now seen corresponding path program 1 times [2020-12-22 08:19:05,234 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:19:05,234 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035011180] [2020-12-22 08:19:05,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:19:05,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:19:05,267 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 08:19:05,267 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035011180] [2020-12-22 08:19:05,267 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:19:05,267 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:19:05,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056917117] [2020-12-22 08:19:05,268 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:19:05,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:19:05,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:19:05,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:19:05,269 INFO L87 Difference]: Start difference. First operand 13224 states and 18512 transitions. Second operand 3 states. [2020-12-22 08:19:10,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:19:10,622 INFO L93 Difference]: Finished difference Result 24427 states and 34336 transitions. [2020-12-22 08:19:10,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:19:10,623 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 63 [2020-12-22 08:19:10,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:19:10,643 INFO L225 Difference]: With dead ends: 24427 [2020-12-22 08:19:10,643 INFO L226 Difference]: Without dead ends: 19349 [2020-12-22 08:19:10,650 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 08:19:10,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19349 states. [2020-12-22 08:19:14,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19349 to 12994. [2020-12-22 08:19:14,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12994 states. [2020-12-22 08:19:14,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12994 states to 12994 states and 18173 transitions. [2020-12-22 08:19:14,300 INFO L78 Accepts]: Start accepts. Automaton has 12994 states and 18173 transitions. Word has length 63 [2020-12-22 08:19:14,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:19:14,300 INFO L481 AbstractCegarLoop]: Abstraction has 12994 states and 18173 transitions. [2020-12-22 08:19:14,300 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:19:14,300 INFO L276 IsEmpty]: Start isEmpty. Operand 12994 states and 18173 transitions. [2020-12-22 08:19:14,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-22 08:19:14,303 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:19:14,303 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] [2020-12-22 08:19:14,303 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-12-22 08:19:14,304 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:19:14,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:19:14,304 INFO L82 PathProgramCache]: Analyzing trace with hash 393964366, now seen corresponding path program 1 times [2020-12-22 08:19:14,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:19:14,304 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020067038] [2020-12-22 08:19:14,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:19:14,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:19:14,338 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 08:19:14,339 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020067038] [2020-12-22 08:19:14,339 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:19:14,339 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:19:14,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081423981] [2020-12-22 08:19:14,340 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:19:14,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:19:14,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:19:14,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:19:14,341 INFO L87 Difference]: Start difference. First operand 12994 states and 18173 transitions. Second operand 3 states. [2020-12-22 08:19:18,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:19:18,549 INFO L93 Difference]: Finished difference Result 19623 states and 27446 transitions. [2020-12-22 08:19:18,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:19:18,550 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 63 [2020-12-22 08:19:18,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:19:18,568 INFO L225 Difference]: With dead ends: 19623 [2020-12-22 08:19:18,569 INFO L226 Difference]: Without dead ends: 15614 [2020-12-22 08:19:18,576 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 08:19:18,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15614 states. [2020-12-22 08:19:21,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15614 to 12599. [2020-12-22 08:19:21,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12599 states. [2020-12-22 08:19:21,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12599 states to 12599 states and 17621 transitions. [2020-12-22 08:19:21,951 INFO L78 Accepts]: Start accepts. Automaton has 12599 states and 17621 transitions. Word has length 63 [2020-12-22 08:19:21,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:19:21,951 INFO L481 AbstractCegarLoop]: Abstraction has 12599 states and 17621 transitions. [2020-12-22 08:19:21,951 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:19:21,951 INFO L276 IsEmpty]: Start isEmpty. Operand 12599 states and 17621 transitions. [2020-12-22 08:19:21,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 08:19:21,953 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:19:21,953 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] [2020-12-22 08:19:21,953 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-12-22 08:19:21,954 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:19:21,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:19:21,954 INFO L82 PathProgramCache]: Analyzing trace with hash 1222962444, now seen corresponding path program 1 times [2020-12-22 08:19:21,954 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:19:21,954 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736826392] [2020-12-22 08:19:21,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:19:21,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:19:22,406 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 08:19:22,406 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736826392] [2020-12-22 08:19:22,406 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:19:22,407 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-12-22 08:19:22,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020541528] [2020-12-22 08:19:22,407 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-22 08:19:22,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:19:22,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-22 08:19:22,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2020-12-22 08:19:22,408 INFO L87 Difference]: Start difference. First operand 12599 states and 17621 transitions. Second operand 12 states. [2020-12-22 08:19:22,822 WARN L197 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 37 [2020-12-22 08:19:23,022 WARN L197 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 43 [2020-12-22 08:19:23,244 WARN L197 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 43 [2020-12-22 08:19:23,477 WARN L197 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 43 [2020-12-22 08:19:23,793 WARN L197 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2020-12-22 08:19:24,103 WARN L197 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 40 [2020-12-22 08:19:34,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:19:34,086 INFO L93 Difference]: Finished difference Result 32441 states and 45594 transitions. [2020-12-22 08:19:34,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-22 08:19:34,086 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 64 [2020-12-22 08:19:34,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:19:34,119 INFO L225 Difference]: With dead ends: 32441 [2020-12-22 08:19:34,119 INFO L226 Difference]: Without dead ends: 30217 [2020-12-22 08:19:34,127 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=144, Invalid=456, Unknown=0, NotChecked=0, Total=600 [2020-12-22 08:19:34,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30217 states. [2020-12-22 08:19:38,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30217 to 12490. [2020-12-22 08:19:38,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12490 states. [2020-12-22 08:19:38,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12490 states to 12490 states and 17464 transitions. [2020-12-22 08:19:38,114 INFO L78 Accepts]: Start accepts. Automaton has 12490 states and 17464 transitions. Word has length 64 [2020-12-22 08:19:38,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:19:38,114 INFO L481 AbstractCegarLoop]: Abstraction has 12490 states and 17464 transitions. [2020-12-22 08:19:38,114 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-22 08:19:38,114 INFO L276 IsEmpty]: Start isEmpty. Operand 12490 states and 17464 transitions. [2020-12-22 08:19:38,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 08:19:38,116 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:19:38,116 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] [2020-12-22 08:19:38,117 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-12-22 08:19:38,117 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:19:38,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:19:38,117 INFO L82 PathProgramCache]: Analyzing trace with hash 1280220746, now seen corresponding path program 1 times [2020-12-22 08:19:38,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:19:38,117 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995150044] [2020-12-22 08:19:38,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:19:38,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:19:39,180 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 08:19:39,180 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995150044] [2020-12-22 08:19:39,180 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:19:39,181 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2020-12-22 08:19:39,181 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696029025] [2020-12-22 08:19:39,181 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-22 08:19:39,181 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:19:39,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-22 08:19:39,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2020-12-22 08:19:39,182 INFO L87 Difference]: Start difference. First operand 12490 states and 17464 transitions. Second operand 18 states. [2020-12-22 08:19:39,424 WARN L197 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2020-12-22 08:19:39,721 WARN L197 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 31 [2020-12-22 08:19:39,892 WARN L197 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 33 [2020-12-22 08:19:40,120 WARN L197 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 34 [2020-12-22 08:19:40,411 WARN L197 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 40 [2020-12-22 08:19:40,821 WARN L197 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 49 [2020-12-22 08:19:41,173 WARN L197 SmtUtils]: Spent 315.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 53 [2020-12-22 08:19:41,790 WARN L197 SmtUtils]: Spent 478.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 72 [2020-12-22 08:19:42,398 WARN L197 SmtUtils]: Spent 560.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 83 [2020-12-22 08:19:42,798 WARN L197 SmtUtils]: Spent 356.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 61 [2020-12-22 08:19:42,980 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 37 [2020-12-22 08:19:43,380 WARN L197 SmtUtils]: Spent 359.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 61 [2020-12-22 08:19:43,715 WARN L197 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 49 [2020-12-22 08:19:44,222 WARN L197 SmtUtils]: Spent 327.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 58 [2020-12-22 08:19:44,488 WARN L197 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 49 [2020-12-22 08:19:44,926 WARN L197 SmtUtils]: Spent 401.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 62 [2020-12-22 08:19:45,110 WARN L197 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 46 [2020-12-22 08:19:45,612 WARN L197 SmtUtils]: Spent 349.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2020-12-22 08:19:45,992 WARN L197 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 62 [2020-12-22 08:19:46,256 WARN L197 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 58 [2020-12-22 08:19:46,431 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2020-12-22 08:19:46,570 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 32 [2020-12-22 08:19:46,910 WARN L197 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 53 [2020-12-22 08:19:47,327 WARN L197 SmtUtils]: Spent 355.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 53 [2020-12-22 08:19:47,702 WARN L197 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2020-12-22 08:19:48,161 WARN L197 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 47 [2020-12-22 08:19:48,675 WARN L197 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 36 [2020-12-22 08:19:49,991 WARN L197 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 44 [2020-12-22 08:19:51,351 WARN L197 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2020-12-22 08:20:00,353 WARN L197 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 33 [2020-12-22 08:20:03,116 WARN L197 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 49