/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.3.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 08:04:16,096 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 08:04:16,099 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 08:04:16,133 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 08:04:16,133 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 08:04:16,135 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 08:04:16,136 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 08:04:16,139 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 08:04:16,141 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 08:04:16,142 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 08:04:16,143 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 08:04:16,144 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 08:04:16,145 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 08:04:16,146 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 08:04:16,147 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 08:04:16,149 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 08:04:16,150 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 08:04:16,159 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 08:04:16,161 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 08:04:16,169 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 08:04:16,170 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 08:04:16,174 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 08:04:16,175 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 08:04:16,177 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 08:04:16,181 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 08:04:16,191 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 08:04:16,193 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 08:04:16,193 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 08:04:16,195 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 08:04:16,196 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 08:04:16,196 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 08:04:16,197 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 08:04:16,197 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 08:04:16,198 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 08:04:16,198 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 08:04:16,199 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 08:04:16,204 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 08:04:16,255 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 08:04:16,256 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 08:04:16,259 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 08:04:16,259 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 08:04:16,259 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 08:04:16,260 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 08:04:16,260 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 08:04:16,260 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 08:04:16,260 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 08:04:16,260 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 08:04:16,261 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 08:04:16,261 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 08:04:16,261 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 08:04:16,261 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 08:04:16,261 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 08:04:16,262 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 08:04:16,262 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 08:04:16,263 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 08:04:16,264 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 08:04:16,264 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 08:04:16,264 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 08:04:16,264 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 08:04:16,264 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 08:04:16,265 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 08:04:16,265 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 08:04:16,265 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 08:04:16,672 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 08:04:16,706 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 08:04:16,710 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 08:04:16,712 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 08:04:16,712 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 08:04:16,713 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.3.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-12-22 08:04:16,795 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f57541fa9/ee3e87d97ba34d6ab5e36fb76f80bbed/FLAG5033a0fd2 [2020-12-22 08:04:17,511 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 08:04:17,512 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.3.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-12-22 08:04:17,525 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f57541fa9/ee3e87d97ba34d6ab5e36fb76f80bbed/FLAG5033a0fd2 [2020-12-22 08:04:17,844 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f57541fa9/ee3e87d97ba34d6ab5e36fb76f80bbed [2020-12-22 08:04:17,849 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 08:04:17,851 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 08:04:17,854 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 08:04:17,854 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 08:04:17,858 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 08:04:17,858 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 08:04:17" (1/1) ... [2020-12-22 08:04:17,861 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3eaa3684 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:04:17, skipping insertion in model container [2020-12-22 08:04:17,861 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 08:04:17" (1/1) ... [2020-12-22 08:04:17,869 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 08:04:17,931 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 08:04:18,141 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.3.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[6945,6958] [2020-12-22 08:04:18,181 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 08:04:18,196 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 08:04:18,266 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.3.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[6945,6958] [2020-12-22 08:04:18,293 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 08:04:18,318 INFO L208 MainTranslator]: Completed translation [2020-12-22 08:04:18,318 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:04:18 WrapperNode [2020-12-22 08:04:18,319 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 08:04:18,320 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 08:04:18,320 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 08:04:18,321 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 08:04:18,330 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:04:18" (1/1) ... [2020-12-22 08:04:18,343 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:04:18" (1/1) ... [2020-12-22 08:04:18,406 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 08:04:18,407 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 08:04:18,407 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 08:04:18,408 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 08:04:18,421 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:04:18" (1/1) ... [2020-12-22 08:04:18,421 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:04:18" (1/1) ... [2020-12-22 08:04:18,437 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:04:18" (1/1) ... [2020-12-22 08:04:18,440 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:04:18" (1/1) ... [2020-12-22 08:04:18,463 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:04:18" (1/1) ... [2020-12-22 08:04:18,480 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:04:18" (1/1) ... [2020-12-22 08:04:18,487 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:04:18" (1/1) ... [2020-12-22 08:04:18,497 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 08:04:18,501 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 08:04:18,501 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 08:04:18,501 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 08:04:18,505 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:04:18" (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 08:04:18,620 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 08:04:18,621 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 08:04:18,621 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 08:04:18,621 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 08:04:19,589 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 08:04:19,590 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2020-12-22 08:04:19,591 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 08:04:19 BoogieIcfgContainer [2020-12-22 08:04:19,592 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 08:04:19,594 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 08:04:19,594 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 08:04:19,598 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 08:04:19,598 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 08:04:17" (1/3) ... [2020-12-22 08:04:19,599 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1dbec5f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 08:04:19, skipping insertion in model container [2020-12-22 08:04:19,599 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:04:18" (2/3) ... [2020-12-22 08:04:19,600 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1dbec5f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 08:04:19, skipping insertion in model container [2020-12-22 08:04:19,600 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 08:04:19" (3/3) ... [2020-12-22 08:04:19,601 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_floodmax.3.3.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-12-22 08:04:19,608 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 08:04:19,613 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 08:04:19,632 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 08:04:19,660 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 08:04:19,660 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 08:04:19,660 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 08:04:19,660 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 08:04:19,660 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 08:04:19,661 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 08:04:19,661 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 08:04:19,661 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 08:04:19,679 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states. [2020-12-22 08:04:19,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-12-22 08:04:19,690 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:04:19,691 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] [2020-12-22 08:04:19,691 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:04:19,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:04:19,698 INFO L82 PathProgramCache]: Analyzing trace with hash -1890044597, now seen corresponding path program 1 times [2020-12-22 08:04:19,708 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:04:19,708 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105893569] [2020-12-22 08:04:19,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:04:19,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:04:20,094 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 08:04:20,095 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105893569] [2020-12-22 08:04:20,096 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:04:20,097 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:04:20,098 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267902721] [2020-12-22 08:04:20,103 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:04:20,103 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:04:20,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:04:20,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:04:20,122 INFO L87 Difference]: Start difference. First operand 140 states. Second operand 3 states. [2020-12-22 08:04:20,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:04:20,307 INFO L93 Difference]: Finished difference Result 303 states and 512 transitions. [2020-12-22 08:04:20,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:04:20,309 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 56 [2020-12-22 08:04:20,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:04:20,324 INFO L225 Difference]: With dead ends: 303 [2020-12-22 08:04:20,324 INFO L226 Difference]: Without dead ends: 211 [2020-12-22 08:04:20,328 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 08:04:20,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2020-12-22 08:04:20,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 208. [2020-12-22 08:04:20,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2020-12-22 08:04:20,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 327 transitions. [2020-12-22 08:04:20,400 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 327 transitions. Word has length 56 [2020-12-22 08:04:20,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:04:20,401 INFO L481 AbstractCegarLoop]: Abstraction has 208 states and 327 transitions. [2020-12-22 08:04:20,401 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:04:20,401 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 327 transitions. [2020-12-22 08:04:20,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-12-22 08:04:20,404 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:04:20,405 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 08:04:20,405 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 08:04:20,405 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:04:20,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:04:20,407 INFO L82 PathProgramCache]: Analyzing trace with hash -1610685192, now seen corresponding path program 1 times [2020-12-22 08:04:20,407 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:04:20,407 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702981403] [2020-12-22 08:04:20,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:04:20,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:04:20,550 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 08:04:20,551 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702981403] [2020-12-22 08:04:20,551 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:04:20,551 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:04:20,551 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952887340] [2020-12-22 08:04:20,553 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:04:20,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:04:20,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:04:20,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:04:20,555 INFO L87 Difference]: Start difference. First operand 208 states and 327 transitions. Second operand 3 states. [2020-12-22 08:04:20,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:04:20,641 INFO L93 Difference]: Finished difference Result 502 states and 811 transitions. [2020-12-22 08:04:20,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:04:20,642 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 58 [2020-12-22 08:04:20,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:04:20,646 INFO L225 Difference]: With dead ends: 502 [2020-12-22 08:04:20,646 INFO L226 Difference]: Without dead ends: 348 [2020-12-22 08:04:20,648 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 08:04:20,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2020-12-22 08:04:20,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 344. [2020-12-22 08:04:20,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 344 states. [2020-12-22 08:04:20,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 549 transitions. [2020-12-22 08:04:20,692 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 549 transitions. Word has length 58 [2020-12-22 08:04:20,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:04:20,692 INFO L481 AbstractCegarLoop]: Abstraction has 344 states and 549 transitions. [2020-12-22 08:04:20,693 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:04:20,693 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 549 transitions. [2020-12-22 08:04:20,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-12-22 08:04:20,696 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:04:20,697 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] [2020-12-22 08:04:20,697 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 08:04:20,697 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:04:20,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:04:20,698 INFO L82 PathProgramCache]: Analyzing trace with hash 1017067947, now seen corresponding path program 1 times [2020-12-22 08:04:20,698 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:04:20,699 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926035239] [2020-12-22 08:04:20,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:04:20,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:04:20,878 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 08:04:20,879 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926035239] [2020-12-22 08:04:20,879 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:04:20,879 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:04:20,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168950677] [2020-12-22 08:04:20,880 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:04:20,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:04:20,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:04:20,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:04:20,882 INFO L87 Difference]: Start difference. First operand 344 states and 549 transitions. Second operand 3 states. [2020-12-22 08:04:20,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:04:20,964 INFO L93 Difference]: Finished difference Result 896 states and 1451 transitions. [2020-12-22 08:04:20,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:04:20,965 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 60 [2020-12-22 08:04:20,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:04:20,969 INFO L225 Difference]: With dead ends: 896 [2020-12-22 08:04:20,969 INFO L226 Difference]: Without dead ends: 606 [2020-12-22 08:04:20,971 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 08:04:20,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 606 states. [2020-12-22 08:04:21,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 606 to 600. [2020-12-22 08:04:21,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 600 states. [2020-12-22 08:04:21,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 600 states to 600 states and 961 transitions. [2020-12-22 08:04:21,037 INFO L78 Accepts]: Start accepts. Automaton has 600 states and 961 transitions. Word has length 60 [2020-12-22 08:04:21,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:04:21,043 INFO L481 AbstractCegarLoop]: Abstraction has 600 states and 961 transitions. [2020-12-22 08:04:21,044 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:04:21,044 INFO L276 IsEmpty]: Start isEmpty. Operand 600 states and 961 transitions. [2020-12-22 08:04:21,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-12-22 08:04:21,049 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:04:21,049 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 08:04:21,054 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 08:04:21,054 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:04:21,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:04:21,055 INFO L82 PathProgramCache]: Analyzing trace with hash 291448600, now seen corresponding path program 1 times [2020-12-22 08:04:21,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:04:21,056 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299410948] [2020-12-22 08:04:21,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:04:21,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:04:21,259 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 08:04:21,259 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299410948] [2020-12-22 08:04:21,260 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:04:21,261 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 08:04:21,261 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749755598] [2020-12-22 08:04:21,262 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 08:04:21,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:04:21,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 08:04:21,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:04:21,267 INFO L87 Difference]: Start difference. First operand 600 states and 961 transitions. Second operand 5 states. [2020-12-22 08:04:21,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:04:21,551 INFO L93 Difference]: Finished difference Result 2148 states and 3509 transitions. [2020-12-22 08:04:21,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 08:04:21,552 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 62 [2020-12-22 08:04:21,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:04:21,563 INFO L225 Difference]: With dead ends: 2148 [2020-12-22 08:04:21,563 INFO L226 Difference]: Without dead ends: 1602 [2020-12-22 08:04:21,565 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 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 08:04:21,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1602 states. [2020-12-22 08:04:21,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1602 to 1089. [2020-12-22 08:04:21,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1089 states. [2020-12-22 08:04:21,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1089 states to 1089 states and 1754 transitions. [2020-12-22 08:04:21,648 INFO L78 Accepts]: Start accepts. Automaton has 1089 states and 1754 transitions. Word has length 62 [2020-12-22 08:04:21,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:04:21,651 INFO L481 AbstractCegarLoop]: Abstraction has 1089 states and 1754 transitions. [2020-12-22 08:04:21,651 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 08:04:21,651 INFO L276 IsEmpty]: Start isEmpty. Operand 1089 states and 1754 transitions. [2020-12-22 08:04:21,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-22 08:04:21,655 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:04:21,656 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 08:04:21,656 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 08:04:21,656 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:04:21,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:04:21,657 INFO L82 PathProgramCache]: Analyzing trace with hash 382467820, now seen corresponding path program 1 times [2020-12-22 08:04:21,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:04:21,657 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808647969] [2020-12-22 08:04:21,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:04:21,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:04:21,786 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 08:04:21,787 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808647969] [2020-12-22 08:04:21,787 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:04:21,787 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 08:04:21,788 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101259476] [2020-12-22 08:04:21,789 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 08:04:21,789 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:04:21,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 08:04:21,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 08:04:21,792 INFO L87 Difference]: Start difference. First operand 1089 states and 1754 transitions. Second operand 4 states. [2020-12-22 08:04:22,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:04:22,014 INFO L93 Difference]: Finished difference Result 2874 states and 4692 transitions. [2020-12-22 08:04:22,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 08:04:22,015 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 63 [2020-12-22 08:04:22,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:04:22,026 INFO L225 Difference]: With dead ends: 2874 [2020-12-22 08:04:22,027 INFO L226 Difference]: Without dead ends: 1839 [2020-12-22 08:04:22,049 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 08:04:22,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1839 states. [2020-12-22 08:04:22,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1839 to 1601. [2020-12-22 08:04:22,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1601 states. [2020-12-22 08:04:22,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1601 states to 1601 states and 2595 transitions. [2020-12-22 08:04:22,173 INFO L78 Accepts]: Start accepts. Automaton has 1601 states and 2595 transitions. Word has length 63 [2020-12-22 08:04:22,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:04:22,175 INFO L481 AbstractCegarLoop]: Abstraction has 1601 states and 2595 transitions. [2020-12-22 08:04:22,175 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 08:04:22,175 INFO L276 IsEmpty]: Start isEmpty. Operand 1601 states and 2595 transitions. [2020-12-22 08:04:22,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 08:04:22,177 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:04:22,177 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 08:04:22,177 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 08:04:22,177 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:04:22,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:04:22,178 INFO L82 PathProgramCache]: Analyzing trace with hash -1086345633, now seen corresponding path program 1 times [2020-12-22 08:04:22,178 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:04:22,178 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731730627] [2020-12-22 08:04:22,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:04:22,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:04:22,275 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 08:04:22,276 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731730627] [2020-12-22 08:04:22,276 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:04:22,276 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 08:04:22,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835970337] [2020-12-22 08:04:22,277 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 08:04:22,278 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:04:22,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 08:04:22,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 08:04:22,279 INFO L87 Difference]: Start difference. First operand 1601 states and 2595 transitions. Second operand 4 states. [2020-12-22 08:04:22,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:04:22,597 INFO L93 Difference]: Finished difference Result 4202 states and 6864 transitions. [2020-12-22 08:04:22,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 08:04:22,598 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 64 [2020-12-22 08:04:22,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:04:22,612 INFO L225 Difference]: With dead ends: 4202 [2020-12-22 08:04:22,612 INFO L226 Difference]: Without dead ends: 2655 [2020-12-22 08:04:22,614 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:04:22,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2655 states. [2020-12-22 08:04:22,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2655 to 2336. [2020-12-22 08:04:22,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2336 states. [2020-12-22 08:04:22,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2336 states to 2336 states and 3787 transitions. [2020-12-22 08:04:22,781 INFO L78 Accepts]: Start accepts. Automaton has 2336 states and 3787 transitions. Word has length 64 [2020-12-22 08:04:22,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:04:22,781 INFO L481 AbstractCegarLoop]: Abstraction has 2336 states and 3787 transitions. [2020-12-22 08:04:22,781 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 08:04:22,781 INFO L276 IsEmpty]: Start isEmpty. Operand 2336 states and 3787 transitions. [2020-12-22 08:04:22,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-12-22 08:04:22,783 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:04:22,784 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:04:22,784 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 08:04:22,784 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:04:22,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:04:22,785 INFO L82 PathProgramCache]: Analyzing trace with hash 1879078355, now seen corresponding path program 1 times [2020-12-22 08:04:22,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:04:22,785 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57827278] [2020-12-22 08:04:22,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:04:22,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:04:22,835 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 08:04:22,836 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57827278] [2020-12-22 08:04:22,836 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:04:22,836 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:04:22,837 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455565451] [2020-12-22 08:04:22,837 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:04:22,837 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:04:22,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:04:22,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:04:22,838 INFO L87 Difference]: Start difference. First operand 2336 states and 3787 transitions. Second operand 3 states. [2020-12-22 08:04:23,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:04:23,139 INFO L93 Difference]: Finished difference Result 5150 states and 8392 transitions. [2020-12-22 08:04:23,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:04:23,140 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 65 [2020-12-22 08:04:23,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:04:23,159 INFO L225 Difference]: With dead ends: 5150 [2020-12-22 08:04:23,160 INFO L226 Difference]: Without dead ends: 3529 [2020-12-22 08:04:23,167 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 08:04:23,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3529 states. [2020-12-22 08:04:23,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3529 to 3527. [2020-12-22 08:04:23,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3527 states. [2020-12-22 08:04:23,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3527 states to 3527 states and 5708 transitions. [2020-12-22 08:04:23,416 INFO L78 Accepts]: Start accepts. Automaton has 3527 states and 5708 transitions. Word has length 65 [2020-12-22 08:04:23,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:04:23,416 INFO L481 AbstractCegarLoop]: Abstraction has 3527 states and 5708 transitions. [2020-12-22 08:04:23,416 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:04:23,416 INFO L276 IsEmpty]: Start isEmpty. Operand 3527 states and 5708 transitions. [2020-12-22 08:04:23,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-12-22 08:04:23,417 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:04:23,418 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:04:23,418 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 08:04:23,418 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:04:23,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:04:23,419 INFO L82 PathProgramCache]: Analyzing trace with hash -450865020, now seen corresponding path program 1 times [2020-12-22 08:04:23,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:04:23,419 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384922506] [2020-12-22 08:04:23,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:04:23,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:04:23,476 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 08:04:23,476 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384922506] [2020-12-22 08:04:23,477 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:04:23,477 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:04:23,477 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714864462] [2020-12-22 08:04:23,478 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:04:23,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:04:23,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:04:23,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:04:23,495 INFO L87 Difference]: Start difference. First operand 3527 states and 5708 transitions. Second operand 3 states. [2020-12-22 08:04:23,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:04:23,796 INFO L93 Difference]: Finished difference Result 6985 states and 11358 transitions. [2020-12-22 08:04:23,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:04:23,797 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 65 [2020-12-22 08:04:23,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:04:23,822 INFO L225 Difference]: With dead ends: 6985 [2020-12-22 08:04:23,822 INFO L226 Difference]: Without dead ends: 4965 [2020-12-22 08:04:23,827 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 08:04:23,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4965 states. [2020-12-22 08:04:24,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4965 to 4963. [2020-12-22 08:04:24,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4963 states. [2020-12-22 08:04:24,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4963 states to 4963 states and 8011 transitions. [2020-12-22 08:04:24,183 INFO L78 Accepts]: Start accepts. Automaton has 4963 states and 8011 transitions. Word has length 65 [2020-12-22 08:04:24,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:04:24,184 INFO L481 AbstractCegarLoop]: Abstraction has 4963 states and 8011 transitions. [2020-12-22 08:04:24,184 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:04:24,184 INFO L276 IsEmpty]: Start isEmpty. Operand 4963 states and 8011 transitions. [2020-12-22 08:04:24,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-12-22 08:04:24,191 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:04:24,191 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:04:24,191 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 08:04:24,191 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:04:24,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:04:24,193 INFO L82 PathProgramCache]: Analyzing trace with hash 629635603, now seen corresponding path program 1 times [2020-12-22 08:04:24,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:04:24,193 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183269017] [2020-12-22 08:04:24,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:04:24,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:04:24,277 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 08:04:24,282 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183269017] [2020-12-22 08:04:24,282 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:04:24,282 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 08:04:24,282 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47483402] [2020-12-22 08:04:24,283 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 08:04:24,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:04:24,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 08:04:24,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 08:04:24,289 INFO L87 Difference]: Start difference. First operand 4963 states and 8011 transitions. Second operand 4 states. [2020-12-22 08:04:24,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:04:24,932 INFO L93 Difference]: Finished difference Result 13573 states and 22049 transitions. [2020-12-22 08:04:24,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 08:04:24,933 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 65 [2020-12-22 08:04:24,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:04:24,999 INFO L225 Difference]: With dead ends: 13573 [2020-12-22 08:04:24,999 INFO L226 Difference]: Without dead ends: 8744 [2020-12-22 08:04:25,007 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 08:04:25,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8744 states. [2020-12-22 08:04:25,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8744 to 7677. [2020-12-22 08:04:25,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7677 states. [2020-12-22 08:04:25,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7677 states to 7677 states and 12369 transitions. [2020-12-22 08:04:25,612 INFO L78 Accepts]: Start accepts. Automaton has 7677 states and 12369 transitions. Word has length 65 [2020-12-22 08:04:25,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:04:25,612 INFO L481 AbstractCegarLoop]: Abstraction has 7677 states and 12369 transitions. [2020-12-22 08:04:25,612 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 08:04:25,613 INFO L276 IsEmpty]: Start isEmpty. Operand 7677 states and 12369 transitions. [2020-12-22 08:04:25,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-12-22 08:04:25,613 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:04:25,614 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:04:25,614 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 08:04:25,614 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:04:25,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:04:25,615 INFO L82 PathProgramCache]: Analyzing trace with hash -1768808302, now seen corresponding path program 1 times [2020-12-22 08:04:25,615 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:04:25,615 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424511416] [2020-12-22 08:04:25,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:04:25,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:04:25,675 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 08:04:25,675 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424511416] [2020-12-22 08:04:25,676 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:04:25,676 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:04:25,676 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181348354] [2020-12-22 08:04:25,677 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:04:25,677 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:04:25,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:04:25,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:04:25,679 INFO L87 Difference]: Start difference. First operand 7677 states and 12369 transitions. Second operand 3 states. [2020-12-22 08:04:26,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:04:26,352 INFO L93 Difference]: Finished difference Result 16751 states and 27364 transitions. [2020-12-22 08:04:26,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:04:26,353 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 65 [2020-12-22 08:04:26,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:04:26,386 INFO L225 Difference]: With dead ends: 16751 [2020-12-22 08:04:26,386 INFO L226 Difference]: Without dead ends: 11226 [2020-12-22 08:04:26,398 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 08:04:26,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11226 states. [2020-12-22 08:04:27,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11226 to 11224. [2020-12-22 08:04:27,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11224 states. [2020-12-22 08:04:27,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11224 states to 11224 states and 18145 transitions. [2020-12-22 08:04:27,129 INFO L78 Accepts]: Start accepts. Automaton has 11224 states and 18145 transitions. Word has length 65 [2020-12-22 08:04:27,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:04:27,129 INFO L481 AbstractCegarLoop]: Abstraction has 11224 states and 18145 transitions. [2020-12-22 08:04:27,130 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:04:27,130 INFO L276 IsEmpty]: Start isEmpty. Operand 11224 states and 18145 transitions. [2020-12-22 08:04:27,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-22 08:04:27,131 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:04:27,131 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:04:27,131 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 08:04:27,131 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:04:27,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:04:27,132 INFO L82 PathProgramCache]: Analyzing trace with hash -2027885532, now seen corresponding path program 1 times [2020-12-22 08:04:27,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:04:27,133 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756174044] [2020-12-22 08:04:27,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:04:27,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:04:27,320 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 08:04:27,320 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756174044] [2020-12-22 08:04:27,321 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:04:27,321 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 08:04:27,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753777291] [2020-12-22 08:04:27,322 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 08:04:27,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:04:27,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 08:04:27,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:04:27,323 INFO L87 Difference]: Start difference. First operand 11224 states and 18145 transitions. Second operand 5 states. [2020-12-22 08:04:28,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:04:28,449 INFO L93 Difference]: Finished difference Result 26414 states and 42938 transitions. [2020-12-22 08:04:28,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 08:04:28,449 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 67 [2020-12-22 08:04:28,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:04:28,491 INFO L225 Difference]: With dead ends: 26414 [2020-12-22 08:04:28,491 INFO L226 Difference]: Without dead ends: 15271 [2020-12-22 08:04:28,509 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 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 08:04:28,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15271 states. [2020-12-22 08:04:29,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15271 to 11224. [2020-12-22 08:04:29,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11224 states. [2020-12-22 08:04:29,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11224 states to 11224 states and 18020 transitions. [2020-12-22 08:04:29,323 INFO L78 Accepts]: Start accepts. Automaton has 11224 states and 18020 transitions. Word has length 67 [2020-12-22 08:04:29,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:04:29,323 INFO L481 AbstractCegarLoop]: Abstraction has 11224 states and 18020 transitions. [2020-12-22 08:04:29,323 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 08:04:29,323 INFO L276 IsEmpty]: Start isEmpty. Operand 11224 states and 18020 transitions. [2020-12-22 08:04:29,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-12-22 08:04:29,324 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:04:29,324 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:04:29,325 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 08:04:29,325 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:04:29,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:04:29,325 INFO L82 PathProgramCache]: Analyzing trace with hash -1776446511, now seen corresponding path program 1 times [2020-12-22 08:04:29,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:04:29,326 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707309233] [2020-12-22 08:04:29,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:04:29,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:04:29,537 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:04:29,538 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707309233] [2020-12-22 08:04:29,538 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:04:29,538 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 08:04:29,538 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016837650] [2020-12-22 08:04:29,538 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 08:04:29,539 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:04:29,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 08:04:29,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:04:29,540 INFO L87 Difference]: Start difference. First operand 11224 states and 18020 transitions. Second operand 5 states. [2020-12-22 08:04:30,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:04:30,976 INFO L93 Difference]: Finished difference Result 35257 states and 57017 transitions. [2020-12-22 08:04:30,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 08:04:30,977 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 70 [2020-12-22 08:04:30,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:04:31,038 INFO L225 Difference]: With dead ends: 35257 [2020-12-22 08:04:31,039 INFO L226 Difference]: Without dead ends: 24114 [2020-12-22 08:04:31,055 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:04:31,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24114 states. [2020-12-22 08:04:32,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24114 to 16142. [2020-12-22 08:04:32,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16142 states. [2020-12-22 08:04:32,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16142 states to 16142 states and 25907 transitions. [2020-12-22 08:04:32,458 INFO L78 Accepts]: Start accepts. Automaton has 16142 states and 25907 transitions. Word has length 70 [2020-12-22 08:04:32,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:04:32,459 INFO L481 AbstractCegarLoop]: Abstraction has 16142 states and 25907 transitions. [2020-12-22 08:04:32,459 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 08:04:32,459 INFO L276 IsEmpty]: Start isEmpty. Operand 16142 states and 25907 transitions. [2020-12-22 08:04:32,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-12-22 08:04:32,460 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:04:32,460 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:04:32,460 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 08:04:32,460 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:04:32,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:04:32,461 INFO L82 PathProgramCache]: Analyzing trace with hash 762823713, now seen corresponding path program 1 times [2020-12-22 08:04:32,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:04:32,461 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528848697] [2020-12-22 08:04:32,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:04:32,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:04:32,575 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 08:04:32,575 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528848697] [2020-12-22 08:04:32,575 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:04:32,576 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 08:04:32,576 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152338187] [2020-12-22 08:04:32,576 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 08:04:32,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:04:32,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 08:04:32,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:04:32,577 INFO L87 Difference]: Start difference. First operand 16142 states and 25907 transitions. Second operand 5 states. [2020-12-22 08:04:34,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:04:34,208 INFO L93 Difference]: Finished difference Result 32386 states and 51688 transitions. [2020-12-22 08:04:34,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 08:04:34,209 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 71 [2020-12-22 08:04:34,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:04:34,396 INFO L225 Difference]: With dead ends: 32386 [2020-12-22 08:04:34,396 INFO L226 Difference]: Without dead ends: 32384 [2020-12-22 08:04:34,411 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-22 08:04:34,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32384 states. [2020-12-22 08:04:35,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32384 to 16766. [2020-12-22 08:04:35,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16766 states. [2020-12-22 08:04:35,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16766 states to 16766 states and 26522 transitions. [2020-12-22 08:04:35,948 INFO L78 Accepts]: Start accepts. Automaton has 16766 states and 26522 transitions. Word has length 71 [2020-12-22 08:04:35,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:04:35,949 INFO L481 AbstractCegarLoop]: Abstraction has 16766 states and 26522 transitions. [2020-12-22 08:04:35,949 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 08:04:35,949 INFO L276 IsEmpty]: Start isEmpty. Operand 16766 states and 26522 transitions. [2020-12-22 08:04:35,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-12-22 08:04:35,958 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:04:35,958 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:04:35,958 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 08:04:35,958 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:04:35,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:04:35,959 INFO L82 PathProgramCache]: Analyzing trace with hash -1613729099, now seen corresponding path program 1 times [2020-12-22 08:04:35,959 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:04:35,960 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433877468] [2020-12-22 08:04:35,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:04:35,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:04:36,056 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 08:04:36,057 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433877468] [2020-12-22 08:04:36,057 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:04:36,057 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 08:04:36,057 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738179008] [2020-12-22 08:04:36,058 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 08:04:36,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:04:36,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 08:04:36,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:04:36,059 INFO L87 Difference]: Start difference. First operand 16766 states and 26522 transitions. Second operand 5 states. [2020-12-22 08:04:37,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:04:37,622 INFO L93 Difference]: Finished difference Result 24558 states and 39250 transitions. [2020-12-22 08:04:37,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 08:04:37,623 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 93 [2020-12-22 08:04:37,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:04:37,665 INFO L225 Difference]: With dead ends: 24558 [2020-12-22 08:04:37,665 INFO L226 Difference]: Without dead ends: 19386 [2020-12-22 08:04:37,678 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 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 08:04:37,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19386 states. [2020-12-22 08:04:39,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19386 to 18334. [2020-12-22 08:04:39,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18334 states. [2020-12-22 08:04:39,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18334 states to 18334 states and 28980 transitions. [2020-12-22 08:04:39,028 INFO L78 Accepts]: Start accepts. Automaton has 18334 states and 28980 transitions. Word has length 93 [2020-12-22 08:04:39,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:04:39,028 INFO L481 AbstractCegarLoop]: Abstraction has 18334 states and 28980 transitions. [2020-12-22 08:04:39,028 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 08:04:39,028 INFO L276 IsEmpty]: Start isEmpty. Operand 18334 states and 28980 transitions. [2020-12-22 08:04:39,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-12-22 08:04:39,031 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:04:39,032 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:04:39,032 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 08:04:39,032 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:04:39,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:04:39,033 INFO L82 PathProgramCache]: Analyzing trace with hash 351294822, now seen corresponding path program 1 times [2020-12-22 08:04:39,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:04:39,033 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164589701] [2020-12-22 08:04:39,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:04:39,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:04:39,163 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-12-22 08:04:39,163 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164589701] [2020-12-22 08:04:39,164 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:04:39,164 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 08:04:39,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514484453] [2020-12-22 08:04:39,164 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 08:04:39,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:04:39,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 08:04:39,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:04:39,166 INFO L87 Difference]: Start difference. First operand 18334 states and 28980 transitions. Second operand 5 states. [2020-12-22 08:04:40,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:04:40,731 INFO L93 Difference]: Finished difference Result 25592 states and 40770 transitions. [2020-12-22 08:04:40,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 08:04:40,732 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 93 [2020-12-22 08:04:40,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:04:40,763 INFO L225 Difference]: With dead ends: 25592 [2020-12-22 08:04:40,763 INFO L226 Difference]: Without dead ends: 20420 [2020-12-22 08:04:40,780 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 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 08:04:40,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20420 states. [2020-12-22 08:04:42,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20420 to 19998. [2020-12-22 08:04:42,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19998 states. [2020-12-22 08:04:42,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19998 states to 19998 states and 31664 transitions. [2020-12-22 08:04:42,220 INFO L78 Accepts]: Start accepts. Automaton has 19998 states and 31664 transitions. Word has length 93 [2020-12-22 08:04:42,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:04:42,221 INFO L481 AbstractCegarLoop]: Abstraction has 19998 states and 31664 transitions. [2020-12-22 08:04:42,221 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 08:04:42,221 INFO L276 IsEmpty]: Start isEmpty. Operand 19998 states and 31664 transitions. [2020-12-22 08:04:42,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-12-22 08:04:42,223 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:04:42,223 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:04:42,224 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 08:04:42,224 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:04:42,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:04:42,224 INFO L82 PathProgramCache]: Analyzing trace with hash -966648460, now seen corresponding path program 1 times [2020-12-22 08:04:42,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:04:42,225 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340688807] [2020-12-22 08:04:42,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:04:42,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:04:42,293 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 08:04:42,294 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340688807] [2020-12-22 08:04:42,296 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:04:42,296 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:04:42,297 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548456034] [2020-12-22 08:04:42,297 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:04:42,297 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:04:42,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:04:42,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:04:42,298 INFO L87 Difference]: Start difference. First operand 19998 states and 31664 transitions. Second operand 3 states. [2020-12-22 08:04:45,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:04:45,203 INFO L93 Difference]: Finished difference Result 39223 states and 62606 transitions. [2020-12-22 08:04:45,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:04:45,203 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 93 [2020-12-22 08:04:45,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:04:45,243 INFO L225 Difference]: With dead ends: 39223 [2020-12-22 08:04:45,243 INFO L226 Difference]: Without dead ends: 34011 [2020-12-22 08:04:45,257 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 08:04:45,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34011 states. [2020-12-22 08:04:47,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34011 to 33984. [2020-12-22 08:04:47,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33984 states. [2020-12-22 08:04:47,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33984 states to 33984 states and 54004 transitions. [2020-12-22 08:04:47,785 INFO L78 Accepts]: Start accepts. Automaton has 33984 states and 54004 transitions. Word has length 93 [2020-12-22 08:04:47,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:04:47,785 INFO L481 AbstractCegarLoop]: Abstraction has 33984 states and 54004 transitions. [2020-12-22 08:04:47,785 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:04:47,785 INFO L276 IsEmpty]: Start isEmpty. Operand 33984 states and 54004 transitions. [2020-12-22 08:04:47,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-12-22 08:04:47,788 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:04:47,789 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:04:47,789 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 08:04:47,789 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:04:47,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:04:47,790 INFO L82 PathProgramCache]: Analyzing trace with hash -447040382, now seen corresponding path program 1 times [2020-12-22 08:04:47,790 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:04:47,790 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432991703] [2020-12-22 08:04:47,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:04:47,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:04:47,845 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:04:47,845 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432991703] [2020-12-22 08:04:47,845 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:04:47,846 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:04:47,846 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593833405] [2020-12-22 08:04:47,846 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:04:47,846 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:04:47,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:04:47,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:04:47,847 INFO L87 Difference]: Start difference. First operand 33984 states and 54004 transitions. Second operand 3 states. [2020-12-22 08:04:52,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:04:52,654 INFO L93 Difference]: Finished difference Result 100046 states and 159011 transitions. [2020-12-22 08:04:52,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:04:52,655 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 94 [2020-12-22 08:04:52,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:04:52,777 INFO L225 Difference]: With dead ends: 100046 [2020-12-22 08:04:52,777 INFO L226 Difference]: Without dead ends: 66132 [2020-12-22 08:04:52,816 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 08:04:52,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66132 states. [2020-12-22 08:04:57,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66132 to 66130. [2020-12-22 08:04:57,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66130 states. [2020-12-22 08:04:57,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66130 states to 66130 states and 104426 transitions. [2020-12-22 08:04:57,662 INFO L78 Accepts]: Start accepts. Automaton has 66130 states and 104426 transitions. Word has length 94 [2020-12-22 08:04:57,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:04:57,662 INFO L481 AbstractCegarLoop]: Abstraction has 66130 states and 104426 transitions. [2020-12-22 08:04:57,662 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:04:57,662 INFO L276 IsEmpty]: Start isEmpty. Operand 66130 states and 104426 transitions. [2020-12-22 08:04:57,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-12-22 08:04:57,665 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:04:57,665 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:04:57,665 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 08:04:57,666 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:04:57,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:04:57,666 INFO L82 PathProgramCache]: Analyzing trace with hash 1281710540, now seen corresponding path program 1 times [2020-12-22 08:04:57,666 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:04:57,667 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683265262] [2020-12-22 08:04:57,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:04:57,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:04:57,719 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:04:57,719 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683265262] [2020-12-22 08:04:57,719 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:04:57,719 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:04:57,720 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238796376] [2020-12-22 08:04:57,722 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:04:57,722 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:04:57,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:04:57,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:04:57,723 INFO L87 Difference]: Start difference. First operand 66130 states and 104426 transitions. Second operand 3 states. [2020-12-22 08:05:06,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:05:06,976 INFO L93 Difference]: Finished difference Result 194618 states and 307349 transitions. [2020-12-22 08:05:06,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:05:06,977 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 94 [2020-12-22 08:05:06,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:05:07,333 INFO L225 Difference]: With dead ends: 194618 [2020-12-22 08:05:07,333 INFO L226 Difference]: Without dead ends: 128625 [2020-12-22 08:05:07,396 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 08:05:07,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128625 states. [2020-12-22 08:05:16,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128625 to 128623. [2020-12-22 08:05:16,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128623 states. [2020-12-22 08:05:17,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128623 states to 128623 states and 201753 transitions. [2020-12-22 08:05:17,139 INFO L78 Accepts]: Start accepts. Automaton has 128623 states and 201753 transitions. Word has length 94 [2020-12-22 08:05:17,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:05:17,140 INFO L481 AbstractCegarLoop]: Abstraction has 128623 states and 201753 transitions. [2020-12-22 08:05:17,140 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:05:17,140 INFO L276 IsEmpty]: Start isEmpty. Operand 128623 states and 201753 transitions. [2020-12-22 08:05:17,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-12-22 08:05:17,146 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:05:17,147 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:05:17,147 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 08:05:17,147 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:05:17,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:05:17,148 INFO L82 PathProgramCache]: Analyzing trace with hash 1270260760, now seen corresponding path program 1 times [2020-12-22 08:05:17,148 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:05:17,148 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693495535] [2020-12-22 08:05:17,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:05:17,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:05:17,228 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 08:05:17,228 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693495535] [2020-12-22 08:05:17,228 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:05:17,228 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 08:05:17,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112259091] [2020-12-22 08:05:17,229 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 08:05:17,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:05:17,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 08:05:17,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 08:05:17,230 INFO L87 Difference]: Start difference. First operand 128623 states and 201753 transitions. Second operand 4 states. [2020-12-22 08:05:26,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:05:26,605 INFO L93 Difference]: Finished difference Result 187209 states and 295432 transitions. [2020-12-22 08:05:26,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 08:05:26,605 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 94 [2020-12-22 08:05:26,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:05:26,837 INFO L225 Difference]: With dead ends: 187209 [2020-12-22 08:05:26,838 INFO L226 Difference]: Without dead ends: 132135 [2020-12-22 08:05:26,899 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 08:05:27,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132135 states. [2020-12-22 08:05:34,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132135 to 100671. [2020-12-22 08:05:34,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100671 states. [2020-12-22 08:05:35,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100671 states to 100671 states and 157049 transitions. [2020-12-22 08:05:35,161 INFO L78 Accepts]: Start accepts. Automaton has 100671 states and 157049 transitions. Word has length 94 [2020-12-22 08:05:35,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:05:35,365 INFO L481 AbstractCegarLoop]: Abstraction has 100671 states and 157049 transitions. [2020-12-22 08:05:35,365 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 08:05:35,365 INFO L276 IsEmpty]: Start isEmpty. Operand 100671 states and 157049 transitions. [2020-12-22 08:05:35,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-12-22 08:05:35,375 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:05:35,375 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:05:35,376 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 08:05:35,376 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:05:35,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:05:35,379 INFO L82 PathProgramCache]: Analyzing trace with hash 1988921020, now seen corresponding path program 1 times [2020-12-22 08:05:35,380 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:05:35,380 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142636381] [2020-12-22 08:05:35,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:05:35,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:05:35,470 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 08:05:35,470 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142636381] [2020-12-22 08:05:35,471 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:05:35,471 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 08:05:35,471 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370172425] [2020-12-22 08:05:35,471 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 08:05:35,472 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:05:35,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 08:05:35,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 08:05:35,472 INFO L87 Difference]: Start difference. First operand 100671 states and 157049 transitions. Second operand 4 states. [2020-12-22 08:05:44,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:05:44,650 INFO L93 Difference]: Finished difference Result 156333 states and 245820 transitions. [2020-12-22 08:05:44,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 08:05:44,650 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 95 [2020-12-22 08:05:44,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:05:44,851 INFO L225 Difference]: With dead ends: 156333 [2020-12-22 08:05:44,851 INFO L226 Difference]: Without dead ends: 121275 [2020-12-22 08:05:44,894 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 08:05:45,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121275 states. [2020-12-22 08:05:54,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121275 to 109487. [2020-12-22 08:05:54,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109487 states. [2020-12-22 08:05:54,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109487 states to 109487 states and 170525 transitions. [2020-12-22 08:05:54,357 INFO L78 Accepts]: Start accepts. Automaton has 109487 states and 170525 transitions. Word has length 95 [2020-12-22 08:05:54,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:05:54,358 INFO L481 AbstractCegarLoop]: Abstraction has 109487 states and 170525 transitions. [2020-12-22 08:05:54,358 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 08:05:54,358 INFO L276 IsEmpty]: Start isEmpty. Operand 109487 states and 170525 transitions. [2020-12-22 08:05:54,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-12-22 08:05:54,362 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:05:54,363 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:05:54,363 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-12-22 08:05:54,363 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:05:54,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:05:54,364 INFO L82 PathProgramCache]: Analyzing trace with hash 1437742065, now seen corresponding path program 1 times [2020-12-22 08:05:54,364 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:05:54,364 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640921929] [2020-12-22 08:05:54,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:05:54,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:05:54,422 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 08:05:54,423 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640921929] [2020-12-22 08:05:54,423 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:05:54,423 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:05:54,425 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842809741] [2020-12-22 08:05:54,426 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:05:54,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:05:54,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:05:54,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:05:54,426 INFO L87 Difference]: Start difference. First operand 109487 states and 170525 transitions. Second operand 3 states. [2020-12-22 08:06:09,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:06:09,582 INFO L93 Difference]: Finished difference Result 222511 states and 348233 transitions. [2020-12-22 08:06:09,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:06:09,583 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 95 [2020-12-22 08:06:09,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:06:09,916 INFO L225 Difference]: With dead ends: 222511 [2020-12-22 08:06:09,916 INFO L226 Difference]: Without dead ends: 187301 [2020-12-22 08:06:10,148 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:06:10,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187301 states. [2020-12-22 08:06:25,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187301 to 187071. [2020-12-22 08:06:25,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187071 states. [2020-12-22 08:06:26,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187071 states to 187071 states and 291395 transitions. [2020-12-22 08:06:26,135 INFO L78 Accepts]: Start accepts. Automaton has 187071 states and 291395 transitions. Word has length 95 [2020-12-22 08:06:26,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:06:26,135 INFO L481 AbstractCegarLoop]: Abstraction has 187071 states and 291395 transitions. [2020-12-22 08:06:26,135 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:06:26,135 INFO L276 IsEmpty]: Start isEmpty. Operand 187071 states and 291395 transitions. [2020-12-22 08:06:26,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-12-22 08:06:26,155 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:06:26,155 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:06:26,155 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-12-22 08:06:26,155 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:06:26,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:06:26,156 INFO L82 PathProgramCache]: Analyzing trace with hash 393120711, now seen corresponding path program 1 times [2020-12-22 08:06:26,156 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:06:26,156 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572352530] [2020-12-22 08:06:26,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:06:26,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:06:26,238 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:06:26,239 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572352530] [2020-12-22 08:06:26,240 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:06:26,240 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:06:26,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091341636] [2020-12-22 08:06:26,243 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:06:26,243 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:06:26,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:06:26,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:06:26,244 INFO L87 Difference]: Start difference. First operand 187071 states and 291395 transitions. Second operand 3 states.