/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/seq-mthreaded/pals_floodmax.4.4.ufo.BOUNDED-8.pals.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 07:22:21,055 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 07:22:21,058 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 07:22:21,093 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 07:22:21,094 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 07:22:21,095 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 07:22:21,097 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 07:22:21,099 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 07:22:21,101 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 07:22:21,102 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 07:22:21,103 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 07:22:21,105 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 07:22:21,105 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 07:22:21,107 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 07:22:21,108 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 07:22:21,109 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 07:22:21,110 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 07:22:21,111 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 07:22:21,114 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 07:22:21,116 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 07:22:21,122 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 07:22:21,123 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 07:22:21,124 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 07:22:21,125 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 07:22:21,140 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-22 07:22:21,140 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-22 07:22:21,140 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-22 07:22:21,141 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-22 07:22:21,142 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-22 07:22:21,143 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-22 07:22:21,143 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 07:22:21,144 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 07:22:21,145 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 07:22:21,146 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 07:22:21,147 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 07:22:21,148 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 07:22:21,149 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 07:22:21,149 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 07:22:21,149 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 07:22:21,150 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 07:22:21,151 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 07:22:21,155 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 07:22:21,210 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 07:22:21,210 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 07:22:21,212 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 07:22:21,213 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 07:22:21,214 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 07:22:21,214 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 07:22:21,214 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 07:22:21,214 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 07:22:21,215 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 07:22:21,215 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 07:22:21,215 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 07:22:21,215 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 07:22:21,215 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 07:22:21,216 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 07:22:21,216 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 07:22:21,216 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 07:22:21,216 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 07:22:21,217 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 07:22:21,217 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 07:22:21,217 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 07:22:21,217 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 07:22:21,217 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 07:22:21,218 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 07:22:21,218 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 07:22:21,219 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 07:22:21,219 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 07:22:21,597 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 07:22:21,624 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 07:22:21,627 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 07:22:21,629 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 07:22:21,629 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 07:22:21,630 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded/pals_floodmax.4.4.ufo.BOUNDED-8.pals.c [2020-12-22 07:22:21,720 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d1245b164/8b99a08c0e3b44c98371d810a8abe817/FLAG0e4d7e668 [2020-12-22 07:22:22,484 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 07:22:22,484 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_floodmax.4.4.ufo.BOUNDED-8.pals.c [2020-12-22 07:22:22,513 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d1245b164/8b99a08c0e3b44c98371d810a8abe817/FLAG0e4d7e668 [2020-12-22 07:22:22,804 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d1245b164/8b99a08c0e3b44c98371d810a8abe817 [2020-12-22 07:22:22,812 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 07:22:22,814 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 07:22:22,819 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 07:22:22,819 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 07:22:22,823 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 07:22:22,823 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:22:22" (1/1) ... [2020-12-22 07:22:22,826 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@49f2028f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:22:22, skipping insertion in model container [2020-12-22 07:22:22,826 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:22:22" (1/1) ... [2020-12-22 07:22:22,835 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 07:22:22,902 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 07:22:23,211 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_floodmax.4.4.ufo.BOUNDED-8.pals.c[28194,28207] [2020-12-22 07:22:23,215 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 07:22:23,227 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 07:22:23,341 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_floodmax.4.4.ufo.BOUNDED-8.pals.c[28194,28207] [2020-12-22 07:22:23,342 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 07:22:23,364 INFO L208 MainTranslator]: Completed translation [2020-12-22 07:22:23,365 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:22:23 WrapperNode [2020-12-22 07:22:23,365 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 07:22:23,366 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 07:22:23,366 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 07:22:23,367 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 07:22:23,393 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:22:23" (1/1) ... [2020-12-22 07:22:23,412 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:22:23" (1/1) ... [2020-12-22 07:22:23,491 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 07:22:23,492 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 07:22:23,492 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 07:22:23,492 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 07:22:23,502 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:22:23" (1/1) ... [2020-12-22 07:22:23,502 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:22:23" (1/1) ... [2020-12-22 07:22:23,508 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:22:23" (1/1) ... [2020-12-22 07:22:23,509 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:22:23" (1/1) ... [2020-12-22 07:22:23,526 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:22:23" (1/1) ... [2020-12-22 07:22:23,543 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:22:23" (1/1) ... [2020-12-22 07:22:23,548 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:22:23" (1/1) ... [2020-12-22 07:22:23,556 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 07:22:23,557 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 07:22:23,557 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 07:22:23,558 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 07:22:23,559 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:22:23" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 07:22:23,706 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 07:22:23,706 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 07:22:23,706 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 07:22:23,706 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 07:22:25,030 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 07:22:25,030 INFO L299 CfgBuilder]: Removed 21 assume(true) statements. [2020-12-22 07:22:25,033 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:22:25 BoogieIcfgContainer [2020-12-22 07:22:25,033 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 07:22:25,035 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 07:22:25,035 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 07:22:25,038 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 07:22:25,039 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 07:22:22" (1/3) ... [2020-12-22 07:22:25,040 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d46698c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 07:22:25, skipping insertion in model container [2020-12-22 07:22:25,040 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:22:23" (2/3) ... [2020-12-22 07:22:25,040 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d46698c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 07:22:25, skipping insertion in model container [2020-12-22 07:22:25,040 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:22:25" (3/3) ... [2020-12-22 07:22:25,042 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_floodmax.4.4.ufo.BOUNDED-8.pals.c [2020-12-22 07:22:25,048 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 07:22:25,053 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 07:22:25,072 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 07:22:25,103 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 07:22:25,103 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 07:22:25,103 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 07:22:25,103 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 07:22:25,103 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 07:22:25,103 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 07:22:25,104 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 07:22:25,104 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 07:22:25,124 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states. [2020-12-22 07:22:25,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-12-22 07:22:25,137 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:22:25,138 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:22:25,138 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:22:25,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:22:25,145 INFO L82 PathProgramCache]: Analyzing trace with hash -2110216456, now seen corresponding path program 1 times [2020-12-22 07:22:25,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:22:25,157 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975143574] [2020-12-22 07:22:25,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:22:25,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:22:25,566 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:22:25,568 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975143574] [2020-12-22 07:22:25,568 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:22:25,569 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 07:22:25,570 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269584140] [2020-12-22 07:22:25,575 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 07:22:25,575 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:22:25,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 07:22:25,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 07:22:25,596 INFO L87 Difference]: Start difference. First operand 304 states. Second operand 2 states. [2020-12-22 07:22:25,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:22:25,657 INFO L93 Difference]: Finished difference Result 417 states and 738 transitions. [2020-12-22 07:22:25,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 07:22:25,659 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 77 [2020-12-22 07:22:25,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:22:25,676 INFO L225 Difference]: With dead ends: 417 [2020-12-22 07:22:25,676 INFO L226 Difference]: Without dead ends: 300 [2020-12-22 07:22:25,680 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 07:22:25,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2020-12-22 07:22:25,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 300. [2020-12-22 07:22:25,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 300 states. [2020-12-22 07:22:25,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 539 transitions. [2020-12-22 07:22:25,761 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 539 transitions. Word has length 77 [2020-12-22 07:22:25,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:22:25,762 INFO L481 AbstractCegarLoop]: Abstraction has 300 states and 539 transitions. [2020-12-22 07:22:25,762 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 07:22:25,762 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 539 transitions. [2020-12-22 07:22:25,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-12-22 07:22:25,771 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:22:25,771 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:22:25,771 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 07:22:25,771 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:22:25,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:22:25,772 INFO L82 PathProgramCache]: Analyzing trace with hash 2050737334, now seen corresponding path program 1 times [2020-12-22 07:22:25,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:22:25,773 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862970128] [2020-12-22 07:22:25,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:22:25,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:22:26,042 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:22:26,043 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862970128] [2020-12-22 07:22:26,043 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:22:26,043 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:22:26,044 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744426029] [2020-12-22 07:22:26,046 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:22:26,046 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:22:26,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:22:26,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:22:26,048 INFO L87 Difference]: Start difference. First operand 300 states and 539 transitions. Second operand 5 states. [2020-12-22 07:22:26,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:22:26,201 INFO L93 Difference]: Finished difference Result 412 states and 728 transitions. [2020-12-22 07:22:26,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 07:22:26,202 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 77 [2020-12-22 07:22:26,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:22:26,209 INFO L225 Difference]: With dead ends: 412 [2020-12-22 07:22:26,209 INFO L226 Difference]: Without dead ends: 300 [2020-12-22 07:22:26,213 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 07:22:26,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2020-12-22 07:22:26,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 300. [2020-12-22 07:22:26,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 300 states. [2020-12-22 07:22:26,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 497 transitions. [2020-12-22 07:22:26,255 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 497 transitions. Word has length 77 [2020-12-22 07:22:26,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:22:26,255 INFO L481 AbstractCegarLoop]: Abstraction has 300 states and 497 transitions. [2020-12-22 07:22:26,256 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:22:26,256 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 497 transitions. [2020-12-22 07:22:26,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2020-12-22 07:22:26,262 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:22:26,262 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:22:26,262 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 07:22:26,263 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:22:26,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:22:26,264 INFO L82 PathProgramCache]: Analyzing trace with hash 255571390, now seen corresponding path program 1 times [2020-12-22 07:22:26,264 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:22:26,264 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005521618] [2020-12-22 07:22:26,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:22:26,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:22:26,500 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:22:26,502 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005521618] [2020-12-22 07:22:26,502 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:22:26,502 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:22:26,503 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364089102] [2020-12-22 07:22:26,504 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:22:26,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:22:26,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:22:26,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:22:26,516 INFO L87 Difference]: Start difference. First operand 300 states and 497 transitions. Second operand 3 states. [2020-12-22 07:22:26,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:22:26,581 INFO L93 Difference]: Finished difference Result 505 states and 846 transitions. [2020-12-22 07:22:26,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:22:26,582 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 118 [2020-12-22 07:22:26,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:22:26,587 INFO L225 Difference]: With dead ends: 505 [2020-12-22 07:22:26,587 INFO L226 Difference]: Without dead ends: 397 [2020-12-22 07:22:26,590 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:22:26,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2020-12-22 07:22:26,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 395. [2020-12-22 07:22:26,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 395 states. [2020-12-22 07:22:26,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 655 transitions. [2020-12-22 07:22:26,628 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 655 transitions. Word has length 118 [2020-12-22 07:22:26,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:22:26,633 INFO L481 AbstractCegarLoop]: Abstraction has 395 states and 655 transitions. [2020-12-22 07:22:26,633 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:22:26,635 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 655 transitions. [2020-12-22 07:22:26,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-12-22 07:22:26,642 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:22:26,642 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:22:26,642 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 07:22:26,642 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:22:26,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:22:26,643 INFO L82 PathProgramCache]: Analyzing trace with hash -1923540700, now seen corresponding path program 1 times [2020-12-22 07:22:26,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:22:26,644 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289363836] [2020-12-22 07:22:26,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:22:26,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:22:26,817 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:22:26,817 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289363836] [2020-12-22 07:22:26,818 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:22:26,819 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:22:26,819 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335881972] [2020-12-22 07:22:26,820 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:22:26,820 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:22:26,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:22:26,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:22:26,825 INFO L87 Difference]: Start difference. First operand 395 states and 655 transitions. Second operand 3 states. [2020-12-22 07:22:26,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:22:26,856 INFO L93 Difference]: Finished difference Result 593 states and 993 transitions. [2020-12-22 07:22:26,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:22:26,856 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 121 [2020-12-22 07:22:26,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:22:26,860 INFO L225 Difference]: With dead ends: 593 [2020-12-22 07:22:26,860 INFO L226 Difference]: Without dead ends: 485 [2020-12-22 07:22:26,861 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:22:26,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 485 states. [2020-12-22 07:22:26,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 485 to 483. [2020-12-22 07:22:26,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 483 states. [2020-12-22 07:22:26,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 483 states to 483 states and 805 transitions. [2020-12-22 07:22:26,881 INFO L78 Accepts]: Start accepts. Automaton has 483 states and 805 transitions. Word has length 121 [2020-12-22 07:22:26,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:22:26,881 INFO L481 AbstractCegarLoop]: Abstraction has 483 states and 805 transitions. [2020-12-22 07:22:26,882 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:22:26,882 INFO L276 IsEmpty]: Start isEmpty. Operand 483 states and 805 transitions. [2020-12-22 07:22:26,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-12-22 07:22:26,884 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:22:26,884 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:22:26,884 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 07:22:26,884 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:22:26,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:22:26,885 INFO L82 PathProgramCache]: Analyzing trace with hash 1109580608, now seen corresponding path program 1 times [2020-12-22 07:22:26,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:22:26,885 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996706050] [2020-12-22 07:22:26,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:22:26,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:22:27,011 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:22:27,011 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996706050] [2020-12-22 07:22:27,012 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:22:27,012 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:22:27,012 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112922087] [2020-12-22 07:22:27,013 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:22:27,013 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:22:27,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:22:27,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:22:27,016 INFO L87 Difference]: Start difference. First operand 483 states and 805 transitions. Second operand 3 states. [2020-12-22 07:22:27,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:22:27,054 INFO L93 Difference]: Finished difference Result 1034 states and 1736 transitions. [2020-12-22 07:22:27,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:22:27,055 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 121 [2020-12-22 07:22:27,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:22:27,060 INFO L225 Difference]: With dead ends: 1034 [2020-12-22 07:22:27,060 INFO L226 Difference]: Without dead ends: 745 [2020-12-22 07:22:27,061 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:22:27,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 745 states. [2020-12-22 07:22:27,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 745 to 743. [2020-12-22 07:22:27,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 743 states. [2020-12-22 07:22:27,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 743 states to 743 states and 1241 transitions. [2020-12-22 07:22:27,088 INFO L78 Accepts]: Start accepts. Automaton has 743 states and 1241 transitions. Word has length 121 [2020-12-22 07:22:27,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:22:27,089 INFO L481 AbstractCegarLoop]: Abstraction has 743 states and 1241 transitions. [2020-12-22 07:22:27,089 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:22:27,089 INFO L276 IsEmpty]: Start isEmpty. Operand 743 states and 1241 transitions. [2020-12-22 07:22:27,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-12-22 07:22:27,091 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:22:27,091 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:22:27,091 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 07:22:27,091 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:22:27,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:22:27,092 INFO L82 PathProgramCache]: Analyzing trace with hash 2073181113, now seen corresponding path program 1 times [2020-12-22 07:22:27,092 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:22:27,093 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809935236] [2020-12-22 07:22:27,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:22:27,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:22:27,186 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:22:27,187 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809935236] [2020-12-22 07:22:27,187 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:22:27,188 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:22:27,188 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210511036] [2020-12-22 07:22:27,188 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:22:27,189 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:22:27,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:22:27,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:22:27,190 INFO L87 Difference]: Start difference. First operand 743 states and 1241 transitions. Second operand 3 states. [2020-12-22 07:22:27,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:22:27,228 INFO L93 Difference]: Finished difference Result 1274 states and 2138 transitions. [2020-12-22 07:22:27,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:22:27,228 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 124 [2020-12-22 07:22:27,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:22:27,235 INFO L225 Difference]: With dead ends: 1274 [2020-12-22 07:22:27,235 INFO L226 Difference]: Without dead ends: 985 [2020-12-22 07:22:27,236 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:22:27,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 985 states. [2020-12-22 07:22:27,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 985 to 983. [2020-12-22 07:22:27,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 983 states. [2020-12-22 07:22:27,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 983 states to 983 states and 1642 transitions. [2020-12-22 07:22:27,268 INFO L78 Accepts]: Start accepts. Automaton has 983 states and 1642 transitions. Word has length 124 [2020-12-22 07:22:27,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:22:27,269 INFO L481 AbstractCegarLoop]: Abstraction has 983 states and 1642 transitions. [2020-12-22 07:22:27,269 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:22:27,269 INFO L276 IsEmpty]: Start isEmpty. Operand 983 states and 1642 transitions. [2020-12-22 07:22:27,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-12-22 07:22:27,271 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:22:27,271 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:22:27,271 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 07:22:27,271 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:22:27,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:22:27,272 INFO L82 PathProgramCache]: Analyzing trace with hash -1914082347, now seen corresponding path program 1 times [2020-12-22 07:22:27,272 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:22:27,273 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621678376] [2020-12-22 07:22:27,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:22:27,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:22:27,368 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:22:27,369 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621678376] [2020-12-22 07:22:27,369 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:22:27,369 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:22:27,369 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950536562] [2020-12-22 07:22:27,370 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:22:27,370 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:22:27,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:22:27,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:22:27,371 INFO L87 Difference]: Start difference. First operand 983 states and 1642 transitions. Second operand 3 states. [2020-12-22 07:22:27,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:22:27,432 INFO L93 Difference]: Finished difference Result 2454 states and 4107 transitions. [2020-12-22 07:22:27,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:22:27,433 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 124 [2020-12-22 07:22:27,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:22:27,442 INFO L225 Difference]: With dead ends: 2454 [2020-12-22 07:22:27,442 INFO L226 Difference]: Without dead ends: 1678 [2020-12-22 07:22:27,444 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:22:27,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1678 states. [2020-12-22 07:22:27,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1678 to 1676. [2020-12-22 07:22:27,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1676 states. [2020-12-22 07:22:27,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1676 states to 1676 states and 2788 transitions. [2020-12-22 07:22:27,502 INFO L78 Accepts]: Start accepts. Automaton has 1676 states and 2788 transitions. Word has length 124 [2020-12-22 07:22:27,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:22:27,502 INFO L481 AbstractCegarLoop]: Abstraction has 1676 states and 2788 transitions. [2020-12-22 07:22:27,502 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:22:27,502 INFO L276 IsEmpty]: Start isEmpty. Operand 1676 states and 2788 transitions. [2020-12-22 07:22:27,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-12-22 07:22:27,504 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:22:27,504 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:22:27,505 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 07:22:27,505 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:22:27,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:22:27,505 INFO L82 PathProgramCache]: Analyzing trace with hash 1459354075, now seen corresponding path program 1 times [2020-12-22 07:22:27,506 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:22:27,506 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115885682] [2020-12-22 07:22:27,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:22:27,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:22:27,605 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:22:27,606 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115885682] [2020-12-22 07:22:27,606 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:22:27,606 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:22:27,606 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917175581] [2020-12-22 07:22:27,607 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:22:27,607 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:22:27,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:22:27,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:22:27,608 INFO L87 Difference]: Start difference. First operand 1676 states and 2788 transitions. Second operand 3 states. [2020-12-22 07:22:27,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:22:27,673 INFO L93 Difference]: Finished difference Result 3061 states and 5111 transitions. [2020-12-22 07:22:27,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:22:27,674 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 127 [2020-12-22 07:22:27,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:22:27,688 INFO L225 Difference]: With dead ends: 3061 [2020-12-22 07:22:27,688 INFO L226 Difference]: Without dead ends: 2285 [2020-12-22 07:22:27,690 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:22:27,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2285 states. [2020-12-22 07:22:27,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2285 to 2283. [2020-12-22 07:22:27,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2283 states. [2020-12-22 07:22:27,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2283 states to 2283 states and 3791 transitions. [2020-12-22 07:22:27,774 INFO L78 Accepts]: Start accepts. Automaton has 2283 states and 3791 transitions. Word has length 127 [2020-12-22 07:22:27,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:22:27,775 INFO L481 AbstractCegarLoop]: Abstraction has 2283 states and 3791 transitions. [2020-12-22 07:22:27,775 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:22:27,775 INFO L276 IsEmpty]: Start isEmpty. Operand 2283 states and 3791 transitions. [2020-12-22 07:22:27,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-12-22 07:22:27,777 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:22:27,777 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:22:27,777 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 07:22:27,778 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:22:27,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:22:27,778 INFO L82 PathProgramCache]: Analyzing trace with hash -1832413193, now seen corresponding path program 1 times [2020-12-22 07:22:27,779 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:22:27,779 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852772801] [2020-12-22 07:22:27,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:22:27,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:22:27,901 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:22:27,902 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852772801] [2020-12-22 07:22:27,902 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:22:27,902 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:22:27,903 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085367265] [2020-12-22 07:22:27,903 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:22:27,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:22:27,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:22:27,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:22:27,904 INFO L87 Difference]: Start difference. First operand 2283 states and 3791 transitions. Second operand 3 states. [2020-12-22 07:22:28,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:22:28,002 INFO L93 Difference]: Finished difference Result 6166 states and 10210 transitions. [2020-12-22 07:22:28,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:22:28,003 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 127 [2020-12-22 07:22:28,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:22:28,025 INFO L225 Difference]: With dead ends: 6166 [2020-12-22 07:22:28,025 INFO L226 Difference]: Without dead ends: 4103 [2020-12-22 07:22:28,030 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:22:28,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4103 states. [2020-12-22 07:22:28,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4103 to 4101. [2020-12-22 07:22:28,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4101 states. [2020-12-22 07:22:28,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4101 states to 4101 states and 6743 transitions. [2020-12-22 07:22:28,189 INFO L78 Accepts]: Start accepts. Automaton has 4101 states and 6743 transitions. Word has length 127 [2020-12-22 07:22:28,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:22:28,190 INFO L481 AbstractCegarLoop]: Abstraction has 4101 states and 6743 transitions. [2020-12-22 07:22:28,190 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:22:28,190 INFO L276 IsEmpty]: Start isEmpty. Operand 4101 states and 6743 transitions. [2020-12-22 07:22:28,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-12-22 07:22:28,192 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:22:28,192 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:22:28,193 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 07:22:28,193 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:22:28,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:22:28,194 INFO L82 PathProgramCache]: Analyzing trace with hash -1181394736, now seen corresponding path program 1 times [2020-12-22 07:22:28,195 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:22:28,195 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550789415] [2020-12-22 07:22:28,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:22:28,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:22:28,403 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:22:28,403 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550789415] [2020-12-22 07:22:28,404 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:22:28,404 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:22:28,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989964904] [2020-12-22 07:22:28,405 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:22:28,406 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:22:28,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:22:28,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:22:28,407 INFO L87 Difference]: Start difference. First operand 4101 states and 6743 transitions. Second operand 3 states. [2020-12-22 07:22:28,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:22:28,602 INFO L93 Difference]: Finished difference Result 7700 states and 12696 transitions. [2020-12-22 07:22:28,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:22:28,603 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 130 [2020-12-22 07:22:28,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:22:28,639 INFO L225 Difference]: With dead ends: 7700 [2020-12-22 07:22:28,640 INFO L226 Difference]: Without dead ends: 5637 [2020-12-22 07:22:28,645 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:22:28,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5637 states. [2020-12-22 07:22:28,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5637 to 5635. [2020-12-22 07:22:28,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5635 states. [2020-12-22 07:22:28,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5635 states to 5635 states and 9228 transitions. [2020-12-22 07:22:28,875 INFO L78 Accepts]: Start accepts. Automaton has 5635 states and 9228 transitions. Word has length 130 [2020-12-22 07:22:28,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:22:28,876 INFO L481 AbstractCegarLoop]: Abstraction has 5635 states and 9228 transitions. [2020-12-22 07:22:28,876 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:22:28,876 INFO L276 IsEmpty]: Start isEmpty. Operand 5635 states and 9228 transitions. [2020-12-22 07:22:28,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-12-22 07:22:28,878 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:22:28,878 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:22:28,878 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 07:22:28,878 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:22:28,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:22:28,879 INFO L82 PathProgramCache]: Analyzing trace with hash -163814164, now seen corresponding path program 1 times [2020-12-22 07:22:28,879 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:22:28,880 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036109753] [2020-12-22 07:22:28,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:22:28,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:22:29,058 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:22:29,059 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036109753] [2020-12-22 07:22:29,059 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:22:29,059 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 07:22:29,060 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270744791] [2020-12-22 07:22:29,060 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 07:22:29,060 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:22:29,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 07:22:29,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 07:22:29,063 INFO L87 Difference]: Start difference. First operand 5635 states and 9228 transitions. Second operand 6 states. [2020-12-22 07:22:30,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:22:30,140 INFO L93 Difference]: Finished difference Result 34219 states and 56471 transitions. [2020-12-22 07:22:30,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 07:22:30,141 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 130 [2020-12-22 07:22:30,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:22:30,258 INFO L225 Difference]: With dead ends: 34219 [2020-12-22 07:22:30,258 INFO L226 Difference]: Without dead ends: 28817 [2020-12-22 07:22:30,274 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-12-22 07:22:30,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28817 states. [2020-12-22 07:22:31,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28817 to 10967. [2020-12-22 07:22:31,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10967 states. [2020-12-22 07:22:31,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10967 states to 10967 states and 17845 transitions. [2020-12-22 07:22:31,093 INFO L78 Accepts]: Start accepts. Automaton has 10967 states and 17845 transitions. Word has length 130 [2020-12-22 07:22:31,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:22:31,094 INFO L481 AbstractCegarLoop]: Abstraction has 10967 states and 17845 transitions. [2020-12-22 07:22:31,094 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 07:22:31,094 INFO L276 IsEmpty]: Start isEmpty. Operand 10967 states and 17845 transitions. [2020-12-22 07:22:31,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-12-22 07:22:31,096 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:22:31,097 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:22:31,097 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 07:22:31,097 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:22:31,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:22:31,098 INFO L82 PathProgramCache]: Analyzing trace with hash 1417088843, now seen corresponding path program 1 times [2020-12-22 07:22:31,098 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:22:31,099 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743076320] [2020-12-22 07:22:31,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:22:31,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:22:31,362 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:22:31,363 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743076320] [2020-12-22 07:22:31,363 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:22:31,363 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:22:31,364 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559445760] [2020-12-22 07:22:31,364 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:22:31,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:22:31,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:22:31,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:22:31,365 INFO L87 Difference]: Start difference. First operand 10967 states and 17845 transitions. Second operand 4 states. [2020-12-22 07:22:32,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:22:32,227 INFO L93 Difference]: Finished difference Result 32421 states and 53133 transitions. [2020-12-22 07:22:32,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:22:32,228 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 131 [2020-12-22 07:22:32,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:22:32,280 INFO L225 Difference]: With dead ends: 32421 [2020-12-22 07:22:32,280 INFO L226 Difference]: Without dead ends: 21687 [2020-12-22 07:22:32,298 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:22:32,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21687 states. [2020-12-22 07:22:33,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21687 to 18012. [2020-12-22 07:22:33,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18012 states. [2020-12-22 07:22:33,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18012 states to 18012 states and 29344 transitions. [2020-12-22 07:22:33,109 INFO L78 Accepts]: Start accepts. Automaton has 18012 states and 29344 transitions. Word has length 131 [2020-12-22 07:22:33,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:22:33,109 INFO L481 AbstractCegarLoop]: Abstraction has 18012 states and 29344 transitions. [2020-12-22 07:22:33,110 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:22:33,110 INFO L276 IsEmpty]: Start isEmpty. Operand 18012 states and 29344 transitions. [2020-12-22 07:22:33,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2020-12-22 07:22:33,111 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:22:33,112 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:22:33,112 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 07:22:33,113 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:22:33,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:22:33,114 INFO L82 PathProgramCache]: Analyzing trace with hash -945521149, now seen corresponding path program 1 times [2020-12-22 07:22:33,114 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:22:33,114 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804720828] [2020-12-22 07:22:33,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:22:33,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:22:33,290 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:22:33,290 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804720828] [2020-12-22 07:22:33,290 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:22:33,291 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:22:33,291 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764907256] [2020-12-22 07:22:33,291 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:22:33,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:22:33,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:22:33,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:22:33,292 INFO L87 Difference]: Start difference. First operand 18012 states and 29344 transitions. Second operand 4 states. [2020-12-22 07:22:34,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:22:34,511 INFO L93 Difference]: Finished difference Result 52879 states and 86403 transitions. [2020-12-22 07:22:34,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:22:34,512 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 132 [2020-12-22 07:22:34,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:22:34,677 INFO L225 Difference]: With dead ends: 52879 [2020-12-22 07:22:34,677 INFO L226 Difference]: Without dead ends: 35100 [2020-12-22 07:22:34,706 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:22:34,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35100 states. [2020-12-22 07:22:35,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35100 to 29449. [2020-12-22 07:22:35,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29449 states. [2020-12-22 07:22:35,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29449 states to 29449 states and 47793 transitions. [2020-12-22 07:22:35,886 INFO L78 Accepts]: Start accepts. Automaton has 29449 states and 47793 transitions. Word has length 132 [2020-12-22 07:22:35,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:22:35,886 INFO L481 AbstractCegarLoop]: Abstraction has 29449 states and 47793 transitions. [2020-12-22 07:22:35,887 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:22:35,887 INFO L276 IsEmpty]: Start isEmpty. Operand 29449 states and 47793 transitions. [2020-12-22 07:22:35,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2020-12-22 07:22:35,888 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:22:35,889 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:22:35,889 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 07:22:35,889 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:22:35,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:22:35,890 INFO L82 PathProgramCache]: Analyzing trace with hash -1002982526, now seen corresponding path program 1 times [2020-12-22 07:22:35,890 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:22:35,890 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935093993] [2020-12-22 07:22:35,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:22:35,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:22:36,104 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:22:36,105 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935093993] [2020-12-22 07:22:36,105 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:22:36,105 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:22:36,105 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996650181] [2020-12-22 07:22:36,106 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:22:36,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:22:36,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:22:36,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:22:36,107 INFO L87 Difference]: Start difference. First operand 29449 states and 47793 transitions. Second operand 4 states. [2020-12-22 07:22:38,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:22:38,013 INFO L93 Difference]: Finished difference Result 85951 states and 139911 transitions. [2020-12-22 07:22:38,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:22:38,014 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 133 [2020-12-22 07:22:38,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:22:38,169 INFO L225 Difference]: With dead ends: 85951 [2020-12-22 07:22:38,170 INFO L226 Difference]: Without dead ends: 56735 [2020-12-22 07:22:38,205 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:22:38,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56735 states. [2020-12-22 07:22:39,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56735 to 47894. [2020-12-22 07:22:39,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47894 states. [2020-12-22 07:22:40,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47894 states to 47894 states and 77430 transitions. [2020-12-22 07:22:40,054 INFO L78 Accepts]: Start accepts. Automaton has 47894 states and 77430 transitions. Word has length 133 [2020-12-22 07:22:40,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:22:40,055 INFO L481 AbstractCegarLoop]: Abstraction has 47894 states and 77430 transitions. [2020-12-22 07:22:40,055 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:22:40,055 INFO L276 IsEmpty]: Start isEmpty. Operand 47894 states and 77430 transitions. [2020-12-22 07:22:40,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2020-12-22 07:22:40,057 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:22:40,057 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:22:40,057 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 07:22:40,058 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:22:40,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:22:40,058 INFO L82 PathProgramCache]: Analyzing trace with hash 1679686426, now seen corresponding path program 1 times [2020-12-22 07:22:40,059 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:22:40,059 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046116778] [2020-12-22 07:22:40,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:22:40,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:22:40,218 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:22:40,218 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046116778] [2020-12-22 07:22:40,219 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:22:40,219 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:22:40,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274182832] [2020-12-22 07:22:40,220 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:22:40,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:22:40,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:22:40,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:22:40,221 INFO L87 Difference]: Start difference. First operand 47894 states and 77430 transitions. Second operand 4 states. [2020-12-22 07:22:42,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:22:42,213 INFO L93 Difference]: Finished difference Result 137703 states and 223323 transitions. [2020-12-22 07:22:42,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:22:42,213 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 134 [2020-12-22 07:22:42,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:22:42,412 INFO L225 Difference]: With dead ends: 137703 [2020-12-22 07:22:42,412 INFO L226 Difference]: Without dead ends: 90042 [2020-12-22 07:22:42,470 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:22:42,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90042 states. [2020-12-22 07:22:44,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90042 to 76943. [2020-12-22 07:22:44,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76943 states. [2020-12-22 07:22:45,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76943 states to 76943 states and 123931 transitions. [2020-12-22 07:22:45,022 INFO L78 Accepts]: Start accepts. Automaton has 76943 states and 123931 transitions. Word has length 134 [2020-12-22 07:22:45,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:22:45,023 INFO L481 AbstractCegarLoop]: Abstraction has 76943 states and 123931 transitions. [2020-12-22 07:22:45,023 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:22:45,023 INFO L276 IsEmpty]: Start isEmpty. Operand 76943 states and 123931 transitions. [2020-12-22 07:22:45,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-12-22 07:22:45,024 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:22:45,025 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:22:45,025 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 07:22:45,025 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:22:45,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:22:45,026 INFO L82 PathProgramCache]: Analyzing trace with hash 1349768178, now seen corresponding path program 1 times [2020-12-22 07:22:45,026 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:22:45,026 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271423506] [2020-12-22 07:22:45,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:22:45,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:22:45,429 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:22:45,430 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271423506] [2020-12-22 07:22:45,432 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:22:45,432 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 07:22:45,433 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554573671] [2020-12-22 07:22:45,433 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 07:22:45,433 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:22:45,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 07:22:45,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-12-22 07:22:45,434 INFO L87 Difference]: Start difference. First operand 76943 states and 123931 transitions. Second operand 6 states. [2020-12-22 07:22:48,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:22:48,105 INFO L93 Difference]: Finished difference Result 185517 states and 299643 transitions. [2020-12-22 07:22:48,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 07:22:48,106 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 136 [2020-12-22 07:22:48,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:22:48,325 INFO L225 Difference]: With dead ends: 185517 [2020-12-22 07:22:48,325 INFO L226 Difference]: Without dead ends: 108807 [2020-12-22 07:22:48,400 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2020-12-22 07:22:48,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108807 states. [2020-12-22 07:22:51,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108807 to 76943. [2020-12-22 07:22:51,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76943 states. [2020-12-22 07:22:51,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76943 states to 76943 states and 123306 transitions. [2020-12-22 07:22:51,344 INFO L78 Accepts]: Start accepts. Automaton has 76943 states and 123306 transitions. Word has length 136 [2020-12-22 07:22:51,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:22:51,345 INFO L481 AbstractCegarLoop]: Abstraction has 76943 states and 123306 transitions. [2020-12-22 07:22:51,345 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 07:22:51,345 INFO L276 IsEmpty]: Start isEmpty. Operand 76943 states and 123306 transitions. [2020-12-22 07:22:51,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2020-12-22 07:22:51,347 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:22:51,347 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:22:51,347 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 07:22:51,347 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:22:51,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:22:51,348 INFO L82 PathProgramCache]: Analyzing trace with hash 412618117, now seen corresponding path program 1 times [2020-12-22 07:22:51,348 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:22:51,348 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469356804] [2020-12-22 07:22:51,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:22:51,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:22:51,554 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:22:51,554 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469356804] [2020-12-22 07:22:51,555 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:22:51,555 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:22:51,555 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933187274] [2020-12-22 07:22:51,556 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:22:51,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:22:51,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:22:51,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:22:51,557 INFO L87 Difference]: Start difference. First operand 76943 states and 123306 transitions. Second operand 4 states. [2020-12-22 07:22:55,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:22:55,480 INFO L93 Difference]: Finished difference Result 228942 states and 366846 transitions. [2020-12-22 07:22:55,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:22:55,481 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 139 [2020-12-22 07:22:55,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:22:55,742 INFO L225 Difference]: With dead ends: 228942 [2020-12-22 07:22:55,742 INFO L226 Difference]: Without dead ends: 152010 [2020-12-22 07:22:55,826 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:22:55,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152010 states. [2020-12-22 07:23:00,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152010 to 152008. [2020-12-22 07:23:00,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152008 states. [2020-12-22 07:23:01,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152008 states to 152008 states and 242382 transitions. [2020-12-22 07:23:01,083 INFO L78 Accepts]: Start accepts. Automaton has 152008 states and 242382 transitions. Word has length 139 [2020-12-22 07:23:01,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:23:01,083 INFO L481 AbstractCegarLoop]: Abstraction has 152008 states and 242382 transitions. [2020-12-22 07:23:01,083 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:23:01,084 INFO L276 IsEmpty]: Start isEmpty. Operand 152008 states and 242382 transitions. [2020-12-22 07:23:01,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2020-12-22 07:23:01,100 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:23:01,100 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:23:01,100 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 07:23:01,100 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:23:01,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:23:01,103 INFO L82 PathProgramCache]: Analyzing trace with hash 1038580458, now seen corresponding path program 1 times [2020-12-22 07:23:01,103 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:23:01,104 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130535969] [2020-12-22 07:23:01,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:23:01,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:23:01,382 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:23:01,382 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130535969] [2020-12-22 07:23:01,383 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:23:01,383 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:23:01,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348361611] [2020-12-22 07:23:01,390 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:23:01,391 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:23:01,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:23:01,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:23:01,392 INFO L87 Difference]: Start difference. First operand 152008 states and 242382 transitions. Second operand 4 states. [2020-12-22 07:23:08,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:23:08,976 INFO L93 Difference]: Finished difference Result 452262 states and 721025 transitions. [2020-12-22 07:23:08,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:23:08,977 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 141 [2020-12-22 07:23:08,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:23:09,551 INFO L225 Difference]: With dead ends: 452262 [2020-12-22 07:23:09,551 INFO L226 Difference]: Without dead ends: 300266 [2020-12-22 07:23:09,683 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:23:09,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300266 states. [2020-12-22 07:23:18,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300266 to 300264. [2020-12-22 07:23:18,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 300264 states. [2020-12-22 07:23:19,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300264 states to 300264 states and 476310 transitions. [2020-12-22 07:23:19,807 INFO L78 Accepts]: Start accepts. Automaton has 300264 states and 476310 transitions. Word has length 141 [2020-12-22 07:23:19,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:23:19,807 INFO L481 AbstractCegarLoop]: Abstraction has 300264 states and 476310 transitions. [2020-12-22 07:23:19,807 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:23:19,807 INFO L276 IsEmpty]: Start isEmpty. Operand 300264 states and 476310 transitions. [2020-12-22 07:23:19,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2020-12-22 07:23:19,814 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:23:19,814 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:23:19,814 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 07:23:19,814 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:23:19,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:23:19,815 INFO L82 PathProgramCache]: Analyzing trace with hash -1947387771, now seen corresponding path program 1 times [2020-12-22 07:23:19,815 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:23:19,815 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480072740] [2020-12-22 07:23:19,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:23:19,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:23:20,029 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:23:20,029 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480072740] [2020-12-22 07:23:20,029 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:23:20,029 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:23:20,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562060333] [2020-12-22 07:23:20,031 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:23:20,032 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:23:20,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:23:20,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:23:20,032 INFO L87 Difference]: Start difference. First operand 300264 states and 476310 transitions. Second operand 4 states. [2020-12-22 07:23:36,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:23:36,612 INFO L93 Difference]: Finished difference Result 893269 states and 1416691 transitions. [2020-12-22 07:23:36,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:23:36,612 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 143 [2020-12-22 07:23:36,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:23:38,046 INFO L225 Difference]: With dead ends: 893269 [2020-12-22 07:23:38,046 INFO L226 Difference]: Without dead ends: 593032 [2020-12-22 07:23:38,330 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:23:38,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 593032 states. [2020-12-22 07:24:01,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 593032 to 593030. [2020-12-22 07:24:01,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 593030 states. [2020-12-22 07:24:04,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 593030 states to 593030 states and 935723 transitions. [2020-12-22 07:24:04,220 INFO L78 Accepts]: Start accepts. Automaton has 593030 states and 935723 transitions. Word has length 143 [2020-12-22 07:24:04,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:24:04,247 INFO L481 AbstractCegarLoop]: Abstraction has 593030 states and 935723 transitions. [2020-12-22 07:24:04,248 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:24:04,248 INFO L276 IsEmpty]: Start isEmpty. Operand 593030 states and 935723 transitions. [2020-12-22 07:24:04,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2020-12-22 07:24:04,267 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:24:04,268 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:24:04,268 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 07:24:04,268 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:24:04,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:24:04,272 INFO L82 PathProgramCache]: Analyzing trace with hash 380264234, now seen corresponding path program 1 times [2020-12-22 07:24:04,272 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:24:04,272 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765285840] [2020-12-22 07:24:04,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:24:04,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:24:04,634 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:24:04,635 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765285840] [2020-12-22 07:24:04,635 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:24:04,636 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:24:04,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451802088] [2020-12-22 07:24:04,636 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:24:04,636 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:24:04,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:24:04,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:24:04,637 INFO L87 Difference]: Start difference. First operand 593030 states and 935723 transitions. Second operand 4 states. [2020-12-22 07:24:44,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:24:44,376 INFO L93 Difference]: Finished difference Result 1763882 states and 2782417 transitions. [2020-12-22 07:24:44,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:24:44,376 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 145 [2020-12-22 07:24:44,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:24:48,846 INFO L225 Difference]: With dead ends: 1763882 [2020-12-22 07:24:48,846 INFO L226 Difference]: Without dead ends: 1170988 [2020-12-22 07:24:49,491 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:24:51,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1170988 states.