/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/combinations/pals_lcr.7.ufo.BOUNDED-14.pals+Problem12_label08.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 10:13:42,062 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 10:13:42,065 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 10:13:42,104 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 10:13:42,104 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 10:13:42,106 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 10:13:42,107 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 10:13:42,110 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 10:13:42,112 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 10:13:42,113 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 10:13:42,114 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 10:13:42,116 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 10:13:42,116 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 10:13:42,117 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 10:13:42,119 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 10:13:42,120 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 10:13:42,121 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 10:13:42,122 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 10:13:42,124 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 10:13:42,126 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 10:13:42,128 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 10:13:42,130 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 10:13:42,131 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 10:13:42,132 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 10:13:42,135 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 10:13:42,139 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 10:13:42,140 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 10:13:42,141 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 10:13:42,143 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 10:13:42,146 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 10:13:42,146 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 10:13:42,147 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 10:13:42,147 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 10:13:42,148 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 10:13:42,149 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 10:13:42,151 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 10:13:42,154 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 10:13:42,199 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 10:13:42,200 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 10:13:42,201 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 10:13:42,201 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 10:13:42,201 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 10:13:42,202 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 10:13:42,202 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 10:13:42,202 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 10:13:42,202 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 10:13:42,202 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 10:13:42,203 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 10:13:42,203 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 10:13:42,203 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 10:13:42,203 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 10:13:42,203 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 10:13:42,204 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 10:13:42,204 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 10:13:42,204 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 10:13:42,206 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 10:13:42,206 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 10:13:42,207 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 10:13:42,207 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 10:13:42,207 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 10:13:42,207 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 10:13:42,207 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 10:13:42,207 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 10:13:42,632 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 10:13:42,661 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 10:13:42,664 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 10:13:42,665 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 10:13:42,666 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 10:13:42,667 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pals_lcr.7.ufo.BOUNDED-14.pals+Problem12_label08.c [2020-12-22 10:13:42,735 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/84287e9a5/4a7abee002004526af3b2e1ab62236fb/FLAG8ecd4122d [2020-12-22 10:13:43,770 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 10:13:43,771 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.7.ufo.BOUNDED-14.pals+Problem12_label08.c [2020-12-22 10:13:43,814 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/84287e9a5/4a7abee002004526af3b2e1ab62236fb/FLAG8ecd4122d [2020-12-22 10:13:44,172 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/84287e9a5/4a7abee002004526af3b2e1ab62236fb [2020-12-22 10:13:44,175 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 10:13:44,177 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 10:13:44,179 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 10:13:44,179 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 10:13:44,188 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 10:13:44,189 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 10:13:44" (1/1) ... [2020-12-22 10:13:44,191 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@79697ff1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:13:44, skipping insertion in model container [2020-12-22 10:13:44,191 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 10:13:44" (1/1) ... [2020-12-22 10:13:44,199 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 10:13:44,364 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 10:13:44,949 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/combinations/pals_lcr.7.ufo.BOUNDED-14.pals+Problem12_label08.c[20544,20557] [2020-12-22 10:13:44,996 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/combinations/pals_lcr.7.ufo.BOUNDED-14.pals+Problem12_label08.c[23808,23821] [2020-12-22 10:13:46,027 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 10:13:46,044 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 10:13:46,128 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/combinations/pals_lcr.7.ufo.BOUNDED-14.pals+Problem12_label08.c[20544,20557] [2020-12-22 10:13:46,137 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/combinations/pals_lcr.7.ufo.BOUNDED-14.pals+Problem12_label08.c[23808,23821] [2020-12-22 10:13:46,688 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 10:13:46,734 INFO L208 MainTranslator]: Completed translation [2020-12-22 10:13:46,734 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:13:46 WrapperNode [2020-12-22 10:13:46,735 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 10:13:46,737 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 10:13:46,743 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 10:13:46,743 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 10:13:46,752 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:13:46" (1/1) ... [2020-12-22 10:13:46,817 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:13:46" (1/1) ... [2020-12-22 10:13:47,238 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 10:13:47,240 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 10:13:47,240 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 10:13:47,240 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 10:13:47,250 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:13:46" (1/1) ... [2020-12-22 10:13:47,250 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:13:46" (1/1) ... [2020-12-22 10:13:47,290 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:13:46" (1/1) ... [2020-12-22 10:13:47,291 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:13:46" (1/1) ... [2020-12-22 10:13:47,580 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:13:46" (1/1) ... [2020-12-22 10:13:47,610 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:13:46" (1/1) ... [2020-12-22 10:13:47,712 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:13:46" (1/1) ... [2020-12-22 10:13:47,818 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 10:13:47,822 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 10:13:47,823 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 10:13:47,823 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 10:13:47,824 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:13:46" (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 10:13:48,059 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 10:13:48,059 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 10:13:48,059 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 10:13:48,061 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 10:13:53,501 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 10:13:53,502 INFO L299 CfgBuilder]: Removed 40 assume(true) statements. [2020-12-22 10:13:53,506 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 10:13:53 BoogieIcfgContainer [2020-12-22 10:13:53,507 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 10:13:53,511 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 10:13:53,513 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 10:13:53,516 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 10:13:53,517 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 10:13:44" (1/3) ... [2020-12-22 10:13:53,518 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56e73a85 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 10:13:53, skipping insertion in model container [2020-12-22 10:13:53,518 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:13:46" (2/3) ... [2020-12-22 10:13:53,518 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56e73a85 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 10:13:53, skipping insertion in model container [2020-12-22 10:13:53,518 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 10:13:53" (3/3) ... [2020-12-22 10:13:53,520 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.7.ufo.BOUNDED-14.pals+Problem12_label08.c [2020-12-22 10:13:53,530 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 10:13:53,536 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-22 10:13:53,555 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-22 10:13:53,605 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 10:13:53,605 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 10:13:53,605 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 10:13:53,605 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 10:13:53,605 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 10:13:53,610 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 10:13:53,610 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 10:13:53,610 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 10:13:53,644 INFO L276 IsEmpty]: Start isEmpty. Operand 944 states. [2020-12-22 10:13:53,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-12-22 10:13:53,654 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:13:53,655 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] [2020-12-22 10:13:53,655 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:13:53,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:13:53,662 INFO L82 PathProgramCache]: Analyzing trace with hash -553137427, now seen corresponding path program 1 times [2020-12-22 10:13:53,672 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:13:53,672 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679894231] [2020-12-22 10:13:53,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:13:53,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:13:54,106 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 10:13:54,107 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679894231] [2020-12-22 10:13:54,108 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:13:54,108 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 10:13:54,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38114700] [2020-12-22 10:13:54,114 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:13:54,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:13:54,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:13:54,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:13:54,131 INFO L87 Difference]: Start difference. First operand 944 states. Second operand 3 states. [2020-12-22 10:13:59,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:13:59,731 INFO L93 Difference]: Finished difference Result 2587 states and 4966 transitions. [2020-12-22 10:13:59,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:13:59,734 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 30 [2020-12-22 10:13:59,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:13:59,773 INFO L225 Difference]: With dead ends: 2587 [2020-12-22 10:13:59,773 INFO L226 Difference]: Without dead ends: 1629 [2020-12-22 10:13:59,783 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 10:13:59,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1629 states. [2020-12-22 10:13:59,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1629 to 1629. [2020-12-22 10:13:59,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1629 states. [2020-12-22 10:13:59,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1629 states to 1629 states and 2680 transitions. [2020-12-22 10:13:59,933 INFO L78 Accepts]: Start accepts. Automaton has 1629 states and 2680 transitions. Word has length 30 [2020-12-22 10:13:59,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:13:59,934 INFO L481 AbstractCegarLoop]: Abstraction has 1629 states and 2680 transitions. [2020-12-22 10:13:59,934 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:13:59,935 INFO L276 IsEmpty]: Start isEmpty. Operand 1629 states and 2680 transitions. [2020-12-22 10:13:59,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-12-22 10:13:59,943 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:13:59,944 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] [2020-12-22 10:13:59,944 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 10:13:59,944 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:13:59,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:13:59,947 INFO L82 PathProgramCache]: Analyzing trace with hash 325703937, now seen corresponding path program 1 times [2020-12-22 10:13:59,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:13:59,948 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942368512] [2020-12-22 10:13:59,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:14:00,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:14:00,140 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 10:14:00,141 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942368512] [2020-12-22 10:14:00,142 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:14:00,142 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 10:14:00,143 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270058810] [2020-12-22 10:14:00,144 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 10:14:00,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:14:00,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 10:14:00,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 10:14:00,146 INFO L87 Difference]: Start difference. First operand 1629 states and 2680 transitions. Second operand 5 states. [2020-12-22 10:14:00,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:14:00,278 INFO L93 Difference]: Finished difference Result 1701 states and 2792 transitions. [2020-12-22 10:14:00,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 10:14:00,279 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 42 [2020-12-22 10:14:00,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:14:00,289 INFO L225 Difference]: With dead ends: 1701 [2020-12-22 10:14:00,289 INFO L226 Difference]: Without dead ends: 1629 [2020-12-22 10:14:00,293 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 10:14:00,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1629 states. [2020-12-22 10:14:00,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1629 to 1629. [2020-12-22 10:14:00,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1629 states. [2020-12-22 10:14:00,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1629 states to 1629 states and 2630 transitions. [2020-12-22 10:14:00,350 INFO L78 Accepts]: Start accepts. Automaton has 1629 states and 2630 transitions. Word has length 42 [2020-12-22 10:14:00,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:14:00,350 INFO L481 AbstractCegarLoop]: Abstraction has 1629 states and 2630 transitions. [2020-12-22 10:14:00,350 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 10:14:00,351 INFO L276 IsEmpty]: Start isEmpty. Operand 1629 states and 2630 transitions. [2020-12-22 10:14:00,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-12-22 10:14:00,358 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:14:00,358 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] [2020-12-22 10:14:00,359 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 10:14:00,360 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:14:00,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:14:00,361 INFO L82 PathProgramCache]: Analyzing trace with hash 1207745120, now seen corresponding path program 1 times [2020-12-22 10:14:00,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:14:00,362 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765004574] [2020-12-22 10:14:00,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:14:00,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:14:00,525 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:14:00,525 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765004574] [2020-12-22 10:14:00,525 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:14:00,526 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:14:00,526 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662466558] [2020-12-22 10:14:00,527 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:14:00,527 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:14:00,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:14:00,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:14:00,528 INFO L87 Difference]: Start difference. First operand 1629 states and 2630 transitions. Second operand 3 states. [2020-12-22 10:14:00,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:14:00,574 INFO L93 Difference]: Finished difference Result 1759 states and 2836 transitions. [2020-12-22 10:14:00,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:14:00,575 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 91 [2020-12-22 10:14:00,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:14:00,585 INFO L225 Difference]: With dead ends: 1759 [2020-12-22 10:14:00,585 INFO L226 Difference]: Without dead ends: 1691 [2020-12-22 10:14:00,586 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 10:14:00,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1691 states. [2020-12-22 10:14:00,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1691 to 1689. [2020-12-22 10:14:00,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1689 states. [2020-12-22 10:14:00,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1689 states to 1689 states and 2726 transitions. [2020-12-22 10:14:00,630 INFO L78 Accepts]: Start accepts. Automaton has 1689 states and 2726 transitions. Word has length 91 [2020-12-22 10:14:00,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:14:00,631 INFO L481 AbstractCegarLoop]: Abstraction has 1689 states and 2726 transitions. [2020-12-22 10:14:00,631 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:14:00,631 INFO L276 IsEmpty]: Start isEmpty. Operand 1689 states and 2726 transitions. [2020-12-22 10:14:00,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-12-22 10:14:00,632 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:14:00,633 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] [2020-12-22 10:14:00,633 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 10:14:00,633 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:14:00,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:14:00,634 INFO L82 PathProgramCache]: Analyzing trace with hash -1564953708, now seen corresponding path program 1 times [2020-12-22 10:14:00,634 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:14:00,634 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247858896] [2020-12-22 10:14:00,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:14:00,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:14:00,727 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 10:14:00,728 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247858896] [2020-12-22 10:14:00,728 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:14:00,728 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:14:00,729 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422593788] [2020-12-22 10:14:00,729 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:14:00,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:14:00,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:14:00,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:14:00,730 INFO L87 Difference]: Start difference. First operand 1689 states and 2726 transitions. Second operand 3 states. [2020-12-22 10:14:00,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:14:00,774 INFO L93 Difference]: Finished difference Result 1933 states and 3114 transitions. [2020-12-22 10:14:00,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:14:00,775 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 91 [2020-12-22 10:14:00,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:14:00,785 INFO L225 Difference]: With dead ends: 1933 [2020-12-22 10:14:00,785 INFO L226 Difference]: Without dead ends: 1805 [2020-12-22 10:14:00,787 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 10:14:00,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1805 states. [2020-12-22 10:14:00,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1805 to 1803. [2020-12-22 10:14:00,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1803 states. [2020-12-22 10:14:00,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1803 states to 1803 states and 2907 transitions. [2020-12-22 10:14:00,837 INFO L78 Accepts]: Start accepts. Automaton has 1803 states and 2907 transitions. Word has length 91 [2020-12-22 10:14:00,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:14:00,837 INFO L481 AbstractCegarLoop]: Abstraction has 1803 states and 2907 transitions. [2020-12-22 10:14:00,838 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:14:00,838 INFO L276 IsEmpty]: Start isEmpty. Operand 1803 states and 2907 transitions. [2020-12-22 10:14:00,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-12-22 10:14:00,839 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:14:00,839 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] [2020-12-22 10:14:00,839 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 10:14:00,840 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:14:00,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:14:00,840 INFO L82 PathProgramCache]: Analyzing trace with hash 1479108296, now seen corresponding path program 1 times [2020-12-22 10:14:00,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:14:00,841 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352409569] [2020-12-22 10:14:00,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:14:00,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:14:00,920 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 10:14:00,920 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352409569] [2020-12-22 10:14:00,920 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:14:00,921 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:14:00,921 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137896853] [2020-12-22 10:14:00,921 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:14:00,922 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:14:00,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:14:00,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:14:00,923 INFO L87 Difference]: Start difference. First operand 1803 states and 2907 transitions. Second operand 3 states. [2020-12-22 10:14:00,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:14:00,971 INFO L93 Difference]: Finished difference Result 2263 states and 3637 transitions. [2020-12-22 10:14:00,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:14:00,972 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 91 [2020-12-22 10:14:00,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:14:00,983 INFO L225 Difference]: With dead ends: 2263 [2020-12-22 10:14:00,983 INFO L226 Difference]: Without dead ends: 2021 [2020-12-22 10:14:00,985 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 10:14:00,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2021 states. [2020-12-22 10:14:01,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2021 to 2019. [2020-12-22 10:14:01,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2019 states. [2020-12-22 10:14:01,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2019 states to 2019 states and 3247 transitions. [2020-12-22 10:14:01,038 INFO L78 Accepts]: Start accepts. Automaton has 2019 states and 3247 transitions. Word has length 91 [2020-12-22 10:14:01,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:14:01,039 INFO L481 AbstractCegarLoop]: Abstraction has 2019 states and 3247 transitions. [2020-12-22 10:14:01,039 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:14:01,039 INFO L276 IsEmpty]: Start isEmpty. Operand 2019 states and 3247 transitions. [2020-12-22 10:14:01,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-12-22 10:14:01,040 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:14:01,040 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] [2020-12-22 10:14:01,041 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 10:14:01,041 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:14:01,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:14:01,041 INFO L82 PathProgramCache]: Analyzing trace with hash 733525566, now seen corresponding path program 1 times [2020-12-22 10:14:01,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:14:01,042 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179184104] [2020-12-22 10:14:01,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:14:01,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:14:01,116 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 10:14:01,117 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179184104] [2020-12-22 10:14:01,117 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:14:01,117 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:14:01,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638071552] [2020-12-22 10:14:01,118 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:14:01,118 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:14:01,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:14:01,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:14:01,119 INFO L87 Difference]: Start difference. First operand 2019 states and 3247 transitions. Second operand 3 states. [2020-12-22 10:14:01,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:14:01,177 INFO L93 Difference]: Finished difference Result 2887 states and 4617 transitions. [2020-12-22 10:14:01,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:14:01,178 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 91 [2020-12-22 10:14:01,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:14:01,191 INFO L225 Difference]: With dead ends: 2887 [2020-12-22 10:14:01,191 INFO L226 Difference]: Without dead ends: 2429 [2020-12-22 10:14:01,193 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 10:14:01,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2429 states. [2020-12-22 10:14:01,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2429 to 2427. [2020-12-22 10:14:01,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2427 states. [2020-12-22 10:14:01,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2427 states to 2427 states and 3883 transitions. [2020-12-22 10:14:01,310 INFO L78 Accepts]: Start accepts. Automaton has 2427 states and 3883 transitions. Word has length 91 [2020-12-22 10:14:01,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:14:01,311 INFO L481 AbstractCegarLoop]: Abstraction has 2427 states and 3883 transitions. [2020-12-22 10:14:01,311 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:14:01,311 INFO L276 IsEmpty]: Start isEmpty. Operand 2427 states and 3883 transitions. [2020-12-22 10:14:01,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-12-22 10:14:01,312 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:14:01,313 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] [2020-12-22 10:14:01,313 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 10:14:01,314 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:14:01,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:14:01,318 INFO L82 PathProgramCache]: Analyzing trace with hash -1206505292, now seen corresponding path program 1 times [2020-12-22 10:14:01,319 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:14:01,319 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249687324] [2020-12-22 10:14:01,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:14:01,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:14:01,422 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 10:14:01,422 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249687324] [2020-12-22 10:14:01,422 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:14:01,422 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:14:01,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198692370] [2020-12-22 10:14:01,423 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:14:01,423 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:14:01,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:14:01,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:14:01,424 INFO L87 Difference]: Start difference. First operand 2427 states and 3883 transitions. Second operand 3 states. [2020-12-22 10:14:01,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:14:01,506 INFO L93 Difference]: Finished difference Result 4063 states and 6445 transitions. [2020-12-22 10:14:01,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:14:01,507 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 91 [2020-12-22 10:14:01,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:14:01,523 INFO L225 Difference]: With dead ends: 4063 [2020-12-22 10:14:01,524 INFO L226 Difference]: Without dead ends: 3197 [2020-12-22 10:14:01,526 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 10:14:01,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3197 states. [2020-12-22 10:14:01,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3197 to 3195. [2020-12-22 10:14:01,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3195 states. [2020-12-22 10:14:01,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3195 states to 3195 states and 5067 transitions. [2020-12-22 10:14:01,628 INFO L78 Accepts]: Start accepts. Automaton has 3195 states and 5067 transitions. Word has length 91 [2020-12-22 10:14:01,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:14:01,628 INFO L481 AbstractCegarLoop]: Abstraction has 3195 states and 5067 transitions. [2020-12-22 10:14:01,628 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:14:01,629 INFO L276 IsEmpty]: Start isEmpty. Operand 3195 states and 5067 transitions. [2020-12-22 10:14:01,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-12-22 10:14:01,630 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:14:01,630 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:14:01,630 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 10:14:01,630 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:14:01,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:14:01,631 INFO L82 PathProgramCache]: Analyzing trace with hash 1494177322, now seen corresponding path program 1 times [2020-12-22 10:14:01,631 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:14:01,632 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175400805] [2020-12-22 10:14:01,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:14:01,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:14:01,800 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 10:14:01,800 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175400805] [2020-12-22 10:14:01,800 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:14:01,801 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 10:14:01,801 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386983636] [2020-12-22 10:14:01,801 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 10:14:01,802 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:14:01,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 10:14:01,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:14:01,803 INFO L87 Difference]: Start difference. First operand 3195 states and 5067 transitions. Second operand 9 states. [2020-12-22 10:14:03,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:14:03,065 INFO L93 Difference]: Finished difference Result 26071 states and 40697 transitions. [2020-12-22 10:14:03,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-22 10:14:03,066 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 91 [2020-12-22 10:14:03,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:14:03,181 INFO L225 Difference]: With dead ends: 26071 [2020-12-22 10:14:03,181 INFO L226 Difference]: Without dead ends: 24437 [2020-12-22 10:14:03,195 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=124, Invalid=256, Unknown=0, NotChecked=0, Total=380 [2020-12-22 10:14:03,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24437 states. [2020-12-22 10:14:03,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24437 to 4827. [2020-12-22 10:14:03,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4827 states. [2020-12-22 10:14:03,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4827 states to 4827 states and 7547 transitions. [2020-12-22 10:14:03,797 INFO L78 Accepts]: Start accepts. Automaton has 4827 states and 7547 transitions. Word has length 91 [2020-12-22 10:14:03,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:14:03,797 INFO L481 AbstractCegarLoop]: Abstraction has 4827 states and 7547 transitions. [2020-12-22 10:14:03,797 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 10:14:03,797 INFO L276 IsEmpty]: Start isEmpty. Operand 4827 states and 7547 transitions. [2020-12-22 10:14:03,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-12-22 10:14:03,798 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:14:03,798 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] [2020-12-22 10:14:03,799 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 10:14:03,799 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:14:03,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:14:03,799 INFO L82 PathProgramCache]: Analyzing trace with hash -30360326, now seen corresponding path program 1 times [2020-12-22 10:14:03,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:14:03,804 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903310127] [2020-12-22 10:14:03,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:14:03,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:14:03,899 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 10:14:03,899 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903310127] [2020-12-22 10:14:03,901 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:14:03,901 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:14:03,901 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108889602] [2020-12-22 10:14:03,902 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:14:03,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:14:03,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:14:03,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:14:03,903 INFO L87 Difference]: Start difference. First operand 4827 states and 7547 transitions. Second operand 3 states. [2020-12-22 10:14:04,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:14:04,211 INFO L93 Difference]: Finished difference Result 9649 states and 14959 transitions. [2020-12-22 10:14:04,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:14:04,212 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 93 [2020-12-22 10:14:04,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:14:04,228 INFO L225 Difference]: With dead ends: 9649 [2020-12-22 10:14:04,228 INFO L226 Difference]: Without dead ends: 6383 [2020-12-22 10:14:04,235 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 10:14:04,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6383 states. [2020-12-22 10:14:04,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6383 to 6381. [2020-12-22 10:14:04,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6381 states. [2020-12-22 10:14:04,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6381 states to 6381 states and 9885 transitions. [2020-12-22 10:14:04,579 INFO L78 Accepts]: Start accepts. Automaton has 6381 states and 9885 transitions. Word has length 93 [2020-12-22 10:14:04,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:14:04,579 INFO L481 AbstractCegarLoop]: Abstraction has 6381 states and 9885 transitions. [2020-12-22 10:14:04,579 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:14:04,579 INFO L276 IsEmpty]: Start isEmpty. Operand 6381 states and 9885 transitions. [2020-12-22 10:14:04,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-12-22 10:14:04,584 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:14:04,584 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:14:04,584 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 10:14:04,584 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:14:04,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:14:04,585 INFO L82 PathProgramCache]: Analyzing trace with hash 36133186, now seen corresponding path program 1 times [2020-12-22 10:14:04,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:14:04,585 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501202446] [2020-12-22 10:14:04,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:14:04,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:14:04,941 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 10:14:04,942 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501202446] [2020-12-22 10:14:04,942 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:14:04,942 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 10:14:04,943 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743820997] [2020-12-22 10:14:04,943 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 10:14:04,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:14:04,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 10:14:04,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:14:04,944 INFO L87 Difference]: Start difference. First operand 6381 states and 9885 transitions. Second operand 9 states. [2020-12-22 10:14:05,123 WARN L197 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-12-22 10:14:05,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:14:05,751 INFO L93 Difference]: Finished difference Result 11201 states and 17247 transitions. [2020-12-22 10:14:05,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 10:14:05,752 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 93 [2020-12-22 10:14:05,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:14:05,769 INFO L225 Difference]: With dead ends: 11201 [2020-12-22 10:14:05,769 INFO L226 Difference]: Without dead ends: 6383 [2020-12-22 10:14:05,779 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2020-12-22 10:14:05,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6383 states. [2020-12-22 10:14:06,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6383 to 6381. [2020-12-22 10:14:06,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6381 states. [2020-12-22 10:14:06,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6381 states to 6381 states and 9837 transitions. [2020-12-22 10:14:06,110 INFO L78 Accepts]: Start accepts. Automaton has 6381 states and 9837 transitions. Word has length 93 [2020-12-22 10:14:06,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:14:06,111 INFO L481 AbstractCegarLoop]: Abstraction has 6381 states and 9837 transitions. [2020-12-22 10:14:06,111 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 10:14:06,111 INFO L276 IsEmpty]: Start isEmpty. Operand 6381 states and 9837 transitions. [2020-12-22 10:14:06,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-12-22 10:14:06,112 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:14:06,113 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] [2020-12-22 10:14:06,113 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 10:14:06,113 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:14:06,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:14:06,113 INFO L82 PathProgramCache]: Analyzing trace with hash 1825047262, now seen corresponding path program 1 times [2020-12-22 10:14:06,114 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:14:06,114 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442853668] [2020-12-22 10:14:06,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:14:06,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:14:06,200 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 10:14:06,201 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442853668] [2020-12-22 10:14:06,201 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:14:06,201 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:14:06,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629552332] [2020-12-22 10:14:06,202 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:14:06,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:14:06,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:14:06,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:14:06,205 INFO L87 Difference]: Start difference. First operand 6381 states and 9837 transitions. Second operand 3 states. [2020-12-22 10:14:06,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:14:06,754 INFO L93 Difference]: Finished difference Result 15441 states and 23503 transitions. [2020-12-22 10:14:06,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:14:06,755 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 93 [2020-12-22 10:14:06,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:14:06,779 INFO L225 Difference]: With dead ends: 15441 [2020-12-22 10:14:06,779 INFO L226 Difference]: Without dead ends: 10623 [2020-12-22 10:14:06,788 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 10:14:06,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10623 states. [2020-12-22 10:14:07,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10623 to 10621. [2020-12-22 10:14:07,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10621 states. [2020-12-22 10:14:07,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10621 states to 10621 states and 16093 transitions. [2020-12-22 10:14:07,508 INFO L78 Accepts]: Start accepts. Automaton has 10621 states and 16093 transitions. Word has length 93 [2020-12-22 10:14:07,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:14:07,508 INFO L481 AbstractCegarLoop]: Abstraction has 10621 states and 16093 transitions. [2020-12-22 10:14:07,509 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:14:07,509 INFO L276 IsEmpty]: Start isEmpty. Operand 10621 states and 16093 transitions. [2020-12-22 10:14:07,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-12-22 10:14:07,510 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:14:07,510 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] [2020-12-22 10:14:07,510 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 10:14:07,511 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:14:07,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:14:07,511 INFO L82 PathProgramCache]: Analyzing trace with hash -1222412418, now seen corresponding path program 1 times [2020-12-22 10:14:07,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:14:07,512 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524978939] [2020-12-22 10:14:07,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:14:07,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:14:07,613 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 10:14:07,614 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524978939] [2020-12-22 10:14:07,614 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:14:07,614 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:14:07,614 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261170785] [2020-12-22 10:14:07,615 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:14:07,615 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:14:07,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:14:07,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:14:07,616 INFO L87 Difference]: Start difference. First operand 10621 states and 16093 transitions. Second operand 3 states. [2020-12-22 10:14:08,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:14:08,618 INFO L93 Difference]: Finished difference Result 27585 states and 41311 transitions. [2020-12-22 10:14:08,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:14:08,619 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 93 [2020-12-22 10:14:08,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:14:08,661 INFO L225 Difference]: With dead ends: 27585 [2020-12-22 10:14:08,661 INFO L226 Difference]: Without dead ends: 18527 [2020-12-22 10:14:08,680 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 10:14:08,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18527 states. [2020-12-22 10:14:09,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18527 to 18525. [2020-12-22 10:14:09,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18525 states. [2020-12-22 10:14:09,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18525 states to 18525 states and 27549 transitions. [2020-12-22 10:14:09,849 INFO L78 Accepts]: Start accepts. Automaton has 18525 states and 27549 transitions. Word has length 93 [2020-12-22 10:14:09,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:14:09,849 INFO L481 AbstractCegarLoop]: Abstraction has 18525 states and 27549 transitions. [2020-12-22 10:14:09,849 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:14:09,850 INFO L276 IsEmpty]: Start isEmpty. Operand 18525 states and 27549 transitions. [2020-12-22 10:14:09,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-12-22 10:14:09,851 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:14:09,851 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] [2020-12-22 10:14:09,851 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 10:14:09,851 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:14:09,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:14:09,852 INFO L82 PathProgramCache]: Analyzing trace with hash 705405902, now seen corresponding path program 1 times [2020-12-22 10:14:09,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:14:09,853 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472807841] [2020-12-22 10:14:09,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:14:09,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:14:09,955 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 10:14:09,956 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472807841] [2020-12-22 10:14:09,956 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:14:09,956 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 10:14:09,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906794963] [2020-12-22 10:14:09,957 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 10:14:09,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:14:09,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 10:14:09,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 10:14:09,958 INFO L87 Difference]: Start difference. First operand 18525 states and 27549 transitions. Second operand 6 states. [2020-12-22 10:14:11,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:14:11,401 INFO L93 Difference]: Finished difference Result 35487 states and 52574 transitions. [2020-12-22 10:14:11,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 10:14:11,402 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 94 [2020-12-22 10:14:11,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:14:11,440 INFO L225 Difference]: With dead ends: 35487 [2020-12-22 10:14:11,441 INFO L226 Difference]: Without dead ends: 18525 [2020-12-22 10:14:11,463 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:14:11,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18525 states. [2020-12-22 10:14:12,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18525 to 18525. [2020-12-22 10:14:12,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18525 states. [2020-12-22 10:14:12,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18525 states to 18525 states and 27293 transitions. [2020-12-22 10:14:12,620 INFO L78 Accepts]: Start accepts. Automaton has 18525 states and 27293 transitions. Word has length 94 [2020-12-22 10:14:12,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:14:12,620 INFO L481 AbstractCegarLoop]: Abstraction has 18525 states and 27293 transitions. [2020-12-22 10:14:12,620 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 10:14:12,620 INFO L276 IsEmpty]: Start isEmpty. Operand 18525 states and 27293 transitions. [2020-12-22 10:14:12,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-12-22 10:14:12,621 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:14:12,622 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] [2020-12-22 10:14:12,622 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 10:14:12,622 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:14:12,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:14:12,623 INFO L82 PathProgramCache]: Analyzing trace with hash 1549411404, now seen corresponding path program 1 times [2020-12-22 10:14:12,623 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:14:12,623 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265717822] [2020-12-22 10:14:12,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:14:12,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:14:12,721 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 10:14:12,722 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265717822] [2020-12-22 10:14:12,722 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:14:12,722 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 10:14:12,722 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126334873] [2020-12-22 10:14:12,723 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 10:14:12,723 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:14:12,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 10:14:12,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 10:14:12,724 INFO L87 Difference]: Start difference. First operand 18525 states and 27293 transitions. Second operand 6 states. [2020-12-22 10:14:13,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:14:13,757 INFO L93 Difference]: Finished difference Result 35487 states and 52062 transitions. [2020-12-22 10:14:13,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 10:14:13,758 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 94 [2020-12-22 10:14:13,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:14:13,797 INFO L225 Difference]: With dead ends: 35487 [2020-12-22 10:14:13,798 INFO L226 Difference]: Without dead ends: 18525 [2020-12-22 10:14:13,818 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:14:13,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18525 states. [2020-12-22 10:14:14,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18525 to 18525. [2020-12-22 10:14:14,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18525 states. [2020-12-22 10:14:14,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18525 states to 18525 states and 27101 transitions. [2020-12-22 10:14:14,799 INFO L78 Accepts]: Start accepts. Automaton has 18525 states and 27101 transitions. Word has length 94 [2020-12-22 10:14:14,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:14:14,799 INFO L481 AbstractCegarLoop]: Abstraction has 18525 states and 27101 transitions. [2020-12-22 10:14:14,799 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 10:14:14,799 INFO L276 IsEmpty]: Start isEmpty. Operand 18525 states and 27101 transitions. [2020-12-22 10:14:14,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-12-22 10:14:14,800 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:14:14,800 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:14:14,801 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 10:14:14,801 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:14:14,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:14:14,802 INFO L82 PathProgramCache]: Analyzing trace with hash 847811530, now seen corresponding path program 1 times [2020-12-22 10:14:14,802 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:14:14,802 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272261580] [2020-12-22 10:14:14,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:14:14,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:14:15,023 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 10:14:15,023 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272261580] [2020-12-22 10:14:15,023 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:14:15,023 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 10:14:15,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726462683] [2020-12-22 10:14:15,024 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 10:14:15,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:14:15,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 10:14:15,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-12-22 10:14:15,025 INFO L87 Difference]: Start difference. First operand 18525 states and 27101 transitions. Second operand 8 states. [2020-12-22 10:14:16,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:14:16,920 INFO L93 Difference]: Finished difference Result 33024 states and 47751 transitions. [2020-12-22 10:14:16,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 10:14:16,921 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 94 [2020-12-22 10:14:16,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:14:16,977 INFO L225 Difference]: With dead ends: 33024 [2020-12-22 10:14:16,977 INFO L226 Difference]: Without dead ends: 33022 [2020-12-22 10:14:16,984 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2020-12-22 10:14:17,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33022 states. [2020-12-22 10:14:18,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33022 to 19293. [2020-12-22 10:14:18,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19293 states. [2020-12-22 10:14:18,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19293 states to 19293 states and 27805 transitions. [2020-12-22 10:14:18,182 INFO L78 Accepts]: Start accepts. Automaton has 19293 states and 27805 transitions. Word has length 94 [2020-12-22 10:14:18,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:14:18,183 INFO L481 AbstractCegarLoop]: Abstraction has 19293 states and 27805 transitions. [2020-12-22 10:14:18,183 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 10:14:18,183 INFO L276 IsEmpty]: Start isEmpty. Operand 19293 states and 27805 transitions. [2020-12-22 10:14:18,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-12-22 10:14:18,184 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:14:18,184 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:14:18,184 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 10:14:18,184 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:14:18,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:14:18,185 INFO L82 PathProgramCache]: Analyzing trace with hash -9059566, now seen corresponding path program 1 times [2020-12-22 10:14:18,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:14:18,185 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553595456] [2020-12-22 10:14:18,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:14:18,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:14:18,270 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-12-22 10:14:18,270 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553595456] [2020-12-22 10:14:18,270 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:14:18,270 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 10:14:18,271 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137795597] [2020-12-22 10:14:18,271 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:14:18,271 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:14:18,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:14:18,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:14:18,272 INFO L87 Difference]: Start difference. First operand 19293 states and 27805 transitions. Second operand 3 states. [2020-12-22 10:14:25,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:14:25,066 INFO L93 Difference]: Finished difference Result 22299 states and 32732 transitions. [2020-12-22 10:14:25,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:14:25,067 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 101 [2020-12-22 10:14:25,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:14:25,101 INFO L225 Difference]: With dead ends: 22299 [2020-12-22 10:14:25,101 INFO L226 Difference]: Without dead ends: 20795 [2020-12-22 10:14:25,107 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 10:14:25,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20795 states. [2020-12-22 10:14:26,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20795 to 20795. [2020-12-22 10:14:26,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20795 states. [2020-12-22 10:14:26,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20795 states to 20795 states and 29625 transitions. [2020-12-22 10:14:26,296 INFO L78 Accepts]: Start accepts. Automaton has 20795 states and 29625 transitions. Word has length 101 [2020-12-22 10:14:26,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:14:26,297 INFO L481 AbstractCegarLoop]: Abstraction has 20795 states and 29625 transitions. [2020-12-22 10:14:26,297 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:14:26,297 INFO L276 IsEmpty]: Start isEmpty. Operand 20795 states and 29625 transitions. [2020-12-22 10:14:26,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-12-22 10:14:26,298 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:14:26,299 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:14:26,299 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 10:14:26,299 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:14:26,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:14:26,299 INFO L82 PathProgramCache]: Analyzing trace with hash -1971738468, now seen corresponding path program 1 times [2020-12-22 10:14:26,300 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:14:26,300 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260939915] [2020-12-22 10:14:26,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:14:26,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:14:26,375 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:14:26,376 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260939915] [2020-12-22 10:14:26,376 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:14:26,376 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 10:14:26,376 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337590599] [2020-12-22 10:14:26,377 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:14:26,377 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:14:26,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:14:26,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:14:26,378 INFO L87 Difference]: Start difference. First operand 20795 states and 29625 transitions. Second operand 3 states. [2020-12-22 10:14:33,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:14:33,012 INFO L93 Difference]: Finished difference Result 26807 states and 38193 transitions. [2020-12-22 10:14:33,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:14:33,013 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 105 [2020-12-22 10:14:33,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:14:33,052 INFO L225 Difference]: With dead ends: 26807 [2020-12-22 10:14:33,053 INFO L226 Difference]: Without dead ends: 23801 [2020-12-22 10:14:33,062 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 10:14:33,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23801 states. [2020-12-22 10:14:34,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23801 to 23799. [2020-12-22 10:14:34,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23799 states. [2020-12-22 10:14:34,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23799 states to 23799 states and 33326 transitions. [2020-12-22 10:14:34,349 INFO L78 Accepts]: Start accepts. Automaton has 23799 states and 33326 transitions. Word has length 105 [2020-12-22 10:14:34,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:14:34,349 INFO L481 AbstractCegarLoop]: Abstraction has 23799 states and 33326 transitions. [2020-12-22 10:14:34,349 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:14:34,350 INFO L276 IsEmpty]: Start isEmpty. Operand 23799 states and 33326 transitions. [2020-12-22 10:14:34,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-12-22 10:14:34,361 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:14:34,361 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:14:34,362 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 10:14:34,362 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:14:34,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:14:34,362 INFO L82 PathProgramCache]: Analyzing trace with hash 101873069, now seen corresponding path program 1 times [2020-12-22 10:14:34,363 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:14:34,363 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569556085] [2020-12-22 10:14:34,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:14:34,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:14:34,532 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-12-22 10:14:34,533 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569556085] [2020-12-22 10:14:34,533 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:14:34,533 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 10:14:34,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893608563] [2020-12-22 10:14:34,534 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 10:14:34,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:14:34,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 10:14:34,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:14:34,535 INFO L87 Difference]: Start difference. First operand 23799 states and 33326 transitions. Second operand 9 states. [2020-12-22 10:14:41,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:14:41,910 INFO L93 Difference]: Finished difference Result 151367 states and 215062 transitions. [2020-12-22 10:14:41,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 10:14:41,911 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 130 [2020-12-22 10:14:41,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:14:42,222 INFO L225 Difference]: With dead ends: 151367 [2020-12-22 10:14:42,223 INFO L226 Difference]: Without dead ends: 133637 [2020-12-22 10:14:42,279 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-12-22 10:14:42,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133637 states. [2020-12-22 10:14:45,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133637 to 41527. [2020-12-22 10:14:45,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41527 states. [2020-12-22 10:14:45,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41527 states to 41527 states and 58414 transitions. [2020-12-22 10:14:45,465 INFO L78 Accepts]: Start accepts. Automaton has 41527 states and 58414 transitions. Word has length 130 [2020-12-22 10:14:45,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:14:45,466 INFO L481 AbstractCegarLoop]: Abstraction has 41527 states and 58414 transitions. [2020-12-22 10:14:45,466 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 10:14:45,466 INFO L276 IsEmpty]: Start isEmpty. Operand 41527 states and 58414 transitions. [2020-12-22 10:14:45,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-12-22 10:14:45,481 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:14:45,481 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:14:45,482 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 10:14:45,482 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:14:45,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:14:45,482 INFO L82 PathProgramCache]: Analyzing trace with hash 1349380685, now seen corresponding path program 1 times [2020-12-22 10:14:45,483 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:14:45,483 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358789909] [2020-12-22 10:14:45,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:14:45,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:14:45,778 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-12-22 10:14:45,778 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358789909] [2020-12-22 10:14:45,778 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:14:45,778 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 10:14:45,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608022511] [2020-12-22 10:14:45,779 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 10:14:45,779 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:14:45,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 10:14:45,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:14:45,780 INFO L87 Difference]: Start difference. First operand 41527 states and 58414 transitions. Second operand 9 states. [2020-12-22 10:14:55,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:14:55,241 INFO L93 Difference]: Finished difference Result 169095 states and 240150 transitions. [2020-12-22 10:14:55,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 10:14:55,242 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 130 [2020-12-22 10:14:55,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:14:55,442 INFO L225 Difference]: With dead ends: 169095 [2020-12-22 10:14:55,443 INFO L226 Difference]: Without dead ends: 151365 [2020-12-22 10:14:55,481 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-12-22 10:14:55,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151365 states. [2020-12-22 10:15:00,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151365 to 68151. [2020-12-22 10:15:00,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68151 states. [2020-12-22 10:15:00,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68151 states to 68151 states and 95886 transitions. [2020-12-22 10:15:00,724 INFO L78 Accepts]: Start accepts. Automaton has 68151 states and 95886 transitions. Word has length 130 [2020-12-22 10:15:00,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:15:00,725 INFO L481 AbstractCegarLoop]: Abstraction has 68151 states and 95886 transitions. [2020-12-22 10:15:00,726 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 10:15:00,726 INFO L276 IsEmpty]: Start isEmpty. Operand 68151 states and 95886 transitions. [2020-12-22 10:15:00,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-12-22 10:15:00,740 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:15:00,740 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:15:00,740 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 10:15:00,740 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:15:00,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:15:00,741 INFO L82 PathProgramCache]: Analyzing trace with hash -1476153629, now seen corresponding path program 1 times [2020-12-22 10:15:00,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:15:00,741 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204991880] [2020-12-22 10:15:00,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:15:00,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:15:00,914 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-12-22 10:15:00,915 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204991880] [2020-12-22 10:15:00,915 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:15:00,915 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 10:15:00,915 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739313111] [2020-12-22 10:15:00,915 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 10:15:00,916 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:15:00,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 10:15:00,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:15:00,917 INFO L87 Difference]: Start difference. First operand 68151 states and 95886 transitions. Second operand 9 states. [2020-12-22 10:15:12,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:15:12,233 INFO L93 Difference]: Finished difference Result 186823 states and 265238 transitions. [2020-12-22 10:15:12,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 10:15:12,241 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 130 [2020-12-22 10:15:12,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:15:12,446 INFO L225 Difference]: With dead ends: 186823 [2020-12-22 10:15:12,446 INFO L226 Difference]: Without dead ends: 169093 [2020-12-22 10:15:12,493 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-12-22 10:15:12,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169093 states. [2020-12-22 10:15:19,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169093 to 85879. [2020-12-22 10:15:19,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85879 states. [2020-12-22 10:15:19,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85879 states to 85879 states and 120974 transitions. [2020-12-22 10:15:19,200 INFO L78 Accepts]: Start accepts. Automaton has 85879 states and 120974 transitions. Word has length 130 [2020-12-22 10:15:19,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:15:19,201 INFO L481 AbstractCegarLoop]: Abstraction has 85879 states and 120974 transitions. [2020-12-22 10:15:19,201 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 10:15:19,201 INFO L276 IsEmpty]: Start isEmpty. Operand 85879 states and 120974 transitions. [2020-12-22 10:15:19,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-12-22 10:15:19,215 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:15:19,216 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:15:19,216 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-12-22 10:15:19,216 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:15:19,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:15:19,217 INFO L82 PathProgramCache]: Analyzing trace with hash 1583354627, now seen corresponding path program 1 times [2020-12-22 10:15:19,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:15:19,217 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94904970] [2020-12-22 10:15:19,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:15:19,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:15:19,616 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-12-22 10:15:19,616 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94904970] [2020-12-22 10:15:19,616 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:15:19,617 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 10:15:19,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277181252] [2020-12-22 10:15:19,618 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 10:15:19,618 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:15:19,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 10:15:19,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:15:19,619 INFO L87 Difference]: Start difference. First operand 85879 states and 120974 transitions. Second operand 9 states. [2020-12-22 10:15:32,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:15:32,801 INFO L93 Difference]: Finished difference Result 204551 states and 290326 transitions. [2020-12-22 10:15:32,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 10:15:32,801 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 130 [2020-12-22 10:15:32,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:15:33,029 INFO L225 Difference]: With dead ends: 204551 [2020-12-22 10:15:33,029 INFO L226 Difference]: Without dead ends: 186821 [2020-12-22 10:15:33,079 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-12-22 10:15:33,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186821 states. [2020-12-22 10:15:41,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186821 to 103607. [2020-12-22 10:15:41,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103607 states. [2020-12-22 10:15:41,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103607 states to 103607 states and 146062 transitions. [2020-12-22 10:15:41,760 INFO L78 Accepts]: Start accepts. Automaton has 103607 states and 146062 transitions. Word has length 130 [2020-12-22 10:15:41,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:15:41,761 INFO L481 AbstractCegarLoop]: Abstraction has 103607 states and 146062 transitions. [2020-12-22 10:15:41,761 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 10:15:41,761 INFO L276 IsEmpty]: Start isEmpty. Operand 103607 states and 146062 transitions. [2020-12-22 10:15:41,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-12-22 10:15:41,774 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:15:41,774 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:15:41,774 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-12-22 10:15:41,774 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:15:41,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:15:41,775 INFO L82 PathProgramCache]: Analyzing trace with hash 162359075, now seen corresponding path program 1 times [2020-12-22 10:15:41,775 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:15:41,775 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112669471] [2020-12-22 10:15:41,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:15:41,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:15:41,957 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 10:15:41,957 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112669471] [2020-12-22 10:15:41,958 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:15:41,958 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 10:15:41,958 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548199567] [2020-12-22 10:15:41,958 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 10:15:41,958 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:15:41,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 10:15:41,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:15:41,959 INFO L87 Difference]: Start difference. First operand 103607 states and 146062 transitions. Second operand 9 states. [2020-12-22 10:15:42,247 WARN L197 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2020-12-22 10:15:57,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:15:57,907 INFO L93 Difference]: Finished difference Result 222279 states and 315414 transitions. [2020-12-22 10:15:57,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 10:15:57,910 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 130 [2020-12-22 10:15:57,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:15:58,351 INFO L225 Difference]: With dead ends: 222279 [2020-12-22 10:15:58,351 INFO L226 Difference]: Without dead ends: 204549 [2020-12-22 10:15:58,401 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-12-22 10:15:58,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204549 states. [2020-12-22 10:16:08,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204549 to 121335. [2020-12-22 10:16:08,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121335 states. [2020-12-22 10:16:08,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121335 states to 121335 states and 171150 transitions. [2020-12-22 10:16:09,000 INFO L78 Accepts]: Start accepts. Automaton has 121335 states and 171150 transitions. Word has length 130 [2020-12-22 10:16:09,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:16:09,000 INFO L481 AbstractCegarLoop]: Abstraction has 121335 states and 171150 transitions. [2020-12-22 10:16:09,000 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 10:16:09,000 INFO L276 IsEmpty]: Start isEmpty. Operand 121335 states and 171150 transitions. [2020-12-22 10:16:09,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-12-22 10:16:09,230 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:16:09,230 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:16:09,231 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-12-22 10:16:09,231 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:16:09,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:16:09,232 INFO L82 PathProgramCache]: Analyzing trace with hash -403461309, now seen corresponding path program 1 times [2020-12-22 10:16:09,239 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:16:09,246 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473243911] [2020-12-22 10:16:09,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:16:09,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:16:09,460 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 10:16:09,460 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473243911] [2020-12-22 10:16:09,460 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:16:09,460 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 10:16:09,461 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197742611] [2020-12-22 10:16:09,461 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 10:16:09,461 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:16:09,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 10:16:09,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:16:09,462 INFO L87 Difference]: Start difference. First operand 121335 states and 171150 transitions. Second operand 9 states. [2020-12-22 10:16:28,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:16:28,455 INFO L93 Difference]: Finished difference Result 240007 states and 340502 transitions. [2020-12-22 10:16:28,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 10:16:28,456 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 130 [2020-12-22 10:16:28,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:16:28,745 INFO L225 Difference]: With dead ends: 240007 [2020-12-22 10:16:28,745 INFO L226 Difference]: Without dead ends: 222277 [2020-12-22 10:16:28,798 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-12-22 10:16:29,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222277 states. [2020-12-22 10:16:41,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222277 to 139063. [2020-12-22 10:16:41,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139063 states. [2020-12-22 10:16:42,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139063 states to 139063 states and 196238 transitions. [2020-12-22 10:16:42,099 INFO L78 Accepts]: Start accepts. Automaton has 139063 states and 196238 transitions. Word has length 130 [2020-12-22 10:16:42,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:16:42,099 INFO L481 AbstractCegarLoop]: Abstraction has 139063 states and 196238 transitions. [2020-12-22 10:16:42,099 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 10:16:42,099 INFO L276 IsEmpty]: Start isEmpty. Operand 139063 states and 196238 transitions. [2020-12-22 10:16:42,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-12-22 10:16:42,119 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:16:42,119 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:16:42,120 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-12-22 10:16:42,120 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:16:42,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:16:42,120 INFO L82 PathProgramCache]: Analyzing trace with hash -214245533, now seen corresponding path program 1 times [2020-12-22 10:16:42,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:16:42,121 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255786146] [2020-12-22 10:16:42,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:16:42,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:16:42,313 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 10:16:42,314 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255786146] [2020-12-22 10:16:42,314 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:16:42,314 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 10:16:42,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448052207] [2020-12-22 10:16:42,315 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 10:16:42,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:16:42,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 10:16:42,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:16:42,316 INFO L87 Difference]: Start difference. First operand 139063 states and 196238 transitions. Second operand 9 states. [2020-12-22 10:17:04,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:17:04,843 INFO L93 Difference]: Finished difference Result 246855 states and 350358 transitions. [2020-12-22 10:17:04,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 10:17:04,844 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 130 [2020-12-22 10:17:04,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:17:05,355 INFO L225 Difference]: With dead ends: 246855 [2020-12-22 10:17:05,355 INFO L226 Difference]: Without dead ends: 234565 [2020-12-22 10:17:05,403 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-12-22 10:17:05,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234565 states. [2020-12-22 10:17:20,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234565 to 151351. [2020-12-22 10:17:20,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151351 states. [2020-12-22 10:17:21,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151351 states to 151351 states and 213774 transitions. [2020-12-22 10:17:21,203 INFO L78 Accepts]: Start accepts. Automaton has 151351 states and 213774 transitions. Word has length 130 [2020-12-22 10:17:21,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:17:21,204 INFO L481 AbstractCegarLoop]: Abstraction has 151351 states and 213774 transitions. [2020-12-22 10:17:21,204 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 10:17:21,204 INFO L276 IsEmpty]: Start isEmpty. Operand 151351 states and 213774 transitions. [2020-12-22 10:17:21,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-12-22 10:17:21,223 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:17:21,223 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:17:21,223 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-12-22 10:17:21,223 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:17:21,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:17:21,224 INFO L82 PathProgramCache]: Analyzing trace with hash 1524812958, now seen corresponding path program 1 times [2020-12-22 10:17:21,224 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:17:21,224 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077761908] [2020-12-22 10:17:21,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:17:21,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:17:21,308 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:17:21,308 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077761908] [2020-12-22 10:17:21,309 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:17:21,309 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:17:21,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986208165] [2020-12-22 10:17:21,309 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:17:21,309 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:17:21,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:17:21,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:17:21,310 INFO L87 Difference]: Start difference. First operand 151351 states and 213774 transitions. Second operand 3 states.