/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.6.ufo.BOUNDED-12.pals+Problem12_label00.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 10:03:07,127 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 10:03:07,131 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 10:03:07,178 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 10:03:07,179 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 10:03:07,180 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 10:03:07,182 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 10:03:07,184 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 10:03:07,186 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 10:03:07,187 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 10:03:07,189 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 10:03:07,190 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 10:03:07,191 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 10:03:07,192 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 10:03:07,193 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 10:03:07,194 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 10:03:07,195 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 10:03:07,196 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 10:03:07,198 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 10:03:07,201 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 10:03:07,202 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 10:03:07,206 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 10:03:07,207 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 10:03:07,208 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 10:03:07,211 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 10:03:07,222 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 10:03:07,223 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 10:03:07,224 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 10:03:07,225 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 10:03:07,226 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 10:03:07,226 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 10:03:07,227 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 10:03:07,227 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 10:03:07,228 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 10:03:07,229 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 10:03:07,230 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 10:03:07,231 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 10:03:07,260 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 10:03:07,261 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 10:03:07,265 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 10:03:07,265 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 10:03:07,265 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 10:03:07,266 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 10:03:07,266 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 10:03:07,266 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 10:03:07,266 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 10:03:07,267 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 10:03:07,267 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 10:03:07,269 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 10:03:07,269 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 10:03:07,269 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 10:03:07,270 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 10:03:07,270 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 10:03:07,270 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 10:03:07,270 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 10:03:07,271 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 10:03:07,271 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 10:03:07,271 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 10:03:07,271 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 10:03:07,271 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 10:03:07,272 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 10:03:07,272 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 10:03:07,272 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 10:03:07,655 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 10:03:07,686 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 10:03:07,690 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 10:03:07,691 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 10:03:07,692 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 10:03:07,693 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pals_lcr.6.ufo.BOUNDED-12.pals+Problem12_label00.c [2020-12-22 10:03:07,770 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cb782be8b/27414bb8df6e448eb37414fcf5524bf0/FLAG42f803646 [2020-12-22 10:03:08,797 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 10:03:08,799 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.6.ufo.BOUNDED-12.pals+Problem12_label00.c [2020-12-22 10:03:08,840 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cb782be8b/27414bb8df6e448eb37414fcf5524bf0/FLAG42f803646 [2020-12-22 10:03:09,245 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cb782be8b/27414bb8df6e448eb37414fcf5524bf0 [2020-12-22 10:03:09,249 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 10:03:09,252 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 10:03:09,256 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 10:03:09,256 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 10:03:09,260 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 10:03:09,260 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 10:03:09" (1/1) ... [2020-12-22 10:03:09,262 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3fdf948c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:03:09, skipping insertion in model container [2020-12-22 10:03:09,263 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 10:03:09" (1/1) ... [2020-12-22 10:03:09,271 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 10:03:09,415 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 10:03:09,893 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.6.ufo.BOUNDED-12.pals+Problem12_label00.c[15586,15599] [2020-12-22 10:03:09,949 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.6.ufo.BOUNDED-12.pals+Problem12_label00.c[17218,17231] [2020-12-22 10:03:10,857 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 10:03:10,869 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 10:03:10,969 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.6.ufo.BOUNDED-12.pals+Problem12_label00.c[15586,15599] [2020-12-22 10:03:10,975 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.6.ufo.BOUNDED-12.pals+Problem12_label00.c[17218,17231] [2020-12-22 10:03:11,568 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 10:03:11,609 INFO L208 MainTranslator]: Completed translation [2020-12-22 10:03:11,610 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:03:11 WrapperNode [2020-12-22 10:03:11,610 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 10:03:11,611 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 10:03:11,611 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 10:03:11,611 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 10:03:11,620 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:03:11" (1/1) ... [2020-12-22 10:03:11,704 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:03:11" (1/1) ... [2020-12-22 10:03:12,119 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 10:03:12,122 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 10:03:12,122 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 10:03:12,122 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 10:03:12,133 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:03:11" (1/1) ... [2020-12-22 10:03:12,133 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:03:11" (1/1) ... [2020-12-22 10:03:12,177 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:03:11" (1/1) ... [2020-12-22 10:03:12,178 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:03:11" (1/1) ... [2020-12-22 10:03:12,462 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:03:11" (1/1) ... [2020-12-22 10:03:12,610 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:03:11" (1/1) ... [2020-12-22 10:03:12,655 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:03:11" (1/1) ... [2020-12-22 10:03:12,708 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 10:03:12,710 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 10:03:12,711 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 10:03:12,711 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 10:03:12,712 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:03:11" (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 10:03:12,820 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 10:03:12,820 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 10:03:12,820 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 10:03:12,821 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 10:03:18,112 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 10:03:18,113 INFO L299 CfgBuilder]: Removed 38 assume(true) statements. [2020-12-22 10:03:18,117 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 10:03:18 BoogieIcfgContainer [2020-12-22 10:03:18,117 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 10:03:18,121 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 10:03:18,122 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 10:03:18,125 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 10:03:18,126 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 10:03:09" (1/3) ... [2020-12-22 10:03:18,126 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f011938 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 10:03:18, skipping insertion in model container [2020-12-22 10:03:18,127 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:03:11" (2/3) ... [2020-12-22 10:03:18,127 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f011938 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 10:03:18, skipping insertion in model container [2020-12-22 10:03:18,127 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 10:03:18" (3/3) ... [2020-12-22 10:03:18,129 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.6.ufo.BOUNDED-12.pals+Problem12_label00.c [2020-12-22 10:03:18,135 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 10:03:18,141 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-22 10:03:18,161 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-22 10:03:18,195 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 10:03:18,195 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 10:03:18,195 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 10:03:18,196 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 10:03:18,196 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 10:03:18,196 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 10:03:18,196 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 10:03:18,196 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 10:03:18,231 INFO L276 IsEmpty]: Start isEmpty. Operand 926 states. [2020-12-22 10:03:18,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-22 10:03:18,238 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:03:18,239 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:03:18,239 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:03:18,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:03:18,246 INFO L82 PathProgramCache]: Analyzing trace with hash -442194987, now seen corresponding path program 1 times [2020-12-22 10:03:18,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:03:18,257 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943367953] [2020-12-22 10:03:18,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:03:18,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:03:18,516 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 10:03:18,517 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943367953] [2020-12-22 10:03:18,517 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:03:18,518 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 10:03:18,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374944018] [2020-12-22 10:03:18,523 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:03:18,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:03:18,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:03:18,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:03:18,541 INFO L87 Difference]: Start difference. First operand 926 states. Second operand 3 states. [2020-12-22 10:03:24,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:03:24,521 INFO L93 Difference]: Finished difference Result 2561 states and 4920 transitions. [2020-12-22 10:03:24,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:03:24,523 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2020-12-22 10:03:24,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:03:24,562 INFO L225 Difference]: With dead ends: 2561 [2020-12-22 10:03:24,562 INFO L226 Difference]: Without dead ends: 1611 [2020-12-22 10:03:24,571 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 10:03:24,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1611 states. [2020-12-22 10:03:24,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1611 to 1611. [2020-12-22 10:03:24,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1611 states. [2020-12-22 10:03:24,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1611 states to 1611 states and 2959 transitions. [2020-12-22 10:03:24,751 INFO L78 Accepts]: Start accepts. Automaton has 1611 states and 2959 transitions. Word has length 16 [2020-12-22 10:03:24,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:03:24,751 INFO L481 AbstractCegarLoop]: Abstraction has 1611 states and 2959 transitions. [2020-12-22 10:03:24,752 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:03:24,752 INFO L276 IsEmpty]: Start isEmpty. Operand 1611 states and 2959 transitions. [2020-12-22 10:03:24,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-12-22 10:03:24,756 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:03:24,756 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] [2020-12-22 10:03:24,756 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 10:03:24,757 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:03:24,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:03:24,759 INFO L82 PathProgramCache]: Analyzing trace with hash 615382892, now seen corresponding path program 1 times [2020-12-22 10:03:24,759 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:03:24,760 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957168042] [2020-12-22 10:03:24,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:03:24,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:03:24,984 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 10:03:24,985 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957168042] [2020-12-22 10:03:24,985 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:03:24,985 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 10:03:24,985 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188703128] [2020-12-22 10:03:24,988 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 10:03:24,988 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:03:24,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 10:03:24,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 10:03:24,989 INFO L87 Difference]: Start difference. First operand 1611 states and 2959 transitions. Second operand 5 states. [2020-12-22 10:03:25,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:03:25,105 INFO L93 Difference]: Finished difference Result 1675 states and 3058 transitions. [2020-12-22 10:03:25,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 10:03:25,106 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 38 [2020-12-22 10:03:25,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:03:25,116 INFO L225 Difference]: With dead ends: 1675 [2020-12-22 10:03:25,116 INFO L226 Difference]: Without dead ends: 1611 [2020-12-22 10:03:25,117 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 10:03:25,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1611 states. [2020-12-22 10:03:25,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1611 to 1611. [2020-12-22 10:03:25,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1611 states. [2020-12-22 10:03:25,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1611 states to 1611 states and 2919 transitions. [2020-12-22 10:03:25,159 INFO L78 Accepts]: Start accepts. Automaton has 1611 states and 2919 transitions. Word has length 38 [2020-12-22 10:03:25,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:03:25,160 INFO L481 AbstractCegarLoop]: Abstraction has 1611 states and 2919 transitions. [2020-12-22 10:03:25,160 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 10:03:25,160 INFO L276 IsEmpty]: Start isEmpty. Operand 1611 states and 2919 transitions. [2020-12-22 10:03:25,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-12-22 10:03:25,163 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:03:25,163 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:03:25,164 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 10:03:25,164 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:03:25,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:03:25,165 INFO L82 PathProgramCache]: Analyzing trace with hash -2101054792, now seen corresponding path program 1 times [2020-12-22 10:03:25,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:03:25,165 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793266104] [2020-12-22 10:03:25,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:03:25,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:03:25,297 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 10:03:25,299 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793266104] [2020-12-22 10:03:25,299 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:03:25,299 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:03:25,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281497934] [2020-12-22 10:03:25,301 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:03:25,301 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:03:25,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:03:25,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:03:25,304 INFO L87 Difference]: Start difference. First operand 1611 states and 2919 transitions. Second operand 3 states. [2020-12-22 10:03:25,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:03:25,351 INFO L93 Difference]: Finished difference Result 1725 states and 3099 transitions. [2020-12-22 10:03:25,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:03:25,352 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 77 [2020-12-22 10:03:25,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:03:25,362 INFO L225 Difference]: With dead ends: 1725 [2020-12-22 10:03:25,363 INFO L226 Difference]: Without dead ends: 1665 [2020-12-22 10:03:25,366 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 10:03:25,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1665 states. [2020-12-22 10:03:25,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1665 to 1663. [2020-12-22 10:03:25,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1663 states. [2020-12-22 10:03:25,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1663 states to 1663 states and 3002 transitions. [2020-12-22 10:03:25,422 INFO L78 Accepts]: Start accepts. Automaton has 1663 states and 3002 transitions. Word has length 77 [2020-12-22 10:03:25,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:03:25,424 INFO L481 AbstractCegarLoop]: Abstraction has 1663 states and 3002 transitions. [2020-12-22 10:03:25,424 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:03:25,424 INFO L276 IsEmpty]: Start isEmpty. Operand 1663 states and 3002 transitions. [2020-12-22 10:03:25,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-12-22 10:03:25,431 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:03:25,431 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:03:25,435 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 10:03:25,435 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:03:25,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:03:25,436 INFO L82 PathProgramCache]: Analyzing trace with hash 1452480302, now seen corresponding path program 1 times [2020-12-22 10:03:25,436 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:03:25,436 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250627470] [2020-12-22 10:03:25,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:03:25,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:03:25,592 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 10:03:25,593 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250627470] [2020-12-22 10:03:25,593 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:03:25,593 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:03:25,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728336886] [2020-12-22 10:03:25,595 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:03:25,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:03:25,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:03:25,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:03:25,596 INFO L87 Difference]: Start difference. First operand 1663 states and 3002 transitions. Second operand 3 states. [2020-12-22 10:03:25,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:03:25,642 INFO L93 Difference]: Finished difference Result 1875 states and 3338 transitions. [2020-12-22 10:03:25,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:03:25,642 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 77 [2020-12-22 10:03:25,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:03:25,654 INFO L225 Difference]: With dead ends: 1875 [2020-12-22 10:03:25,654 INFO L226 Difference]: Without dead ends: 1763 [2020-12-22 10:03:25,655 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:03:25,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1763 states. [2020-12-22 10:03:25,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1763 to 1761. [2020-12-22 10:03:25,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1761 states. [2020-12-22 10:03:25,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1761 states to 1761 states and 3157 transitions. [2020-12-22 10:03:25,710 INFO L78 Accepts]: Start accepts. Automaton has 1761 states and 3157 transitions. Word has length 77 [2020-12-22 10:03:25,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:03:25,712 INFO L481 AbstractCegarLoop]: Abstraction has 1761 states and 3157 transitions. [2020-12-22 10:03:25,712 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:03:25,712 INFO L276 IsEmpty]: Start isEmpty. Operand 1761 states and 3157 transitions. [2020-12-22 10:03:25,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-12-22 10:03:25,714 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:03:25,715 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:03:25,715 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 10:03:25,715 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:03:25,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:03:25,716 INFO L82 PathProgramCache]: Analyzing trace with hash -1624501596, now seen corresponding path program 1 times [2020-12-22 10:03:25,716 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:03:25,716 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872065048] [2020-12-22 10:03:25,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:03:25,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:03:25,974 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 10:03:25,975 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872065048] [2020-12-22 10:03:25,975 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:03:25,975 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 10:03:25,975 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136318156] [2020-12-22 10:03:25,976 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 10:03:25,976 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:03:25,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 10:03:25,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-12-22 10:03:25,977 INFO L87 Difference]: Start difference. First operand 1761 states and 3157 transitions. Second operand 8 states. [2020-12-22 10:03:26,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:03:26,454 INFO L93 Difference]: Finished difference Result 4281 states and 7153 transitions. [2020-12-22 10:03:26,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-22 10:03:26,455 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 77 [2020-12-22 10:03:26,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:03:26,481 INFO L225 Difference]: With dead ends: 4281 [2020-12-22 10:03:26,482 INFO L226 Difference]: Without dead ends: 4071 [2020-12-22 10:03:26,485 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:03:26,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4071 states. [2020-12-22 10:03:26,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4071 to 1969. [2020-12-22 10:03:26,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1969 states. [2020-12-22 10:03:26,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1969 states to 1969 states and 3481 transitions. [2020-12-22 10:03:26,577 INFO L78 Accepts]: Start accepts. Automaton has 1969 states and 3481 transitions. Word has length 77 [2020-12-22 10:03:26,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:03:26,578 INFO L481 AbstractCegarLoop]: Abstraction has 1969 states and 3481 transitions. [2020-12-22 10:03:26,578 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 10:03:26,578 INFO L276 IsEmpty]: Start isEmpty. Operand 1969 states and 3481 transitions. [2020-12-22 10:03:26,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-22 10:03:26,580 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:03:26,580 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] [2020-12-22 10:03:26,580 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 10:03:26,580 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:03:26,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:03:26,581 INFO L82 PathProgramCache]: Analyzing trace with hash 806369108, now seen corresponding path program 1 times [2020-12-22 10:03:26,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:03:26,581 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585402147] [2020-12-22 10:03:26,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:03:26,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:03:26,696 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 10:03:26,697 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585402147] [2020-12-22 10:03:26,697 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:03:26,697 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:03:26,697 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065551967] [2020-12-22 10:03:26,698 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:03:26,698 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:03:26,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:03:26,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:03:26,699 INFO L87 Difference]: Start difference. First operand 1969 states and 3481 transitions. Second operand 3 states. [2020-12-22 10:03:26,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:03:26,766 INFO L93 Difference]: Finished difference Result 2589 states and 4453 transitions. [2020-12-22 10:03:26,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:03:26,766 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 79 [2020-12-22 10:03:26,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:03:26,779 INFO L225 Difference]: With dead ends: 2589 [2020-12-22 10:03:26,780 INFO L226 Difference]: Without dead ends: 2171 [2020-12-22 10:03:26,781 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 10:03:26,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2171 states. [2020-12-22 10:03:26,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2171 to 2169. [2020-12-22 10:03:26,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2169 states. [2020-12-22 10:03:26,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2169 states to 2169 states and 3789 transitions. [2020-12-22 10:03:26,859 INFO L78 Accepts]: Start accepts. Automaton has 2169 states and 3789 transitions. Word has length 79 [2020-12-22 10:03:26,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:03:26,860 INFO L481 AbstractCegarLoop]: Abstraction has 2169 states and 3789 transitions. [2020-12-22 10:03:26,860 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:03:26,860 INFO L276 IsEmpty]: Start isEmpty. Operand 2169 states and 3789 transitions. [2020-12-22 10:03:26,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-22 10:03:26,862 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:03:26,862 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] [2020-12-22 10:03:26,863 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 10:03:26,867 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:03:26,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:03:26,867 INFO L82 PathProgramCache]: Analyzing trace with hash 872862620, now seen corresponding path program 1 times [2020-12-22 10:03:26,868 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:03:26,869 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645736011] [2020-12-22 10:03:26,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:03:26,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:03:27,192 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 10:03:27,193 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645736011] [2020-12-22 10:03:27,194 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:03:27,194 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 10:03:27,194 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856903918] [2020-12-22 10:03:27,195 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 10:03:27,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:03:27,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 10:03:27,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-12-22 10:03:27,196 INFO L87 Difference]: Start difference. First operand 2169 states and 3789 transitions. Second operand 8 states. [2020-12-22 10:03:27,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:03:27,567 INFO L93 Difference]: Finished difference Result 2787 states and 4753 transitions. [2020-12-22 10:03:27,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 10:03:27,567 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 79 [2020-12-22 10:03:27,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:03:27,579 INFO L225 Difference]: With dead ends: 2787 [2020-12-22 10:03:27,580 INFO L226 Difference]: Without dead ends: 2171 [2020-12-22 10:03:27,582 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2020-12-22 10:03:27,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2171 states. [2020-12-22 10:03:27,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2171 to 2169. [2020-12-22 10:03:27,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2169 states. [2020-12-22 10:03:27,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2169 states to 2169 states and 3783 transitions. [2020-12-22 10:03:27,664 INFO L78 Accepts]: Start accepts. Automaton has 2169 states and 3783 transitions. Word has length 79 [2020-12-22 10:03:27,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:03:27,664 INFO L481 AbstractCegarLoop]: Abstraction has 2169 states and 3783 transitions. [2020-12-22 10:03:27,664 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 10:03:27,664 INFO L276 IsEmpty]: Start isEmpty. Operand 2169 states and 3783 transitions. [2020-12-22 10:03:27,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-22 10:03:27,666 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:03:27,666 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] [2020-12-22 10:03:27,666 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 10:03:27,666 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:03:27,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:03:27,667 INFO L82 PathProgramCache]: Analyzing trace with hash -385682984, now seen corresponding path program 1 times [2020-12-22 10:03:27,667 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:03:27,667 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915590449] [2020-12-22 10:03:27,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:03:27,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:03:27,763 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 10:03:27,764 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915590449] [2020-12-22 10:03:27,764 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:03:27,764 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:03:27,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034514718] [2020-12-22 10:03:27,765 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:03:27,765 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:03:27,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:03:27,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:03:27,766 INFO L87 Difference]: Start difference. First operand 2169 states and 3783 transitions. Second operand 3 states. [2020-12-22 10:03:27,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:03:27,869 INFO L93 Difference]: Finished difference Result 3329 states and 5577 transitions. [2020-12-22 10:03:27,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:03:27,869 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 79 [2020-12-22 10:03:27,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:03:27,884 INFO L225 Difference]: With dead ends: 3329 [2020-12-22 10:03:27,884 INFO L226 Difference]: Without dead ends: 2713 [2020-12-22 10:03:27,887 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 10:03:27,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2713 states. [2020-12-22 10:03:27,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2713 to 2711. [2020-12-22 10:03:27,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2711 states. [2020-12-22 10:03:27,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2711 states to 2711 states and 4607 transitions. [2020-12-22 10:03:27,997 INFO L78 Accepts]: Start accepts. Automaton has 2711 states and 4607 transitions. Word has length 79 [2020-12-22 10:03:27,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:03:27,999 INFO L481 AbstractCegarLoop]: Abstraction has 2711 states and 4607 transitions. [2020-12-22 10:03:27,999 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:03:28,000 INFO L276 IsEmpty]: Start isEmpty. Operand 2711 states and 4607 transitions. [2020-12-22 10:03:28,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-22 10:03:28,001 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:03:28,001 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] [2020-12-22 10:03:28,003 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 10:03:28,003 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:03:28,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:03:28,004 INFO L82 PathProgramCache]: Analyzing trace with hash -111995272, now seen corresponding path program 1 times [2020-12-22 10:03:28,004 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:03:28,008 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865502506] [2020-12-22 10:03:28,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:03:28,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:03:28,083 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 10:03:28,084 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865502506] [2020-12-22 10:03:28,086 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:03:28,086 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:03:28,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650540181] [2020-12-22 10:03:28,087 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:03:28,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:03:28,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:03:28,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:03:28,087 INFO L87 Difference]: Start difference. First operand 2711 states and 4607 transitions. Second operand 3 states. [2020-12-22 10:03:28,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:03:28,246 INFO L93 Difference]: Finished difference Result 4883 states and 7929 transitions. [2020-12-22 10:03:28,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:03:28,247 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 79 [2020-12-22 10:03:28,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:03:28,268 INFO L225 Difference]: With dead ends: 4883 [2020-12-22 10:03:28,268 INFO L226 Difference]: Without dead ends: 3725 [2020-12-22 10:03:28,271 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 10:03:28,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3725 states. [2020-12-22 10:03:28,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3725 to 3723. [2020-12-22 10:03:28,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3723 states. [2020-12-22 10:03:28,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3723 states to 3723 states and 6123 transitions. [2020-12-22 10:03:28,457 INFO L78 Accepts]: Start accepts. Automaton has 3723 states and 6123 transitions. Word has length 79 [2020-12-22 10:03:28,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:03:28,457 INFO L481 AbstractCegarLoop]: Abstraction has 3723 states and 6123 transitions. [2020-12-22 10:03:28,458 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:03:28,458 INFO L276 IsEmpty]: Start isEmpty. Operand 3723 states and 6123 transitions. [2020-12-22 10:03:28,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-22 10:03:28,459 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:03:28,459 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] [2020-12-22 10:03:28,459 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 10:03:28,459 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:03:28,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:03:28,460 INFO L82 PathProgramCache]: Analyzing trace with hash 1707076376, now seen corresponding path program 1 times [2020-12-22 10:03:28,460 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:03:28,461 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734954655] [2020-12-22 10:03:28,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:03:28,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:03:28,540 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 10:03:28,540 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734954655] [2020-12-22 10:03:28,541 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:03:28,541 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:03:28,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086969247] [2020-12-22 10:03:28,541 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:03:28,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:03:28,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:03:28,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:03:28,543 INFO L87 Difference]: Start difference. First operand 3723 states and 6123 transitions. Second operand 3 states. [2020-12-22 10:03:28,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:03:28,904 INFO L93 Difference]: Finished difference Result 7775 states and 12237 transitions. [2020-12-22 10:03:28,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:03:28,904 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 79 [2020-12-22 10:03:28,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:03:28,945 INFO L225 Difference]: With dead ends: 7775 [2020-12-22 10:03:28,945 INFO L226 Difference]: Without dead ends: 5605 [2020-12-22 10:03:28,951 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 10:03:28,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5605 states. [2020-12-22 10:03:29,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5605 to 5603. [2020-12-22 10:03:29,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5603 states. [2020-12-22 10:03:29,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5603 states to 5603 states and 8891 transitions. [2020-12-22 10:03:29,342 INFO L78 Accepts]: Start accepts. Automaton has 5603 states and 8891 transitions. Word has length 79 [2020-12-22 10:03:29,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:03:29,342 INFO L481 AbstractCegarLoop]: Abstraction has 5603 states and 8891 transitions. [2020-12-22 10:03:29,342 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:03:29,342 INFO L276 IsEmpty]: Start isEmpty. Operand 5603 states and 8891 transitions. [2020-12-22 10:03:29,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-22 10:03:29,344 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:03:29,344 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] [2020-12-22 10:03:29,344 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 10:03:29,344 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:03:29,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:03:29,345 INFO L82 PathProgramCache]: Analyzing trace with hash 1886482360, now seen corresponding path program 1 times [2020-12-22 10:03:29,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:03:29,346 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057209040] [2020-12-22 10:03:29,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:03:29,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:03:29,427 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 10:03:29,427 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057209040] [2020-12-22 10:03:29,427 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:03:29,428 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:03:29,428 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670398498] [2020-12-22 10:03:29,428 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:03:29,428 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:03:29,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:03:29,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:03:29,431 INFO L87 Difference]: Start difference. First operand 5603 states and 8891 transitions. Second operand 3 states. [2020-12-22 10:03:29,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:03:29,985 INFO L93 Difference]: Finished difference Result 13127 states and 20061 transitions. [2020-12-22 10:03:29,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:03:29,986 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 79 [2020-12-22 10:03:29,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:03:30,010 INFO L225 Difference]: With dead ends: 13127 [2020-12-22 10:03:30,010 INFO L226 Difference]: Without dead ends: 9077 [2020-12-22 10:03:30,019 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 10:03:30,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9077 states. [2020-12-22 10:03:30,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9077 to 9075. [2020-12-22 10:03:30,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9075 states. [2020-12-22 10:03:30,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9075 states to 9075 states and 13899 transitions. [2020-12-22 10:03:30,682 INFO L78 Accepts]: Start accepts. Automaton has 9075 states and 13899 transitions. Word has length 79 [2020-12-22 10:03:30,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:03:30,682 INFO L481 AbstractCegarLoop]: Abstraction has 9075 states and 13899 transitions. [2020-12-22 10:03:30,683 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:03:30,683 INFO L276 IsEmpty]: Start isEmpty. Operand 9075 states and 13899 transitions. [2020-12-22 10:03:30,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-12-22 10:03:30,684 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:03:30,684 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] [2020-12-22 10:03:30,684 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 10:03:30,684 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:03:30,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:03:30,685 INFO L82 PathProgramCache]: Analyzing trace with hash 874214487, now seen corresponding path program 1 times [2020-12-22 10:03:30,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:03:30,686 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245887229] [2020-12-22 10:03:30,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:03:30,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:03:30,827 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 10:03:30,827 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245887229] [2020-12-22 10:03:30,827 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:03:30,828 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 10:03:30,828 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071022964] [2020-12-22 10:03:30,828 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 10:03:30,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:03:30,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 10:03:30,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-12-22 10:03:30,829 INFO L87 Difference]: Start difference. First operand 9075 states and 13899 transitions. Second operand 8 states. [2020-12-22 10:03:32,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:03:32,019 INFO L93 Difference]: Finished difference Result 15538 states and 23170 transitions. [2020-12-22 10:03:32,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 10:03:32,020 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 80 [2020-12-22 10:03:32,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:03:32,060 INFO L225 Difference]: With dead ends: 15538 [2020-12-22 10:03:32,060 INFO L226 Difference]: Without dead ends: 15536 [2020-12-22 10:03:32,067 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 10:03:32,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15536 states. [2020-12-22 10:03:32,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15536 to 9459. [2020-12-22 10:03:32,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9459 states. [2020-12-22 10:03:32,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9459 states to 9459 states and 14251 transitions. [2020-12-22 10:03:32,805 INFO L78 Accepts]: Start accepts. Automaton has 9459 states and 14251 transitions. Word has length 80 [2020-12-22 10:03:32,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:03:32,806 INFO L481 AbstractCegarLoop]: Abstraction has 9459 states and 14251 transitions. [2020-12-22 10:03:32,806 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 10:03:32,806 INFO L276 IsEmpty]: Start isEmpty. Operand 9459 states and 14251 transitions. [2020-12-22 10:03:32,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-12-22 10:03:32,807 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:03:32,807 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 10:03:32,808 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 10:03:32,808 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:03:32,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:03:32,808 INFO L82 PathProgramCache]: Analyzing trace with hash 721169400, now seen corresponding path program 1 times [2020-12-22 10:03:32,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:03:32,809 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633855000] [2020-12-22 10:03:32,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:03:32,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:03:33,014 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:03:33,015 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633855000] [2020-12-22 10:03:33,015 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:03:33,015 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:03:33,015 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814484513] [2020-12-22 10:03:33,016 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 10:03:33,016 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:03:33,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 10:03:33,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 10:03:33,022 INFO L87 Difference]: Start difference. First operand 9459 states and 14251 transitions. Second operand 4 states. [2020-12-22 10:03:43,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:03:43,664 INFO L93 Difference]: Finished difference Result 13216 states and 21141 transitions. [2020-12-22 10:03:43,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 10:03:43,665 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 85 [2020-12-22 10:03:43,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:03:43,689 INFO L225 Difference]: With dead ends: 13216 [2020-12-22 10:03:43,689 INFO L226 Difference]: Without dead ends: 11712 [2020-12-22 10:03:43,694 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 10:03:43,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11712 states. [2020-12-22 10:03:44,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11712 to 11712. [2020-12-22 10:03:44,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11712 states. [2020-12-22 10:03:44,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11712 states to 11712 states and 17380 transitions. [2020-12-22 10:03:44,556 INFO L78 Accepts]: Start accepts. Automaton has 11712 states and 17380 transitions. Word has length 85 [2020-12-22 10:03:44,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:03:44,556 INFO L481 AbstractCegarLoop]: Abstraction has 11712 states and 17380 transitions. [2020-12-22 10:03:44,556 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 10:03:44,557 INFO L276 IsEmpty]: Start isEmpty. Operand 11712 states and 17380 transitions. [2020-12-22 10:03:44,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-12-22 10:03:44,558 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:03:44,558 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 10:03:44,558 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 10:03:44,559 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:03:44,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:03:44,559 INFO L82 PathProgramCache]: Analyzing trace with hash 1872923933, now seen corresponding path program 1 times [2020-12-22 10:03:44,559 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:03:44,560 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216854437] [2020-12-22 10:03:44,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:03:44,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:03:44,631 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:03:44,632 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216854437] [2020-12-22 10:03:44,632 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:03:44,632 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:03:44,632 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847122086] [2020-12-22 10:03:44,633 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:03:44,633 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:03:44,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:03:44,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:03:44,634 INFO L87 Difference]: Start difference. First operand 11712 states and 17380 transitions. Second operand 3 states. [2020-12-22 10:03:50,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:03:50,868 INFO L93 Difference]: Finished difference Result 18473 states and 28432 transitions. [2020-12-22 10:03:50,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:03:50,869 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 87 [2020-12-22 10:03:50,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:03:50,903 INFO L225 Difference]: With dead ends: 18473 [2020-12-22 10:03:50,903 INFO L226 Difference]: Without dead ends: 14716 [2020-12-22 10:03:50,915 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 10:03:50,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14716 states. [2020-12-22 10:03:51,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14716 to 14716. [2020-12-22 10:03:51,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14716 states. [2020-12-22 10:03:51,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14716 states to 14716 states and 21860 transitions. [2020-12-22 10:03:51,677 INFO L78 Accepts]: Start accepts. Automaton has 14716 states and 21860 transitions. Word has length 87 [2020-12-22 10:03:51,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:03:51,677 INFO L481 AbstractCegarLoop]: Abstraction has 14716 states and 21860 transitions. [2020-12-22 10:03:51,677 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:03:51,677 INFO L276 IsEmpty]: Start isEmpty. Operand 14716 states and 21860 transitions. [2020-12-22 10:03:51,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-12-22 10:03:51,683 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:03:51,684 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:03:51,684 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 10:03:51,684 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:03:51,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:03:51,685 INFO L82 PathProgramCache]: Analyzing trace with hash -1411161737, now seen corresponding path program 1 times [2020-12-22 10:03:51,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:03:51,685 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554901574] [2020-12-22 10:03:51,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:03:51,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:03:51,836 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-12-22 10:03:51,836 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554901574] [2020-12-22 10:03:51,837 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:03:51,837 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 10:03:51,837 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285847053] [2020-12-22 10:03:51,837 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 10:03:51,838 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:03:51,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 10:03:51,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-12-22 10:03:51,838 INFO L87 Difference]: Start difference. First operand 14716 states and 21860 transitions. Second operand 8 states. [2020-12-22 10:03:54,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:03:54,210 INFO L93 Difference]: Finished difference Result 63722 states and 92571 transitions. [2020-12-22 10:03:54,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 10:03:54,210 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 112 [2020-12-22 10:03:54,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:03:54,316 INFO L225 Difference]: With dead ends: 63722 [2020-12-22 10:03:54,316 INFO L226 Difference]: Without dead ends: 55816 [2020-12-22 10:03:54,339 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-12-22 10:03:54,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55816 states. [2020-12-22 10:03:55,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55816 to 22620. [2020-12-22 10:03:55,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22620 states. [2020-12-22 10:03:55,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22620 states to 22620 states and 33188 transitions. [2020-12-22 10:03:55,798 INFO L78 Accepts]: Start accepts. Automaton has 22620 states and 33188 transitions. Word has length 112 [2020-12-22 10:03:55,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:03:55,799 INFO L481 AbstractCegarLoop]: Abstraction has 22620 states and 33188 transitions. [2020-12-22 10:03:55,799 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 10:03:55,799 INFO L276 IsEmpty]: Start isEmpty. Operand 22620 states and 33188 transitions. [2020-12-22 10:03:55,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-12-22 10:03:55,807 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:03:55,807 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:03:55,808 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 10:03:55,808 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:03:55,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:03:55,809 INFO L82 PathProgramCache]: Analyzing trace with hash -1381639519, now seen corresponding path program 1 times [2020-12-22 10:03:55,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:03:55,809 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275846620] [2020-12-22 10:03:55,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:03:55,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:03:55,969 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-12-22 10:03:55,969 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275846620] [2020-12-22 10:03:55,972 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:03:55,972 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 10:03:55,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118807530] [2020-12-22 10:03:55,973 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 10:03:55,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:03:55,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 10:03:55,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-12-22 10:03:55,974 INFO L87 Difference]: Start difference. First operand 22620 states and 33188 transitions. Second operand 8 states. [2020-12-22 10:03:59,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:03:59,166 INFO L93 Difference]: Finished difference Result 71626 states and 103899 transitions. [2020-12-22 10:03:59,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 10:03:59,166 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 112 [2020-12-22 10:03:59,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:03:59,269 INFO L225 Difference]: With dead ends: 71626 [2020-12-22 10:03:59,269 INFO L226 Difference]: Without dead ends: 63720 [2020-12-22 10:03:59,293 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-12-22 10:03:59,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63720 states. [2020-12-22 10:04:01,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63720 to 34492. [2020-12-22 10:04:01,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34492 states. [2020-12-22 10:04:01,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34492 states to 34492 states and 50100 transitions. [2020-12-22 10:04:01,485 INFO L78 Accepts]: Start accepts. Automaton has 34492 states and 50100 transitions. Word has length 112 [2020-12-22 10:04:01,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:04:01,486 INFO L481 AbstractCegarLoop]: Abstraction has 34492 states and 50100 transitions. [2020-12-22 10:04:01,486 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 10:04:01,486 INFO L276 IsEmpty]: Start isEmpty. Operand 34492 states and 50100 transitions. [2020-12-22 10:04:01,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-12-22 10:04:01,506 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:04:01,506 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:04:01,506 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 10:04:01,507 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:04:01,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:04:01,507 INFO L82 PathProgramCache]: Analyzing trace with hash -1107951807, now seen corresponding path program 1 times [2020-12-22 10:04:01,507 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:04:01,507 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863125675] [2020-12-22 10:04:01,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:04:01,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:04:01,655 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-12-22 10:04:01,656 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863125675] [2020-12-22 10:04:01,656 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:04:01,656 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 10:04:01,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404480605] [2020-12-22 10:04:01,656 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 10:04:01,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:04:01,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 10:04:01,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-12-22 10:04:01,657 INFO L87 Difference]: Start difference. First operand 34492 states and 50100 transitions. Second operand 8 states. [2020-12-22 10:04:05,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:04:05,328 INFO L93 Difference]: Finished difference Result 79530 states and 115227 transitions. [2020-12-22 10:04:05,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 10:04:05,329 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 112 [2020-12-22 10:04:05,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:04:05,398 INFO L225 Difference]: With dead ends: 79530 [2020-12-22 10:04:05,398 INFO L226 Difference]: Without dead ends: 71624 [2020-12-22 10:04:05,420 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-12-22 10:04:05,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71624 states. [2020-12-22 10:04:08,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71624 to 42396. [2020-12-22 10:04:08,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42396 states. [2020-12-22 10:04:08,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42396 states to 42396 states and 61428 transitions. [2020-12-22 10:04:08,351 INFO L78 Accepts]: Start accepts. Automaton has 42396 states and 61428 transitions. Word has length 112 [2020-12-22 10:04:08,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:04:08,352 INFO L481 AbstractCegarLoop]: Abstraction has 42396 states and 61428 transitions. [2020-12-22 10:04:08,352 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 10:04:08,352 INFO L276 IsEmpty]: Start isEmpty. Operand 42396 states and 61428 transitions. [2020-12-22 10:04:08,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-12-22 10:04:08,361 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:04:08,361 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:04:08,362 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 10:04:08,362 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:04:08,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:04:08,362 INFO L82 PathProgramCache]: Analyzing trace with hash 711119841, now seen corresponding path program 1 times [2020-12-22 10:04:08,363 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:04:08,363 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816189707] [2020-12-22 10:04:08,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:04:08,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:04:08,501 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 10:04:08,501 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816189707] [2020-12-22 10:04:08,501 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:04:08,501 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 10:04:08,502 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176065815] [2020-12-22 10:04:08,502 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 10:04:08,502 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:04:08,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 10:04:08,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-12-22 10:04:08,503 INFO L87 Difference]: Start difference. First operand 42396 states and 61428 transitions. Second operand 8 states. [2020-12-22 10:04:13,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:04:13,582 INFO L93 Difference]: Finished difference Result 87434 states and 126555 transitions. [2020-12-22 10:04:13,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 10:04:13,582 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 112 [2020-12-22 10:04:13,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:04:13,661 INFO L225 Difference]: With dead ends: 87434 [2020-12-22 10:04:13,661 INFO L226 Difference]: Without dead ends: 79528 [2020-12-22 10:04:13,686 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-12-22 10:04:13,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79528 states. [2020-12-22 10:04:17,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79528 to 50300. [2020-12-22 10:04:17,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50300 states. [2020-12-22 10:04:17,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50300 states to 50300 states and 72756 transitions. [2020-12-22 10:04:17,171 INFO L78 Accepts]: Start accepts. Automaton has 50300 states and 72756 transitions. Word has length 112 [2020-12-22 10:04:17,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:04:17,172 INFO L481 AbstractCegarLoop]: Abstraction has 50300 states and 72756 transitions. [2020-12-22 10:04:17,172 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 10:04:17,172 INFO L276 IsEmpty]: Start isEmpty. Operand 50300 states and 72756 transitions. [2020-12-22 10:04:17,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-12-22 10:04:17,182 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:04:17,182 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:04:17,183 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 10:04:17,183 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:04:17,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:04:17,183 INFO L82 PathProgramCache]: Analyzing trace with hash 890525825, now seen corresponding path program 1 times [2020-12-22 10:04:17,184 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:04:17,184 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506364535] [2020-12-22 10:04:17,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:04:17,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:04:17,353 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 10:04:17,353 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506364535] [2020-12-22 10:04:17,353 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:04:17,354 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 10:04:17,354 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650954119] [2020-12-22 10:04:17,354 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 10:04:17,355 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:04:17,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 10:04:17,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-12-22 10:04:17,355 INFO L87 Difference]: Start difference. First operand 50300 states and 72756 transitions. Second operand 8 states. [2020-12-22 10:04:23,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:04:23,265 INFO L93 Difference]: Finished difference Result 95338 states and 137883 transitions. [2020-12-22 10:04:23,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 10:04:23,265 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 112 [2020-12-22 10:04:23,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:04:23,350 INFO L225 Difference]: With dead ends: 95338 [2020-12-22 10:04:23,350 INFO L226 Difference]: Without dead ends: 87432 [2020-12-22 10:04:23,372 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-12-22 10:04:23,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87432 states. [2020-12-22 10:04:27,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87432 to 58204. [2020-12-22 10:04:27,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58204 states. [2020-12-22 10:04:27,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58204 states to 58204 states and 84084 transitions. [2020-12-22 10:04:27,711 INFO L78 Accepts]: Start accepts. Automaton has 58204 states and 84084 transitions. Word has length 112 [2020-12-22 10:04:27,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:04:27,711 INFO L481 AbstractCegarLoop]: Abstraction has 58204 states and 84084 transitions. [2020-12-22 10:04:27,711 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 10:04:27,711 INFO L276 IsEmpty]: Start isEmpty. Operand 58204 states and 84084 transitions. [2020-12-22 10:04:27,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-12-22 10:04:27,718 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:04:27,719 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:04:27,720 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 10:04:27,720 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:04:27,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:04:27,720 INFO L82 PathProgramCache]: Analyzing trace with hash -420877289, now seen corresponding path program 1 times [2020-12-22 10:04:27,720 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:04:27,720 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667065252] [2020-12-22 10:04:27,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:04:27,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:04:27,860 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 10:04:27,860 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667065252] [2020-12-22 10:04:27,860 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:04:27,860 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 10:04:27,861 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823161683] [2020-12-22 10:04:27,861 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 10:04:27,861 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:04:27,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 10:04:27,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-12-22 10:04:27,862 INFO L87 Difference]: Start difference. First operand 58204 states and 84084 transitions. Second operand 8 states. [2020-12-22 10:04:34,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:04:34,429 INFO L93 Difference]: Finished difference Result 98442 states and 142363 transitions. [2020-12-22 10:04:34,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 10:04:34,430 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 112 [2020-12-22 10:04:34,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:04:34,514 INFO L225 Difference]: With dead ends: 98442 [2020-12-22 10:04:34,514 INFO L226 Difference]: Without dead ends: 92936 [2020-12-22 10:04:34,535 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-12-22 10:04:34,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92936 states. [2020-12-22 10:04:39,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92936 to 63708. [2020-12-22 10:04:39,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63708 states. [2020-12-22 10:04:39,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63708 states to 63708 states and 92020 transitions. [2020-12-22 10:04:39,599 INFO L78 Accepts]: Start accepts. Automaton has 63708 states and 92020 transitions. Word has length 112 [2020-12-22 10:04:39,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:04:39,600 INFO L481 AbstractCegarLoop]: Abstraction has 63708 states and 92020 transitions. [2020-12-22 10:04:39,600 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 10:04:39,600 INFO L276 IsEmpty]: Start isEmpty. Operand 63708 states and 92020 transitions. [2020-12-22 10:04:39,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-12-22 10:04:39,609 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:04:39,610 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:04:39,610 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-12-22 10:04:39,610 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:04:39,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:04:39,611 INFO L82 PathProgramCache]: Analyzing trace with hash 746098925, now seen corresponding path program 1 times [2020-12-22 10:04:39,611 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:04:39,611 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124931565] [2020-12-22 10:04:39,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:04:39,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:04:39,688 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:04:39,689 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124931565] [2020-12-22 10:04:39,689 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:04:39,689 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:04:39,689 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029608233] [2020-12-22 10:04:39,690 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:04:39,690 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:04:39,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:04:39,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:04:39,691 INFO L87 Difference]: Start difference. First operand 63708 states and 92020 transitions. Second operand 3 states. [2020-12-22 10:04:44,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:04:44,004 INFO L93 Difference]: Finished difference Result 120608 states and 173606 transitions. [2020-12-22 10:04:44,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:04:44,005 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 113 [2020-12-22 10:04:44,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:04:44,069 INFO L225 Difference]: With dead ends: 120608 [2020-12-22 10:04:44,069 INFO L226 Difference]: Without dead ends: 63710 [2020-12-22 10:04:44,102 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 10:04:44,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63710 states. [2020-12-22 10:04:48,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63710 to 63708. [2020-12-22 10:04:48,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63708 states. [2020-12-22 10:04:48,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63708 states to 63708 states and 91332 transitions. [2020-12-22 10:04:48,790 INFO L78 Accepts]: Start accepts. Automaton has 63708 states and 91332 transitions. Word has length 113 [2020-12-22 10:04:48,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:04:48,791 INFO L481 AbstractCegarLoop]: Abstraction has 63708 states and 91332 transitions. [2020-12-22 10:04:48,791 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:04:48,791 INFO L276 IsEmpty]: Start isEmpty. Operand 63708 states and 91332 transitions. [2020-12-22 10:04:48,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-12-22 10:04:48,796 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:04:48,796 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:04:48,796 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-12-22 10:04:48,796 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:04:48,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:04:48,797 INFO L82 PathProgramCache]: Analyzing trace with hash -1169646557, now seen corresponding path program 1 times [2020-12-22 10:04:48,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:04:48,797 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789782523] [2020-12-22 10:04:48,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:04:48,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:04:48,866 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 10:04:48,867 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789782523] [2020-12-22 10:04:48,867 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:04:48,867 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:04:48,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054696306] [2020-12-22 10:04:48,868 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:04:48,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:04:48,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:04:48,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:04:48,869 INFO L87 Difference]: Start difference. First operand 63708 states and 91332 transitions. Second operand 3 states. [2020-12-22 10:04:51,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:04:51,738 INFO L93 Difference]: Finished difference Result 92160 states and 131782 transitions. [2020-12-22 10:04:51,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:04:51,739 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 113 [2020-12-22 10:04:51,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:04:51,774 INFO L225 Difference]: With dead ends: 92160 [2020-12-22 10:04:51,774 INFO L226 Difference]: Without dead ends: 35262 [2020-12-22 10:04:51,798 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 10:04:51,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35262 states. [2020-12-22 10:04:54,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35262 to 35260. [2020-12-22 10:04:54,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35260 states. [2020-12-22 10:04:54,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35260 states to 35260 states and 50540 transitions. [2020-12-22 10:04:54,181 INFO L78 Accepts]: Start accepts. Automaton has 35260 states and 50540 transitions. Word has length 113 [2020-12-22 10:04:54,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:04:54,181 INFO L481 AbstractCegarLoop]: Abstraction has 35260 states and 50540 transitions. [2020-12-22 10:04:54,181 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:04:54,181 INFO L276 IsEmpty]: Start isEmpty. Operand 35260 states and 50540 transitions. [2020-12-22 10:04:54,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-12-22 10:04:54,185 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:04:54,185 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] [2020-12-22 10:04:54,185 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-12-22 10:04:54,185 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:04:54,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:04:54,186 INFO L82 PathProgramCache]: Analyzing trace with hash 1209709145, now seen corresponding path program 1 times [2020-12-22 10:04:54,186 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:04:54,186 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762957894] [2020-12-22 10:04:54,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:04:54,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:04:54,263 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:04:54,264 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762957894] [2020-12-22 10:04:54,264 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:04:54,264 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:04:54,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398612714] [2020-12-22 10:04:54,265 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:04:54,265 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:04:54,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:04:54,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:04:54,266 INFO L87 Difference]: Start difference. First operand 35260 states and 50540 transitions. Second operand 3 states. [2020-12-22 10:04:55,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:04:55,550 INFO L93 Difference]: Finished difference Result 49488 states and 70594 transitions. [2020-12-22 10:04:55,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:04:55,550 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 113 [2020-12-22 10:04:55,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:04:55,570 INFO L225 Difference]: With dead ends: 49488 [2020-12-22 10:04:55,570 INFO L226 Difference]: Without dead ends: 21038 [2020-12-22 10:04:55,582 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 10:04:55,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21038 states. [2020-12-22 10:04:56,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21038 to 21036. [2020-12-22 10:04:56,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21036 states. [2020-12-22 10:04:56,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21036 states to 21036 states and 30316 transitions. [2020-12-22 10:04:56,806 INFO L78 Accepts]: Start accepts. Automaton has 21036 states and 30316 transitions. Word has length 113 [2020-12-22 10:04:56,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:04:56,806 INFO L481 AbstractCegarLoop]: Abstraction has 21036 states and 30316 transitions. [2020-12-22 10:04:56,806 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:04:56,806 INFO L276 IsEmpty]: Start isEmpty. Operand 21036 states and 30316 transitions. [2020-12-22 10:04:56,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-12-22 10:04:56,808 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:04:56,809 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] [2020-12-22 10:04:56,809 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-12-22 10:04:56,809 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:04:56,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:04:56,809 INFO L82 PathProgramCache]: Analyzing trace with hash -1498655857, now seen corresponding path program 1 times [2020-12-22 10:04:56,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:04:56,810 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634973004] [2020-12-22 10:04:56,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:04:56,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:04:56,877 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:04:56,877 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634973004] [2020-12-22 10:04:56,877 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:04:56,877 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:04:56,877 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160991896] [2020-12-22 10:04:56,878 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:04:56,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:04:56,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:04:56,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:04:56,879 INFO L87 Difference]: Start difference. First operand 21036 states and 30316 transitions. Second operand 3 states. [2020-12-22 10:04:57,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:04:57,707 INFO L93 Difference]: Finished difference Result 28152 states and 40258 transitions. [2020-12-22 10:04:57,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:04:57,707 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 113 [2020-12-22 10:04:57,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:04:57,720 INFO L225 Difference]: With dead ends: 28152 [2020-12-22 10:04:57,721 INFO L226 Difference]: Without dead ends: 13926 [2020-12-22 10:04:57,729 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 10:04:57,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13926 states. [2020-12-22 10:04:58,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13926 to 13924. [2020-12-22 10:04:58,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13924 states. [2020-12-22 10:04:58,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13924 states to 13924 states and 20290 transitions. [2020-12-22 10:04:58,431 INFO L78 Accepts]: Start accepts. Automaton has 13924 states and 20290 transitions. Word has length 113 [2020-12-22 10:04:58,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:04:58,431 INFO L481 AbstractCegarLoop]: Abstraction has 13924 states and 20290 transitions. [2020-12-22 10:04:58,431 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:04:58,431 INFO L276 IsEmpty]: Start isEmpty. Operand 13924 states and 20290 transitions. [2020-12-22 10:04:58,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-12-22 10:04:58,433 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:04:58,433 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 10:04:58,433 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-12-22 10:04:58,433 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:04:58,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:04:58,434 INFO L82 PathProgramCache]: Analyzing trace with hash -1585774651, now seen corresponding path program 1 times [2020-12-22 10:04:58,434 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:04:58,434 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568765050] [2020-12-22 10:04:58,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:04:58,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:04:58,786 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 11 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:04:58,787 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568765050] [2020-12-22 10:04:58,787 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [531942903] [2020-12-22 10:04:58,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:04:58,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:04:58,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 519 conjuncts, 25 conjunts are in the unsatisfiable core [2020-12-22 10:04:58,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:04:59,259 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 10:04:59,259 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:04:59,259 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 21 [2020-12-22 10:04:59,260 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120219550] [2020-12-22 10:04:59,260 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-22 10:04:59,260 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:04:59,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-22 10:04:59,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2020-12-22 10:04:59,261 INFO L87 Difference]: Start difference. First operand 13924 states and 20290 transitions. Second operand 21 states. [2020-12-22 10:04:59,641 WARN L197 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-12-22 10:04:59,867 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 42 [2020-12-22 10:05:03,439 WARN L197 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 46 [2020-12-22 10:05:03,796 WARN L197 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 45 [2020-12-22 10:05:03,995 WARN L197 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 49 [2020-12-22 10:05:04,245 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 43 [2020-12-22 10:05:04,572 WARN L197 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 46 [2020-12-22 10:05:10,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:05:10,283 INFO L93 Difference]: Finished difference Result 61803 states and 85595 transitions. [2020-12-22 10:05:10,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2020-12-22 10:05:10,284 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 113 [2020-12-22 10:05:10,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:05:10,372 INFO L225 Difference]: With dead ends: 61803 [2020-12-22 10:05:10,373 INFO L226 Difference]: Without dead ends: 54689 [2020-12-22 10:05:10,389 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3479 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=1672, Invalid=8228, Unknown=0, NotChecked=0, Total=9900 [2020-12-22 10:05:10,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54689 states. [2020-12-22 10:05:13,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54689 to 36944. [2020-12-22 10:05:13,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36944 states. [2020-12-22 10:05:13,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36944 states to 36944 states and 51458 transitions. [2020-12-22 10:05:13,817 INFO L78 Accepts]: Start accepts. Automaton has 36944 states and 51458 transitions. Word has length 113 [2020-12-22 10:05:13,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:05:13,818 INFO L481 AbstractCegarLoop]: Abstraction has 36944 states and 51458 transitions. [2020-12-22 10:05:13,818 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-22 10:05:13,818 INFO L276 IsEmpty]: Start isEmpty. Operand 36944 states and 51458 transitions. [2020-12-22 10:05:13,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-12-22 10:05:13,822 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:05:13,823 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 10:05:14,036 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-12-22 10:05:14,037 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:05:14,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:05:14,038 INFO L82 PathProgramCache]: Analyzing trace with hash -409173495, now seen corresponding path program 1 times [2020-12-22 10:05:14,038 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:05:14,039 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278751978] [2020-12-22 10:05:14,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:05:14,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:05:14,345 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 15 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:05:14,345 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278751978] [2020-12-22 10:05:14,345 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1108427099] [2020-12-22 10:05:14,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:05:14,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:05:14,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 524 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-22 10:05:14,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:05:14,720 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 10:05:15,069 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:05:15,070 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:05:15,070 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-12-22 10:05:15,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44407931] [2020-12-22 10:05:15,070 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-22 10:05:15,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:05:15,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-22 10:05:15,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2020-12-22 10:05:15,071 INFO L87 Difference]: Start difference. First operand 36944 states and 51458 transitions. Second operand 18 states. [2020-12-22 10:05:15,641 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-12-22 10:05:17,551 WARN L197 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-12-22 10:05:17,682 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2020-12-22 10:05:18,334 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2020-12-22 10:05:19,992 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 36 [2020-12-22 10:05:20,489 WARN L197 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 44 [2020-12-22 10:05:20,633 WARN L197 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-12-22 10:05:20,766 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 36 [2020-12-22 10:05:21,264 WARN L197 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 41 [2020-12-22 10:05:21,401 WARN L197 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-12-22 10:05:23,205 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 36 [2020-12-22 10:05:23,456 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2020-12-22 10:05:23,607 WARN L197 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-12-22 10:05:24,391 WARN L197 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 35 [2020-12-22 10:05:25,992 WARN L197 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-12-22 10:05:26,489 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-12-22 10:05:26,662 WARN L197 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-12-22 10:05:27,551 WARN L197 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 46 [2020-12-22 10:05:27,795 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2020-12-22 10:05:27,971 WARN L197 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 49 [2020-12-22 10:05:28,703 WARN L197 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-12-22 10:05:32,866 WARN L197 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 41 [2020-12-22 10:05:33,004 WARN L197 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-12-22 10:05:33,193 WARN L197 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 44 [2020-12-22 10:05:33,327 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 36 [2020-12-22 10:05:34,961 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 36 [2020-12-22 10:06:05,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:06:05,596 INFO L93 Difference]: Finished difference Result 395714 states and 535042 transitions. [2020-12-22 10:06:05,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2020-12-22 10:06:05,597 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 114 [2020-12-22 10:06:05,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:06:06,418 INFO L225 Difference]: With dead ends: 395714 [2020-12-22 10:06:06,419 INFO L226 Difference]: Without dead ends: 365580 [2020-12-22 10:06:06,544 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6383 ImplicationChecksByTransitivity, 11.5s TimeCoverageRelationStatistics Valid=2552, Invalid=14478, Unknown=0, NotChecked=0, Total=17030 [2020-12-22 10:06:06,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365580 states. [2020-12-22 10:06:22,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365580 to 143221. [2020-12-22 10:06:22,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143221 states. [2020-12-22 10:06:22,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143221 states to 143221 states and 192984 transitions. [2020-12-22 10:06:22,886 INFO L78 Accepts]: Start accepts. Automaton has 143221 states and 192984 transitions. Word has length 114 [2020-12-22 10:06:22,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:06:22,887 INFO L481 AbstractCegarLoop]: Abstraction has 143221 states and 192984 transitions. [2020-12-22 10:06:22,887 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-22 10:06:22,887 INFO L276 IsEmpty]: Start isEmpty. Operand 143221 states and 192984 transitions. [2020-12-22 10:06:22,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-12-22 10:06:22,891 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:06:22,891 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:06:23,091 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-12-22 10:06:23,093 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:06:23,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:06:23,094 INFO L82 PathProgramCache]: Analyzing trace with hash 1061210015, now seen corresponding path program 1 times [2020-12-22 10:06:23,095 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:06:23,095 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334551884] [2020-12-22 10:06:23,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:06:23,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:06:23,478 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:06:23,478 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334551884] [2020-12-22 10:06:23,478 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:06:23,479 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:06:23,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880919775] [2020-12-22 10:06:23,479 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:06:23,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:06:23,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:06:23,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:06:23,480 INFO L87 Difference]: Start difference. First operand 143221 states and 192984 transitions. Second operand 3 states. [2020-12-22 10:06:29,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:06:29,586 INFO L93 Difference]: Finished difference Result 195313 states and 262119 transitions. [2020-12-22 10:06:29,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:06:29,587 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 114 [2020-12-22 10:06:29,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:06:29,650 INFO L225 Difference]: With dead ends: 195313 [2020-12-22 10:06:29,650 INFO L226 Difference]: Without dead ends: 58902 [2020-12-22 10:06:29,708 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 10:06:29,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58902 states. [2020-12-22 10:06:35,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58902 to 55426. [2020-12-22 10:06:35,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55426 states. [2020-12-22 10:06:35,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55426 states to 55426 states and 74566 transitions. [2020-12-22 10:06:35,367 INFO L78 Accepts]: Start accepts. Automaton has 55426 states and 74566 transitions. Word has length 114 [2020-12-22 10:06:35,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:06:35,367 INFO L481 AbstractCegarLoop]: Abstraction has 55426 states and 74566 transitions. [2020-12-22 10:06:35,367 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:06:35,367 INFO L276 IsEmpty]: Start isEmpty. Operand 55426 states and 74566 transitions. [2020-12-22 10:06:35,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-12-22 10:06:35,370 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:06:35,371 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 10:06:35,371 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-12-22 10:06:35,371 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:06:35,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:06:35,371 INFO L82 PathProgramCache]: Analyzing trace with hash 707187499, now seen corresponding path program 1 times [2020-12-22 10:06:35,372 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:06:35,372 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613221877] [2020-12-22 10:06:35,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:06:35,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:06:35,471 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-22 10:06:35,471 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613221877] [2020-12-22 10:06:35,472 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:06:35,472 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 10:06:35,472 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744123337] [2020-12-22 10:06:35,472 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 10:06:35,472 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:06:35,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 10:06:35,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 10:06:35,473 INFO L87 Difference]: Start difference. First operand 55426 states and 74566 transitions. Second operand 6 states. [2020-12-22 10:06:40,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:06:40,800 INFO L93 Difference]: Finished difference Result 100897 states and 134790 transitions. [2020-12-22 10:06:40,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 10:06:40,801 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 114 [2020-12-22 10:06:40,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:06:40,854 INFO L225 Difference]: With dead ends: 100897 [2020-12-22 10:06:40,855 INFO L226 Difference]: Without dead ends: 52398 [2020-12-22 10:06:40,875 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 10:06:40,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52398 states.