/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.5.ufo.BOUNDED-10.pals+Problem12_label05.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 09:55:24,082 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 09:55:24,088 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 09:55:24,154 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 09:55:24,154 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 09:55:24,159 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 09:55:24,164 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 09:55:24,176 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 09:55:24,180 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 09:55:24,189 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 09:55:24,191 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 09:55:24,193 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 09:55:24,193 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 09:55:24,198 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 09:55:24,201 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 09:55:24,204 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 09:55:24,215 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 09:55:24,220 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 09:55:24,227 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 09:55:24,233 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 09:55:24,238 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 09:55:24,240 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 09:55:24,243 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 09:55:24,247 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 09:55:24,254 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 09:55:24,268 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 09:55:24,269 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 09:55:24,270 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 09:55:24,272 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 09:55:24,325 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 09:55:24,325 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 09:55:24,330 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 09:55:24,331 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 09:55:24,331 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 09:55:24,331 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 09:55:24,331 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 09:55:24,332 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 09:55:24,332 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 09:55:24,332 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 09:55:24,333 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 09:55:24,333 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 09:55:24,334 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 09:55:24,334 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 09:55:24,334 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 09:55:24,334 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 09:55:24,334 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 09:55:24,335 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 09:55:24,335 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 09:55:24,335 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 09:55:24,335 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 09:55:24,335 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 09:55:24,336 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 09:55:24,336 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 09:55:24,336 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 09:55:24,336 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 09:55:24,753 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 09:55:24,802 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 09:55:24,805 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 09:55:24,806 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 09:55:24,807 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 09:55:24,808 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pals_lcr.5.ufo.BOUNDED-10.pals+Problem12_label05.c [2020-12-22 09:55:24,904 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5ea8a98a6/ca42f8344ee74cf481a30c4cb18fb269/FLAGde854801d [2020-12-22 09:55:26,086 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 09:55:26,087 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.5.ufo.BOUNDED-10.pals+Problem12_label05.c [2020-12-22 09:55:26,129 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5ea8a98a6/ca42f8344ee74cf481a30c4cb18fb269/FLAGde854801d [2020-12-22 09:55:26,619 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5ea8a98a6/ca42f8344ee74cf481a30c4cb18fb269 [2020-12-22 09:55:26,622 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 09:55:26,624 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 09:55:26,627 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 09:55:26,627 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 09:55:26,631 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 09:55:26,632 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 09:55:26" (1/1) ... [2020-12-22 09:55:26,635 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3c0362d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:55:26, skipping insertion in model container [2020-12-22 09:55:26,635 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 09:55:26" (1/1) ... [2020-12-22 09:55:26,643 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 09:55:26,814 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 09:55:27,195 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.5.ufo.BOUNDED-10.pals+Problem12_label05.c[11730,11743] [2020-12-22 09:55:27,287 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.5.ufo.BOUNDED-10.pals+Problem12_label05.c[18423,18436] [2020-12-22 09:55:28,254 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 09:55:28,267 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 09:55:28,342 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.5.ufo.BOUNDED-10.pals+Problem12_label05.c[11730,11743] [2020-12-22 09:55:28,357 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.5.ufo.BOUNDED-10.pals+Problem12_label05.c[18423,18436] [2020-12-22 09:55:29,049 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 09:55:29,093 INFO L208 MainTranslator]: Completed translation [2020-12-22 09:55:29,094 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:55:29 WrapperNode [2020-12-22 09:55:29,095 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 09:55:29,097 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 09:55:29,097 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 09:55:29,097 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 09:55:29,106 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:55:29" (1/1) ... [2020-12-22 09:55:29,194 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:55:29" (1/1) ... [2020-12-22 09:55:29,636 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 09:55:29,637 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 09:55:29,637 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 09:55:29,637 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 09:55:29,647 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:55:29" (1/1) ... [2020-12-22 09:55:29,647 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:55:29" (1/1) ... [2020-12-22 09:55:29,821 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:55:29" (1/1) ... [2020-12-22 09:55:29,822 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:55:29" (1/1) ... [2020-12-22 09:55:30,084 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:55:29" (1/1) ... [2020-12-22 09:55:30,130 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:55:29" (1/1) ... [2020-12-22 09:55:30,187 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:55:29" (1/1) ... [2020-12-22 09:55:30,290 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 09:55:30,292 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 09:55:30,292 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 09:55:30,293 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 09:55:30,293 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:55:29" (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 09:55:30,396 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 09:55:30,397 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 09:55:30,397 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 09:55:30,397 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 09:55:36,721 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 09:55:36,722 INFO L299 CfgBuilder]: Removed 36 assume(true) statements. [2020-12-22 09:55:36,727 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 09:55:36 BoogieIcfgContainer [2020-12-22 09:55:36,728 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 09:55:36,730 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 09:55:36,733 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 09:55:36,737 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 09:55:36,737 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 09:55:26" (1/3) ... [2020-12-22 09:55:36,739 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@727583e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 09:55:36, skipping insertion in model container [2020-12-22 09:55:36,739 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:55:29" (2/3) ... [2020-12-22 09:55:36,739 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@727583e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 09:55:36, skipping insertion in model container [2020-12-22 09:55:36,739 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 09:55:36" (3/3) ... [2020-12-22 09:55:36,741 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.5.ufo.BOUNDED-10.pals+Problem12_label05.c [2020-12-22 09:55:36,752 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 09:55:36,759 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-22 09:55:36,780 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-22 09:55:36,831 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 09:55:36,832 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 09:55:36,832 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 09:55:36,832 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 09:55:36,832 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 09:55:36,832 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 09:55:36,833 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 09:55:36,833 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 09:55:36,875 INFO L276 IsEmpty]: Start isEmpty. Operand 909 states. [2020-12-22 09:55:36,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-12-22 09:55:36,892 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:55:36,893 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] [2020-12-22 09:55:36,894 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:55:36,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:55:36,903 INFO L82 PathProgramCache]: Analyzing trace with hash -441366565, now seen corresponding path program 1 times [2020-12-22 09:55:36,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:55:36,917 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864328303] [2020-12-22 09:55:36,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:55:37,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:55:37,159 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 09:55:37,163 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864328303] [2020-12-22 09:55:37,164 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:55:37,164 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 09:55:37,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798664230] [2020-12-22 09:55:37,171 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 09:55:37,172 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:55:37,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 09:55:37,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 09:55:37,193 INFO L87 Difference]: Start difference. First operand 909 states. Second operand 2 states. [2020-12-22 09:55:37,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:55:37,294 INFO L93 Difference]: Finished difference Result 1781 states and 3374 transitions. [2020-12-22 09:55:37,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 09:55:37,296 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 34 [2020-12-22 09:55:37,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:55:37,337 INFO L225 Difference]: With dead ends: 1781 [2020-12-22 09:55:37,338 INFO L226 Difference]: Without dead ends: 843 [2020-12-22 09:55:37,350 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 09:55:37,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 843 states. [2020-12-22 09:55:37,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 843 to 843. [2020-12-22 09:55:37,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 843 states. [2020-12-22 09:55:37,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 843 states to 843 states and 1589 transitions. [2020-12-22 09:55:37,508 INFO L78 Accepts]: Start accepts. Automaton has 843 states and 1589 transitions. Word has length 34 [2020-12-22 09:55:37,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:55:37,509 INFO L481 AbstractCegarLoop]: Abstraction has 843 states and 1589 transitions. [2020-12-22 09:55:37,509 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 09:55:37,509 INFO L276 IsEmpty]: Start isEmpty. Operand 843 states and 1589 transitions. [2020-12-22 09:55:37,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-12-22 09:55:37,518 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:55:37,518 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] [2020-12-22 09:55:37,519 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 09:55:37,519 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:55:37,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:55:37,522 INFO L82 PathProgramCache]: Analyzing trace with hash -950839655, now seen corresponding path program 1 times [2020-12-22 09:55:37,522 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:55:37,523 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059327894] [2020-12-22 09:55:37,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:55:37,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:55:37,792 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 09:55:37,793 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059327894] [2020-12-22 09:55:37,793 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:55:37,793 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:55:37,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677088359] [2020-12-22 09:55:37,795 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:55:37,796 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:55:37,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:55:37,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:55:37,797 INFO L87 Difference]: Start difference. First operand 843 states and 1589 transitions. Second operand 5 states. [2020-12-22 09:55:37,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:55:37,980 INFO L93 Difference]: Finished difference Result 899 states and 1675 transitions. [2020-12-22 09:55:37,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 09:55:37,981 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 34 [2020-12-22 09:55:37,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:55:37,987 INFO L225 Difference]: With dead ends: 899 [2020-12-22 09:55:37,988 INFO L226 Difference]: Without dead ends: 843 [2020-12-22 09:55:37,990 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 09:55:37,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 843 states. [2020-12-22 09:55:38,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 843 to 843. [2020-12-22 09:55:38,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 843 states. [2020-12-22 09:55:38,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 843 states to 843 states and 1558 transitions. [2020-12-22 09:55:38,021 INFO L78 Accepts]: Start accepts. Automaton has 843 states and 1558 transitions. Word has length 34 [2020-12-22 09:55:38,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:55:38,022 INFO L481 AbstractCegarLoop]: Abstraction has 843 states and 1558 transitions. [2020-12-22 09:55:38,022 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:55:38,022 INFO L276 IsEmpty]: Start isEmpty. Operand 843 states and 1558 transitions. [2020-12-22 09:55:38,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-12-22 09:55:38,024 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:55:38,024 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:55:38,024 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 09:55:38,025 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:55:38,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:55:38,025 INFO L82 PathProgramCache]: Analyzing trace with hash 2075627621, now seen corresponding path program 1 times [2020-12-22 09:55:38,026 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:55:38,026 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854174109] [2020-12-22 09:55:38,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:55:38,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:55:38,162 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 09:55:38,163 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854174109] [2020-12-22 09:55:38,163 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:55:38,163 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 09:55:38,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020613763] [2020-12-22 09:55:38,164 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:55:38,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:55:38,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:55:38,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:55:38,166 INFO L87 Difference]: Start difference. First operand 843 states and 1558 transitions. Second operand 3 states. [2020-12-22 09:55:44,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:55:44,377 INFO L93 Difference]: Finished difference Result 2347 states and 4431 transitions. [2020-12-22 09:55:44,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:55:44,378 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 60 [2020-12-22 09:55:44,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:55:44,389 INFO L225 Difference]: With dead ends: 2347 [2020-12-22 09:55:44,390 INFO L226 Difference]: Without dead ends: 1594 [2020-12-22 09:55:44,392 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 09:55:44,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1594 states. [2020-12-22 09:55:44,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1594 to 1594. [2020-12-22 09:55:44,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1594 states. [2020-12-22 09:55:44,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1594 states to 1594 states and 2537 transitions. [2020-12-22 09:55:44,442 INFO L78 Accepts]: Start accepts. Automaton has 1594 states and 2537 transitions. Word has length 60 [2020-12-22 09:55:44,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:55:44,442 INFO L481 AbstractCegarLoop]: Abstraction has 1594 states and 2537 transitions. [2020-12-22 09:55:44,442 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:55:44,443 INFO L276 IsEmpty]: Start isEmpty. Operand 1594 states and 2537 transitions. [2020-12-22 09:55:44,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 09:55:44,444 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:55:44,445 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:55:44,445 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 09:55:44,445 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:55:44,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:55:44,446 INFO L82 PathProgramCache]: Analyzing trace with hash -695028240, now seen corresponding path program 1 times [2020-12-22 09:55:44,446 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:55:44,446 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927332693] [2020-12-22 09:55:44,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:55:44,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:55:44,538 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 09:55:44,538 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927332693] [2020-12-22 09:55:44,539 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:55:44,539 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:55:44,539 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761327022] [2020-12-22 09:55:44,540 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:55:44,540 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:55:44,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:55:44,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:55:44,541 INFO L87 Difference]: Start difference. First operand 1594 states and 2537 transitions. Second operand 3 states. [2020-12-22 09:55:44,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:55:44,590 INFO L93 Difference]: Finished difference Result 1692 states and 2691 transitions. [2020-12-22 09:55:44,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:55:44,591 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 64 [2020-12-22 09:55:44,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:55:44,600 INFO L225 Difference]: With dead ends: 1692 [2020-12-22 09:55:44,601 INFO L226 Difference]: Without dead ends: 1640 [2020-12-22 09:55:44,602 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 09:55:44,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1640 states. [2020-12-22 09:55:44,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1640 to 1638. [2020-12-22 09:55:44,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1638 states. [2020-12-22 09:55:44,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1638 states to 1638 states and 2607 transitions. [2020-12-22 09:55:44,648 INFO L78 Accepts]: Start accepts. Automaton has 1638 states and 2607 transitions. Word has length 64 [2020-12-22 09:55:44,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:55:44,649 INFO L481 AbstractCegarLoop]: Abstraction has 1638 states and 2607 transitions. [2020-12-22 09:55:44,649 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:55:44,649 INFO L276 IsEmpty]: Start isEmpty. Operand 1638 states and 2607 transitions. [2020-12-22 09:55:44,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 09:55:44,650 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:55:44,651 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:55:44,651 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 09:55:44,651 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:55:44,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:55:44,652 INFO L82 PathProgramCache]: Analyzing trace with hash -1440610970, now seen corresponding path program 1 times [2020-12-22 09:55:44,652 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:55:44,652 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354943176] [2020-12-22 09:55:44,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:55:44,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:55:44,756 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 09:55:44,756 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354943176] [2020-12-22 09:55:44,757 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:55:44,760 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:55:44,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124189131] [2020-12-22 09:55:44,761 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:55:44,761 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:55:44,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:55:44,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:55:44,762 INFO L87 Difference]: Start difference. First operand 1638 states and 2607 transitions. Second operand 3 states. [2020-12-22 09:55:44,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:55:44,807 INFO L93 Difference]: Finished difference Result 1818 states and 2891 transitions. [2020-12-22 09:55:44,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:55:44,807 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 64 [2020-12-22 09:55:44,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:55:44,817 INFO L225 Difference]: With dead ends: 1818 [2020-12-22 09:55:44,818 INFO L226 Difference]: Without dead ends: 1722 [2020-12-22 09:55:44,819 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 09:55:44,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1722 states. [2020-12-22 09:55:44,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1722 to 1720. [2020-12-22 09:55:44,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1720 states. [2020-12-22 09:55:44,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1720 states to 1720 states and 2736 transitions. [2020-12-22 09:55:44,873 INFO L78 Accepts]: Start accepts. Automaton has 1720 states and 2736 transitions. Word has length 64 [2020-12-22 09:55:44,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:55:44,873 INFO L481 AbstractCegarLoop]: Abstraction has 1720 states and 2736 transitions. [2020-12-22 09:55:44,874 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:55:44,874 INFO L276 IsEmpty]: Start isEmpty. Operand 1720 states and 2736 transitions. [2020-12-22 09:55:44,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 09:55:44,875 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:55:44,876 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:55:44,876 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 09:55:44,876 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:55:44,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:55:44,877 INFO L82 PathProgramCache]: Analyzing trace with hash 914325468, now seen corresponding path program 1 times [2020-12-22 09:55:44,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:55:44,877 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892987647] [2020-12-22 09:55:44,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:55:44,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:55:44,956 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 09:55:44,957 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892987647] [2020-12-22 09:55:44,957 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:55:44,957 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:55:44,958 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078000994] [2020-12-22 09:55:44,958 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:55:44,958 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:55:44,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:55:44,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:55:44,959 INFO L87 Difference]: Start difference. First operand 1720 states and 2736 transitions. Second operand 3 states. [2020-12-22 09:55:45,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:55:45,016 INFO L93 Difference]: Finished difference Result 2052 states and 3258 transitions. [2020-12-22 09:55:45,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:55:45,019 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 64 [2020-12-22 09:55:45,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:55:45,041 INFO L225 Difference]: With dead ends: 2052 [2020-12-22 09:55:45,041 INFO L226 Difference]: Without dead ends: 1874 [2020-12-22 09:55:45,043 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 09:55:45,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1874 states. [2020-12-22 09:55:45,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1874 to 1872. [2020-12-22 09:55:45,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1872 states. [2020-12-22 09:55:45,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1872 states to 1872 states and 2972 transitions. [2020-12-22 09:55:45,109 INFO L78 Accepts]: Start accepts. Automaton has 1872 states and 2972 transitions. Word has length 64 [2020-12-22 09:55:45,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:55:45,109 INFO L481 AbstractCegarLoop]: Abstraction has 1872 states and 2972 transitions. [2020-12-22 09:55:45,109 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:55:45,109 INFO L276 IsEmpty]: Start isEmpty. Operand 1872 states and 2972 transitions. [2020-12-22 09:55:45,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 09:55:45,111 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:55:45,111 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:55:45,111 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 09:55:45,112 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:55:45,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:55:45,116 INFO L82 PathProgramCache]: Analyzing trace with hash -1701027568, now seen corresponding path program 1 times [2020-12-22 09:55:45,116 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:55:45,116 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052258535] [2020-12-22 09:55:45,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:55:45,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:55:45,233 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 09:55:45,233 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052258535] [2020-12-22 09:55:45,234 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:55:45,235 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:55:45,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522805581] [2020-12-22 09:55:45,236 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:55:45,236 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:55:45,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:55:45,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:55:45,237 INFO L87 Difference]: Start difference. First operand 1872 states and 2972 transitions. Second operand 3 states. [2020-12-22 09:55:45,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:55:45,297 INFO L93 Difference]: Finished difference Result 2484 states and 3926 transitions. [2020-12-22 09:55:45,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:55:45,298 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 64 [2020-12-22 09:55:45,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:55:45,311 INFO L225 Difference]: With dead ends: 2484 [2020-12-22 09:55:45,311 INFO L226 Difference]: Without dead ends: 2154 [2020-12-22 09:55:45,313 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 09:55:45,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2154 states. [2020-12-22 09:55:45,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2154 to 2152. [2020-12-22 09:55:45,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2152 states. [2020-12-22 09:55:45,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2152 states to 2152 states and 3400 transitions. [2020-12-22 09:55:45,427 INFO L78 Accepts]: Start accepts. Automaton has 2152 states and 3400 transitions. Word has length 64 [2020-12-22 09:55:45,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:55:45,429 INFO L481 AbstractCegarLoop]: Abstraction has 2152 states and 3400 transitions. [2020-12-22 09:55:45,429 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:55:45,429 INFO L276 IsEmpty]: Start isEmpty. Operand 2152 states and 3400 transitions. [2020-12-22 09:55:45,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 09:55:45,430 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:55:45,430 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:55:45,430 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 09:55:45,430 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:55:45,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:55:45,431 INFO L82 PathProgramCache]: Analyzing trace with hash -1105068988, now seen corresponding path program 1 times [2020-12-22 09:55:45,431 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:55:45,431 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310920082] [2020-12-22 09:55:45,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:55:45,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:55:45,504 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 09:55:45,505 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310920082] [2020-12-22 09:55:45,505 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:55:45,506 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:55:45,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308431321] [2020-12-22 09:55:45,507 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:55:45,508 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:55:45,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:55:45,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:55:45,509 INFO L87 Difference]: Start difference. First operand 2152 states and 3400 transitions. Second operand 3 states. [2020-12-22 09:55:45,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:55:45,579 INFO L93 Difference]: Finished difference Result 3276 states and 5130 transitions. [2020-12-22 09:55:45,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:55:45,580 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 64 [2020-12-22 09:55:45,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:55:45,594 INFO L225 Difference]: With dead ends: 3276 [2020-12-22 09:55:45,595 INFO L226 Difference]: Without dead ends: 2666 [2020-12-22 09:55:45,598 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 09:55:45,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2666 states. [2020-12-22 09:55:45,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2666 to 2664. [2020-12-22 09:55:45,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2664 states. [2020-12-22 09:55:45,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2664 states to 2664 states and 4168 transitions. [2020-12-22 09:55:45,698 INFO L78 Accepts]: Start accepts. Automaton has 2664 states and 4168 transitions. Word has length 64 [2020-12-22 09:55:45,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:55:45,699 INFO L481 AbstractCegarLoop]: Abstraction has 2664 states and 4168 transitions. [2020-12-22 09:55:45,700 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:55:45,700 INFO L276 IsEmpty]: Start isEmpty. Operand 2664 states and 4168 transitions. [2020-12-22 09:55:45,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 09:55:45,700 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:55:45,701 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:55:45,701 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 09:55:45,701 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:55:45,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:55:45,702 INFO L82 PathProgramCache]: Analyzing trace with hash 112916410, now seen corresponding path program 1 times [2020-12-22 09:55:45,702 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:55:45,707 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473850390] [2020-12-22 09:55:45,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:55:45,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:55:45,838 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 09:55:45,838 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473850390] [2020-12-22 09:55:45,840 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:55:45,840 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 09:55:45,840 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304247754] [2020-12-22 09:55:45,841 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 09:55:45,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:55:45,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 09:55:45,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:55:45,842 INFO L87 Difference]: Start difference. First operand 2664 states and 4168 transitions. Second operand 7 states. [2020-12-22 09:55:46,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:55:46,533 INFO L93 Difference]: Finished difference Result 13884 states and 21298 transitions. [2020-12-22 09:55:46,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-22 09:55:46,534 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 64 [2020-12-22 09:55:46,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:55:46,626 INFO L225 Difference]: With dead ends: 13884 [2020-12-22 09:55:46,626 INFO L226 Difference]: Without dead ends: 12762 [2020-12-22 09:55:46,636 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2020-12-22 09:55:46,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12762 states. [2020-12-22 09:55:46,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12762 to 3784. [2020-12-22 09:55:46,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3784 states. [2020-12-22 09:55:46,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3784 states to 3784 states and 5816 transitions. [2020-12-22 09:55:46,955 INFO L78 Accepts]: Start accepts. Automaton has 3784 states and 5816 transitions. Word has length 64 [2020-12-22 09:55:46,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:55:46,956 INFO L481 AbstractCegarLoop]: Abstraction has 3784 states and 5816 transitions. [2020-12-22 09:55:46,956 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 09:55:46,956 INFO L276 IsEmpty]: Start isEmpty. Operand 3784 states and 5816 transitions. [2020-12-22 09:55:46,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 09:55:46,961 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:55:46,961 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] [2020-12-22 09:55:46,962 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 09:55:46,962 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:55:46,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:55:46,962 INFO L82 PathProgramCache]: Analyzing trace with hash -277208054, now seen corresponding path program 1 times [2020-12-22 09:55:46,963 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:55:46,963 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855083776] [2020-12-22 09:55:46,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:55:46,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:55:47,021 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 09:55:47,022 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855083776] [2020-12-22 09:55:47,022 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:55:47,022 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:55:47,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586223673] [2020-12-22 09:55:47,023 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:55:47,023 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:55:47,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:55:47,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:55:47,028 INFO L87 Difference]: Start difference. First operand 3784 states and 5816 transitions. Second operand 3 states. [2020-12-22 09:55:47,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:55:47,305 INFO L93 Difference]: Finished difference Result 7070 states and 10732 transitions. [2020-12-22 09:55:47,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:55:47,307 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 66 [2020-12-22 09:55:47,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:55:47,323 INFO L225 Difference]: With dead ends: 7070 [2020-12-22 09:55:47,323 INFO L226 Difference]: Without dead ends: 4828 [2020-12-22 09:55:47,330 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 09:55:47,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4828 states. [2020-12-22 09:55:47,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4828 to 4826. [2020-12-22 09:55:47,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4826 states. [2020-12-22 09:55:47,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4826 states to 4826 states and 7322 transitions. [2020-12-22 09:55:47,790 INFO L78 Accepts]: Start accepts. Automaton has 4826 states and 7322 transitions. Word has length 66 [2020-12-22 09:55:47,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:55:47,791 INFO L481 AbstractCegarLoop]: Abstraction has 4826 states and 7322 transitions. [2020-12-22 09:55:47,791 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:55:47,791 INFO L276 IsEmpty]: Start isEmpty. Operand 4826 states and 7322 transitions. [2020-12-22 09:55:47,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 09:55:47,795 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:55:47,795 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] [2020-12-22 09:55:47,795 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 09:55:47,795 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:55:47,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:55:47,796 INFO L82 PathProgramCache]: Analyzing trace with hash -210714542, now seen corresponding path program 1 times [2020-12-22 09:55:47,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:55:47,796 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130980163] [2020-12-22 09:55:47,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:55:47,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:55:48,037 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 09:55:48,038 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130980163] [2020-12-22 09:55:48,038 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:55:48,038 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 09:55:48,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358765556] [2020-12-22 09:55:48,039 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 09:55:48,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:55:48,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 09:55:48,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:55:48,042 INFO L87 Difference]: Start difference. First operand 4826 states and 7322 transitions. Second operand 7 states. [2020-12-22 09:55:48,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:55:48,586 INFO L93 Difference]: Finished difference Result 8110 states and 12188 transitions. [2020-12-22 09:55:48,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 09:55:48,587 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 66 [2020-12-22 09:55:48,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:55:48,602 INFO L225 Difference]: With dead ends: 8110 [2020-12-22 09:55:48,602 INFO L226 Difference]: Without dead ends: 4828 [2020-12-22 09:55:48,610 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2020-12-22 09:55:48,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4828 states. [2020-12-22 09:55:48,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4828 to 4826. [2020-12-22 09:55:48,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4826 states. [2020-12-22 09:55:48,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4826 states to 4826 states and 7274 transitions. [2020-12-22 09:55:48,982 INFO L78 Accepts]: Start accepts. Automaton has 4826 states and 7274 transitions. Word has length 66 [2020-12-22 09:55:48,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:55:48,982 INFO L481 AbstractCegarLoop]: Abstraction has 4826 states and 7274 transitions. [2020-12-22 09:55:48,982 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 09:55:48,982 INFO L276 IsEmpty]: Start isEmpty. Operand 4826 states and 7274 transitions. [2020-12-22 09:55:48,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-22 09:55:48,983 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:55:48,984 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:55:48,984 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 09:55:48,984 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:55:48,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:55:48,985 INFO L82 PathProgramCache]: Analyzing trace with hash 1643060746, now seen corresponding path program 1 times [2020-12-22 09:55:48,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:55:48,985 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979647858] [2020-12-22 09:55:48,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:55:49,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:55:49,132 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 09:55:49,132 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979647858] [2020-12-22 09:55:49,133 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:55:49,133 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:55:49,133 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365725362] [2020-12-22 09:55:49,133 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:55:49,134 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:55:49,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:55:49,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:55:49,135 INFO L87 Difference]: Start difference. First operand 4826 states and 7274 transitions. Second operand 6 states. [2020-12-22 09:55:49,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:55:49,576 INFO L93 Difference]: Finished difference Result 8108 states and 12091 transitions. [2020-12-22 09:55:49,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:55:49,576 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 67 [2020-12-22 09:55:49,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:55:49,589 INFO L225 Difference]: With dead ends: 8108 [2020-12-22 09:55:49,589 INFO L226 Difference]: Without dead ends: 4826 [2020-12-22 09:55:49,597 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 09:55:49,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4826 states. [2020-12-22 09:55:49,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4826 to 4826. [2020-12-22 09:55:49,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4826 states. [2020-12-22 09:55:49,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4826 states to 4826 states and 7226 transitions. [2020-12-22 09:55:49,925 INFO L78 Accepts]: Start accepts. Automaton has 4826 states and 7226 transitions. Word has length 67 [2020-12-22 09:55:49,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:55:49,926 INFO L481 AbstractCegarLoop]: Abstraction has 4826 states and 7226 transitions. [2020-12-22 09:55:49,926 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:55:49,926 INFO L276 IsEmpty]: Start isEmpty. Operand 4826 states and 7226 transitions. [2020-12-22 09:55:49,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-22 09:55:49,927 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:55:49,927 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:55:49,927 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 09:55:49,928 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:55:49,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:55:49,928 INFO L82 PathProgramCache]: Analyzing trace with hash -1372042872, now seen corresponding path program 1 times [2020-12-22 09:55:49,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:55:49,929 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243936687] [2020-12-22 09:55:49,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:55:49,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:55:50,028 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 09:55:50,029 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243936687] [2020-12-22 09:55:50,029 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:55:50,029 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:55:50,029 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225926204] [2020-12-22 09:55:50,030 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:55:50,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:55:50,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:55:50,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:55:50,037 INFO L87 Difference]: Start difference. First operand 4826 states and 7226 transitions. Second operand 6 states. [2020-12-22 09:55:50,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:55:50,469 INFO L93 Difference]: Finished difference Result 8108 states and 11995 transitions. [2020-12-22 09:55:50,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:55:50,470 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 67 [2020-12-22 09:55:50,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:55:50,482 INFO L225 Difference]: With dead ends: 8108 [2020-12-22 09:55:50,482 INFO L226 Difference]: Without dead ends: 4826 [2020-12-22 09:55:50,489 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 09:55:50,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4826 states. [2020-12-22 09:55:50,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4826 to 4826. [2020-12-22 09:55:50,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4826 states. [2020-12-22 09:55:50,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4826 states to 4826 states and 7178 transitions. [2020-12-22 09:55:50,915 INFO L78 Accepts]: Start accepts. Automaton has 4826 states and 7178 transitions. Word has length 67 [2020-12-22 09:55:50,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:55:50,915 INFO L481 AbstractCegarLoop]: Abstraction has 4826 states and 7178 transitions. [2020-12-22 09:55:50,915 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:55:50,916 INFO L276 IsEmpty]: Start isEmpty. Operand 4826 states and 7178 transitions. [2020-12-22 09:55:50,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-22 09:55:50,916 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:55:50,916 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:55:50,917 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 09:55:50,917 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:55:50,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:55:50,917 INFO L82 PathProgramCache]: Analyzing trace with hash 316900870, now seen corresponding path program 1 times [2020-12-22 09:55:50,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:55:50,918 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337742864] [2020-12-22 09:55:50,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:55:50,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:55:51,021 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 09:55:51,022 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337742864] [2020-12-22 09:55:51,022 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:55:51,022 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:55:51,022 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402648834] [2020-12-22 09:55:51,023 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:55:51,023 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:55:51,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:55:51,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:55:51,024 INFO L87 Difference]: Start difference. First operand 4826 states and 7178 transitions. Second operand 5 states. [2020-12-22 09:55:51,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:55:51,589 INFO L93 Difference]: Finished difference Result 7669 states and 11152 transitions. [2020-12-22 09:55:51,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 09:55:51,590 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 67 [2020-12-22 09:55:51,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:55:51,613 INFO L225 Difference]: With dead ends: 7669 [2020-12-22 09:55:51,613 INFO L226 Difference]: Without dead ends: 7667 [2020-12-22 09:55:51,619 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-12-22 09:55:51,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7667 states. [2020-12-22 09:55:52,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7667 to 5018. [2020-12-22 09:55:52,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5018 states. [2020-12-22 09:55:52,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5018 states to 5018 states and 7354 transitions. [2020-12-22 09:55:52,030 INFO L78 Accepts]: Start accepts. Automaton has 5018 states and 7354 transitions. Word has length 67 [2020-12-22 09:55:52,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:55:52,030 INFO L481 AbstractCegarLoop]: Abstraction has 5018 states and 7354 transitions. [2020-12-22 09:55:52,031 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:55:52,031 INFO L276 IsEmpty]: Start isEmpty. Operand 5018 states and 7354 transitions. [2020-12-22 09:55:52,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-12-22 09:55:52,034 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:55:52,035 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 09:55:52,035 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 09:55:52,035 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:55:52,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:55:52,036 INFO L82 PathProgramCache]: Analyzing trace with hash -1065285143, now seen corresponding path program 1 times [2020-12-22 09:55:52,036 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:55:52,037 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125867648] [2020-12-22 09:55:52,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:55:52,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:55:52,172 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-12-22 09:55:52,173 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125867648] [2020-12-22 09:55:52,173 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:55:52,173 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 09:55:52,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984602064] [2020-12-22 09:55:52,174 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 09:55:52,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:55:52,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 09:55:52,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:55:52,175 INFO L87 Difference]: Start difference. First operand 5018 states and 7354 transitions. Second operand 7 states. [2020-12-22 09:55:53,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:55:53,882 INFO L93 Difference]: Finished difference Result 23094 states and 32784 transitions. [2020-12-22 09:55:53,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 09:55:53,883 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 95 [2020-12-22 09:55:53,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:55:53,941 INFO L225 Difference]: With dead ends: 23094 [2020-12-22 09:55:53,942 INFO L226 Difference]: Without dead ends: 19620 [2020-12-22 09:55:53,958 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-12-22 09:55:53,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19620 states. [2020-12-22 09:55:54,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19620 to 8490. [2020-12-22 09:55:54,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8490 states. [2020-12-22 09:55:54,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8490 states to 8490 states and 12202 transitions. [2020-12-22 09:55:54,760 INFO L78 Accepts]: Start accepts. Automaton has 8490 states and 12202 transitions. Word has length 95 [2020-12-22 09:55:54,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:55:54,761 INFO L481 AbstractCegarLoop]: Abstraction has 8490 states and 12202 transitions. [2020-12-22 09:55:54,761 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 09:55:54,761 INFO L276 IsEmpty]: Start isEmpty. Operand 8490 states and 12202 transitions. [2020-12-22 09:55:54,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-12-22 09:55:54,766 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:55:54,766 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 09:55:54,767 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 09:55:54,767 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:55:54,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:55:54,768 INFO L82 PathProgramCache]: Analyzing trace with hash 1460899337, now seen corresponding path program 1 times [2020-12-22 09:55:54,768 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:55:54,768 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279370124] [2020-12-22 09:55:54,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:55:54,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:55:54,890 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-12-22 09:55:54,890 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279370124] [2020-12-22 09:55:54,893 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:55:54,893 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 09:55:54,893 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975326466] [2020-12-22 09:55:54,894 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 09:55:54,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:55:54,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 09:55:54,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:55:54,895 INFO L87 Difference]: Start difference. First operand 8490 states and 12202 transitions. Second operand 7 states. [2020-12-22 09:55:56,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:55:56,820 INFO L93 Difference]: Finished difference Result 26566 states and 37632 transitions. [2020-12-22 09:55:56,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 09:55:56,820 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 95 [2020-12-22 09:55:56,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:55:56,879 INFO L225 Difference]: With dead ends: 26566 [2020-12-22 09:55:56,880 INFO L226 Difference]: Without dead ends: 23092 [2020-12-22 09:55:56,896 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-12-22 09:55:56,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23092 states. [2020-12-22 09:55:58,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23092 to 13706. [2020-12-22 09:55:58,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13706 states. [2020-12-22 09:55:58,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13706 states to 13706 states and 19434 transitions. [2020-12-22 09:55:58,416 INFO L78 Accepts]: Start accepts. Automaton has 13706 states and 19434 transitions. Word has length 95 [2020-12-22 09:55:58,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:55:58,417 INFO L481 AbstractCegarLoop]: Abstraction has 13706 states and 19434 transitions. [2020-12-22 09:55:58,417 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 09:55:58,417 INFO L276 IsEmpty]: Start isEmpty. Operand 13706 states and 19434 transitions. [2020-12-22 09:55:58,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-12-22 09:55:58,422 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:55:58,423 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 09:55:58,423 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 09:55:58,423 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:55:58,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:55:58,424 INFO L82 PathProgramCache]: Analyzing trace with hash -1702428119, now seen corresponding path program 1 times [2020-12-22 09:55:58,424 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:55:58,425 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111061976] [2020-12-22 09:55:58,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:55:58,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:55:58,574 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 09:55:58,575 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111061976] [2020-12-22 09:55:58,575 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:55:58,575 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 09:55:58,575 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895931022] [2020-12-22 09:55:58,576 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 09:55:58,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:55:58,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 09:55:58,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:55:58,577 INFO L87 Difference]: Start difference. First operand 13706 states and 19434 transitions. Second operand 7 states. [2020-12-22 09:56:00,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:56:00,883 INFO L93 Difference]: Finished difference Result 30038 states and 42480 transitions. [2020-12-22 09:56:00,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 09:56:00,884 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 95 [2020-12-22 09:56:00,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:56:00,949 INFO L225 Difference]: With dead ends: 30038 [2020-12-22 09:56:00,949 INFO L226 Difference]: Without dead ends: 26564 [2020-12-22 09:56:00,963 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-12-22 09:56:00,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26564 states. [2020-12-22 09:56:02,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26564 to 17178. [2020-12-22 09:56:02,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17178 states. [2020-12-22 09:56:02,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17178 states to 17178 states and 24282 transitions. [2020-12-22 09:56:02,384 INFO L78 Accepts]: Start accepts. Automaton has 17178 states and 24282 transitions. Word has length 95 [2020-12-22 09:56:02,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:56:02,384 INFO L481 AbstractCegarLoop]: Abstraction has 17178 states and 24282 transitions. [2020-12-22 09:56:02,384 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 09:56:02,384 INFO L276 IsEmpty]: Start isEmpty. Operand 17178 states and 24282 transitions. [2020-12-22 09:56:02,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-12-22 09:56:02,389 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:56:02,390 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 09:56:02,390 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 09:56:02,390 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:56:02,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:56:02,391 INFO L82 PathProgramCache]: Analyzing trace with hash 1357080137, now seen corresponding path program 1 times [2020-12-22 09:56:02,391 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:56:02,391 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094525937] [2020-12-22 09:56:02,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:56:02,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:56:02,507 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 09:56:02,507 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094525937] [2020-12-22 09:56:02,508 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:56:02,508 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 09:56:02,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834347252] [2020-12-22 09:56:02,510 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 09:56:02,510 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:56:02,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 09:56:02,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:56:02,511 INFO L87 Difference]: Start difference. First operand 17178 states and 24282 transitions. Second operand 7 states. [2020-12-22 09:56:04,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:56:04,437 INFO L93 Difference]: Finished difference Result 33510 states and 47328 transitions. [2020-12-22 09:56:04,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 09:56:04,438 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 95 [2020-12-22 09:56:04,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:56:04,517 INFO L225 Difference]: With dead ends: 33510 [2020-12-22 09:56:04,517 INFO L226 Difference]: Without dead ends: 30036 [2020-12-22 09:56:04,531 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-12-22 09:56:04,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30036 states. [2020-12-22 09:56:06,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30036 to 20650. [2020-12-22 09:56:06,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20650 states. [2020-12-22 09:56:06,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20650 states to 20650 states and 29130 transitions. [2020-12-22 09:56:06,126 INFO L78 Accepts]: Start accepts. Automaton has 20650 states and 29130 transitions. Word has length 95 [2020-12-22 09:56:06,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:56:06,127 INFO L481 AbstractCegarLoop]: Abstraction has 20650 states and 29130 transitions. [2020-12-22 09:56:06,127 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 09:56:06,127 INFO L276 IsEmpty]: Start isEmpty. Operand 20650 states and 29130 transitions. [2020-12-22 09:56:06,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-12-22 09:56:06,135 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:56:06,135 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 09:56:06,135 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 09:56:06,136 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:56:06,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:56:06,136 INFO L82 PathProgramCache]: Analyzing trace with hash -63915415, now seen corresponding path program 1 times [2020-12-22 09:56:06,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:56:06,137 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200142194] [2020-12-22 09:56:06,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:56:06,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:56:06,271 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 09:56:06,271 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200142194] [2020-12-22 09:56:06,271 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:56:06,271 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 09:56:06,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154079714] [2020-12-22 09:56:06,272 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 09:56:06,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:56:06,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 09:56:06,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:56:06,273 INFO L87 Difference]: Start difference. First operand 20650 states and 29130 transitions. Second operand 7 states. [2020-12-22 09:56:08,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:56:08,280 INFO L93 Difference]: Finished difference Result 34902 states and 49296 transitions. [2020-12-22 09:56:08,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 09:56:08,281 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 95 [2020-12-22 09:56:08,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:56:08,348 INFO L225 Difference]: With dead ends: 34902 [2020-12-22 09:56:08,348 INFO L226 Difference]: Without dead ends: 32468 [2020-12-22 09:56:08,363 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-12-22 09:56:08,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32468 states. [2020-12-22 09:56:10,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32468 to 23082. [2020-12-22 09:56:10,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23082 states. [2020-12-22 09:56:10,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23082 states to 23082 states and 32554 transitions. [2020-12-22 09:56:10,245 INFO L78 Accepts]: Start accepts. Automaton has 23082 states and 32554 transitions. Word has length 95 [2020-12-22 09:56:10,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:56:10,245 INFO L481 AbstractCegarLoop]: Abstraction has 23082 states and 32554 transitions. [2020-12-22 09:56:10,245 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 09:56:10,245 INFO L276 IsEmpty]: Start isEmpty. Operand 23082 states and 32554 transitions. [2020-12-22 09:56:10,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-12-22 09:56:10,252 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:56:10,252 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] [2020-12-22 09:56:10,253 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 09:56:10,253 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:56:10,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:56:10,253 INFO L82 PathProgramCache]: Analyzing trace with hash -1416628636, now seen corresponding path program 1 times [2020-12-22 09:56:10,254 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:56:10,254 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124091591] [2020-12-22 09:56:10,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:56:10,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:56:10,603 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:56:10,603 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124091591] [2020-12-22 09:56:10,603 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1599682803] [2020-12-22 09:56:10,603 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 09:56:10,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:56:10,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 451 conjuncts, 25 conjunts are in the unsatisfiable core [2020-12-22 09:56:10,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:56:11,195 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 09:56:11,195 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:56:11,196 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 21 [2020-12-22 09:56:11,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871927232] [2020-12-22 09:56:11,197 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-22 09:56:11,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:56:11,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-22 09:56:11,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2020-12-22 09:56:11,198 INFO L87 Difference]: Start difference. First operand 23082 states and 32554 transitions. Second operand 21 states. [2020-12-22 09:56:13,602 WARN L197 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2020-12-22 09:56:26,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:56:26,432 INFO L93 Difference]: Finished difference Result 139883 states and 194035 transitions. [2020-12-22 09:56:26,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2020-12-22 09:56:26,433 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 96 [2020-12-22 09:56:26,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:56:26,694 INFO L225 Difference]: With dead ends: 139883 [2020-12-22 09:56:26,694 INFO L226 Difference]: Without dead ends: 118345 [2020-12-22 09:56:26,755 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4681 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=2354, Invalid=10078, Unknown=0, NotChecked=0, Total=12432 [2020-12-22 09:56:26,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118345 states. [2020-12-22 09:56:33,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118345 to 73762. [2020-12-22 09:56:33,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73762 states. [2020-12-22 09:56:33,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73762 states to 73762 states and 101962 transitions. [2020-12-22 09:56:33,149 INFO L78 Accepts]: Start accepts. Automaton has 73762 states and 101962 transitions. Word has length 96 [2020-12-22 09:56:33,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:56:33,149 INFO L481 AbstractCegarLoop]: Abstraction has 73762 states and 101962 transitions. [2020-12-22 09:56:33,150 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-22 09:56:33,150 INFO L276 IsEmpty]: Start isEmpty. Operand 73762 states and 101962 transitions. [2020-12-22 09:56:33,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-12-22 09:56:33,158 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:56:33,159 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] [2020-12-22 09:56:33,373 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:56:33,374 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:56:33,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:56:33,375 INFO L82 PathProgramCache]: Analyzing trace with hash -1879245087, now seen corresponding path program 1 times [2020-12-22 09:56:33,376 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:56:33,376 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403474527] [2020-12-22 09:56:33,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:56:33,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:56:33,866 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 09:56:33,866 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403474527] [2020-12-22 09:56:33,871 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491108287] [2020-12-22 09:56:33,872 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 09:56:34,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:56:34,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 454 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-22 09:56:34,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:56:34,292 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 09:56:34,687 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 09:56:34,687 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:56:34,688 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2020-12-22 09:56:34,688 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382619873] [2020-12-22 09:56:34,688 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 09:56:34,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:56:34,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 09:56:34,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2020-12-22 09:56:34,690 INFO L87 Difference]: Start difference. First operand 73762 states and 101962 transitions. Second operand 17 states. [2020-12-22 09:56:35,578 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 39 [2020-12-22 09:56:38,946 WARN L197 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 50 [2020-12-22 09:56:39,107 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 42 [2020-12-22 09:56:39,320 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 39 [2020-12-22 09:56:39,558 WARN L197 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 47 [2020-12-22 09:56:39,805 WARN L197 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 42 [2020-12-22 09:56:40,480 WARN L197 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 50 [2020-12-22 09:56:40,833 WARN L197 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 42 [2020-12-22 09:56:41,131 WARN L197 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 39 [2020-12-22 09:56:41,455 WARN L197 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 47 [2020-12-22 09:56:42,228 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 39 [2020-12-22 09:56:42,571 WARN L197 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 42 [2020-12-22 09:56:43,615 WARN L197 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 42 [2020-12-22 09:58:03,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:58:03,243 INFO L93 Difference]: Finished difference Result 949968 states and 1294037 transitions. [2020-12-22 09:58:03,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2020-12-22 09:58:03,244 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 97 [2020-12-22 09:58:03,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:58:05,332 INFO L225 Difference]: With dead ends: 949968 [2020-12-22 09:58:05,333 INFO L226 Difference]: Without dead ends: 877750 [2020-12-22 09:58:05,684 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 89 SyntacticMatches, 1 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6261 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=2263, Invalid=14249, Unknown=0, NotChecked=0, Total=16512 [2020-12-22 09:58:06,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 877750 states. [2020-12-22 09:58:43,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 877750 to 336518. [2020-12-22 09:58:43,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 336518 states. [2020-12-22 09:58:44,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336518 states to 336518 states and 459026 transitions. [2020-12-22 09:58:44,353 INFO L78 Accepts]: Start accepts. Automaton has 336518 states and 459026 transitions. Word has length 97 [2020-12-22 09:58:44,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:58:44,354 INFO L481 AbstractCegarLoop]: Abstraction has 336518 states and 459026 transitions. [2020-12-22 09:58:44,354 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 09:58:44,354 INFO L276 IsEmpty]: Start isEmpty. Operand 336518 states and 459026 transitions. [2020-12-22 09:58:44,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-12-22 09:58:44,381 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:58:44,382 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:58:44,582 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:58:44,583 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:58:44,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:58:44,584 INFO L82 PathProgramCache]: Analyzing trace with hash -135405655, now seen corresponding path program 1 times [2020-12-22 09:58:44,584 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:58:44,584 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663100758] [2020-12-22 09:58:44,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:58:44,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:58:44,698 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:58:44,698 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663100758] [2020-12-22 09:58:44,699 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:58:44,699 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:58:44,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692450864] [2020-12-22 09:58:44,699 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:58:44,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:58:44,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:58:44,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:58:44,701 INFO L87 Difference]: Start difference. First operand 336518 states and 459026 transitions. Second operand 3 states.