/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/seq-pthread/cs_peterson.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 09:15:04,897 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 09:15:04,902 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 09:15:04,962 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 09:15:04,963 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 09:15:04,969 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 09:15:04,973 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 09:15:04,983 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 09:15:05,004 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 09:15:05,012 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 09:15:05,014 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 09:15:05,015 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 09:15:05,016 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 09:15:05,019 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 09:15:05,022 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 09:15:05,024 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 09:15:05,026 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 09:15:05,030 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 09:15:05,039 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 09:15:05,046 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 09:15:05,051 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 09:15:05,053 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 09:15:05,054 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 09:15:05,056 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 09:15:05,064 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 09:15:05,070 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 09:15:05,071 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 09:15:05,074 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 09:15:05,075 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 09:15:05,076 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 09:15:05,076 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 09:15:05,077 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 09:15:05,077 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 09:15:05,077 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 09:15:05,079 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 09:15:05,079 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 09:15:05,085 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 09:15:05,137 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 09:15:05,137 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 09:15:05,142 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 09:15:05,142 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 09:15:05,143 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 09:15:05,143 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 09:15:05,143 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 09:15:05,144 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 09:15:05,144 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 09:15:05,144 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 09:15:05,145 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 09:15:05,146 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 09:15:05,146 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 09:15:05,146 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 09:15:05,146 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 09:15:05,147 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 09:15:05,147 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 09:15:05,147 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 09:15:05,147 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 09:15:05,148 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 09:15:05,148 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 09:15:05,148 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 09:15:05,148 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 09:15:05,148 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 09:15:05,149 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 09:15:05,149 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 09:15:05,565 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 09:15:05,597 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 09:15:05,601 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 09:15:05,602 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 09:15:05,603 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 09:15:05,604 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-pthread/cs_peterson.i [2020-12-22 09:15:05,691 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ea8aed007/990f2dc750534311b8a192b6694c63eb/FLAG6d18a498f [2020-12-22 09:15:06,472 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 09:15:06,472 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-pthread/cs_peterson.i [2020-12-22 09:15:06,501 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ea8aed007/990f2dc750534311b8a192b6694c63eb/FLAG6d18a498f [2020-12-22 09:15:06,677 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ea8aed007/990f2dc750534311b8a192b6694c63eb [2020-12-22 09:15:06,681 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 09:15:06,683 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 09:15:06,686 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 09:15:06,686 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 09:15:06,690 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 09:15:06,692 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 09:15:06" (1/1) ... [2020-12-22 09:15:06,694 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@15db191 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:15:06, skipping insertion in model container [2020-12-22 09:15:06,695 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 09:15:06" (1/1) ... [2020-12-22 09:15:06,704 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 09:15:06,788 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 09:15:07,150 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-pthread/cs_peterson.i[23605,23618] [2020-12-22 09:15:07,339 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 09:15:07,354 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 09:15:07,384 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-pthread/cs_peterson.i[23605,23618] [2020-12-22 09:15:07,483 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 09:15:07,635 INFO L208 MainTranslator]: Completed translation [2020-12-22 09:15:07,636 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:15:07 WrapperNode [2020-12-22 09:15:07,636 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 09:15:07,637 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 09:15:07,637 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 09:15:07,638 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 09:15:07,645 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:15:07" (1/1) ... [2020-12-22 09:15:07,673 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:15:07" (1/1) ... [2020-12-22 09:15:07,768 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 09:15:07,769 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 09:15:07,769 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 09:15:07,769 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 09:15:07,781 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:15:07" (1/1) ... [2020-12-22 09:15:07,782 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:15:07" (1/1) ... [2020-12-22 09:15:07,812 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:15:07" (1/1) ... [2020-12-22 09:15:07,812 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:15:07" (1/1) ... [2020-12-22 09:15:07,898 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:15:07" (1/1) ... [2020-12-22 09:15:07,923 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:15:07" (1/1) ... [2020-12-22 09:15:07,931 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:15:07" (1/1) ... [2020-12-22 09:15:07,943 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 09:15:07,945 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 09:15:07,946 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 09:15:07,946 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 09:15:07,947 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:15:07" (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 09:15:08,065 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-22 09:15:08,066 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-22 09:15:08,066 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-12-22 09:15:08,066 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 09:15:08,066 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-12-22 09:15:08,067 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-22 09:15:08,067 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2020-12-22 09:15:08,068 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 09:15:08,068 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 09:15:08,069 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 09:15:12,151 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 09:15:12,152 INFO L299 CfgBuilder]: Removed 156 assume(true) statements. [2020-12-22 09:15:12,155 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 09:15:12 BoogieIcfgContainer [2020-12-22 09:15:12,155 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 09:15:12,158 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 09:15:12,158 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 09:15:12,162 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 09:15:12,162 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 09:15:06" (1/3) ... [2020-12-22 09:15:12,163 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@576bc8e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 09:15:12, skipping insertion in model container [2020-12-22 09:15:12,163 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:15:07" (2/3) ... [2020-12-22 09:15:12,164 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@576bc8e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 09:15:12, skipping insertion in model container [2020-12-22 09:15:12,164 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 09:15:12" (3/3) ... [2020-12-22 09:15:12,167 INFO L111 eAbstractionObserver]: Analyzing ICFG cs_peterson.i [2020-12-22 09:15:12,174 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 09:15:12,180 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 09:15:12,206 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 09:15:12,261 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 09:15:12,261 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 09:15:12,262 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 09:15:12,262 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 09:15:12,262 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 09:15:12,262 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 09:15:12,262 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 09:15:12,262 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 09:15:12,300 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states. [2020-12-22 09:15:12,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-12-22 09:15:12,332 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:15:12,334 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] [2020-12-22 09:15:12,334 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:15:12,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:15:12,344 INFO L82 PathProgramCache]: Analyzing trace with hash -1554265941, now seen corresponding path program 1 times [2020-12-22 09:15:12,356 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:15:12,357 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968072646] [2020-12-22 09:15:12,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:15:12,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:15:12,883 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 09:15:12,883 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968072646] [2020-12-22 09:15:12,884 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:15:12,885 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:15:12,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250204232] [2020-12-22 09:15:12,890 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:15:12,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:15:12,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:15:12,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:15:12,907 INFO L87 Difference]: Start difference. First operand 198 states. Second operand 3 states. [2020-12-22 09:15:13,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:15:13,022 INFO L93 Difference]: Finished difference Result 398 states and 624 transitions. [2020-12-22 09:15:13,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:15:13,025 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 52 [2020-12-22 09:15:13,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:15:13,046 INFO L225 Difference]: With dead ends: 398 [2020-12-22 09:15:13,047 INFO L226 Difference]: Without dead ends: 198 [2020-12-22 09:15:13,052 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 09:15:13,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2020-12-22 09:15:13,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 195. [2020-12-22 09:15:13,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2020-12-22 09:15:13,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 262 transitions. [2020-12-22 09:15:13,124 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 262 transitions. Word has length 52 [2020-12-22 09:15:13,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:15:13,125 INFO L481 AbstractCegarLoop]: Abstraction has 195 states and 262 transitions. [2020-12-22 09:15:13,125 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:15:13,125 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 262 transitions. [2020-12-22 09:15:13,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-12-22 09:15:13,129 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:15:13,129 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] [2020-12-22 09:15:13,129 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 09:15:13,143 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:15:13,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:15:13,145 INFO L82 PathProgramCache]: Analyzing trace with hash 808187315, now seen corresponding path program 1 times [2020-12-22 09:15:13,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:15:13,145 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283264110] [2020-12-22 09:15:13,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:15:13,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:15:13,284 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:15:13,285 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283264110] [2020-12-22 09:15:13,285 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:15:13,285 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:15:13,286 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630879843] [2020-12-22 09:15:13,289 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:15:13,289 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:15:13,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:15:13,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:15:13,291 INFO L87 Difference]: Start difference. First operand 195 states and 262 transitions. Second operand 3 states. [2020-12-22 09:15:13,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:15:13,342 INFO L93 Difference]: Finished difference Result 389 states and 524 transitions. [2020-12-22 09:15:13,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:15:13,343 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 55 [2020-12-22 09:15:13,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:15:13,345 INFO L225 Difference]: With dead ends: 389 [2020-12-22 09:15:13,345 INFO L226 Difference]: Without dead ends: 197 [2020-12-22 09:15:13,347 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 09:15:13,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2020-12-22 09:15:13,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 196. [2020-12-22 09:15:13,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2020-12-22 09:15:13,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 263 transitions. [2020-12-22 09:15:13,367 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 263 transitions. Word has length 55 [2020-12-22 09:15:13,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:15:13,367 INFO L481 AbstractCegarLoop]: Abstraction has 196 states and 263 transitions. [2020-12-22 09:15:13,368 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:15:13,368 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 263 transitions. [2020-12-22 09:15:13,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-12-22 09:15:13,371 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:15:13,371 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] [2020-12-22 09:15:13,371 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 09:15:13,371 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:15:13,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:15:13,372 INFO L82 PathProgramCache]: Analyzing trace with hash -2120381131, now seen corresponding path program 1 times [2020-12-22 09:15:13,372 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:15:13,373 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062581431] [2020-12-22 09:15:13,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:15:13,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:15:13,461 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:15:13,461 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062581431] [2020-12-22 09:15:13,461 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [989719244] [2020-12-22 09:15:13,462 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 09:15:13,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:15:13,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 528 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-22 09:15:13,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:15:13,802 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:15:13,802 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:15:13,803 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-12-22 09:15:13,803 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586472503] [2020-12-22 09:15:13,804 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:15:13,804 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:15:13,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:15:13,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:15:13,805 INFO L87 Difference]: Start difference. First operand 196 states and 263 transitions. Second operand 5 states. [2020-12-22 09:15:13,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:15:13,851 INFO L93 Difference]: Finished difference Result 392 states and 527 transitions. [2020-12-22 09:15:13,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 09:15:13,852 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 57 [2020-12-22 09:15:13,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:15:13,854 INFO L225 Difference]: With dead ends: 392 [2020-12-22 09:15:13,854 INFO L226 Difference]: Without dead ends: 199 [2020-12-22 09:15:13,856 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:15:13,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2020-12-22 09:15:13,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 198. [2020-12-22 09:15:13,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2020-12-22 09:15:13,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 265 transitions. [2020-12-22 09:15:13,878 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 265 transitions. Word has length 57 [2020-12-22 09:15:13,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:15:13,878 INFO L481 AbstractCegarLoop]: Abstraction has 198 states and 265 transitions. [2020-12-22 09:15:13,879 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:15:13,879 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 265 transitions. [2020-12-22 09:15:13,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-12-22 09:15:13,885 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:15:13,886 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:15:14,102 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-12-22 09:15:14,103 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:15:14,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:15:14,104 INFO L82 PathProgramCache]: Analyzing trace with hash 1023888439, now seen corresponding path program 2 times [2020-12-22 09:15:14,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:15:14,106 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707258281] [2020-12-22 09:15:14,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:15:14,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:15:14,318 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 09:15:14,318 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707258281] [2020-12-22 09:15:14,319 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [399298836] [2020-12-22 09:15:14,319 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 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 09:15:14,725 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-12-22 09:15:14,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 09:15:14,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 497 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 09:15:14,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:15:14,844 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-22 09:15:14,845 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 09:15:14,845 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 7 [2020-12-22 09:15:14,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262869546] [2020-12-22 09:15:14,846 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:15:14,846 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:15:14,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:15:14,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:15:14,847 INFO L87 Difference]: Start difference. First operand 198 states and 265 transitions. Second operand 5 states. [2020-12-22 09:15:15,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:15:15,294 INFO L93 Difference]: Finished difference Result 364 states and 485 transitions. [2020-12-22 09:15:15,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 09:15:15,294 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 59 [2020-12-22 09:15:15,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:15:15,298 INFO L225 Difference]: With dead ends: 364 [2020-12-22 09:15:15,298 INFO L226 Difference]: Without dead ends: 308 [2020-12-22 09:15:15,300 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-12-22 09:15:15,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2020-12-22 09:15:15,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 304. [2020-12-22 09:15:15,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 304 states. [2020-12-22 09:15:15,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 414 transitions. [2020-12-22 09:15:15,317 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 414 transitions. Word has length 59 [2020-12-22 09:15:15,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:15:15,317 INFO L481 AbstractCegarLoop]: Abstraction has 304 states and 414 transitions. [2020-12-22 09:15:15,317 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:15:15,317 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 414 transitions. [2020-12-22 09:15:15,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-12-22 09:15:15,320 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:15:15,320 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:15:15,534 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:15:15,535 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:15:15,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:15:15,536 INFO L82 PathProgramCache]: Analyzing trace with hash -1888623339, now seen corresponding path program 1 times [2020-12-22 09:15:15,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:15:15,537 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592506558] [2020-12-22 09:15:15,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:15:15,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:15:15,695 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 09:15:15,695 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592506558] [2020-12-22 09:15:15,696 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [335873851] [2020-12-22 09:15:15,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:15:15,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:15:15,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 773 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-22 09:15:15,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:15:16,009 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-22 09:15:16,010 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 09:15:16,010 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2020-12-22 09:15:16,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093527886] [2020-12-22 09:15:16,011 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:15:16,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:15:16,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:15:16,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:15:16,014 INFO L87 Difference]: Start difference. First operand 304 states and 414 transitions. Second operand 3 states. [2020-12-22 09:15:18,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:15:18,213 INFO L93 Difference]: Finished difference Result 869 states and 1184 transitions. [2020-12-22 09:15:18,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:15:18,214 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 88 [2020-12-22 09:15:18,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:15:18,217 INFO L225 Difference]: With dead ends: 869 [2020-12-22 09:15:18,217 INFO L226 Difference]: Without dead ends: 590 [2020-12-22 09:15:18,219 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:15:18,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 590 states. [2020-12-22 09:15:18,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 590 to 491. [2020-12-22 09:15:18,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 491 states. [2020-12-22 09:15:18,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 491 states to 491 states and 674 transitions. [2020-12-22 09:15:18,241 INFO L78 Accepts]: Start accepts. Automaton has 491 states and 674 transitions. Word has length 88 [2020-12-22 09:15:18,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:15:18,242 INFO L481 AbstractCegarLoop]: Abstraction has 491 states and 674 transitions. [2020-12-22 09:15:18,242 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:15:18,242 INFO L276 IsEmpty]: Start isEmpty. Operand 491 states and 674 transitions. [2020-12-22 09:15:18,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-12-22 09:15:18,244 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:15:18,244 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:15:18,459 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:15:18,460 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:15:18,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:15:18,461 INFO L82 PathProgramCache]: Analyzing trace with hash -2090447273, now seen corresponding path program 1 times [2020-12-22 09:15:18,462 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:15:18,462 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974366090] [2020-12-22 09:15:18,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:15:18,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:15:18,591 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 09:15:18,592 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974366090] [2020-12-22 09:15:18,593 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2042724289] [2020-12-22 09:15:18,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:15:18,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:15:18,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 764 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-22 09:15:18,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:15:18,922 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:15:18,923 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:15:18,924 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 7 [2020-12-22 09:15:18,924 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609887044] [2020-12-22 09:15:18,925 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 09:15:18,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:15:18,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 09:15:18,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:15:18,933 INFO L87 Difference]: Start difference. First operand 491 states and 674 transitions. Second operand 7 states. [2020-12-22 09:15:19,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:15:19,131 INFO L93 Difference]: Finished difference Result 998 states and 1370 transitions. [2020-12-22 09:15:19,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-22 09:15:19,132 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 88 [2020-12-22 09:15:19,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:15:19,136 INFO L225 Difference]: With dead ends: 998 [2020-12-22 09:15:19,136 INFO L226 Difference]: Without dead ends: 510 [2020-12-22 09:15:19,138 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2020-12-22 09:15:19,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 510 states. [2020-12-22 09:15:19,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 510 to 502. [2020-12-22 09:15:19,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 502 states. [2020-12-22 09:15:19,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 502 states to 502 states and 686 transitions. [2020-12-22 09:15:19,156 INFO L78 Accepts]: Start accepts. Automaton has 502 states and 686 transitions. Word has length 88 [2020-12-22 09:15:19,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:15:19,157 INFO L481 AbstractCegarLoop]: Abstraction has 502 states and 686 transitions. [2020-12-22 09:15:19,157 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 09:15:19,157 INFO L276 IsEmpty]: Start isEmpty. Operand 502 states and 686 transitions. [2020-12-22 09:15:19,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-12-22 09:15:19,163 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:15:19,163 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:15:19,377 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:15:19,378 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:15:19,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:15:19,379 INFO L82 PathProgramCache]: Analyzing trace with hash 1980979399, now seen corresponding path program 2 times [2020-12-22 09:15:19,380 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:15:19,380 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352052348] [2020-12-22 09:15:19,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:15:19,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:15:19,659 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-12-22 09:15:19,660 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352052348] [2020-12-22 09:15:19,660 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [168239167] [2020-12-22 09:15:19,660 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:15:19,908 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-12-22 09:15:19,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 09:15:19,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 725 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-22 09:15:19,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:15:20,014 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2020-12-22 09:15:20,014 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 09:15:20,015 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2020-12-22 09:15:20,015 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919472253] [2020-12-22 09:15:20,015 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:15:20,016 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:15:20,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:15:20,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:15:20,017 INFO L87 Difference]: Start difference. First operand 502 states and 686 transitions. Second operand 3 states. [2020-12-22 09:15:20,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:15:20,037 INFO L93 Difference]: Finished difference Result 791 states and 1072 transitions. [2020-12-22 09:15:20,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:15:20,037 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 99 [2020-12-22 09:15:20,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:15:20,040 INFO L225 Difference]: With dead ends: 791 [2020-12-22 09:15:20,041 INFO L226 Difference]: Without dead ends: 502 [2020-12-22 09:15:20,042 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:15:20,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 502 states. [2020-12-22 09:15:20,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 502 to 502. [2020-12-22 09:15:20,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 502 states. [2020-12-22 09:15:20,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 502 states to 502 states and 685 transitions. [2020-12-22 09:15:20,058 INFO L78 Accepts]: Start accepts. Automaton has 502 states and 685 transitions. Word has length 99 [2020-12-22 09:15:20,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:15:20,058 INFO L481 AbstractCegarLoop]: Abstraction has 502 states and 685 transitions. [2020-12-22 09:15:20,058 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:15:20,059 INFO L276 IsEmpty]: Start isEmpty. Operand 502 states and 685 transitions. [2020-12-22 09:15:20,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-12-22 09:15:20,060 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:15:20,061 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:15:20,275 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-12-22 09:15:20,275 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:15:20,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:15:20,276 INFO L82 PathProgramCache]: Analyzing trace with hash 468581709, now seen corresponding path program 1 times [2020-12-22 09:15:20,276 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:15:20,277 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483292099] [2020-12-22 09:15:20,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:15:20,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:15:20,526 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-12-22 09:15:20,526 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483292099] [2020-12-22 09:15:20,527 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2142719210] [2020-12-22 09:15:20,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:15:20,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:15:20,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 819 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-22 09:15:20,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:15:20,855 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-12-22 09:15:20,855 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:15:20,856 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-12-22 09:15:20,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325183365] [2020-12-22 09:15:20,858 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:15:20,858 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:15:20,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:15:20,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:15:20,860 INFO L87 Difference]: Start difference. First operand 502 states and 685 transitions. Second operand 6 states. [2020-12-22 09:15:20,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:15:20,961 INFO L93 Difference]: Finished difference Result 992 states and 1357 transitions. [2020-12-22 09:15:20,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 09:15:20,961 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 99 [2020-12-22 09:15:20,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:15:20,965 INFO L225 Difference]: With dead ends: 992 [2020-12-22 09:15:20,965 INFO L226 Difference]: Without dead ends: 511 [2020-12-22 09:15:20,966 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:15:20,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 511 states. [2020-12-22 09:15:20,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 511 to 511. [2020-12-22 09:15:20,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 511 states. [2020-12-22 09:15:20,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 511 states to 511 states and 695 transitions. [2020-12-22 09:15:20,983 INFO L78 Accepts]: Start accepts. Automaton has 511 states and 695 transitions. Word has length 99 [2020-12-22 09:15:20,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:15:20,983 INFO L481 AbstractCegarLoop]: Abstraction has 511 states and 695 transitions. [2020-12-22 09:15:20,983 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:15:20,984 INFO L276 IsEmpty]: Start isEmpty. Operand 511 states and 695 transitions. [2020-12-22 09:15:20,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-12-22 09:15:20,986 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:15:20,986 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:15:21,199 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:15:21,200 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:15:21,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:15:21,201 INFO L82 PathProgramCache]: Analyzing trace with hash -1565615141, now seen corresponding path program 2 times [2020-12-22 09:15:21,202 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:15:21,202 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661968581] [2020-12-22 09:15:21,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:15:21,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:15:21,458 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2020-12-22 09:15:21,459 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661968581] [2020-12-22 09:15:21,459 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:15:21,459 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:15:21,459 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023117716] [2020-12-22 09:15:21,460 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:15:21,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:15:21,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:15:21,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:15:21,463 INFO L87 Difference]: Start difference. First operand 511 states and 695 transitions. Second operand 3 states. [2020-12-22 09:15:21,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:15:21,613 INFO L93 Difference]: Finished difference Result 812 states and 1097 transitions. [2020-12-22 09:15:21,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:15:21,614 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 108 [2020-12-22 09:15:21,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:15:21,617 INFO L225 Difference]: With dead ends: 812 [2020-12-22 09:15:21,617 INFO L226 Difference]: Without dead ends: 526 [2020-12-22 09:15:21,618 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 1 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 09:15:21,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 526 states. [2020-12-22 09:15:21,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 526 to 526. [2020-12-22 09:15:21,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 526 states. [2020-12-22 09:15:21,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 526 states to 526 states and 713 transitions. [2020-12-22 09:15:21,635 INFO L78 Accepts]: Start accepts. Automaton has 526 states and 713 transitions. Word has length 108 [2020-12-22 09:15:21,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:15:21,636 INFO L481 AbstractCegarLoop]: Abstraction has 526 states and 713 transitions. [2020-12-22 09:15:21,636 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:15:21,636 INFO L276 IsEmpty]: Start isEmpty. Operand 526 states and 713 transitions. [2020-12-22 09:15:21,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-12-22 09:15:21,638 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:15:21,638 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:15:21,638 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 09:15:21,638 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:15:21,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:15:21,639 INFO L82 PathProgramCache]: Analyzing trace with hash 1762001501, now seen corresponding path program 1 times [2020-12-22 09:15:21,639 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:15:21,639 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794549177] [2020-12-22 09:15:21,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:15:21,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:15:21,849 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2020-12-22 09:15:21,850 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794549177] [2020-12-22 09:15:21,850 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:15:21,850 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 09:15:21,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691174330] [2020-12-22 09:15:21,851 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 09:15:21,851 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:15:21,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 09:15:21,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 09:15:21,852 INFO L87 Difference]: Start difference. First operand 526 states and 713 transitions. Second operand 4 states. [2020-12-22 09:15:22,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:15:22,135 INFO L93 Difference]: Finished difference Result 771 states and 1034 transitions. [2020-12-22 09:15:22,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 09:15:22,136 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 108 [2020-12-22 09:15:22,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:15:22,139 INFO L225 Difference]: With dead ends: 771 [2020-12-22 09:15:22,139 INFO L226 Difference]: Without dead ends: 492 [2020-12-22 09:15:22,140 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 09:15:22,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 492 states. [2020-12-22 09:15:22,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 492 to 492. [2020-12-22 09:15:22,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 492 states. [2020-12-22 09:15:22,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 492 states to 492 states and 657 transitions. [2020-12-22 09:15:22,157 INFO L78 Accepts]: Start accepts. Automaton has 492 states and 657 transitions. Word has length 108 [2020-12-22 09:15:22,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:15:22,157 INFO L481 AbstractCegarLoop]: Abstraction has 492 states and 657 transitions. [2020-12-22 09:15:22,158 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 09:15:22,158 INFO L276 IsEmpty]: Start isEmpty. Operand 492 states and 657 transitions. [2020-12-22 09:15:22,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-12-22 09:15:22,160 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:15:22,160 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:15:22,160 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 09:15:22,160 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:15:22,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:15:22,161 INFO L82 PathProgramCache]: Analyzing trace with hash 1707608603, now seen corresponding path program 1 times [2020-12-22 09:15:22,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:15:22,161 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185515132] [2020-12-22 09:15:22,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:15:23,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:15:24,142 WARN L197 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 43 [2020-12-22 09:15:24,408 WARN L197 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 53 [2020-12-22 09:15:24,668 WARN L197 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 57 [2020-12-22 09:15:24,844 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2020-12-22 09:15:24,845 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185515132] [2020-12-22 09:15:24,845 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:15:24,845 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-12-22 09:15:24,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128983631] [2020-12-22 09:15:24,846 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-22 09:15:24,846 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:15:24,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-22 09:15:24,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-12-22 09:15:24,847 INFO L87 Difference]: Start difference. First operand 492 states and 657 transitions. Second operand 11 states. [2020-12-22 09:15:27,335 WARN L197 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 44 [2020-12-22 09:15:27,599 WARN L197 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 56 [2020-12-22 09:15:27,989 WARN L197 SmtUtils]: Spent 297.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 59 [2020-12-22 09:15:30,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:15:30,759 INFO L93 Difference]: Finished difference Result 1058 states and 1412 transitions. [2020-12-22 09:15:30,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-22 09:15:30,759 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 108 [2020-12-22 09:15:30,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:15:30,764 INFO L225 Difference]: With dead ends: 1058 [2020-12-22 09:15:30,764 INFO L226 Difference]: Without dead ends: 842 [2020-12-22 09:15:30,765 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2020-12-22 09:15:30,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 842 states. [2020-12-22 09:15:30,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 842 to 522. [2020-12-22 09:15:30,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 522 states. [2020-12-22 09:15:30,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 522 states to 522 states and 694 transitions. [2020-12-22 09:15:30,792 INFO L78 Accepts]: Start accepts. Automaton has 522 states and 694 transitions. Word has length 108 [2020-12-22 09:15:30,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:15:30,793 INFO L481 AbstractCegarLoop]: Abstraction has 522 states and 694 transitions. [2020-12-22 09:15:30,793 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-22 09:15:30,793 INFO L276 IsEmpty]: Start isEmpty. Operand 522 states and 694 transitions. [2020-12-22 09:15:30,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-12-22 09:15:30,795 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:15:30,795 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:15:30,795 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 09:15:30,796 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:15:30,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:15:30,796 INFO L82 PathProgramCache]: Analyzing trace with hash 491454877, now seen corresponding path program 1 times [2020-12-22 09:15:30,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:15:30,797 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922720534] [2020-12-22 09:15:30,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:15:34,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:15:34,801 WARN L197 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 57 [2020-12-22 09:15:34,968 WARN L197 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 60 [2020-12-22 09:15:35,141 WARN L197 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 63 [2020-12-22 09:15:35,267 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 40 [2020-12-22 09:15:35,484 WARN L197 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 41 [2020-12-22 09:15:35,714 WARN L197 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 43 [2020-12-22 09:15:35,947 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2020-12-22 09:15:35,947 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922720534] [2020-12-22 09:15:35,948 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:15:35,948 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-12-22 09:15:35,948 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034476737] [2020-12-22 09:15:35,948 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-22 09:15:35,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:15:35,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-22 09:15:35,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-12-22 09:15:35,949 INFO L87 Difference]: Start difference. First operand 522 states and 694 transitions. Second operand 11 states. [2020-12-22 09:15:38,414 WARN L197 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 65 [2020-12-22 09:15:38,741 WARN L197 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 70 [2020-12-22 09:15:38,960 WARN L197 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 71 [2020-12-22 09:15:39,228 WARN L197 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 74 [2020-12-22 09:15:40,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:15:40,713 INFO L93 Difference]: Finished difference Result 943 states and 1242 transitions. [2020-12-22 09:15:40,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-22 09:15:40,714 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 108 [2020-12-22 09:15:40,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:15:40,717 INFO L225 Difference]: With dead ends: 943 [2020-12-22 09:15:40,718 INFO L226 Difference]: Without dead ends: 727 [2020-12-22 09:15:40,719 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2020-12-22 09:15:40,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 727 states. [2020-12-22 09:15:40,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 727 to 512. [2020-12-22 09:15:40,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 512 states. [2020-12-22 09:15:40,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 512 states to 512 states and 680 transitions. [2020-12-22 09:15:40,749 INFO L78 Accepts]: Start accepts. Automaton has 512 states and 680 transitions. Word has length 108 [2020-12-22 09:15:40,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:15:40,749 INFO L481 AbstractCegarLoop]: Abstraction has 512 states and 680 transitions. [2020-12-22 09:15:40,749 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-22 09:15:40,750 INFO L276 IsEmpty]: Start isEmpty. Operand 512 states and 680 transitions. [2020-12-22 09:15:40,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-12-22 09:15:40,752 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:15:40,752 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:15:40,752 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 09:15:40,753 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:15:40,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:15:40,753 INFO L82 PathProgramCache]: Analyzing trace with hash -979453187, now seen corresponding path program 1 times [2020-12-22 09:15:40,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:15:40,753 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430081770] [2020-12-22 09:15:40,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:15:40,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:15:40,936 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2020-12-22 09:15:40,937 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430081770] [2020-12-22 09:15:40,937 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:15:40,937 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:15:40,937 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625335017] [2020-12-22 09:15:40,938 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:15:40,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:15:40,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:15:40,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:15:40,939 INFO L87 Difference]: Start difference. First operand 512 states and 680 transitions. Second operand 3 states. [2020-12-22 09:15:41,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:15:41,041 INFO L93 Difference]: Finished difference Result 907 states and 1226 transitions. [2020-12-22 09:15:41,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:15:41,042 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 111 [2020-12-22 09:15:41,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:15:41,046 INFO L225 Difference]: With dead ends: 907 [2020-12-22 09:15:41,046 INFO L226 Difference]: Without dead ends: 526 [2020-12-22 09:15:41,047 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 09:15:41,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 526 states. [2020-12-22 09:15:41,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 526 to 526. [2020-12-22 09:15:41,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 526 states. [2020-12-22 09:15:41,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 526 states to 526 states and 693 transitions. [2020-12-22 09:15:41,075 INFO L78 Accepts]: Start accepts. Automaton has 526 states and 693 transitions. Word has length 111 [2020-12-22 09:15:41,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:15:41,075 INFO L481 AbstractCegarLoop]: Abstraction has 526 states and 693 transitions. [2020-12-22 09:15:41,075 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:15:41,076 INFO L276 IsEmpty]: Start isEmpty. Operand 526 states and 693 transitions. [2020-12-22 09:15:41,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-12-22 09:15:41,077 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:15:41,078 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:15:41,078 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 09:15:41,078 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:15:41,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:15:41,078 INFO L82 PathProgramCache]: Analyzing trace with hash -418753409, now seen corresponding path program 1 times [2020-12-22 09:15:41,079 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:15:41,079 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114658035] [2020-12-22 09:15:41,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:15:44,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:15:44,906 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2020-12-22 09:15:44,906 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114658035] [2020-12-22 09:15:44,906 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:15:44,906 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 09:15:44,907 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811015243] [2020-12-22 09:15:44,907 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:15:44,907 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:15:44,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:15:44,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:15:44,909 INFO L87 Difference]: Start difference. First operand 526 states and 693 transitions. Second operand 5 states. [2020-12-22 09:15:45,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:15:45,621 INFO L93 Difference]: Finished difference Result 1244 states and 1627 transitions. [2020-12-22 09:15:45,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:15:45,622 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 111 [2020-12-22 09:15:45,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:15:45,626 INFO L225 Difference]: With dead ends: 1244 [2020-12-22 09:15:45,626 INFO L226 Difference]: Without dead ends: 756 [2020-12-22 09:15:45,628 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-12-22 09:15:45,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 756 states. [2020-12-22 09:15:45,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 756 to 572. [2020-12-22 09:15:45,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 572 states. [2020-12-22 09:15:45,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 572 states to 572 states and 726 transitions. [2020-12-22 09:15:45,665 INFO L78 Accepts]: Start accepts. Automaton has 572 states and 726 transitions. Word has length 111 [2020-12-22 09:15:45,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:15:45,666 INFO L481 AbstractCegarLoop]: Abstraction has 572 states and 726 transitions. [2020-12-22 09:15:45,666 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:15:45,666 INFO L276 IsEmpty]: Start isEmpty. Operand 572 states and 726 transitions. [2020-12-22 09:15:45,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-12-22 09:15:45,668 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:15:45,668 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:15:45,668 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 09:15:45,668 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:15:45,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:15:45,669 INFO L82 PathProgramCache]: Analyzing trace with hash 1516769983, now seen corresponding path program 1 times [2020-12-22 09:15:45,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:15:45,669 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304893501] [2020-12-22 09:15:45,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:15:49,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:15:49,893 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2020-12-22 09:15:49,893 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304893501] [2020-12-22 09:15:49,893 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:15:49,894 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 09:15:49,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378130662] [2020-12-22 09:15:49,894 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 09:15:49,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:15:49,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 09:15:49,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-12-22 09:15:49,895 INFO L87 Difference]: Start difference. First operand 572 states and 726 transitions. Second operand 9 states. [2020-12-22 09:15:53,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:15:53,238 INFO L93 Difference]: Finished difference Result 794 states and 989 transitions. [2020-12-22 09:15:53,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 09:15:53,238 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 111 [2020-12-22 09:15:53,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:15:53,244 INFO L225 Difference]: With dead ends: 794 [2020-12-22 09:15:53,245 INFO L226 Difference]: Without dead ends: 750 [2020-12-22 09:15:53,250 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-12-22 09:15:53,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 750 states. [2020-12-22 09:15:53,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 750 to 623. [2020-12-22 09:15:53,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 623 states. [2020-12-22 09:15:53,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 623 states to 623 states and 798 transitions. [2020-12-22 09:15:53,282 INFO L78 Accepts]: Start accepts. Automaton has 623 states and 798 transitions. Word has length 111 [2020-12-22 09:15:53,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:15:53,282 INFO L481 AbstractCegarLoop]: Abstraction has 623 states and 798 transitions. [2020-12-22 09:15:53,283 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 09:15:53,283 INFO L276 IsEmpty]: Start isEmpty. Operand 623 states and 798 transitions. [2020-12-22 09:15:53,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-12-22 09:15:53,285 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:15:53,285 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:15:53,285 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 09:15:53,286 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:15:53,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:15:53,286 INFO L82 PathProgramCache]: Analyzing trace with hash -688848288, now seen corresponding path program 1 times [2020-12-22 09:15:53,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:15:53,287 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661238505] [2020-12-22 09:15:53,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:15:56,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:15:57,279 WARN L197 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 53 [2020-12-22 09:15:57,605 WARN L197 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 50 [2020-12-22 09:15:57,740 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 45 [2020-12-22 09:15:57,876 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2020-12-22 09:15:57,877 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661238505] [2020-12-22 09:15:57,877 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:15:57,877 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:15:57,877 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860418442] [2020-12-22 09:15:57,878 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:15:57,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:15:57,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:15:57,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:15:57,879 INFO L87 Difference]: Start difference. First operand 623 states and 798 transitions. Second operand 6 states. [2020-12-22 09:16:00,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:16:00,835 INFO L93 Difference]: Finished difference Result 716 states and 904 transitions. [2020-12-22 09:16:00,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:16:00,835 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 116 [2020-12-22 09:16:00,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:16:00,839 INFO L225 Difference]: With dead ends: 716 [2020-12-22 09:16:00,839 INFO L226 Difference]: Without dead ends: 603 [2020-12-22 09:16:00,840 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-12-22 09:16:00,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 603 states. [2020-12-22 09:16:00,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 603 to 603. [2020-12-22 09:16:00,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 603 states. [2020-12-22 09:16:00,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 603 states to 603 states and 774 transitions. [2020-12-22 09:16:00,870 INFO L78 Accepts]: Start accepts. Automaton has 603 states and 774 transitions. Word has length 116 [2020-12-22 09:16:00,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:16:00,870 INFO L481 AbstractCegarLoop]: Abstraction has 603 states and 774 transitions. [2020-12-22 09:16:00,870 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:16:00,871 INFO L276 IsEmpty]: Start isEmpty. Operand 603 states and 774 transitions. [2020-12-22 09:16:00,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2020-12-22 09:16:00,873 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:16:00,873 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:16:00,873 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 09:16:00,873 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:16:00,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:16:00,874 INFO L82 PathProgramCache]: Analyzing trace with hash -2044639022, now seen corresponding path program 1 times [2020-12-22 09:16:00,874 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:16:00,874 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589262034] [2020-12-22 09:16:00,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:16:05,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:16:06,377 WARN L197 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 52 [2020-12-22 09:16:06,553 WARN L197 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 54 [2020-12-22 09:16:06,731 WARN L197 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 56 [2020-12-22 09:16:06,924 WARN L197 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 59 [2020-12-22 09:16:07,218 WARN L197 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 74 [2020-12-22 09:16:07,479 WARN L197 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 62 [2020-12-22 09:16:07,633 WARN L197 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 50 [2020-12-22 09:16:07,873 WARN L197 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 60 [2020-12-22 09:16:08,065 WARN L197 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 43 [2020-12-22 09:16:08,227 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2020-12-22 09:16:08,228 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589262034] [2020-12-22 09:16:08,228 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:16:08,228 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-12-22 09:16:08,228 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307071521] [2020-12-22 09:16:08,229 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-22 09:16:08,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:16:08,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-22 09:16:08,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-12-22 09:16:08,230 INFO L87 Difference]: Start difference. First operand 603 states and 774 transitions. Second operand 12 states. [2020-12-22 09:16:10,823 WARN L197 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 74 [2020-12-22 09:16:13,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:16:13,273 INFO L93 Difference]: Finished difference Result 1043 states and 1312 transitions. [2020-12-22 09:16:13,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-22 09:16:13,274 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 119 [2020-12-22 09:16:13,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:16:13,279 INFO L225 Difference]: With dead ends: 1043 [2020-12-22 09:16:13,279 INFO L226 Difference]: Without dead ends: 879 [2020-12-22 09:16:13,280 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 1 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2020-12-22 09:16:13,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 879 states. [2020-12-22 09:16:13,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 879 to 603. [2020-12-22 09:16:13,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 603 states. [2020-12-22 09:16:13,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 603 states to 603 states and 771 transitions. [2020-12-22 09:16:13,318 INFO L78 Accepts]: Start accepts. Automaton has 603 states and 771 transitions. Word has length 119 [2020-12-22 09:16:13,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:16:13,318 INFO L481 AbstractCegarLoop]: Abstraction has 603 states and 771 transitions. [2020-12-22 09:16:13,319 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-22 09:16:13,319 INFO L276 IsEmpty]: Start isEmpty. Operand 603 states and 771 transitions. [2020-12-22 09:16:13,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2020-12-22 09:16:13,321 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:16:13,322 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:16:13,322 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 09:16:13,322 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:16:13,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:16:13,323 INFO L82 PathProgramCache]: Analyzing trace with hash 1767028047, now seen corresponding path program 1 times [2020-12-22 09:16:13,323 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:16:13,323 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933858876] [2020-12-22 09:16:13,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:16:13,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:16:13,836 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2020-12-22 09:16:13,836 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933858876] [2020-12-22 09:16:13,836 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:16:13,837 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-12-22 09:16:13,837 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567986436] [2020-12-22 09:16:13,838 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 09:16:13,838 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:16:13,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 09:16:13,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-12-22 09:16:13,842 INFO L87 Difference]: Start difference. First operand 603 states and 771 transitions. Second operand 10 states. [2020-12-22 09:16:25,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:16:25,475 INFO L93 Difference]: Finished difference Result 1084 states and 1366 transitions. [2020-12-22 09:16:25,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 09:16:25,476 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 123 [2020-12-22 09:16:25,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:16:25,481 INFO L225 Difference]: With dead ends: 1084 [2020-12-22 09:16:25,481 INFO L226 Difference]: Without dead ends: 827 [2020-12-22 09:16:25,482 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-12-22 09:16:25,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 827 states. [2020-12-22 09:16:25,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 827 to 631. [2020-12-22 09:16:25,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 631 states. [2020-12-22 09:16:25,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 631 states to 631 states and 803 transitions. [2020-12-22 09:16:25,523 INFO L78 Accepts]: Start accepts. Automaton has 631 states and 803 transitions. Word has length 123 [2020-12-22 09:16:25,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:16:25,523 INFO L481 AbstractCegarLoop]: Abstraction has 631 states and 803 transitions. [2020-12-22 09:16:25,523 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 09:16:25,524 INFO L276 IsEmpty]: Start isEmpty. Operand 631 states and 803 transitions. [2020-12-22 09:16:25,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-12-22 09:16:25,526 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:16:25,526 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:16:25,526 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 09:16:25,526 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:16:25,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:16:25,527 INFO L82 PathProgramCache]: Analyzing trace with hash 53457014, now seen corresponding path program 1 times [2020-12-22 09:16:25,527 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:16:25,527 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263427583] [2020-12-22 09:16:25,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:16:27,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:16:27,846 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 48 [2020-12-22 09:16:27,975 WARN L197 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 51 [2020-12-22 09:16:28,223 WARN L197 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 56 [2020-12-22 09:16:28,370 WARN L197 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 54 [2020-12-22 09:16:28,543 WARN L197 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 59 [2020-12-22 09:16:28,736 WARN L197 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 64 [2020-12-22 09:16:29,001 WARN L197 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 66 [2020-12-22 09:16:29,318 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2020-12-22 09:16:29,319 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263427583] [2020-12-22 09:16:29,319 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:16:29,319 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-12-22 09:16:29,319 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029531372] [2020-12-22 09:16:29,319 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-22 09:16:29,320 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:16:29,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-22 09:16:29,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-12-22 09:16:29,321 INFO L87 Difference]: Start difference. First operand 631 states and 803 transitions. Second operand 12 states. [2020-12-22 09:16:31,664 WARN L197 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 56 [2020-12-22 09:16:31,833 WARN L197 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 61 [2020-12-22 09:16:32,032 WARN L197 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 62 [2020-12-22 09:16:32,300 WARN L197 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 65 [2020-12-22 09:16:34,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:16:34,481 INFO L93 Difference]: Finished difference Result 1019 states and 1271 transitions. [2020-12-22 09:16:34,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-22 09:16:34,482 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 124 [2020-12-22 09:16:34,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:16:34,486 INFO L225 Difference]: With dead ends: 1019 [2020-12-22 09:16:34,486 INFO L226 Difference]: Without dead ends: 882 [2020-12-22 09:16:34,487 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2020-12-22 09:16:34,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 882 states. [2020-12-22 09:16:34,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 882 to 631. [2020-12-22 09:16:34,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 631 states. [2020-12-22 09:16:34,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 631 states to 631 states and 802 transitions. [2020-12-22 09:16:34,534 INFO L78 Accepts]: Start accepts. Automaton has 631 states and 802 transitions. Word has length 124 [2020-12-22 09:16:34,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:16:34,535 INFO L481 AbstractCegarLoop]: Abstraction has 631 states and 802 transitions. [2020-12-22 09:16:34,535 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-22 09:16:34,535 INFO L276 IsEmpty]: Start isEmpty. Operand 631 states and 802 transitions. [2020-12-22 09:16:34,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-12-22 09:16:34,538 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:16:34,538 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:16:34,538 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 09:16:34,538 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:16:34,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:16:34,539 INFO L82 PathProgramCache]: Analyzing trace with hash 1148397414, now seen corresponding path program 1 times [2020-12-22 09:16:34,539 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:16:34,539 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727615133] [2020-12-22 09:16:34,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:16:38,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:16:38,824 WARN L197 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 53 [2020-12-22 09:16:38,981 WARN L197 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2020-12-22 09:16:39,145 WARN L197 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 48 [2020-12-22 09:16:39,404 WARN L197 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 62 [2020-12-22 09:16:39,572 WARN L197 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 66 [2020-12-22 09:16:39,871 WARN L197 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 60 [2020-12-22 09:16:40,105 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2020-12-22 09:16:40,105 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727615133] [2020-12-22 09:16:40,105 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:16:40,105 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-12-22 09:16:40,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424778369] [2020-12-22 09:16:40,106 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-22 09:16:40,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:16:40,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-22 09:16:40,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2020-12-22 09:16:40,107 INFO L87 Difference]: Start difference. First operand 631 states and 802 transitions. Second operand 13 states. [2020-12-22 09:16:42,535 WARN L197 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 74 [2020-12-22 09:16:43,169 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 61 [2020-12-22 09:16:45,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:16:45,242 INFO L93 Difference]: Finished difference Result 962 states and 1205 transitions. [2020-12-22 09:16:45,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-22 09:16:45,243 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 126 [2020-12-22 09:16:45,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:16:45,248 INFO L225 Difference]: With dead ends: 962 [2020-12-22 09:16:45,248 INFO L226 Difference]: Without dead ends: 918 [2020-12-22 09:16:45,249 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 1 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=81, Invalid=225, Unknown=0, NotChecked=0, Total=306 [2020-12-22 09:16:45,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 918 states. [2020-12-22 09:16:45,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 918 to 697. [2020-12-22 09:16:45,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 697 states. [2020-12-22 09:16:45,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 697 states to 697 states and 895 transitions. [2020-12-22 09:16:45,299 INFO L78 Accepts]: Start accepts. Automaton has 697 states and 895 transitions. Word has length 126 [2020-12-22 09:16:45,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:16:45,299 INFO L481 AbstractCegarLoop]: Abstraction has 697 states and 895 transitions. [2020-12-22 09:16:45,299 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-22 09:16:45,299 INFO L276 IsEmpty]: Start isEmpty. Operand 697 states and 895 transitions. [2020-12-22 09:16:45,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-12-22 09:16:45,302 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:16:45,302 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:16:45,302 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-12-22 09:16:45,303 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:16:45,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:16:45,303 INFO L82 PathProgramCache]: Analyzing trace with hash 2008852149, now seen corresponding path program 1 times [2020-12-22 09:16:45,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:16:45,304 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347767968] [2020-12-22 09:16:45,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:16:48,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:16:49,257 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2020-12-22 09:16:49,257 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347767968] [2020-12-22 09:16:49,257 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:16:49,258 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 09:16:49,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206980693] [2020-12-22 09:16:49,258 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 09:16:49,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:16:49,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 09:16:49,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-12-22 09:16:49,260 INFO L87 Difference]: Start difference. First operand 697 states and 895 transitions. Second operand 10 states. [2020-12-22 09:16:49,452 WARN L197 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 50 [2020-12-22 09:16:51,963 WARN L197 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 41 [2020-12-22 09:16:52,228 WARN L197 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 40 [2020-12-22 09:16:52,640 WARN L197 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 52 [2020-12-22 09:16:52,974 WARN L197 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 48 [2020-12-22 09:16:53,388 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 37 [2020-12-22 09:16:53,567 WARN L197 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 48 [2020-12-22 09:16:55,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:16:55,032 INFO L93 Difference]: Finished difference Result 1031 states and 1280 transitions. [2020-12-22 09:16:55,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-22 09:16:55,033 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 126 [2020-12-22 09:16:55,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:16:55,038 INFO L225 Difference]: With dead ends: 1031 [2020-12-22 09:16:55,038 INFO L226 Difference]: Without dead ends: 987 [2020-12-22 09:16:55,039 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 2 SyntacticMatches, 4 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=98, Invalid=244, Unknown=0, NotChecked=0, Total=342 [2020-12-22 09:16:55,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 987 states. [2020-12-22 09:16:55,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 987 to 631. [2020-12-22 09:16:55,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 631 states. [2020-12-22 09:16:55,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 631 states to 631 states and 801 transitions. [2020-12-22 09:16:55,095 INFO L78 Accepts]: Start accepts. Automaton has 631 states and 801 transitions. Word has length 126 [2020-12-22 09:16:55,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:16:55,095 INFO L481 AbstractCegarLoop]: Abstraction has 631 states and 801 transitions. [2020-12-22 09:16:55,095 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 09:16:55,096 INFO L276 IsEmpty]: Start isEmpty. Operand 631 states and 801 transitions. [2020-12-22 09:16:55,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-12-22 09:16:55,098 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:16:55,098 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:16:55,098 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-12-22 09:16:55,098 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:16:55,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:16:55,099 INFO L82 PathProgramCache]: Analyzing trace with hash -899329737, now seen corresponding path program 1 times [2020-12-22 09:16:55,099 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:16:55,099 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075842537] [2020-12-22 09:16:55,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:16:56,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:16:56,201 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2020-12-22 09:16:56,206 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075842537] [2020-12-22 09:16:56,206 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:16:56,207 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:16:56,207 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689831004] [2020-12-22 09:16:56,209 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:16:56,210 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:16:56,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:16:56,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:16:56,211 INFO L87 Difference]: Start difference. First operand 631 states and 801 transitions. Second operand 5 states. [2020-12-22 09:17:00,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:17:00,558 INFO L93 Difference]: Finished difference Result 889 states and 1119 transitions. [2020-12-22 09:17:00,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 09:17:00,562 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 126 [2020-12-22 09:17:00,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:17:00,564 INFO L225 Difference]: With dead ends: 889 [2020-12-22 09:17:00,564 INFO L226 Difference]: Without dead ends: 535 [2020-12-22 09:17:00,566 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:17:00,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 535 states. [2020-12-22 09:17:00,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 535 to 450. [2020-12-22 09:17:00,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 450 states. [2020-12-22 09:17:00,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 553 transitions. [2020-12-22 09:17:00,606 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 553 transitions. Word has length 126 [2020-12-22 09:17:00,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:17:00,607 INFO L481 AbstractCegarLoop]: Abstraction has 450 states and 553 transitions. [2020-12-22 09:17:00,607 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:17:00,607 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 553 transitions. [2020-12-22 09:17:00,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-12-22 09:17:00,609 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:17:00,609 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:17:00,609 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-12-22 09:17:00,609 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:17:00,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:17:00,610 INFO L82 PathProgramCache]: Analyzing trace with hash 476211429, now seen corresponding path program 1 times [2020-12-22 09:17:00,610 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:17:00,610 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159127561] [2020-12-22 09:17:00,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:17:02,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:17:02,648 WARN L197 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 56 [2020-12-22 09:17:03,279 WARN L197 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 49 [2020-12-22 09:17:03,490 WARN L197 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 45 [2020-12-22 09:17:03,581 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2020-12-22 09:17:03,582 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159127561] [2020-12-22 09:17:03,582 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:17:03,582 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:17:03,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520613193] [2020-12-22 09:17:03,583 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:17:03,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:17:03,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:17:03,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:17:03,584 INFO L87 Difference]: Start difference. First operand 450 states and 553 transitions. Second operand 6 states. [2020-12-22 09:17:06,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:17:06,550 INFO L93 Difference]: Finished difference Result 684 states and 834 transitions. [2020-12-22 09:17:06,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:17:06,551 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 127 [2020-12-22 09:17:06,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:17:06,553 INFO L225 Difference]: With dead ends: 684 [2020-12-22 09:17:06,553 INFO L226 Difference]: Without dead ends: 428 [2020-12-22 09:17:06,554 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 2 SyntacticMatches, 14 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-12-22 09:17:06,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 428 states. [2020-12-22 09:17:06,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 428 to 428. [2020-12-22 09:17:06,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 428 states. [2020-12-22 09:17:06,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 428 states to 428 states and 526 transitions. [2020-12-22 09:17:06,590 INFO L78 Accepts]: Start accepts. Automaton has 428 states and 526 transitions. Word has length 127 [2020-12-22 09:17:06,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:17:06,590 INFO L481 AbstractCegarLoop]: Abstraction has 428 states and 526 transitions. [2020-12-22 09:17:06,590 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:17:06,590 INFO L276 IsEmpty]: Start isEmpty. Operand 428 states and 526 transitions. [2020-12-22 09:17:06,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-12-22 09:17:06,592 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:17:06,592 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:17:06,592 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-12-22 09:17:06,592 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:17:06,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:17:06,593 INFO L82 PathProgramCache]: Analyzing trace with hash -1438796379, now seen corresponding path program 1 times [2020-12-22 09:17:06,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:17:06,593 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694302273] [2020-12-22 09:17:06,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:17:10,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:17:11,142 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2020-12-22 09:17:11,143 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694302273] [2020-12-22 09:17:11,143 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:17:11,144 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 09:17:11,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765006695] [2020-12-22 09:17:11,144 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 09:17:11,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:17:11,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 09:17:11,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 09:17:11,145 INFO L87 Difference]: Start difference. First operand 428 states and 526 transitions. Second operand 4 states. [2020-12-22 09:17:11,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:17:11,782 INFO L93 Difference]: Finished difference Result 816 states and 988 transitions. [2020-12-22 09:17:11,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 09:17:11,783 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 127 [2020-12-22 09:17:11,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:17:11,785 INFO L225 Difference]: With dead ends: 816 [2020-12-22 09:17:11,786 INFO L226 Difference]: Without dead ends: 505 [2020-12-22 09:17:11,790 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 09:17:11,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 505 states. [2020-12-22 09:17:11,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 505 to 449. [2020-12-22 09:17:11,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 449 states. [2020-12-22 09:17:11,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 449 states to 449 states and 547 transitions. [2020-12-22 09:17:11,840 INFO L78 Accepts]: Start accepts. Automaton has 449 states and 547 transitions. Word has length 127 [2020-12-22 09:17:11,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:17:11,841 INFO L481 AbstractCegarLoop]: Abstraction has 449 states and 547 transitions. [2020-12-22 09:17:11,841 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 09:17:11,841 INFO L276 IsEmpty]: Start isEmpty. Operand 449 states and 547 transitions. [2020-12-22 09:17:11,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-12-22 09:17:11,842 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:17:11,842 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:17:11,843 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-12-22 09:17:11,843 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:17:11,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:17:11,843 INFO L82 PathProgramCache]: Analyzing trace with hash 1628409183, now seen corresponding path program 1 times [2020-12-22 09:17:11,844 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:17:11,844 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891407847] [2020-12-22 09:17:11,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:17:29,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:17:30,710 WARN L197 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 81 [2020-12-22 09:17:31,391 WARN L197 SmtUtils]: Spent 637.00 ms on a formula simplification. DAG size of input: 172 DAG size of output: 134 [2020-12-22 09:17:32,367 WARN L197 SmtUtils]: Spent 632.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 155 [2020-12-22 09:17:33,392 WARN L197 SmtUtils]: Spent 957.00 ms on a formula simplification. DAG size of input: 243 DAG size of output: 174 [2020-12-22 09:17:34,801 WARN L197 SmtUtils]: Spent 1.32 s on a formula simplification. DAG size of input: 242 DAG size of output: 182 [2020-12-22 09:17:36,405 WARN L197 SmtUtils]: Spent 1.43 s on a formula simplification. DAG size of input: 266 DAG size of output: 195 [2020-12-22 09:17:38,157 WARN L197 SmtUtils]: Spent 1.59 s on a formula simplification. DAG size of input: 326 DAG size of output: 219 [2020-12-22 09:17:40,572 WARN L197 SmtUtils]: Spent 2.22 s on a formula simplification. DAG size of input: 380 DAG size of output: 226 [2020-12-22 09:17:42,986 WARN L197 SmtUtils]: Spent 2.23 s on a formula simplification. DAG size of input: 373 DAG size of output: 219 [2020-12-22 09:17:44,623 WARN L197 SmtUtils]: Spent 1.45 s on a formula simplification. DAG size of input: 343 DAG size of output: 215 [2020-12-22 09:17:46,266 WARN L197 SmtUtils]: Spent 1.20 s on a formula simplification. DAG size of input: 317 DAG size of output: 185 [2020-12-22 09:17:47,651 WARN L197 SmtUtils]: Spent 1.19 s on a formula simplification. DAG size of input: 291 DAG size of output: 196 [2020-12-22 09:17:49,141 WARN L197 SmtUtils]: Spent 1.23 s on a formula simplification. DAG size of input: 315 DAG size of output: 209 [2020-12-22 09:17:50,827 WARN L197 SmtUtils]: Spent 1.40 s on a formula simplification. DAG size of input: 306 DAG size of output: 201 [2020-12-22 09:17:52,512 WARN L197 SmtUtils]: Spent 1.36 s on a formula simplification. DAG size of input: 290 DAG size of output: 195 [2020-12-22 09:17:54,372 WARN L197 SmtUtils]: Spent 1.30 s on a formula simplification. DAG size of input: 299 DAG size of output: 199 [2020-12-22 09:17:55,852 WARN L197 SmtUtils]: Spent 1.25 s on a formula simplification. DAG size of input: 289 DAG size of output: 192 [2020-12-22 09:17:57,283 WARN L197 SmtUtils]: Spent 1.16 s on a formula simplification. DAG size of input: 299 DAG size of output: 191 [2020-12-22 09:17:58,286 WARN L197 SmtUtils]: Spent 790.00 ms on a formula simplification. DAG size of input: 236 DAG size of output: 159 [2020-12-22 09:17:59,210 WARN L197 SmtUtils]: Spent 713.00 ms on a formula simplification. DAG size of input: 220 DAG size of output: 152 [2020-12-22 09:18:00,239 WARN L197 SmtUtils]: Spent 800.00 ms on a formula simplification. DAG size of input: 230 DAG size of output: 162 [2020-12-22 09:18:01,145 WARN L197 SmtUtils]: Spent 665.00 ms on a formula simplification. DAG size of input: 218 DAG size of output: 150 [2020-12-22 09:18:02,041 WARN L197 SmtUtils]: Spent 670.00 ms on a formula simplification. DAG size of input: 206 DAG size of output: 144 [2020-12-22 09:18:02,783 WARN L197 SmtUtils]: Spent 542.00 ms on a formula simplification. DAG size of input: 184 DAG size of output: 132 [2020-12-22 09:18:03,529 WARN L197 SmtUtils]: Spent 564.00 ms on a formula simplification. DAG size of input: 183 DAG size of output: 130 [2020-12-22 09:18:04,177 WARN L197 SmtUtils]: Spent 463.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 118 [2020-12-22 09:18:04,769 WARN L197 SmtUtils]: Spent 408.00 ms on a formula simplification. DAG size of input: 151 DAG size of output: 99 [2020-12-22 09:18:05,338 WARN L197 SmtUtils]: Spent 380.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 96 [2020-12-22 09:18:05,836 WARN L197 SmtUtils]: Spent 304.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 78 [2020-12-22 09:18:06,329 WARN L197 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 73 [2020-12-22 09:18:06,669 WARN L197 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 38 [2020-12-22 09:18:07,282 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2020-12-22 09:18:07,282 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891407847] [2020-12-22 09:18:07,282 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:18:07,283 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2020-12-22 09:18:07,283 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672265748] [2020-12-22 09:18:07,283 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-12-22 09:18:07,283 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:18:07,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-12-22 09:18:07,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=928, Unknown=0, NotChecked=0, Total=1056 [2020-12-22 09:18:07,285 INFO L87 Difference]: Start difference. First operand 449 states and 547 transitions. Second operand 33 states. [2020-12-22 09:18:08,046 WARN L197 SmtUtils]: Spent 329.00 ms on a formula simplification that was a NOOP. DAG size: 147 [2020-12-22 09:18:11,839 WARN L197 SmtUtils]: Spent 1.33 s on a formula simplification. DAG size of input: 185 DAG size of output: 179 [2020-12-22 09:18:13,334 WARN L197 SmtUtils]: Spent 1.36 s on a formula simplification. DAG size of input: 192 DAG size of output: 181 [2020-12-22 09:18:14,923 WARN L197 SmtUtils]: Spent 1.45 s on a formula simplification. DAG size of input: 208 DAG size of output: 185 [2020-12-22 09:18:17,875 WARN L197 SmtUtils]: Spent 2.14 s on a formula simplification. DAG size of input: 305 DAG size of output: 217 [2020-12-22 09:18:19,808 WARN L197 SmtUtils]: Spent 1.68 s on a formula simplification. DAG size of input: 257 DAG size of output: 209 [2020-12-22 09:18:22,287 WARN L197 SmtUtils]: Spent 1.88 s on a formula simplification. DAG size of input: 221 DAG size of output: 216 [2020-12-22 09:18:24,854 WARN L197 SmtUtils]: Spent 1.33 s on a formula simplification. DAG size of input: 250 DAG size of output: 202 [2020-12-22 09:18:26,813 WARN L197 SmtUtils]: Spent 1.55 s on a formula simplification. DAG size of input: 243 DAG size of output: 192 [2020-12-22 09:18:29,725 WARN L197 SmtUtils]: Spent 1.75 s on a formula simplification. DAG size of input: 252 DAG size of output: 245 [2020-12-22 09:18:33,508 WARN L197 SmtUtils]: Spent 3.16 s on a formula simplification. DAG size of input: 289 DAG size of output: 253 [2020-12-22 09:18:37,435 WARN L197 SmtUtils]: Spent 2.87 s on a formula simplification. DAG size of input: 276 DAG size of output: 250 [2020-12-22 09:18:41,819 WARN L197 SmtUtils]: Spent 4.05 s on a formula simplification. DAG size of input: 317 DAG size of output: 278 [2020-12-22 09:18:48,502 WARN L197 SmtUtils]: Spent 3.75 s on a formula simplification. DAG size of input: 334 DAG size of output: 260