/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.3.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 09:05:06,520 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 09:05:06,523 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 09:05:06,579 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 09:05:06,580 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 09:05:06,584 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 09:05:06,588 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 09:05:06,597 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 09:05:06,601 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 09:05:06,607 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 09:05:06,609 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 09:05:06,611 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 09:05:06,611 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 09:05:06,615 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 09:05:06,617 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 09:05:06,620 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 09:05:06,621 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 09:05:06,626 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 09:05:06,640 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 09:05:06,648 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 09:05:06,650 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 09:05:06,652 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 09:05:06,655 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 09:05:06,656 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 09:05:06,662 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 09:05:06,673 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 09:05:06,674 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 09:05:06,675 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 09:05:06,676 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 09:05:06,729 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 09:05:06,729 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 09:05:06,731 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 09:05:06,731 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 09:05:06,732 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 09:05:06,732 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 09:05:06,732 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 09:05:06,733 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 09:05:06,733 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 09:05:06,733 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 09:05:06,733 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 09:05:06,734 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 09:05:06,734 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 09:05:06,734 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 09:05:06,734 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 09:05:06,735 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 09:05:06,735 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 09:05:06,735 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 09:05:06,736 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 09:05:06,736 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 09:05:06,736 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 09:05:06,736 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 09:05:06,737 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 09:05:06,737 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 09:05:06,737 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 09:05:06,737 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 09:05:07,094 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 09:05:07,124 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 09:05:07,127 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 09:05:07,128 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 09:05:07,129 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 09:05:07,130 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.3.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c [2020-12-22 09:05:07,208 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5ce29e097/076cedb57a97474d9b041c6410d2cc13/FLAG8a0bbcdff [2020-12-22 09:05:07,891 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 09:05:07,891 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.3.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c [2020-12-22 09:05:07,913 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5ce29e097/076cedb57a97474d9b041c6410d2cc13/FLAG8a0bbcdff [2020-12-22 09:05:08,162 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5ce29e097/076cedb57a97474d9b041c6410d2cc13 [2020-12-22 09:05:08,165 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 09:05:08,168 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 09:05:08,170 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 09:05:08,170 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 09:05:08,175 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 09:05:08,176 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 09:05:08" (1/1) ... [2020-12-22 09:05:08,177 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@153b013e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:05:08, skipping insertion in model container [2020-12-22 09:05:08,178 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 09:05:08" (1/1) ... [2020-12-22 09:05:08,191 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 09:05:08,250 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 09:05:08,606 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.3.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c[15562,15575] [2020-12-22 09:05:08,708 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 09:05:08,728 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 09:05:08,884 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.3.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c[15562,15575] [2020-12-22 09:05:09,011 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 09:05:09,061 INFO L208 MainTranslator]: Completed translation [2020-12-22 09:05:09,061 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:05:09 WrapperNode [2020-12-22 09:05:09,062 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 09:05:09,065 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 09:05:09,065 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 09:05:09,065 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 09:05:09,076 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:05:09" (1/1) ... [2020-12-22 09:05:09,119 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:05:09" (1/1) ... [2020-12-22 09:05:09,226 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 09:05:09,227 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 09:05:09,227 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 09:05:09,228 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 09:05:09,240 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:05:09" (1/1) ... [2020-12-22 09:05:09,241 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:05:09" (1/1) ... [2020-12-22 09:05:09,251 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:05:09" (1/1) ... [2020-12-22 09:05:09,252 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:05:09" (1/1) ... [2020-12-22 09:05:09,295 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:05:09" (1/1) ... [2020-12-22 09:05:09,323 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:05:09" (1/1) ... [2020-12-22 09:05:09,335 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:05:09" (1/1) ... [2020-12-22 09:05:09,344 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 09:05:09,345 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 09:05:09,345 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 09:05:09,345 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 09:05:09,346 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:05:09" (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 09:05:09,460 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 09:05:09,461 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 09:05:09,461 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 09:05:09,461 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 09:05:10,958 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 09:05:10,959 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2020-12-22 09:05:10,961 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 09:05:10 BoogieIcfgContainer [2020-12-22 09:05:10,961 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 09:05:10,963 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 09:05:10,964 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 09:05:10,967 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 09:05:10,967 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 09:05:08" (1/3) ... [2020-12-22 09:05:10,968 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3707302a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 09:05:10, skipping insertion in model container [2020-12-22 09:05:10,968 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:05:09" (2/3) ... [2020-12-22 09:05:10,969 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3707302a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 09:05:10, skipping insertion in model container [2020-12-22 09:05:10,969 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 09:05:10" (3/3) ... [2020-12-22 09:05:10,971 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.3.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c [2020-12-22 09:05:10,977 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 09:05:10,983 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 09:05:11,003 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 09:05:11,035 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 09:05:11,035 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 09:05:11,035 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 09:05:11,035 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 09:05:11,035 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 09:05:11,035 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 09:05:11,036 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 09:05:11,036 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 09:05:11,059 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states. [2020-12-22 09:05:11,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2020-12-22 09:05:11,075 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:05:11,077 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:05:11,077 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:05:11,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:05:11,084 INFO L82 PathProgramCache]: Analyzing trace with hash -1686891750, now seen corresponding path program 1 times [2020-12-22 09:05:11,095 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:05:11,095 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937146824] [2020-12-22 09:05:11,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:05:11,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:05:11,809 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 09:05:11,810 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937146824] [2020-12-22 09:05:11,810 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:05:11,811 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:05:11,812 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319796991] [2020-12-22 09:05:11,817 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:05:11,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:05:11,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:05:11,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:05:11,836 INFO L87 Difference]: Start difference. First operand 337 states. Second operand 3 states. [2020-12-22 09:05:12,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:05:12,040 INFO L93 Difference]: Finished difference Result 664 states and 1156 transitions. [2020-12-22 09:05:12,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:05:12,042 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 153 [2020-12-22 09:05:12,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:05:12,065 INFO L225 Difference]: With dead ends: 664 [2020-12-22 09:05:12,066 INFO L226 Difference]: Without dead ends: 543 [2020-12-22 09:05:12,070 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 09:05:12,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 543 states. [2020-12-22 09:05:12,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 543 to 541. [2020-12-22 09:05:12,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 541 states. [2020-12-22 09:05:12,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 541 states to 541 states and 810 transitions. [2020-12-22 09:05:12,223 INFO L78 Accepts]: Start accepts. Automaton has 541 states and 810 transitions. Word has length 153 [2020-12-22 09:05:12,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:05:12,224 INFO L481 AbstractCegarLoop]: Abstraction has 541 states and 810 transitions. [2020-12-22 09:05:12,225 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:05:12,225 INFO L276 IsEmpty]: Start isEmpty. Operand 541 states and 810 transitions. [2020-12-22 09:05:12,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2020-12-22 09:05:12,232 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:05:12,239 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:05:12,240 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 09:05:12,240 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:05:12,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:05:12,241 INFO L82 PathProgramCache]: Analyzing trace with hash -2064713451, now seen corresponding path program 1 times [2020-12-22 09:05:12,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:05:12,241 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435981092] [2020-12-22 09:05:12,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:05:12,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:05:12,756 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:05:12,756 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435981092] [2020-12-22 09:05:12,757 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:05:12,757 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 09:05:12,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343341746] [2020-12-22 09:05:12,761 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 09:05:12,761 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:05:12,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 09:05:12,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 09:05:12,783 INFO L87 Difference]: Start difference. First operand 541 states and 810 transitions. Second operand 4 states. [2020-12-22 09:05:12,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:05:12,950 INFO L93 Difference]: Finished difference Result 1576 states and 2351 transitions. [2020-12-22 09:05:12,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 09:05:12,951 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 153 [2020-12-22 09:05:12,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:05:12,958 INFO L225 Difference]: With dead ends: 1576 [2020-12-22 09:05:12,958 INFO L226 Difference]: Without dead ends: 1044 [2020-12-22 09:05:12,963 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:05:12,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1044 states. [2020-12-22 09:05:13,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1044 to 1042. [2020-12-22 09:05:13,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1042 states. [2020-12-22 09:05:13,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1042 states to 1042 states and 1543 transitions. [2020-12-22 09:05:13,050 INFO L78 Accepts]: Start accepts. Automaton has 1042 states and 1543 transitions. Word has length 153 [2020-12-22 09:05:13,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:05:13,053 INFO L481 AbstractCegarLoop]: Abstraction has 1042 states and 1543 transitions. [2020-12-22 09:05:13,053 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 09:05:13,053 INFO L276 IsEmpty]: Start isEmpty. Operand 1042 states and 1543 transitions. [2020-12-22 09:05:13,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2020-12-22 09:05:13,062 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:05:13,062 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:05:13,062 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 09:05:13,063 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:05:13,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:05:13,066 INFO L82 PathProgramCache]: Analyzing trace with hash -2039605151, now seen corresponding path program 1 times [2020-12-22 09:05:13,067 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:05:13,067 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99869774] [2020-12-22 09:05:13,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:05:13,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:05:13,190 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 09:05:13,191 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99869774] [2020-12-22 09:05:13,191 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:05:13,192 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:05:13,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057285469] [2020-12-22 09:05:13,193 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:05:13,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:05:13,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:05:13,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:05:13,198 INFO L87 Difference]: Start difference. First operand 1042 states and 1543 transitions. Second operand 3 states. [2020-12-22 09:05:13,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:05:13,288 INFO L93 Difference]: Finished difference Result 3088 states and 4567 transitions. [2020-12-22 09:05:13,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:05:13,289 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 154 [2020-12-22 09:05:13,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:05:13,301 INFO L225 Difference]: With dead ends: 3088 [2020-12-22 09:05:13,302 INFO L226 Difference]: Without dead ends: 2074 [2020-12-22 09:05:13,304 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 09:05:13,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2074 states. [2020-12-22 09:05:13,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2074 to 1044. [2020-12-22 09:05:13,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1044 states. [2020-12-22 09:05:13,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1044 states to 1044 states and 1545 transitions. [2020-12-22 09:05:13,416 INFO L78 Accepts]: Start accepts. Automaton has 1044 states and 1545 transitions. Word has length 154 [2020-12-22 09:05:13,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:05:13,417 INFO L481 AbstractCegarLoop]: Abstraction has 1044 states and 1545 transitions. [2020-12-22 09:05:13,417 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:05:13,418 INFO L276 IsEmpty]: Start isEmpty. Operand 1044 states and 1545 transitions. [2020-12-22 09:05:13,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2020-12-22 09:05:13,421 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:05:13,422 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:05:13,422 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 09:05:13,424 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:05:13,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:05:13,425 INFO L82 PathProgramCache]: Analyzing trace with hash 1427333698, now seen corresponding path program 1 times [2020-12-22 09:05:13,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:05:13,426 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463488610] [2020-12-22 09:05:13,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:05:13,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:05:13,587 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 09:05:13,588 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463488610] [2020-12-22 09:05:13,589 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:05:13,589 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:05:13,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287221843] [2020-12-22 09:05:13,590 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:05:13,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:05:13,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:05:13,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:05:13,593 INFO L87 Difference]: Start difference. First operand 1044 states and 1545 transitions. Second operand 3 states. [2020-12-22 09:05:13,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:05:13,812 INFO L93 Difference]: Finished difference Result 2685 states and 3975 transitions. [2020-12-22 09:05:13,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:05:13,814 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 155 [2020-12-22 09:05:13,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:05:13,830 INFO L225 Difference]: With dead ends: 2685 [2020-12-22 09:05:13,830 INFO L226 Difference]: Without dead ends: 1836 [2020-12-22 09:05:13,833 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 09:05:13,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1836 states. [2020-12-22 09:05:13,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1836 to 1834. [2020-12-22 09:05:13,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1834 states. [2020-12-22 09:05:14,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1834 states to 1834 states and 2677 transitions. [2020-12-22 09:05:14,030 INFO L78 Accepts]: Start accepts. Automaton has 1834 states and 2677 transitions. Word has length 155 [2020-12-22 09:05:14,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:05:14,032 INFO L481 AbstractCegarLoop]: Abstraction has 1834 states and 2677 transitions. [2020-12-22 09:05:14,032 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:05:14,033 INFO L276 IsEmpty]: Start isEmpty. Operand 1834 states and 2677 transitions. [2020-12-22 09:05:14,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2020-12-22 09:05:14,043 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:05:14,044 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:05:14,044 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 09:05:14,045 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:05:14,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:05:14,046 INFO L82 PathProgramCache]: Analyzing trace with hash -697762299, now seen corresponding path program 1 times [2020-12-22 09:05:14,046 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:05:14,047 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020327617] [2020-12-22 09:05:14,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:05:14,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:05:14,464 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 09:05:14,464 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020327617] [2020-12-22 09:05:14,464 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:05:14,465 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:05:14,465 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958057812] [2020-12-22 09:05:14,466 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:05:14,466 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:05:14,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:05:14,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:05:14,468 INFO L87 Difference]: Start difference. First operand 1834 states and 2677 transitions. Second operand 5 states. [2020-12-22 09:05:14,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:05:14,760 INFO L93 Difference]: Finished difference Result 5180 states and 7552 transitions. [2020-12-22 09:05:14,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 09:05:14,762 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 155 [2020-12-22 09:05:14,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:05:14,780 INFO L225 Difference]: With dead ends: 5180 [2020-12-22 09:05:14,781 INFO L226 Difference]: Without dead ends: 3360 [2020-12-22 09:05:14,787 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:05:14,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3360 states. [2020-12-22 09:05:15,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3360 to 3358. [2020-12-22 09:05:15,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3358 states. [2020-12-22 09:05:15,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3358 states to 3358 states and 4850 transitions. [2020-12-22 09:05:15,073 INFO L78 Accepts]: Start accepts. Automaton has 3358 states and 4850 transitions. Word has length 155 [2020-12-22 09:05:15,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:05:15,074 INFO L481 AbstractCegarLoop]: Abstraction has 3358 states and 4850 transitions. [2020-12-22 09:05:15,074 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:05:15,074 INFO L276 IsEmpty]: Start isEmpty. Operand 3358 states and 4850 transitions. [2020-12-22 09:05:15,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2020-12-22 09:05:15,081 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:05:15,082 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:05:15,083 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 09:05:15,083 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:05:15,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:05:15,083 INFO L82 PathProgramCache]: Analyzing trace with hash 1444100468, now seen corresponding path program 1 times [2020-12-22 09:05:15,084 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:05:15,084 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105571136] [2020-12-22 09:05:15,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:05:15,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:05:15,296 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 09:05:15,297 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105571136] [2020-12-22 09:05:15,297 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:05:15,297 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 09:05:15,298 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159483946] [2020-12-22 09:05:15,298 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 09:05:15,299 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:05:15,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 09:05:15,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 09:05:15,300 INFO L87 Difference]: Start difference. First operand 3358 states and 4850 transitions. Second operand 4 states. [2020-12-22 09:05:15,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:05:15,803 INFO L93 Difference]: Finished difference Result 9771 states and 14053 transitions. [2020-12-22 09:05:15,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 09:05:15,804 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 155 [2020-12-22 09:05:15,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:05:15,841 INFO L225 Difference]: With dead ends: 9771 [2020-12-22 09:05:15,841 INFO L226 Difference]: Without dead ends: 6469 [2020-12-22 09:05:15,847 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:05:15,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6469 states. [2020-12-22 09:05:16,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6469 to 6467. [2020-12-22 09:05:16,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6467 states. [2020-12-22 09:05:16,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6467 states to 6467 states and 9211 transitions. [2020-12-22 09:05:16,368 INFO L78 Accepts]: Start accepts. Automaton has 6467 states and 9211 transitions. Word has length 155 [2020-12-22 09:05:16,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:05:16,369 INFO L481 AbstractCegarLoop]: Abstraction has 6467 states and 9211 transitions. [2020-12-22 09:05:16,369 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 09:05:16,369 INFO L276 IsEmpty]: Start isEmpty. Operand 6467 states and 9211 transitions. [2020-12-22 09:05:16,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2020-12-22 09:05:16,381 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:05:16,382 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:05:16,382 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 09:05:16,382 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:05:16,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:05:16,389 INFO L82 PathProgramCache]: Analyzing trace with hash 1505045856, now seen corresponding path program 1 times [2020-12-22 09:05:16,390 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:05:16,390 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372935813] [2020-12-22 09:05:16,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:05:16,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:05:16,462 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 09:05:16,462 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372935813] [2020-12-22 09:05:16,463 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:05:16,463 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:05:16,463 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532720894] [2020-12-22 09:05:16,464 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:05:16,464 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:05:16,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:05:16,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:05:16,465 INFO L87 Difference]: Start difference. First operand 6467 states and 9211 transitions. Second operand 3 states. [2020-12-22 09:05:17,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:05:17,270 INFO L93 Difference]: Finished difference Result 19249 states and 27400 transitions. [2020-12-22 09:05:17,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:05:17,270 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 156 [2020-12-22 09:05:17,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:05:17,343 INFO L225 Difference]: With dead ends: 19249 [2020-12-22 09:05:17,343 INFO L226 Difference]: Without dead ends: 12873 [2020-12-22 09:05:17,357 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 09:05:17,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12873 states. [2020-12-22 09:05:17,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12873 to 6477. [2020-12-22 09:05:17,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6477 states. [2020-12-22 09:05:17,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6477 states to 6477 states and 9221 transitions. [2020-12-22 09:05:17,957 INFO L78 Accepts]: Start accepts. Automaton has 6477 states and 9221 transitions. Word has length 156 [2020-12-22 09:05:17,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:05:17,957 INFO L481 AbstractCegarLoop]: Abstraction has 6477 states and 9221 transitions. [2020-12-22 09:05:17,958 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:05:17,958 INFO L276 IsEmpty]: Start isEmpty. Operand 6477 states and 9221 transitions. [2020-12-22 09:05:17,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2020-12-22 09:05:17,969 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:05:17,969 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:05:17,969 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 09:05:17,970 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:05:17,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:05:17,970 INFO L82 PathProgramCache]: Analyzing trace with hash -1440271021, now seen corresponding path program 1 times [2020-12-22 09:05:17,970 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:05:17,971 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921969283] [2020-12-22 09:05:17,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:05:18,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:05:18,195 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 09:05:18,196 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921969283] [2020-12-22 09:05:18,196 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:05:18,196 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 09:05:18,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332067197] [2020-12-22 09:05:18,197 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 09:05:18,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:05:18,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 09:05:18,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 09:05:18,199 INFO L87 Difference]: Start difference. First operand 6477 states and 9221 transitions. Second operand 4 states. [2020-12-22 09:05:19,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:05:19,076 INFO L93 Difference]: Finished difference Result 18755 states and 26616 transitions. [2020-12-22 09:05:19,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 09:05:19,076 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 157 [2020-12-22 09:05:19,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:05:19,120 INFO L225 Difference]: With dead ends: 18755 [2020-12-22 09:05:19,121 INFO L226 Difference]: Without dead ends: 12379 [2020-12-22 09:05:19,133 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:05:19,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12379 states. [2020-12-22 09:05:20,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12379 to 12377. [2020-12-22 09:05:20,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12377 states. [2020-12-22 09:05:20,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12377 states to 12377 states and 17383 transitions. [2020-12-22 09:05:20,277 INFO L78 Accepts]: Start accepts. Automaton has 12377 states and 17383 transitions. Word has length 157 [2020-12-22 09:05:20,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:05:20,279 INFO L481 AbstractCegarLoop]: Abstraction has 12377 states and 17383 transitions. [2020-12-22 09:05:20,279 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 09:05:20,279 INFO L276 IsEmpty]: Start isEmpty. Operand 12377 states and 17383 transitions. [2020-12-22 09:05:20,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2020-12-22 09:05:20,301 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:05:20,301 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:05:20,301 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 09:05:20,302 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:05:20,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:05:20,302 INFO L82 PathProgramCache]: Analyzing trace with hash 118105567, now seen corresponding path program 1 times [2020-12-22 09:05:20,303 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:05:20,303 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510788204] [2020-12-22 09:05:20,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:05:20,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:05:20,373 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 09:05:20,379 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510788204] [2020-12-22 09:05:20,379 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:05:20,380 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:05:20,380 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57897946] [2020-12-22 09:05:20,381 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:05:20,382 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:05:20,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:05:20,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:05:20,383 INFO L87 Difference]: Start difference. First operand 12377 states and 17383 transitions. Second operand 3 states. [2020-12-22 09:05:21,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:05:21,929 INFO L93 Difference]: Finished difference Result 35905 states and 50587 transitions. [2020-12-22 09:05:21,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:05:21,930 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 158 [2020-12-22 09:05:21,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:05:21,978 INFO L225 Difference]: With dead ends: 35905 [2020-12-22 09:05:21,979 INFO L226 Difference]: Without dead ends: 24471 [2020-12-22 09:05:21,998 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 09:05:22,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24471 states. [2020-12-22 09:05:23,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24471 to 12397. [2020-12-22 09:05:23,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12397 states. [2020-12-22 09:05:23,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12397 states to 12397 states and 17403 transitions. [2020-12-22 09:05:23,184 INFO L78 Accepts]: Start accepts. Automaton has 12397 states and 17403 transitions. Word has length 158 [2020-12-22 09:05:23,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:05:23,185 INFO L481 AbstractCegarLoop]: Abstraction has 12397 states and 17403 transitions. [2020-12-22 09:05:23,185 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:05:23,185 INFO L276 IsEmpty]: Start isEmpty. Operand 12397 states and 17403 transitions. [2020-12-22 09:05:23,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2020-12-22 09:05:23,208 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:05:23,208 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:05:23,209 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 09:05:23,209 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:05:23,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:05:23,210 INFO L82 PathProgramCache]: Analyzing trace with hash 2082450610, now seen corresponding path program 1 times [2020-12-22 09:05:23,210 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:05:23,210 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480558243] [2020-12-22 09:05:23,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:05:23,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:05:23,425 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 09:05:23,426 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480558243] [2020-12-22 09:05:23,426 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:05:23,426 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 09:05:23,427 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955745542] [2020-12-22 09:05:23,427 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 09:05:23,428 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:05:23,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 09:05:23,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 09:05:23,429 INFO L87 Difference]: Start difference. First operand 12397 states and 17403 transitions. Second operand 4 states. [2020-12-22 09:05:24,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:05:24,203 INFO L93 Difference]: Finished difference Result 20718 states and 29194 transitions. [2020-12-22 09:05:24,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 09:05:24,205 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 159 [2020-12-22 09:05:24,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:05:24,222 INFO L225 Difference]: With dead ends: 20718 [2020-12-22 09:05:24,222 INFO L226 Difference]: Without dead ends: 8890 [2020-12-22 09:05:24,237 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:05:24,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8890 states. [2020-12-22 09:05:24,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8890 to 8890. [2020-12-22 09:05:24,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8890 states. [2020-12-22 09:05:24,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8890 states to 8890 states and 12501 transitions. [2020-12-22 09:05:24,791 INFO L78 Accepts]: Start accepts. Automaton has 8890 states and 12501 transitions. Word has length 159 [2020-12-22 09:05:24,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:05:24,791 INFO L481 AbstractCegarLoop]: Abstraction has 8890 states and 12501 transitions. [2020-12-22 09:05:24,791 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 09:05:24,791 INFO L276 IsEmpty]: Start isEmpty. Operand 8890 states and 12501 transitions. [2020-12-22 09:05:24,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2020-12-22 09:05:24,805 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:05:24,806 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:05:24,806 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 09:05:24,806 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:05:24,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:05:24,807 INFO L82 PathProgramCache]: Analyzing trace with hash -963424656, now seen corresponding path program 1 times [2020-12-22 09:05:24,807 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:05:24,807 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331382608] [2020-12-22 09:05:24,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:05:24,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:05:24,977 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 09:05:24,977 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331382608] [2020-12-22 09:05:24,977 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:05:24,977 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:05:24,978 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76648155] [2020-12-22 09:05:24,978 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:05:24,978 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:05:24,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:05:24,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:05:24,981 INFO L87 Difference]: Start difference. First operand 8890 states and 12501 transitions. Second operand 3 states. [2020-12-22 09:05:25,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:05:25,727 INFO L93 Difference]: Finished difference Result 21426 states and 30719 transitions. [2020-12-22 09:05:25,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:05:25,727 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 163 [2020-12-22 09:05:25,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:05:25,758 INFO L225 Difference]: With dead ends: 21426 [2020-12-22 09:05:25,758 INFO L226 Difference]: Without dead ends: 13276 [2020-12-22 09:05:25,773 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 09:05:25,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13276 states. [2020-12-22 09:05:26,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13276 to 11474. [2020-12-22 09:05:26,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11474 states. [2020-12-22 09:05:26,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11474 states to 11474 states and 16609 transitions. [2020-12-22 09:05:26,518 INFO L78 Accepts]: Start accepts. Automaton has 11474 states and 16609 transitions. Word has length 163 [2020-12-22 09:05:26,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:05:26,518 INFO L481 AbstractCegarLoop]: Abstraction has 11474 states and 16609 transitions. [2020-12-22 09:05:26,518 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:05:26,518 INFO L276 IsEmpty]: Start isEmpty. Operand 11474 states and 16609 transitions. [2020-12-22 09:05:26,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2020-12-22 09:05:26,530 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:05:26,530 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:05:26,531 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 09:05:26,531 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:05:26,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:05:26,532 INFO L82 PathProgramCache]: Analyzing trace with hash -82600529, now seen corresponding path program 1 times [2020-12-22 09:05:26,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:05:26,532 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537298702] [2020-12-22 09:05:26,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:05:26,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:05:26,640 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 09:05:26,640 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537298702] [2020-12-22 09:05:26,641 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:05:26,641 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:05:26,641 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251727528] [2020-12-22 09:05:26,641 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:05:26,642 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:05:26,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:05:26,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:05:26,643 INFO L87 Difference]: Start difference. First operand 11474 states and 16609 transitions. Second operand 3 states. [2020-12-22 09:05:27,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:05:27,989 INFO L93 Difference]: Finished difference Result 31844 states and 46303 transitions. [2020-12-22 09:05:27,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:05:27,990 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 166 [2020-12-22 09:05:27,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:05:28,038 INFO L225 Difference]: With dead ends: 31844 [2020-12-22 09:05:28,038 INFO L226 Difference]: Without dead ends: 21590 [2020-12-22 09:05:28,060 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 09:05:28,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21590 states. [2020-12-22 09:05:29,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21590 to 21588. [2020-12-22 09:05:29,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21588 states. [2020-12-22 09:05:29,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21588 states to 21588 states and 30909 transitions. [2020-12-22 09:05:29,477 INFO L78 Accepts]: Start accepts. Automaton has 21588 states and 30909 transitions. Word has length 166 [2020-12-22 09:05:29,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:05:29,477 INFO L481 AbstractCegarLoop]: Abstraction has 21588 states and 30909 transitions. [2020-12-22 09:05:29,478 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:05:29,478 INFO L276 IsEmpty]: Start isEmpty. Operand 21588 states and 30909 transitions. [2020-12-22 09:05:29,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2020-12-22 09:05:29,497 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:05:29,497 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:05:29,497 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 09:05:29,498 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:05:29,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:05:29,498 INFO L82 PathProgramCache]: Analyzing trace with hash -1261597364, now seen corresponding path program 1 times [2020-12-22 09:05:29,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:05:29,499 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938953204] [2020-12-22 09:05:29,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:05:29,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:05:29,836 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 09:05:29,837 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938953204] [2020-12-22 09:05:29,837 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:05:29,837 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 09:05:29,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673976630] [2020-12-22 09:05:29,838 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 09:05:29,838 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:05:29,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 09:05:29,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-12-22 09:05:29,840 INFO L87 Difference]: Start difference. First operand 21588 states and 30909 transitions. Second operand 8 states. [2020-12-22 09:05:34,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:05:34,527 INFO L93 Difference]: Finished difference Result 73253 states and 108502 transitions. [2020-12-22 09:05:34,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-22 09:05:34,528 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 166 [2020-12-22 09:05:34,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:05:34,605 INFO L225 Difference]: With dead ends: 73253 [2020-12-22 09:05:34,605 INFO L226 Difference]: Without dead ends: 55178 [2020-12-22 09:05:34,629 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2020-12-22 09:05:34,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55178 states. [2020-12-22 09:05:37,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55178 to 30236. [2020-12-22 09:05:37,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30236 states. [2020-12-22 09:05:37,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30236 states to 30236 states and 42873 transitions. [2020-12-22 09:05:37,313 INFO L78 Accepts]: Start accepts. Automaton has 30236 states and 42873 transitions. Word has length 166 [2020-12-22 09:05:37,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:05:37,313 INFO L481 AbstractCegarLoop]: Abstraction has 30236 states and 42873 transitions. [2020-12-22 09:05:37,313 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 09:05:37,313 INFO L276 IsEmpty]: Start isEmpty. Operand 30236 states and 42873 transitions. [2020-12-22 09:05:37,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2020-12-22 09:05:37,331 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:05:37,332 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:05:37,332 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 09:05:37,332 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:05:37,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:05:37,333 INFO L82 PathProgramCache]: Analyzing trace with hash 34755477, now seen corresponding path program 1 times [2020-12-22 09:05:37,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:05:37,333 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171924494] [2020-12-22 09:05:37,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:05:37,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:05:37,510 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 09:05:37,511 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171924494] [2020-12-22 09:05:37,511 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:05:37,511 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 09:05:37,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190917108] [2020-12-22 09:05:37,512 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 09:05:37,512 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:05:37,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 09:05:37,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 09:05:37,513 INFO L87 Difference]: Start difference. First operand 30236 states and 42873 transitions. Second operand 4 states. [2020-12-22 09:05:39,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:05:39,356 INFO L93 Difference]: Finished difference Result 49441 states and 70160 transitions. [2020-12-22 09:05:39,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 09:05:39,356 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 166 [2020-12-22 09:05:39,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:05:39,380 INFO L225 Difference]: With dead ends: 49441 [2020-12-22 09:05:39,381 INFO L226 Difference]: Without dead ends: 24293 [2020-12-22 09:05:39,397 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:05:39,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24293 states. [2020-12-22 09:05:41,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24293 to 24293. [2020-12-22 09:05:41,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24293 states. [2020-12-22 09:05:41,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24293 states to 24293 states and 34334 transitions. [2020-12-22 09:05:41,283 INFO L78 Accepts]: Start accepts. Automaton has 24293 states and 34334 transitions. Word has length 166 [2020-12-22 09:05:41,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:05:41,283 INFO L481 AbstractCegarLoop]: Abstraction has 24293 states and 34334 transitions. [2020-12-22 09:05:41,284 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 09:05:41,284 INFO L276 IsEmpty]: Start isEmpty. Operand 24293 states and 34334 transitions. [2020-12-22 09:05:41,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2020-12-22 09:05:41,293 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:05:41,294 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:05:41,294 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 09:05:41,294 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:05:41,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:05:41,295 INFO L82 PathProgramCache]: Analyzing trace with hash 506466000, now seen corresponding path program 1 times [2020-12-22 09:05:41,295 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:05:41,295 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100810520] [2020-12-22 09:05:41,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:05:41,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:05:41,381 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 09:05:41,382 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100810520] [2020-12-22 09:05:41,382 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:05:41,382 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:05:41,382 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998761509] [2020-12-22 09:05:41,383 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:05:41,383 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:05:41,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:05:41,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:05:41,384 INFO L87 Difference]: Start difference. First operand 24293 states and 34334 transitions. Second operand 3 states. [2020-12-22 09:05:43,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:05:43,920 INFO L93 Difference]: Finished difference Result 56619 states and 81032 transitions. [2020-12-22 09:05:43,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:05:43,921 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 170 [2020-12-22 09:05:43,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:05:43,966 INFO L225 Difference]: With dead ends: 56619 [2020-12-22 09:05:43,966 INFO L226 Difference]: Without dead ends: 37349 [2020-12-22 09:05:43,992 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 09:05:44,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37349 states. [2020-12-22 09:05:46,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37349 to 33179. [2020-12-22 09:05:46,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33179 states. [2020-12-22 09:05:46,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33179 states to 33179 states and 48178 transitions. [2020-12-22 09:05:46,740 INFO L78 Accepts]: Start accepts. Automaton has 33179 states and 48178 transitions. Word has length 170 [2020-12-22 09:05:46,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:05:46,741 INFO L481 AbstractCegarLoop]: Abstraction has 33179 states and 48178 transitions. [2020-12-22 09:05:46,741 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:05:46,741 INFO L276 IsEmpty]: Start isEmpty. Operand 33179 states and 48178 transitions. [2020-12-22 09:05:46,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2020-12-22 09:05:46,753 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:05:46,753 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:05:46,753 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 09:05:46,753 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:05:46,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:05:46,754 INFO L82 PathProgramCache]: Analyzing trace with hash -1601603136, now seen corresponding path program 1 times [2020-12-22 09:05:46,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:05:46,754 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65118873] [2020-12-22 09:05:46,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:05:46,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:05:46,843 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 09:05:46,844 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65118873] [2020-12-22 09:05:46,844 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:05:46,844 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:05:46,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956079053] [2020-12-22 09:05:46,845 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:05:46,845 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:05:46,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:05:46,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:05:46,846 INFO L87 Difference]: Start difference. First operand 33179 states and 48178 transitions. Second operand 3 states. [2020-12-22 09:05:51,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:05:51,169 INFO L93 Difference]: Finished difference Result 77196 states and 113127 transitions. [2020-12-22 09:05:51,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:05:51,170 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 170 [2020-12-22 09:05:51,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:05:51,240 INFO L225 Difference]: With dead ends: 77196 [2020-12-22 09:05:51,240 INFO L226 Difference]: Without dead ends: 51479 [2020-12-22 09:05:51,261 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 09:05:51,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51479 states. [2020-12-22 09:05:55,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51479 to 47669. [2020-12-22 09:05:55,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47669 states. [2020-12-22 09:05:55,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47669 states to 47669 states and 70316 transitions. [2020-12-22 09:05:55,289 INFO L78 Accepts]: Start accepts. Automaton has 47669 states and 70316 transitions. Word has length 170 [2020-12-22 09:05:55,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:05:55,290 INFO L481 AbstractCegarLoop]: Abstraction has 47669 states and 70316 transitions. [2020-12-22 09:05:55,290 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:05:55,290 INFO L276 IsEmpty]: Start isEmpty. Operand 47669 states and 70316 transitions. [2020-12-22 09:05:55,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2020-12-22 09:05:55,300 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:05:55,300 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:05:55,301 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 09:05:55,301 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:05:55,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:05:55,301 INFO L82 PathProgramCache]: Analyzing trace with hash -1460936628, now seen corresponding path program 1 times [2020-12-22 09:05:55,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:05:55,302 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567369801] [2020-12-22 09:05:55,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:05:55,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:05:55,611 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 09:05:55,611 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567369801] [2020-12-22 09:05:55,611 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:05:55,612 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 09:05:55,612 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634233342] [2020-12-22 09:05:55,612 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 09:05:55,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:05:55,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 09:05:55,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 09:05:55,613 INFO L87 Difference]: Start difference. First operand 47669 states and 70316 transitions. Second operand 4 states. [2020-12-22 09:05:58,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:05:58,576 INFO L93 Difference]: Finished difference Result 85822 states and 126479 transitions. [2020-12-22 09:05:58,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 09:05:58,577 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 171 [2020-12-22 09:05:58,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:05:58,624 INFO L225 Difference]: With dead ends: 85822 [2020-12-22 09:05:58,624 INFO L226 Difference]: Without dead ends: 38211 [2020-12-22 09:05:58,648 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:05:58,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38211 states. [2020-12-22 09:06:01,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38211 to 38211. [2020-12-22 09:06:01,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38211 states. [2020-12-22 09:06:01,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38211 states to 38211 states and 56236 transitions. [2020-12-22 09:06:01,897 INFO L78 Accepts]: Start accepts. Automaton has 38211 states and 56236 transitions. Word has length 171 [2020-12-22 09:06:01,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:06:01,898 INFO L481 AbstractCegarLoop]: Abstraction has 38211 states and 56236 transitions. [2020-12-22 09:06:01,898 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 09:06:01,898 INFO L276 IsEmpty]: Start isEmpty. Operand 38211 states and 56236 transitions. [2020-12-22 09:06:01,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2020-12-22 09:06:01,907 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:06:01,907 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:06:01,908 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 09:06:01,908 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:06:01,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:06:01,908 INFO L82 PathProgramCache]: Analyzing trace with hash 1811794915, now seen corresponding path program 1 times [2020-12-22 09:06:01,908 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:06:01,909 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981542436] [2020-12-22 09:06:01,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:06:01,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:06:02,245 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 09:06:02,245 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981542436] [2020-12-22 09:06:02,246 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:06:02,246 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:06:02,249 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536791727] [2020-12-22 09:06:02,251 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:06:02,252 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:06:02,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:06:02,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:06:02,253 INFO L87 Difference]: Start difference. First operand 38211 states and 56236 transitions. Second operand 6 states. [2020-12-22 09:06:10,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:06:10,601 INFO L93 Difference]: Finished difference Result 137551 states and 204913 transitions. [2020-12-22 09:06:10,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 09:06:10,602 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 176 [2020-12-22 09:06:10,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:06:10,754 INFO L225 Difference]: With dead ends: 137551 [2020-12-22 09:06:10,754 INFO L226 Difference]: Without dead ends: 103715 [2020-12-22 09:06:10,791 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2020-12-22 09:06:10,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103715 states. [2020-12-22 09:06:19,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103715 to 103711. [2020-12-22 09:06:19,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103711 states. [2020-12-22 09:06:19,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103711 states to 103711 states and 154329 transitions. [2020-12-22 09:06:19,715 INFO L78 Accepts]: Start accepts. Automaton has 103711 states and 154329 transitions. Word has length 176 [2020-12-22 09:06:19,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:06:19,715 INFO L481 AbstractCegarLoop]: Abstraction has 103711 states and 154329 transitions. [2020-12-22 09:06:19,715 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:06:19,715 INFO L276 IsEmpty]: Start isEmpty. Operand 103711 states and 154329 transitions. [2020-12-22 09:06:19,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2020-12-22 09:06:19,735 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:06:19,735 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:06:19,736 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 09:06:19,736 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:06:19,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:06:19,736 INFO L82 PathProgramCache]: Analyzing trace with hash -1034070136, now seen corresponding path program 1 times [2020-12-22 09:06:19,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:06:19,737 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872650425] [2020-12-22 09:06:19,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:06:19,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:06:19,960 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 09:06:19,961 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872650425] [2020-12-22 09:06:19,961 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:06:19,961 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:06:19,961 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766228790] [2020-12-22 09:06:19,962 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:06:19,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:06:19,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:06:19,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:06:19,963 INFO L87 Difference]: Start difference. First operand 103711 states and 154329 transitions. Second operand 5 states. [2020-12-22 09:06:28,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:06:28,550 INFO L93 Difference]: Finished difference Result 199449 states and 296800 transitions. [2020-12-22 09:06:28,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 09:06:28,551 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 176 [2020-12-22 09:06:28,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:06:28,841 INFO L225 Difference]: With dead ends: 199449 [2020-12-22 09:06:28,841 INFO L226 Difference]: Without dead ends: 95988 [2020-12-22 09:06:28,909 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:06:28,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95988 states. [2020-12-22 09:06:37,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95988 to 95946. [2020-12-22 09:06:37,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95946 states. [2020-12-22 09:06:37,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95946 states to 95946 states and 142705 transitions. [2020-12-22 09:06:37,223 INFO L78 Accepts]: Start accepts. Automaton has 95946 states and 142705 transitions. Word has length 176 [2020-12-22 09:06:37,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:06:37,223 INFO L481 AbstractCegarLoop]: Abstraction has 95946 states and 142705 transitions. [2020-12-22 09:06:37,223 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:06:37,223 INFO L276 IsEmpty]: Start isEmpty. Operand 95946 states and 142705 transitions. [2020-12-22 09:06:37,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2020-12-22 09:06:37,237 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:06:37,237 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:06:37,237 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 09:06:37,237 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:06:37,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:06:37,238 INFO L82 PathProgramCache]: Analyzing trace with hash 1116650265, now seen corresponding path program 1 times [2020-12-22 09:06:37,238 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:06:37,238 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342997997] [2020-12-22 09:06:37,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:06:37,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:06:37,426 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 09:06:37,426 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342997997] [2020-12-22 09:06:37,426 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:06:37,426 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 09:06:37,427 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137690292] [2020-12-22 09:06:37,427 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 09:06:37,427 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:06:37,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 09:06:37,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 09:06:37,428 INFO L87 Difference]: Start difference. First operand 95946 states and 142705 transitions. Second operand 4 states. [2020-12-22 09:06:46,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:06:46,120 INFO L93 Difference]: Finished difference Result 192038 states and 285562 transitions. [2020-12-22 09:06:46,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 09:06:46,121 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 178 [2020-12-22 09:06:46,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:06:46,263 INFO L225 Difference]: With dead ends: 192038 [2020-12-22 09:06:46,263 INFO L226 Difference]: Without dead ends: 96354 [2020-12-22 09:06:46,336 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:06:46,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96354 states. [2020-12-22 09:06:54,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96354 to 96197. [2020-12-22 09:06:54,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96197 states. [2020-12-22 09:06:55,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96197 states to 96197 states and 142959 transitions. [2020-12-22 09:06:55,268 INFO L78 Accepts]: Start accepts. Automaton has 96197 states and 142959 transitions. Word has length 178 [2020-12-22 09:06:55,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:06:55,269 INFO L481 AbstractCegarLoop]: Abstraction has 96197 states and 142959 transitions. [2020-12-22 09:06:55,269 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 09:06:55,269 INFO L276 IsEmpty]: Start isEmpty. Operand 96197 states and 142959 transitions. [2020-12-22 09:06:55,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2020-12-22 09:06:55,288 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:06:55,288 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:06:55,288 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-12-22 09:06:55,288 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:06:55,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:06:55,289 INFO L82 PathProgramCache]: Analyzing trace with hash -1253362275, now seen corresponding path program 1 times [2020-12-22 09:06:55,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:06:55,289 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961051429] [2020-12-22 09:06:55,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:06:55,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:06:55,499 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 09:06:55,500 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961051429] [2020-12-22 09:06:55,500 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:06:55,500 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 09:06:55,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214823976] [2020-12-22 09:06:55,501 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 09:06:55,501 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:06:55,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 09:06:55,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 09:06:55,502 INFO L87 Difference]: Start difference. First operand 96197 states and 142959 transitions. Second operand 4 states. [2020-12-22 09:07:03,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:07:03,248 INFO L93 Difference]: Finished difference Result 145458 states and 215897 transitions. [2020-12-22 09:07:03,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 09:07:03,248 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 178 [2020-12-22 09:07:03,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:07:03,388 INFO L225 Difference]: With dead ends: 145458 [2020-12-22 09:07:03,388 INFO L226 Difference]: Without dead ends: 87037 [2020-12-22 09:07:03,441 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:07:03,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87037 states.