/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.3.3.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 09:03:23,054 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 09:03:23,057 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 09:03:23,119 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 09:03:23,119 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 09:03:23,123 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 09:03:23,127 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 09:03:23,144 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 09:03:23,147 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 09:03:23,154 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 09:03:23,155 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 09:03:23,157 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 09:03:23,157 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 09:03:23,160 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 09:03:23,161 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 09:03:23,163 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 09:03:23,164 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 09:03:23,168 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 09:03:23,175 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 09:03:23,178 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 09:03:23,183 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 09:03:23,185 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 09:03:23,187 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 09:03:23,188 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 09:03:23,191 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 09:03:23,206 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 09:03:23,206 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 09:03:23,207 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 09:03:23,208 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 09:03:23,255 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 09:03:23,256 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 09:03:23,261 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 09:03:23,261 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 09:03:23,261 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 09:03:23,261 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 09:03:23,262 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 09:03:23,262 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 09:03:23,262 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 09:03:23,262 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 09:03:23,263 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 09:03:23,264 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 09:03:23,264 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 09:03:23,264 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 09:03:23,264 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 09:03:23,264 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 09:03:23,265 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 09:03:23,265 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 09:03:23,265 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 09:03:23,265 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 09:03:23,265 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 09:03:23,266 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 09:03:23,266 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 09:03:23,266 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 09:03:23,266 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 09:03:23,266 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 09:03:23,641 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 09:03:23,677 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 09:03:23,680 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 09:03:23,682 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 09:03:23,682 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 09:03:23,683 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.3.3.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-12-22 09:03:23,771 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/86a90dd49/c98f2a3caf7b4437a11c5130896d5fd0/FLAG1b15c148a [2020-12-22 09:03:24,399 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 09:03:24,399 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.3.3.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-12-22 09:03:24,417 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/86a90dd49/c98f2a3caf7b4437a11c5130896d5fd0/FLAG1b15c148a [2020-12-22 09:03:24,647 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/86a90dd49/c98f2a3caf7b4437a11c5130896d5fd0 [2020-12-22 09:03:24,650 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 09:03:24,652 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 09:03:24,654 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 09:03:24,654 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 09:03:24,658 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 09:03:24,658 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 09:03:24" (1/1) ... [2020-12-22 09:03:24,660 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@266203ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:03:24, skipping insertion in model container [2020-12-22 09:03:24,660 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 09:03:24" (1/1) ... [2020-12-22 09:03:24,670 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 09:03:24,740 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 09:03:24,979 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.3.3.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[7516,7529] [2020-12-22 09:03:25,052 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 09:03:25,077 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 09:03:25,200 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.3.3.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[7516,7529] [2020-12-22 09:03:25,239 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 09:03:25,270 INFO L208 MainTranslator]: Completed translation [2020-12-22 09:03:25,271 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:03:25 WrapperNode [2020-12-22 09:03:25,271 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 09:03:25,272 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 09:03:25,273 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 09:03:25,273 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 09:03:25,279 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:03:25" (1/1) ... [2020-12-22 09:03:25,292 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:03:25" (1/1) ... [2020-12-22 09:03:25,344 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 09:03:25,345 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 09:03:25,346 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 09:03:25,346 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 09:03:25,361 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:03:25" (1/1) ... [2020-12-22 09:03:25,361 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:03:25" (1/1) ... [2020-12-22 09:03:25,373 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:03:25" (1/1) ... [2020-12-22 09:03:25,374 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:03:25" (1/1) ... [2020-12-22 09:03:25,396 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:03:25" (1/1) ... [2020-12-22 09:03:25,411 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:03:25" (1/1) ... [2020-12-22 09:03:25,419 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:03:25" (1/1) ... [2020-12-22 09:03:25,427 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 09:03:25,430 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 09:03:25,430 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 09:03:25,430 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 09:03:25,432 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:03:25" (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 09:03:25,513 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 09:03:25,513 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 09:03:25,514 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 09:03:25,514 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 09:03:26,448 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 09:03:26,449 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2020-12-22 09:03:26,452 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 09:03:26 BoogieIcfgContainer [2020-12-22 09:03:26,453 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 09:03:26,454 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 09:03:26,455 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 09:03:26,459 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 09:03:26,460 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 09:03:24" (1/3) ... [2020-12-22 09:03:26,461 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@94a8add and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 09:03:26, skipping insertion in model container [2020-12-22 09:03:26,461 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:03:25" (2/3) ... [2020-12-22 09:03:26,462 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@94a8add and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 09:03:26, skipping insertion in model container [2020-12-22 09:03:26,462 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 09:03:26" (3/3) ... [2020-12-22 09:03:26,464 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.3.3.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-12-22 09:03:26,475 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 09:03:26,481 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 09:03:26,500 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 09:03:26,528 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 09:03:26,528 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 09:03:26,528 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 09:03:26,529 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 09:03:26,529 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 09:03:26,529 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 09:03:26,529 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 09:03:26,529 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 09:03:26,551 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states. [2020-12-22 09:03:26,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-12-22 09:03:26,561 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:03:26,562 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] [2020-12-22 09:03:26,562 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:03:26,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:03:26,569 INFO L82 PathProgramCache]: Analyzing trace with hash -1975649421, now seen corresponding path program 1 times [2020-12-22 09:03:26,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:03:26,585 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73100319] [2020-12-22 09:03:26,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:03:26,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:03:27,012 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 09:03:27,013 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73100319] [2020-12-22 09:03:27,014 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:03:27,014 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:03:27,015 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288741681] [2020-12-22 09:03:27,021 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:03:27,021 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:03:27,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:03:27,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:03:27,048 INFO L87 Difference]: Start difference. First operand 155 states. Second operand 3 states. [2020-12-22 09:03:27,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:03:27,256 INFO L93 Difference]: Finished difference Result 341 states and 571 transitions. [2020-12-22 09:03:27,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:03:27,258 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 62 [2020-12-22 09:03:27,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:03:27,291 INFO L225 Difference]: With dead ends: 341 [2020-12-22 09:03:27,291 INFO L226 Difference]: Without dead ends: 237 [2020-12-22 09:03:27,295 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 09:03:27,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2020-12-22 09:03:27,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 234. [2020-12-22 09:03:27,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 234 states. [2020-12-22 09:03:27,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 365 transitions. [2020-12-22 09:03:27,388 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 365 transitions. Word has length 62 [2020-12-22 09:03:27,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:03:27,389 INFO L481 AbstractCegarLoop]: Abstraction has 234 states and 365 transitions. [2020-12-22 09:03:27,389 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:03:27,389 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 365 transitions. [2020-12-22 09:03:27,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 09:03:27,397 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:03:27,397 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:03:27,398 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 09:03:27,398 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:03:27,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:03:27,400 INFO L82 PathProgramCache]: Analyzing trace with hash 1826541876, now seen corresponding path program 1 times [2020-12-22 09:03:27,400 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:03:27,400 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168453276] [2020-12-22 09:03:27,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:03:27,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:03:27,585 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 09:03:27,586 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168453276] [2020-12-22 09:03:27,586 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:03:27,586 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:03:27,587 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532516697] [2020-12-22 09:03:27,589 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:03:27,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:03:27,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:03:27,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:03:27,591 INFO L87 Difference]: Start difference. First operand 234 states and 365 transitions. Second operand 3 states. [2020-12-22 09:03:27,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:03:27,695 INFO L93 Difference]: Finished difference Result 572 states and 917 transitions. [2020-12-22 09:03:27,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:03:27,696 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 64 [2020-12-22 09:03:27,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:03:27,700 INFO L225 Difference]: With dead ends: 572 [2020-12-22 09:03:27,700 INFO L226 Difference]: Without dead ends: 395 [2020-12-22 09:03:27,705 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 09:03:27,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2020-12-22 09:03:27,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 391. [2020-12-22 09:03:27,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 391 states. [2020-12-22 09:03:27,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 620 transitions. [2020-12-22 09:03:27,761 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 620 transitions. Word has length 64 [2020-12-22 09:03:27,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:03:27,761 INFO L481 AbstractCegarLoop]: Abstraction has 391 states and 620 transitions. [2020-12-22 09:03:27,762 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:03:27,762 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 620 transitions. [2020-12-22 09:03:27,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 09:03:27,769 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:03:27,769 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:03:27,769 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 09:03:27,769 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:03:27,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:03:27,770 INFO L82 PathProgramCache]: Analyzing trace with hash -1385775307, now seen corresponding path program 1 times [2020-12-22 09:03:27,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:03:27,771 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710022747] [2020-12-22 09:03:27,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:03:27,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:03:27,867 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 09:03:27,868 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710022747] [2020-12-22 09:03:27,868 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:03:27,868 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:03:27,868 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421617363] [2020-12-22 09:03:27,869 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:03:27,869 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:03:27,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:03:27,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:03:27,870 INFO L87 Difference]: Start difference. First operand 391 states and 620 transitions. Second operand 3 states. [2020-12-22 09:03:27,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:03:27,927 INFO L93 Difference]: Finished difference Result 1027 states and 1654 transitions. [2020-12-22 09:03:27,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:03:27,927 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 66 [2020-12-22 09:03:27,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:03:27,932 INFO L225 Difference]: With dead ends: 1027 [2020-12-22 09:03:27,932 INFO L226 Difference]: Without dead ends: 693 [2020-12-22 09:03:27,934 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 09:03:27,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 693 states. [2020-12-22 09:03:27,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 693 to 687. [2020-12-22 09:03:27,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 687 states. [2020-12-22 09:03:27,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 687 states to 687 states and 1096 transitions. [2020-12-22 09:03:27,982 INFO L78 Accepts]: Start accepts. Automaton has 687 states and 1096 transitions. Word has length 66 [2020-12-22 09:03:27,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:03:27,983 INFO L481 AbstractCegarLoop]: Abstraction has 687 states and 1096 transitions. [2020-12-22 09:03:27,983 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:03:27,983 INFO L276 IsEmpty]: Start isEmpty. Operand 687 states and 1096 transitions. [2020-12-22 09:03:27,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-12-22 09:03:27,986 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:03:27,986 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] [2020-12-22 09:03:27,986 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 09:03:27,986 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:03:27,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:03:27,987 INFO L82 PathProgramCache]: Analyzing trace with hash -190660810, now seen corresponding path program 1 times [2020-12-22 09:03:27,987 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:03:27,987 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31495914] [2020-12-22 09:03:27,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:03:28,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:03:28,169 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 09:03:28,169 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31495914] [2020-12-22 09:03:28,169 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:03:28,170 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:03:28,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641750124] [2020-12-22 09:03:28,174 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:03:28,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:03:28,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:03:28,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:03:28,175 INFO L87 Difference]: Start difference. First operand 687 states and 1096 transitions. Second operand 5 states. [2020-12-22 09:03:28,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:03:28,496 INFO L93 Difference]: Finished difference Result 2979 states and 4854 transitions. [2020-12-22 09:03:28,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 09:03:28,497 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 68 [2020-12-22 09:03:28,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:03:28,511 INFO L225 Difference]: With dead ends: 2979 [2020-12-22 09:03:28,512 INFO L226 Difference]: Without dead ends: 2349 [2020-12-22 09:03:28,514 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-12-22 09:03:28,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2349 states. [2020-12-22 09:03:28,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2349 to 1239. [2020-12-22 09:03:28,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1239 states. [2020-12-22 09:03:28,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1239 states to 1239 states and 1991 transitions. [2020-12-22 09:03:28,611 INFO L78 Accepts]: Start accepts. Automaton has 1239 states and 1991 transitions. Word has length 68 [2020-12-22 09:03:28,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:03:28,612 INFO L481 AbstractCegarLoop]: Abstraction has 1239 states and 1991 transitions. [2020-12-22 09:03:28,612 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:03:28,612 INFO L276 IsEmpty]: Start isEmpty. Operand 1239 states and 1991 transitions. [2020-12-22 09:03:28,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-12-22 09:03:28,614 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:03:28,614 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] [2020-12-22 09:03:28,614 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 09:03:28,614 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:03:28,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:03:28,615 INFO L82 PathProgramCache]: Analyzing trace with hash -1678021987, now seen corresponding path program 1 times [2020-12-22 09:03:28,615 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:03:28,615 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926104382] [2020-12-22 09:03:28,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:03:28,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:03:28,754 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 09:03:28,754 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926104382] [2020-12-22 09:03:28,754 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:03:28,754 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 09:03:28,755 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210517982] [2020-12-22 09:03:28,755 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 09:03:28,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:03:28,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 09:03:28,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 09:03:28,758 INFO L87 Difference]: Start difference. First operand 1239 states and 1991 transitions. Second operand 4 states. [2020-12-22 09:03:29,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:03:29,008 INFO L93 Difference]: Finished difference Result 3619 states and 5887 transitions. [2020-12-22 09:03:29,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 09:03:29,009 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 69 [2020-12-22 09:03:29,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:03:29,024 INFO L225 Difference]: With dead ends: 3619 [2020-12-22 09:03:29,024 INFO L226 Difference]: Without dead ends: 2437 [2020-12-22 09:03:29,027 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 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 09:03:29,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2437 states. [2020-12-22 09:03:29,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2437 to 1829. [2020-12-22 09:03:29,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1829 states. [2020-12-22 09:03:29,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1829 states to 1829 states and 2952 transitions. [2020-12-22 09:03:29,160 INFO L78 Accepts]: Start accepts. Automaton has 1829 states and 2952 transitions. Word has length 69 [2020-12-22 09:03:29,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:03:29,161 INFO L481 AbstractCegarLoop]: Abstraction has 1829 states and 2952 transitions. [2020-12-22 09:03:29,161 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 09:03:29,161 INFO L276 IsEmpty]: Start isEmpty. Operand 1829 states and 2952 transitions. [2020-12-22 09:03:29,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-12-22 09:03:29,163 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:03:29,164 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] [2020-12-22 09:03:29,164 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 09:03:29,164 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:03:29,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:03:29,165 INFO L82 PathProgramCache]: Analyzing trace with hash -537020195, now seen corresponding path program 1 times [2020-12-22 09:03:29,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:03:29,165 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270706879] [2020-12-22 09:03:29,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:03:29,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:03:29,276 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 09:03:29,276 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270706879] [2020-12-22 09:03:29,276 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:03:29,277 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 09:03:29,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570637545] [2020-12-22 09:03:29,277 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 09:03:29,278 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:03:29,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 09:03:29,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 09:03:29,279 INFO L87 Difference]: Start difference. First operand 1829 states and 2952 transitions. Second operand 4 states. [2020-12-22 09:03:29,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:03:29,569 INFO L93 Difference]: Finished difference Result 5465 states and 8877 transitions. [2020-12-22 09:03:29,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 09:03:29,569 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 70 [2020-12-22 09:03:29,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:03:29,589 INFO L225 Difference]: With dead ends: 5465 [2020-12-22 09:03:29,590 INFO L226 Difference]: Without dead ends: 3693 [2020-12-22 09:03:29,593 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 09:03:29,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3693 states. [2020-12-22 09:03:29,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3693 to 2673. [2020-12-22 09:03:29,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2673 states. [2020-12-22 09:03:29,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2673 states to 2673 states and 4312 transitions. [2020-12-22 09:03:29,818 INFO L78 Accepts]: Start accepts. Automaton has 2673 states and 4312 transitions. Word has length 70 [2020-12-22 09:03:29,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:03:29,818 INFO L481 AbstractCegarLoop]: Abstraction has 2673 states and 4312 transitions. [2020-12-22 09:03:29,818 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 09:03:29,818 INFO L276 IsEmpty]: Start isEmpty. Operand 2673 states and 4312 transitions. [2020-12-22 09:03:29,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-12-22 09:03:29,821 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:03:29,821 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] [2020-12-22 09:03:29,821 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 09:03:29,822 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:03:29,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:03:29,822 INFO L82 PathProgramCache]: Analyzing trace with hash 478855012, now seen corresponding path program 1 times [2020-12-22 09:03:29,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:03:29,827 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764118238] [2020-12-22 09:03:29,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:03:29,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:03:29,913 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 09:03:29,913 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764118238] [2020-12-22 09:03:29,914 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:03:29,915 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 09:03:29,916 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3228183] [2020-12-22 09:03:29,916 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 09:03:29,916 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:03:29,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 09:03:29,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 09:03:29,928 INFO L87 Difference]: Start difference. First operand 2673 states and 4312 transitions. Second operand 4 states. [2020-12-22 09:03:30,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:03:30,318 INFO L93 Difference]: Finished difference Result 7713 states and 12507 transitions. [2020-12-22 09:03:30,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 09:03:30,319 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 71 [2020-12-22 09:03:30,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:03:30,344 INFO L225 Difference]: With dead ends: 7713 [2020-12-22 09:03:30,344 INFO L226 Difference]: Without dead ends: 5097 [2020-12-22 09:03:30,349 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 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 09:03:30,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5097 states. [2020-12-22 09:03:30,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5097 to 3869. [2020-12-22 09:03:30,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3869 states. [2020-12-22 09:03:30,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3869 states to 3869 states and 6234 transitions. [2020-12-22 09:03:30,628 INFO L78 Accepts]: Start accepts. Automaton has 3869 states and 6234 transitions. Word has length 71 [2020-12-22 09:03:30,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:03:30,629 INFO L481 AbstractCegarLoop]: Abstraction has 3869 states and 6234 transitions. [2020-12-22 09:03:30,629 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 09:03:30,629 INFO L276 IsEmpty]: Start isEmpty. Operand 3869 states and 6234 transitions. [2020-12-22 09:03:30,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-12-22 09:03:30,637 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:03:30,637 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] [2020-12-22 09:03:30,637 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 09:03:30,637 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:03:30,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:03:30,638 INFO L82 PathProgramCache]: Analyzing trace with hash -32382329, now seen corresponding path program 1 times [2020-12-22 09:03:30,638 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:03:30,638 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728142229] [2020-12-22 09:03:30,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:03:30,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:03:30,699 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 09:03:30,699 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728142229] [2020-12-22 09:03:30,700 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:03:30,700 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:03:30,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117005346] [2020-12-22 09:03:30,700 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:03:30,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:03:30,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:03:30,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:03:30,701 INFO L87 Difference]: Start difference. First operand 3869 states and 6234 transitions. Second operand 3 states. [2020-12-22 09:03:31,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:03:31,030 INFO L93 Difference]: Finished difference Result 8646 states and 14040 transitions. [2020-12-22 09:03:31,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:03:31,030 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 72 [2020-12-22 09:03:31,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:03:31,061 INFO L225 Difference]: With dead ends: 8646 [2020-12-22 09:03:31,061 INFO L226 Difference]: Without dead ends: 5881 [2020-12-22 09:03:31,068 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 09:03:31,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5881 states. [2020-12-22 09:03:31,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5881 to 5879. [2020-12-22 09:03:31,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5879 states. [2020-12-22 09:03:31,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5879 states to 5879 states and 9478 transitions. [2020-12-22 09:03:31,448 INFO L78 Accepts]: Start accepts. Automaton has 5879 states and 9478 transitions. Word has length 72 [2020-12-22 09:03:31,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:03:31,448 INFO L481 AbstractCegarLoop]: Abstraction has 5879 states and 9478 transitions. [2020-12-22 09:03:31,448 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:03:31,448 INFO L276 IsEmpty]: Start isEmpty. Operand 5879 states and 9478 transitions. [2020-12-22 09:03:31,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-12-22 09:03:31,449 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:03:31,450 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] [2020-12-22 09:03:31,450 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 09:03:31,450 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:03:31,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:03:31,451 INFO L82 PathProgramCache]: Analyzing trace with hash -1419254461, now seen corresponding path program 1 times [2020-12-22 09:03:31,451 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:03:31,452 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251104790] [2020-12-22 09:03:31,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:03:31,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:03:31,546 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 09:03:31,546 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251104790] [2020-12-22 09:03:31,546 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:03:31,547 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:03:31,547 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875067050] [2020-12-22 09:03:31,547 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:03:31,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:03:31,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:03:31,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:03:31,549 INFO L87 Difference]: Start difference. First operand 5879 states and 9478 transitions. Second operand 3 states. [2020-12-22 09:03:32,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:03:32,101 INFO L93 Difference]: Finished difference Result 12993 states and 20995 transitions. [2020-12-22 09:03:32,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:03:32,102 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 72 [2020-12-22 09:03:32,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:03:32,149 INFO L225 Difference]: With dead ends: 12993 [2020-12-22 09:03:32,149 INFO L226 Difference]: Without dead ends: 8823 [2020-12-22 09:03:32,157 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 09:03:32,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8823 states. [2020-12-22 09:03:32,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8823 to 8821. [2020-12-22 09:03:32,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8821 states. [2020-12-22 09:03:32,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8821 states to 8821 states and 14158 transitions. [2020-12-22 09:03:32,769 INFO L78 Accepts]: Start accepts. Automaton has 8821 states and 14158 transitions. Word has length 72 [2020-12-22 09:03:32,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:03:32,770 INFO L481 AbstractCegarLoop]: Abstraction has 8821 states and 14158 transitions. [2020-12-22 09:03:32,770 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:03:32,770 INFO L276 IsEmpty]: Start isEmpty. Operand 8821 states and 14158 transitions. [2020-12-22 09:03:32,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-12-22 09:03:32,771 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:03:32,771 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] [2020-12-22 09:03:32,771 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 09:03:32,772 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:03:32,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:03:32,773 INFO L82 PathProgramCache]: Analyzing trace with hash 569279253, now seen corresponding path program 1 times [2020-12-22 09:03:32,774 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:03:32,774 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275012487] [2020-12-22 09:03:32,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:03:32,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:03:32,827 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:03:32,827 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275012487] [2020-12-22 09:03:32,828 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:03:32,828 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:03:32,828 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063630656] [2020-12-22 09:03:32,828 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:03:32,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:03:32,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:03:32,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:03:32,833 INFO L87 Difference]: Start difference. First operand 8821 states and 14158 transitions. Second operand 3 states. [2020-12-22 09:03:33,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:03:33,629 INFO L93 Difference]: Finished difference Result 19170 states and 30844 transitions. [2020-12-22 09:03:33,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:03:33,630 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 72 [2020-12-22 09:03:33,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:03:33,667 INFO L225 Difference]: With dead ends: 19170 [2020-12-22 09:03:33,668 INFO L226 Difference]: Without dead ends: 12906 [2020-12-22 09:03:33,682 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 09:03:33,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12906 states. [2020-12-22 09:03:34,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12906 to 12904. [2020-12-22 09:03:34,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12904 states. [2020-12-22 09:03:34,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12904 states to 12904 states and 20605 transitions. [2020-12-22 09:03:34,476 INFO L78 Accepts]: Start accepts. Automaton has 12904 states and 20605 transitions. Word has length 72 [2020-12-22 09:03:34,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:03:34,477 INFO L481 AbstractCegarLoop]: Abstraction has 12904 states and 20605 transitions. [2020-12-22 09:03:34,477 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:03:34,477 INFO L276 IsEmpty]: Start isEmpty. Operand 12904 states and 20605 transitions. [2020-12-22 09:03:34,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-12-22 09:03:34,478 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:03:34,478 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] [2020-12-22 09:03:34,478 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 09:03:34,479 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:03:34,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:03:34,479 INFO L82 PathProgramCache]: Analyzing trace with hash -899144939, now seen corresponding path program 1 times [2020-12-22 09:03:34,480 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:03:34,480 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186504282] [2020-12-22 09:03:34,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:03:34,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:03:34,586 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 09:03:34,586 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186504282] [2020-12-22 09:03:34,586 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:03:34,587 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 09:03:34,587 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405598580] [2020-12-22 09:03:34,587 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 09:03:34,587 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:03:34,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 09:03:34,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 09:03:34,588 INFO L87 Difference]: Start difference. First operand 12904 states and 20605 transitions. Second operand 4 states. [2020-12-22 09:03:35,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:03:35,826 INFO L93 Difference]: Finished difference Result 37941 states and 60544 transitions. [2020-12-22 09:03:35,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 09:03:35,827 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 73 [2020-12-22 09:03:35,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:03:35,892 INFO L225 Difference]: With dead ends: 37941 [2020-12-22 09:03:35,893 INFO L226 Difference]: Without dead ends: 25046 [2020-12-22 09:03:35,925 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 09:03:35,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25046 states. [2020-12-22 09:03:37,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25046 to 25044. [2020-12-22 09:03:37,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25044 states. [2020-12-22 09:03:37,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25044 states to 25044 states and 39727 transitions. [2020-12-22 09:03:37,646 INFO L78 Accepts]: Start accepts. Automaton has 25044 states and 39727 transitions. Word has length 73 [2020-12-22 09:03:37,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:03:37,646 INFO L481 AbstractCegarLoop]: Abstraction has 25044 states and 39727 transitions. [2020-12-22 09:03:37,646 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 09:03:37,646 INFO L276 IsEmpty]: Start isEmpty. Operand 25044 states and 39727 transitions. [2020-12-22 09:03:37,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-12-22 09:03:37,647 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:03:37,647 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] [2020-12-22 09:03:37,648 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 09:03:37,648 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:03:37,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:03:37,648 INFO L82 PathProgramCache]: Analyzing trace with hash -1735035679, now seen corresponding path program 1 times [2020-12-22 09:03:37,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:03:37,649 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409158042] [2020-12-22 09:03:37,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:03:37,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:03:37,681 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 09:03:37,681 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409158042] [2020-12-22 09:03:37,681 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:03:37,681 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:03:37,682 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714640601] [2020-12-22 09:03:37,682 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:03:37,682 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:03:37,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:03:37,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:03:37,683 INFO L87 Difference]: Start difference. First operand 25044 states and 39727 transitions. Second operand 3 states. [2020-12-22 09:03:39,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:03:39,808 INFO L93 Difference]: Finished difference Result 75094 states and 119119 transitions. [2020-12-22 09:03:39,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:03:39,809 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 74 [2020-12-22 09:03:39,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:03:39,938 INFO L225 Difference]: With dead ends: 75094 [2020-12-22 09:03:39,938 INFO L226 Difference]: Without dead ends: 50078 [2020-12-22 09:03:39,984 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 09:03:40,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50078 states. [2020-12-22 09:03:41,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50078 to 25046. [2020-12-22 09:03:41,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25046 states. [2020-12-22 09:03:41,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25046 states to 25046 states and 39729 transitions. [2020-12-22 09:03:41,959 INFO L78 Accepts]: Start accepts. Automaton has 25046 states and 39729 transitions. Word has length 74 [2020-12-22 09:03:41,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:03:41,960 INFO L481 AbstractCegarLoop]: Abstraction has 25046 states and 39729 transitions. [2020-12-22 09:03:41,960 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:03:41,960 INFO L276 IsEmpty]: Start isEmpty. Operand 25046 states and 39729 transitions. [2020-12-22 09:03:41,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-12-22 09:03:41,964 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:03:41,965 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] [2020-12-22 09:03:41,965 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 09:03:41,965 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:03:41,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:03:41,965 INFO L82 PathProgramCache]: Analyzing trace with hash -1282212699, now seen corresponding path program 1 times [2020-12-22 09:03:41,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:03:41,966 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840865679] [2020-12-22 09:03:41,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:03:41,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:03:42,019 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 09:03:42,020 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840865679] [2020-12-22 09:03:42,020 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:03:42,020 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:03:42,020 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339645048] [2020-12-22 09:03:42,021 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:03:42,021 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:03:42,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:03:42,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:03:42,022 INFO L87 Difference]: Start difference. First operand 25046 states and 39729 transitions. Second operand 3 states. [2020-12-22 09:03:43,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:03:43,811 INFO L93 Difference]: Finished difference Result 60529 states and 96542 transitions. [2020-12-22 09:03:43,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:03:43,811 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 74 [2020-12-22 09:03:43,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:03:43,893 INFO L225 Difference]: With dead ends: 60529 [2020-12-22 09:03:43,893 INFO L226 Difference]: Without dead ends: 35612 [2020-12-22 09:03:43,928 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 09:03:43,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35612 states. [2020-12-22 09:03:46,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35612 to 34336. [2020-12-22 09:03:46,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34336 states. [2020-12-22 09:03:46,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34336 states to 34336 states and 54396 transitions. [2020-12-22 09:03:46,331 INFO L78 Accepts]: Start accepts. Automaton has 34336 states and 54396 transitions. Word has length 74 [2020-12-22 09:03:46,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:03:46,331 INFO L481 AbstractCegarLoop]: Abstraction has 34336 states and 54396 transitions. [2020-12-22 09:03:46,331 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:03:46,332 INFO L276 IsEmpty]: Start isEmpty. Operand 34336 states and 54396 transitions. [2020-12-22 09:03:46,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-12-22 09:03:46,337 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:03:46,337 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] [2020-12-22 09:03:46,337 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 09:03:46,337 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:03:46,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:03:46,338 INFO L82 PathProgramCache]: Analyzing trace with hash 1471377814, now seen corresponding path program 1 times [2020-12-22 09:03:46,338 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:03:46,338 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338350698] [2020-12-22 09:03:46,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:03:46,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:03:46,424 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 09:03:46,425 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338350698] [2020-12-22 09:03:46,425 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:03:46,425 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:03:46,425 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995996983] [2020-12-22 09:03:46,426 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:03:46,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:03:46,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:03:46,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:03:46,427 INFO L87 Difference]: Start difference. First operand 34336 states and 54396 transitions. Second operand 3 states. [2020-12-22 09:03:50,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:03:50,196 INFO L93 Difference]: Finished difference Result 100709 states and 159458 transitions. [2020-12-22 09:03:50,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:03:50,197 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 75 [2020-12-22 09:03:50,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:03:50,315 INFO L225 Difference]: With dead ends: 100709 [2020-12-22 09:03:50,316 INFO L226 Difference]: Without dead ends: 66546 [2020-12-22 09:03:50,355 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 09:03:50,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66546 states. [2020-12-22 09:03:54,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66546 to 66544. [2020-12-22 09:03:54,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66544 states. [2020-12-22 09:03:54,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66544 states to 66544 states and 104661 transitions. [2020-12-22 09:03:54,446 INFO L78 Accepts]: Start accepts. Automaton has 66544 states and 104661 transitions. Word has length 75 [2020-12-22 09:03:54,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:03:54,446 INFO L481 AbstractCegarLoop]: Abstraction has 66544 states and 104661 transitions. [2020-12-22 09:03:54,446 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:03:54,447 INFO L276 IsEmpty]: Start isEmpty. Operand 66544 states and 104661 transitions. [2020-12-22 09:03:54,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-12-22 09:03:54,448 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:03:54,448 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] [2020-12-22 09:03:54,448 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 09:03:54,448 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:03:54,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:03:54,448 INFO L82 PathProgramCache]: Analyzing trace with hash 20351833, now seen corresponding path program 1 times [2020-12-22 09:03:54,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:03:54,449 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176457090] [2020-12-22 09:03:54,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:03:54,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:03:54,552 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 09:03:54,553 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176457090] [2020-12-22 09:03:54,553 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:03:54,553 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:03:54,554 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235965469] [2020-12-22 09:03:54,554 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:03:54,554 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:03:54,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:03:54,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:03:54,555 INFO L87 Difference]: Start difference. First operand 66544 states and 104661 transitions. Second operand 5 states. [2020-12-22 09:04:01,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:04:01,608 INFO L93 Difference]: Finished difference Result 187298 states and 294406 transitions. [2020-12-22 09:04:01,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 09:04:01,609 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 75 [2020-12-22 09:04:01,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:04:01,854 INFO L225 Difference]: With dead ends: 187298 [2020-12-22 09:04:01,854 INFO L226 Difference]: Without dead ends: 120768 [2020-12-22 09:04:02,121 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 09:04:02,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120768 states. [2020-12-22 09:04:09,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120768 to 120766. [2020-12-22 09:04:09,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120766 states. [2020-12-22 09:04:09,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120766 states to 120766 states and 188351 transitions. [2020-12-22 09:04:09,567 INFO L78 Accepts]: Start accepts. Automaton has 120766 states and 188351 transitions. Word has length 75 [2020-12-22 09:04:09,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:04:09,567 INFO L481 AbstractCegarLoop]: Abstraction has 120766 states and 188351 transitions. [2020-12-22 09:04:09,567 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:04:09,567 INFO L276 IsEmpty]: Start isEmpty. Operand 120766 states and 188351 transitions. [2020-12-22 09:04:09,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-12-22 09:04:09,569 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:04:09,569 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] [2020-12-22 09:04:09,569 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 09:04:09,569 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:04:09,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:04:09,570 INFO L82 PathProgramCache]: Analyzing trace with hash -259692172, now seen corresponding path program 1 times [2020-12-22 09:04:09,570 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:04:09,570 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823708742] [2020-12-22 09:04:09,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:04:09,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:04:09,656 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 09:04:09,657 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823708742] [2020-12-22 09:04:09,657 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:04:09,657 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 09:04:09,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368006895] [2020-12-22 09:04:09,658 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 09:04:09,658 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:04:09,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 09:04:09,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 09:04:09,659 INFO L87 Difference]: Start difference. First operand 120766 states and 188351 transitions. Second operand 4 states. [2020-12-22 09:04:24,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:04:24,352 INFO L93 Difference]: Finished difference Result 354543 states and 552356 transitions. [2020-12-22 09:04:24,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 09:04:24,353 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 75 [2020-12-22 09:04:24,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:04:24,851 INFO L225 Difference]: With dead ends: 354543 [2020-12-22 09:04:24,851 INFO L226 Difference]: Without dead ends: 233833 [2020-12-22 09:04:24,969 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 09:04:25,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233833 states. [2020-12-22 09:04:39,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233833 to 233831. [2020-12-22 09:04:39,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 233831 states. [2020-12-22 09:04:40,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233831 states to 233831 states and 361969 transitions. [2020-12-22 09:04:40,214 INFO L78 Accepts]: Start accepts. Automaton has 233831 states and 361969 transitions. Word has length 75 [2020-12-22 09:04:40,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:04:40,214 INFO L481 AbstractCegarLoop]: Abstraction has 233831 states and 361969 transitions. [2020-12-22 09:04:40,214 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 09:04:40,214 INFO L276 IsEmpty]: Start isEmpty. Operand 233831 states and 361969 transitions. [2020-12-22 09:04:40,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-12-22 09:04:40,216 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:04:40,217 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] [2020-12-22 09:04:40,217 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 09:04:40,217 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:04:40,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:04:40,218 INFO L82 PathProgramCache]: Analyzing trace with hash -805359648, now seen corresponding path program 1 times [2020-12-22 09:04:40,218 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:04:40,218 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791925429] [2020-12-22 09:04:40,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:04:40,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:04:40,250 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 09:04:40,250 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791925429] [2020-12-22 09:04:40,251 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:04:40,251 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:04:40,251 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42232849] [2020-12-22 09:04:40,251 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:04:40,251 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:04:40,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:04:40,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:04:40,252 INFO L87 Difference]: Start difference. First operand 233831 states and 361969 transitions. Second operand 3 states. [2020-12-22 09:05:09,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:05:09,131 INFO L93 Difference]: Finished difference Result 701341 states and 1085674 transitions. [2020-12-22 09:05:09,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:05:09,132 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 76 [2020-12-22 09:05:09,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:05:10,381 INFO L225 Difference]: With dead ends: 701341 [2020-12-22 09:05:10,381 INFO L226 Difference]: Without dead ends: 467601 [2020-12-22 09:05:10,645 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 09:05:10,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 467601 states.