/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.3.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 09:04:48,317 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 09:04:48,320 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 09:04:48,356 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 09:04:48,357 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 09:04:48,358 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 09:04:48,360 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 09:04:48,363 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 09:04:48,365 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 09:04:48,366 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 09:04:48,368 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 09:04:48,369 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 09:04:48,370 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 09:04:48,371 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 09:04:48,373 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 09:04:48,374 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 09:04:48,387 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 09:04:48,389 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 09:04:48,391 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 09:04:48,394 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 09:04:48,396 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 09:04:48,400 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 09:04:48,401 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 09:04:48,402 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 09:04:48,406 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 09:04:48,411 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 09:04:48,411 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 09:04:48,413 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 09:04:48,414 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 09:04:48,415 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 09:04:48,416 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 09:04:48,417 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 09:04:48,417 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 09:04:48,418 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 09:04:48,419 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 09:04:48,420 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 09:04:48,427 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 09:04:48,479 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 09:04:48,480 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 09:04:48,482 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 09:04:48,483 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 09:04:48,483 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 09:04:48,484 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 09:04:48,484 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 09:04:48,484 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 09:04:48,484 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 09:04:48,484 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 09:04:48,485 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 09:04:48,486 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 09:04:48,486 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 09:04:48,486 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 09:04:48,486 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 09:04:48,487 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 09:04:48,487 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 09:04:48,487 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 09:04:48,487 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 09:04:48,488 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 09:04:48,488 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 09:04:48,488 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 09:04:48,488 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 09:04:48,488 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 09:04:48,488 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 09:04:48,489 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 09:04:48,965 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 09:04:49,001 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 09:04:49,004 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 09:04:49,006 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 09:04:49,006 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 09:04:49,007 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.3.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2020-12-22 09:04:49,105 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/308ea6037/cdc8765d114843299448b14cf163d0ad/FLAG694f9f507 [2020-12-22 09:04:49,831 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 09:04:49,831 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.3.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2020-12-22 09:04:49,846 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/308ea6037/cdc8765d114843299448b14cf163d0ad/FLAG694f9f507 [2020-12-22 09:04:50,110 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/308ea6037/cdc8765d114843299448b14cf163d0ad [2020-12-22 09:04:50,116 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 09:04:50,119 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 09:04:50,122 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 09:04:50,123 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 09:04:50,127 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 09:04:50,127 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 09:04:50" (1/1) ... [2020-12-22 09:04:50,130 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@66fdb40e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:04:50, skipping insertion in model container [2020-12-22 09:04:50,130 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 09:04:50" (1/1) ... [2020-12-22 09:04:50,139 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 09:04:50,212 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 09:04:50,499 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.3.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c[7400,7413] [2020-12-22 09:04:50,543 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 09:04:50,573 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 09:04:50,632 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.3.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c[7400,7413] [2020-12-22 09:04:50,661 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 09:04:50,689 INFO L208 MainTranslator]: Completed translation [2020-12-22 09:04:50,689 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:04:50 WrapperNode [2020-12-22 09:04:50,690 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 09:04:50,691 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 09:04:50,691 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 09:04:50,691 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 09:04:50,701 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:04:50" (1/1) ... [2020-12-22 09:04:50,719 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:04:50" (1/1) ... [2020-12-22 09:04:50,772 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 09:04:50,777 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 09:04:50,777 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 09:04:50,777 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 09:04:50,789 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:04:50" (1/1) ... [2020-12-22 09:04:50,790 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:04:50" (1/1) ... [2020-12-22 09:04:50,808 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:04:50" (1/1) ... [2020-12-22 09:04:50,809 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:04:50" (1/1) ... [2020-12-22 09:04:50,829 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:04:50" (1/1) ... [2020-12-22 09:04:50,848 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:04:50" (1/1) ... [2020-12-22 09:04:50,854 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:04:50" (1/1) ... [2020-12-22 09:04:50,864 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 09:04:50,868 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 09:04:50,868 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 09:04:50,868 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 09:04:50,870 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:04:50" (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 09:04:51,003 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 09:04:51,005 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 09:04:51,005 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 09:04:51,005 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 09:04:51,970 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 09:04:51,970 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2020-12-22 09:04:51,973 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 09:04:51 BoogieIcfgContainer [2020-12-22 09:04:51,973 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 09:04:51,975 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 09:04:51,975 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 09:04:51,979 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 09:04:51,979 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 09:04:50" (1/3) ... [2020-12-22 09:04:51,981 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a3b7f7a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 09:04:51, skipping insertion in model container [2020-12-22 09:04:51,981 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:04:50" (2/3) ... [2020-12-22 09:04:51,981 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a3b7f7a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 09:04:51, skipping insertion in model container [2020-12-22 09:04:51,981 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 09:04:51" (3/3) ... [2020-12-22 09:04:51,983 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.3.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2020-12-22 09:04:51,990 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 09:04:51,995 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 09:04:52,019 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 09:04:52,049 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 09:04:52,050 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 09:04:52,050 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 09:04:52,050 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 09:04:52,050 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 09:04:52,051 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 09:04:52,051 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 09:04:52,051 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 09:04:52,070 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states. [2020-12-22 09:04:52,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-12-22 09:04:52,080 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:04:52,081 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 09:04:52,081 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:04:52,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:04:52,086 INFO L82 PathProgramCache]: Analyzing trace with hash -1468963440, now seen corresponding path program 1 times [2020-12-22 09:04:52,096 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:04:52,097 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552066555] [2020-12-22 09:04:52,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:04:52,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:04:52,739 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 09:04:52,740 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552066555] [2020-12-22 09:04:52,741 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:04:52,741 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:04:52,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197570936] [2020-12-22 09:04:52,746 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:04:52,746 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:04:52,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:04:52,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:04:52,765 INFO L87 Difference]: Start difference. First operand 149 states. Second operand 3 states. [2020-12-22 09:04:52,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:04:52,916 INFO L93 Difference]: Finished difference Result 323 states and 547 transitions. [2020-12-22 09:04:52,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:04:52,919 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 62 [2020-12-22 09:04:52,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:04:52,944 INFO L225 Difference]: With dead ends: 323 [2020-12-22 09:04:52,944 INFO L226 Difference]: Without dead ends: 225 [2020-12-22 09:04:52,948 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 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 09:04:52,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2020-12-22 09:04:53,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 223. [2020-12-22 09:04:53,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 223 states. [2020-12-22 09:04:53,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 349 transitions. [2020-12-22 09:04:53,058 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 349 transitions. Word has length 62 [2020-12-22 09:04:53,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:04:53,059 INFO L481 AbstractCegarLoop]: Abstraction has 223 states and 349 transitions. [2020-12-22 09:04:53,059 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:04:53,059 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 349 transitions. [2020-12-22 09:04:53,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 09:04:53,068 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:04:53,068 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 09:04:53,070 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 09:04:53,070 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:04:53,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:04:53,072 INFO L82 PathProgramCache]: Analyzing trace with hash -240910223, now seen corresponding path program 1 times [2020-12-22 09:04:53,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:04:53,074 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901170215] [2020-12-22 09:04:53,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:04:53,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:04:53,201 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 09:04:53,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901170215] [2020-12-22 09:04:53,202 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:04:53,202 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:04:53,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112086681] [2020-12-22 09:04:53,204 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:04:53,205 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:04:53,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:04:53,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:04:53,206 INFO L87 Difference]: Start difference. First operand 223 states and 349 transitions. Second operand 3 states. [2020-12-22 09:04:53,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:04:53,292 INFO L93 Difference]: Finished difference Result 539 states and 869 transitions. [2020-12-22 09:04:53,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:04:53,293 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 64 [2020-12-22 09:04:53,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:04:53,296 INFO L225 Difference]: With dead ends: 539 [2020-12-22 09:04:53,296 INFO L226 Difference]: Without dead ends: 373 [2020-12-22 09:04:53,298 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 09:04:53,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373 states. [2020-12-22 09:04:53,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373 to 371. [2020-12-22 09:04:53,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 371 states. [2020-12-22 09:04:53,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 371 states to 371 states and 592 transitions. [2020-12-22 09:04:53,327 INFO L78 Accepts]: Start accepts. Automaton has 371 states and 592 transitions. Word has length 64 [2020-12-22 09:04:53,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:04:53,328 INFO L481 AbstractCegarLoop]: Abstraction has 371 states and 592 transitions. [2020-12-22 09:04:53,328 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:04:53,328 INFO L276 IsEmpty]: Start isEmpty. Operand 371 states and 592 transitions. [2020-12-22 09:04:53,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 09:04:53,331 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:04:53,331 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 09:04:53,332 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 09:04:53,332 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:04:53,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:04:53,333 INFO L82 PathProgramCache]: Analyzing trace with hash -1851209774, now seen corresponding path program 1 times [2020-12-22 09:04:53,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:04:53,333 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814632564] [2020-12-22 09:04:53,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:04:53,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:04:53,493 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 09:04:53,494 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814632564] [2020-12-22 09:04:53,494 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:04:53,494 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:04:53,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381718924] [2020-12-22 09:04:53,495 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:04:53,495 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:04:53,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:04:53,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:04:53,498 INFO L87 Difference]: Start difference. First operand 371 states and 592 transitions. Second operand 3 states. [2020-12-22 09:04:53,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:04:53,551 INFO L93 Difference]: Finished difference Result 967 states and 1570 transitions. [2020-12-22 09:04:53,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:04:53,551 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 66 [2020-12-22 09:04:53,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:04:53,556 INFO L225 Difference]: With dead ends: 967 [2020-12-22 09:04:53,556 INFO L226 Difference]: Without dead ends: 653 [2020-12-22 09:04:53,558 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 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 09:04:53,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 653 states. [2020-12-22 09:04:53,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 653 to 651. [2020-12-22 09:04:53,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 651 states. [2020-12-22 09:04:53,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 651 states to 651 states and 1048 transitions. [2020-12-22 09:04:53,591 INFO L78 Accepts]: Start accepts. Automaton has 651 states and 1048 transitions. Word has length 66 [2020-12-22 09:04:53,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:04:53,592 INFO L481 AbstractCegarLoop]: Abstraction has 651 states and 1048 transitions. [2020-12-22 09:04:53,592 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:04:53,592 INFO L276 IsEmpty]: Start isEmpty. Operand 651 states and 1048 transitions. [2020-12-22 09:04:53,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-12-22 09:04:53,593 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:04:53,594 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 09:04:53,594 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 09:04:53,594 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:04:53,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:04:53,595 INFO L82 PathProgramCache]: Analyzing trace with hash 1666116403, now seen corresponding path program 1 times [2020-12-22 09:04:53,595 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:04:53,595 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231138736] [2020-12-22 09:04:53,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:04:53,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:04:53,752 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 09:04:53,752 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231138736] [2020-12-22 09:04:53,753 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:04:53,754 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:04:53,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510401482] [2020-12-22 09:04:53,755 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:04:53,756 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:04:53,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:04:53,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:04:53,757 INFO L87 Difference]: Start difference. First operand 651 states and 1048 transitions. Second operand 5 states. [2020-12-22 09:04:54,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:04:54,121 INFO L93 Difference]: Finished difference Result 2807 states and 4618 transitions. [2020-12-22 09:04:54,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 09:04:54,122 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 68 [2020-12-22 09:04:54,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:04:54,140 INFO L225 Difference]: With dead ends: 2807 [2020-12-22 09:04:54,140 INFO L226 Difference]: Without dead ends: 2213 [2020-12-22 09:04:54,142 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 09:04:54,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2213 states. [2020-12-22 09:04:54,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2213 to 1170. [2020-12-22 09:04:54,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1170 states. [2020-12-22 09:04:54,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1170 states to 1170 states and 1898 transitions. [2020-12-22 09:04:54,235 INFO L78 Accepts]: Start accepts. Automaton has 1170 states and 1898 transitions. Word has length 68 [2020-12-22 09:04:54,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:04:54,236 INFO L481 AbstractCegarLoop]: Abstraction has 1170 states and 1898 transitions. [2020-12-22 09:04:54,236 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:04:54,236 INFO L276 IsEmpty]: Start isEmpty. Operand 1170 states and 1898 transitions. [2020-12-22 09:04:54,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-12-22 09:04:54,238 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:04:54,239 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:04:54,239 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 09:04:54,239 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:04:54,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:04:54,240 INFO L82 PathProgramCache]: Analyzing trace with hash 47496755, now seen corresponding path program 1 times [2020-12-22 09:04:54,240 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:04:54,241 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661564799] [2020-12-22 09:04:54,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:04:54,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:04:54,380 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 09:04:54,380 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661564799] [2020-12-22 09:04:54,380 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:04:54,381 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 09:04:54,381 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655919871] [2020-12-22 09:04:54,381 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 09:04:54,381 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:04:54,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 09:04:54,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 09:04:54,384 INFO L87 Difference]: Start difference. First operand 1170 states and 1898 transitions. Second operand 4 states. [2020-12-22 09:04:54,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:04:54,603 INFO L93 Difference]: Finished difference Result 3409 states and 5599 transitions. [2020-12-22 09:04:54,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 09:04:54,604 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 69 [2020-12-22 09:04:54,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:04:54,617 INFO L225 Difference]: With dead ends: 3409 [2020-12-22 09:04:54,617 INFO L226 Difference]: Without dead ends: 2296 [2020-12-22 09:04:54,620 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 09:04:54,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2296 states. [2020-12-22 09:04:54,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2296 to 1724. [2020-12-22 09:04:54,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1724 states. [2020-12-22 09:04:54,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1724 states to 1724 states and 2808 transitions. [2020-12-22 09:04:54,729 INFO L78 Accepts]: Start accepts. Automaton has 1724 states and 2808 transitions. Word has length 69 [2020-12-22 09:04:54,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:04:54,730 INFO L481 AbstractCegarLoop]: Abstraction has 1724 states and 2808 transitions. [2020-12-22 09:04:54,730 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 09:04:54,730 INFO L276 IsEmpty]: Start isEmpty. Operand 1724 states and 2808 transitions. [2020-12-22 09:04:54,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-12-22 09:04:54,732 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:04:54,732 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 09:04:54,732 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 09:04:54,733 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:04:54,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:04:54,733 INFO L82 PathProgramCache]: Analyzing trace with hash -1156873170, now seen corresponding path program 1 times [2020-12-22 09:04:54,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:04:54,734 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865895375] [2020-12-22 09:04:54,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:04:54,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:04:54,789 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 09:04:54,789 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865895375] [2020-12-22 09:04:54,790 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:04:54,790 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:04:54,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931108286] [2020-12-22 09:04:54,790 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:04:54,791 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:04:54,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:04:54,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:04:54,792 INFO L87 Difference]: Start difference. First operand 1724 states and 2808 transitions. Second operand 3 states. [2020-12-22 09:04:54,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:04:54,964 INFO L93 Difference]: Finished difference Result 3779 states and 6218 transitions. [2020-12-22 09:04:54,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:04:54,965 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 70 [2020-12-22 09:04:54,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:04:54,980 INFO L225 Difference]: With dead ends: 3779 [2020-12-22 09:04:54,980 INFO L226 Difference]: Without dead ends: 2591 [2020-12-22 09:04:54,984 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 09:04:54,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2591 states. [2020-12-22 09:04:55,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2591 to 2589. [2020-12-22 09:04:55,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2589 states. [2020-12-22 09:04:55,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2589 states to 2589 states and 4227 transitions. [2020-12-22 09:04:55,163 INFO L78 Accepts]: Start accepts. Automaton has 2589 states and 4227 transitions. Word has length 70 [2020-12-22 09:04:55,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:04:55,163 INFO L481 AbstractCegarLoop]: Abstraction has 2589 states and 4227 transitions. [2020-12-22 09:04:55,163 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:04:55,163 INFO L276 IsEmpty]: Start isEmpty. Operand 2589 states and 4227 transitions. [2020-12-22 09:04:55,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-12-22 09:04:55,164 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:04:55,165 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 09:04:55,165 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 09:04:55,165 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:04:55,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:04:55,166 INFO L82 PathProgramCache]: Analyzing trace with hash -1843763252, now seen corresponding path program 1 times [2020-12-22 09:04:55,166 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:04:55,166 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952952270] [2020-12-22 09:04:55,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:04:55,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:04:55,228 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 09:04:55,228 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952952270] [2020-12-22 09:04:55,228 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:04:55,229 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:04:55,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750119490] [2020-12-22 09:04:55,229 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:04:55,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:04:55,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:04:55,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:04:55,231 INFO L87 Difference]: Start difference. First operand 2589 states and 4227 transitions. Second operand 3 states. [2020-12-22 09:04:55,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:04:55,462 INFO L93 Difference]: Finished difference Result 5033 states and 8246 transitions. [2020-12-22 09:04:55,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:04:55,463 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 70 [2020-12-22 09:04:55,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:04:55,483 INFO L225 Difference]: With dead ends: 5033 [2020-12-22 09:04:55,483 INFO L226 Difference]: Without dead ends: 3599 [2020-12-22 09:04:55,487 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 09:04:55,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3599 states. [2020-12-22 09:04:55,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3599 to 3597. [2020-12-22 09:04:55,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3597 states. [2020-12-22 09:04:55,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3597 states to 3597 states and 5857 transitions. [2020-12-22 09:04:55,723 INFO L78 Accepts]: Start accepts. Automaton has 3597 states and 5857 transitions. Word has length 70 [2020-12-22 09:04:55,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:04:55,723 INFO L481 AbstractCegarLoop]: Abstraction has 3597 states and 5857 transitions. [2020-12-22 09:04:55,723 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:04:55,723 INFO L276 IsEmpty]: Start isEmpty. Operand 3597 states and 5857 transitions. [2020-12-22 09:04:55,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-12-22 09:04:55,724 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:04:55,724 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 09:04:55,725 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 09:04:55,725 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:04:55,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:04:55,725 INFO L82 PathProgramCache]: Analyzing trace with hash 1414453242, now seen corresponding path program 1 times [2020-12-22 09:04:55,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:04:55,726 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046171368] [2020-12-22 09:04:55,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:04:55,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:04:55,856 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 09:04:55,857 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046171368] [2020-12-22 09:04:55,857 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:04:55,857 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 09:04:55,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233918044] [2020-12-22 09:04:55,858 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 09:04:55,858 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:04:55,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 09:04:55,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 09:04:55,859 INFO L87 Difference]: Start difference. First operand 3597 states and 5857 transitions. Second operand 4 states. [2020-12-22 09:04:56,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:04:56,365 INFO L93 Difference]: Finished difference Result 11637 states and 19017 transitions. [2020-12-22 09:04:56,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 09:04:56,366 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 70 [2020-12-22 09:04:56,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:04:56,410 INFO L225 Difference]: With dead ends: 11637 [2020-12-22 09:04:56,411 INFO L226 Difference]: Without dead ends: 8115 [2020-12-22 09:04:56,419 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 09:04:56,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8115 states. [2020-12-22 09:04:56,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8115 to 5670. [2020-12-22 09:04:56,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5670 states. [2020-12-22 09:04:56,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5670 states to 5670 states and 9202 transitions. [2020-12-22 09:04:56,819 INFO L78 Accepts]: Start accepts. Automaton has 5670 states and 9202 transitions. Word has length 70 [2020-12-22 09:04:56,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:04:56,820 INFO L481 AbstractCegarLoop]: Abstraction has 5670 states and 9202 transitions. [2020-12-22 09:04:56,820 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 09:04:56,820 INFO L276 IsEmpty]: Start isEmpty. Operand 5670 states and 9202 transitions. [2020-12-22 09:04:56,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-12-22 09:04:56,821 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:04:56,821 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] [2020-12-22 09:04:56,821 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 09:04:56,821 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:04:56,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:04:56,822 INFO L82 PathProgramCache]: Analyzing trace with hash 1510229994, now seen corresponding path program 1 times [2020-12-22 09:04:56,823 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:04:56,823 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306853708] [2020-12-22 09:04:56,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:04:56,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:04:56,912 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 09:04:56,913 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306853708] [2020-12-22 09:04:56,913 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:04:56,913 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:04:56,913 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730654092] [2020-12-22 09:04:56,914 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:04:56,914 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:04:56,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:04:56,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:04:56,915 INFO L87 Difference]: Start difference. First operand 5670 states and 9202 transitions. Second operand 3 states. [2020-12-22 09:04:57,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:04:57,397 INFO L93 Difference]: Finished difference Result 11090 states and 18039 transitions. [2020-12-22 09:04:57,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:04:57,398 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 70 [2020-12-22 09:04:57,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:04:57,451 INFO L225 Difference]: With dead ends: 11090 [2020-12-22 09:04:57,452 INFO L226 Difference]: Without dead ends: 7838 [2020-12-22 09:04:57,459 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 09:04:57,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7838 states. [2020-12-22 09:04:58,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7838 to 7836. [2020-12-22 09:04:58,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7836 states. [2020-12-22 09:04:58,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7836 states to 7836 states and 12656 transitions. [2020-12-22 09:04:58,064 INFO L78 Accepts]: Start accepts. Automaton has 7836 states and 12656 transitions. Word has length 70 [2020-12-22 09:04:58,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:04:58,064 INFO L481 AbstractCegarLoop]: Abstraction has 7836 states and 12656 transitions. [2020-12-22 09:04:58,065 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:04:58,065 INFO L276 IsEmpty]: Start isEmpty. Operand 7836 states and 12656 transitions. [2020-12-22 09:04:58,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-12-22 09:04:58,065 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:04:58,066 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 09:04:58,066 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 09:04:58,067 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:04:58,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:04:58,067 INFO L82 PathProgramCache]: Analyzing trace with hash 844989402, now seen corresponding path program 1 times [2020-12-22 09:04:58,068 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:04:58,068 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320754729] [2020-12-22 09:04:58,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:04:58,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:04:58,169 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 09:04:58,169 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320754729] [2020-12-22 09:04:58,170 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:04:58,170 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 09:04:58,170 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387969854] [2020-12-22 09:04:58,170 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 09:04:58,171 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:04:58,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 09:04:58,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 09:04:58,172 INFO L87 Difference]: Start difference. First operand 7836 states and 12656 transitions. Second operand 4 states. [2020-12-22 09:04:59,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:04:59,233 INFO L93 Difference]: Finished difference Result 25425 states and 41161 transitions. [2020-12-22 09:04:59,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 09:04:59,234 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 71 [2020-12-22 09:04:59,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:04:59,284 INFO L225 Difference]: With dead ends: 25425 [2020-12-22 09:04:59,284 INFO L226 Difference]: Without dead ends: 17680 [2020-12-22 09:04:59,300 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 09:04:59,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17680 states. [2020-12-22 09:05:00,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17680 to 12235. [2020-12-22 09:05:00,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12235 states. [2020-12-22 09:05:00,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12235 states to 12235 states and 19663 transitions. [2020-12-22 09:05:00,283 INFO L78 Accepts]: Start accepts. Automaton has 12235 states and 19663 transitions. Word has length 71 [2020-12-22 09:05:00,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:05:00,283 INFO L481 AbstractCegarLoop]: Abstraction has 12235 states and 19663 transitions. [2020-12-22 09:05:00,283 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 09:05:00,283 INFO L276 IsEmpty]: Start isEmpty. Operand 12235 states and 19663 transitions. [2020-12-22 09:05:00,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-12-22 09:05:00,284 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:05:00,284 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 09:05:00,285 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 09:05:00,285 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:05:00,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:05:00,285 INFO L82 PathProgramCache]: Analyzing trace with hash -1231314837, now seen corresponding path program 1 times [2020-12-22 09:05:00,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:05:00,286 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76576048] [2020-12-22 09:05:00,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:05:00,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:05:00,466 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:05:00,466 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76576048] [2020-12-22 09:05:00,467 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:05:00,467 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 09:05:00,467 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877425796] [2020-12-22 09:05:00,467 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 09:05:00,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:05:00,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 09:05:00,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 09:05:00,470 INFO L87 Difference]: Start difference. First operand 12235 states and 19663 transitions. Second operand 4 states. [2020-12-22 09:05:01,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:05:01,689 INFO L93 Difference]: Finished difference Result 35934 states and 57718 transitions. [2020-12-22 09:05:01,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 09:05:01,690 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 73 [2020-12-22 09:05:01,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:05:01,762 INFO L225 Difference]: With dead ends: 35934 [2020-12-22 09:05:01,762 INFO L226 Difference]: Without dead ends: 23708 [2020-12-22 09:05:01,781 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:05:01,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23708 states. [2020-12-22 09:05:03,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23708 to 23706. [2020-12-22 09:05:03,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23706 states. [2020-12-22 09:05:03,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23706 states to 23706 states and 37843 transitions. [2020-12-22 09:05:03,293 INFO L78 Accepts]: Start accepts. Automaton has 23706 states and 37843 transitions. Word has length 73 [2020-12-22 09:05:03,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:05:03,294 INFO L481 AbstractCegarLoop]: Abstraction has 23706 states and 37843 transitions. [2020-12-22 09:05:03,294 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 09:05:03,294 INFO L276 IsEmpty]: Start isEmpty. Operand 23706 states and 37843 transitions. [2020-12-22 09:05:03,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-12-22 09:05:03,295 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:05:03,295 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 09:05:03,295 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 09:05:03,296 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:05:03,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:05:03,296 INFO L82 PathProgramCache]: Analyzing trace with hash -940832745, now seen corresponding path program 1 times [2020-12-22 09:05:03,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:05:03,297 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885762746] [2020-12-22 09:05:03,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:05:03,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:05:03,335 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:05:03,336 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885762746] [2020-12-22 09:05:03,336 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:05:03,336 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:05:03,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884047896] [2020-12-22 09:05:03,337 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:05:03,337 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:05:03,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:05:03,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:05:03,338 INFO L87 Difference]: Start difference. First operand 23706 states and 37843 transitions. Second operand 3 states. [2020-12-22 09:05:06,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:05:06,078 INFO L93 Difference]: Finished difference Result 71080 states and 113467 transitions. [2020-12-22 09:05:06,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:05:06,079 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 74 [2020-12-22 09:05:06,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:05:06,222 INFO L225 Difference]: With dead ends: 71080 [2020-12-22 09:05:06,222 INFO L226 Difference]: Without dead ends: 47402 [2020-12-22 09:05:06,262 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 09:05:06,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47402 states. [2020-12-22 09:05:08,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47402 to 23708. [2020-12-22 09:05:08,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23708 states. [2020-12-22 09:05:08,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23708 states to 23708 states and 37845 transitions. [2020-12-22 09:05:08,810 INFO L78 Accepts]: Start accepts. Automaton has 23708 states and 37845 transitions. Word has length 74 [2020-12-22 09:05:08,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:05:08,810 INFO L481 AbstractCegarLoop]: Abstraction has 23708 states and 37845 transitions. [2020-12-22 09:05:08,811 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:05:08,811 INFO L276 IsEmpty]: Start isEmpty. Operand 23708 states and 37845 transitions. [2020-12-22 09:05:08,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-12-22 09:05:08,811 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:05:08,812 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 09:05:08,812 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 09:05:08,812 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:05:08,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:05:08,812 INFO L82 PathProgramCache]: Analyzing trace with hash 826320946, now seen corresponding path program 1 times [2020-12-22 09:05:08,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:05:08,813 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127751451] [2020-12-22 09:05:08,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:05:08,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:05:08,863 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:05:08,864 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127751451] [2020-12-22 09:05:08,864 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:05:08,864 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:05:08,865 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847371896] [2020-12-22 09:05:08,865 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:05:08,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:05:08,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:05:08,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:05:08,866 INFO L87 Difference]: Start difference. First operand 23708 states and 37845 transitions. Second operand 3 states. [2020-12-22 09:05:10,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:05:10,623 INFO L93 Difference]: Finished difference Result 57125 states and 91716 transitions. [2020-12-22 09:05:10,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:05:10,623 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 74 [2020-12-22 09:05:10,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:05:10,696 INFO L225 Difference]: With dead ends: 57125 [2020-12-22 09:05:10,696 INFO L226 Difference]: Without dead ends: 33546 [2020-12-22 09:05:10,736 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 09:05:10,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33546 states. [2020-12-22 09:05:13,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33546 to 32634. [2020-12-22 09:05:13,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32634 states. [2020-12-22 09:05:13,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32634 states to 32634 states and 52000 transitions. [2020-12-22 09:05:13,201 INFO L78 Accepts]: Start accepts. Automaton has 32634 states and 52000 transitions. Word has length 74 [2020-12-22 09:05:13,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:05:13,201 INFO L481 AbstractCegarLoop]: Abstraction has 32634 states and 52000 transitions. [2020-12-22 09:05:13,201 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:05:13,202 INFO L276 IsEmpty]: Start isEmpty. Operand 32634 states and 52000 transitions. [2020-12-22 09:05:13,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-12-22 09:05:13,203 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:05:13,203 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 09:05:13,203 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 09:05:13,203 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:05:13,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:05:13,204 INFO L82 PathProgramCache]: Analyzing trace with hash 1329573307, now seen corresponding path program 1 times [2020-12-22 09:05:13,204 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:05:13,218 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107129748] [2020-12-22 09:05:13,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:05:13,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:05:13,296 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:05:13,297 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107129748] [2020-12-22 09:05:13,297 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:05:13,298 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:05:13,298 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664357283] [2020-12-22 09:05:13,298 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:05:13,298 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:05:13,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:05:13,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:05:13,299 INFO L87 Difference]: Start difference. First operand 32634 states and 52000 transitions. Second operand 3 states. [2020-12-22 09:05:17,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:05:17,298 INFO L93 Difference]: Finished difference Result 95603 states and 152270 transitions. [2020-12-22 09:05:17,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:05:17,298 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 75 [2020-12-22 09:05:17,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:05:17,408 INFO L225 Difference]: With dead ends: 95603 [2020-12-22 09:05:17,409 INFO L226 Difference]: Without dead ends: 63142 [2020-12-22 09:05:17,442 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:05:17,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63142 states. [2020-12-22 09:05:21,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63142 to 63140. [2020-12-22 09:05:21,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63140 states. [2020-12-22 09:05:21,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63140 states to 63140 states and 99869 transitions. [2020-12-22 09:05:21,463 INFO L78 Accepts]: Start accepts. Automaton has 63140 states and 99869 transitions. Word has length 75 [2020-12-22 09:05:21,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:05:21,464 INFO L481 AbstractCegarLoop]: Abstraction has 63140 states and 99869 transitions. [2020-12-22 09:05:21,464 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:05:21,464 INFO L276 IsEmpty]: Start isEmpty. Operand 63140 states and 99869 transitions. [2020-12-22 09:05:21,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-12-22 09:05:21,470 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:05:21,471 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 09:05:21,471 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 09:05:21,471 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:05:21,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:05:21,472 INFO L82 PathProgramCache]: Analyzing trace with hash -121452674, now seen corresponding path program 1 times [2020-12-22 09:05:21,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:05:21,472 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286749888] [2020-12-22 09:05:21,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:05:21,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:05:21,592 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:05:21,592 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286749888] [2020-12-22 09:05:21,593 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:05:21,593 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:05:21,593 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149565345] [2020-12-22 09:05:21,594 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:05:21,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:05:21,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:05:21,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:05:21,595 INFO L87 Difference]: Start difference. First operand 63140 states and 99869 transitions. Second operand 5 states. [2020-12-22 09:05:28,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:05:28,907 INFO L93 Difference]: Finished difference Result 177450 states and 280542 transitions. [2020-12-22 09:05:28,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 09:05:28,907 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 75 [2020-12-22 09:05:28,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:05:29,311 INFO L225 Difference]: With dead ends: 177450 [2020-12-22 09:05:29,311 INFO L226 Difference]: Without dead ends: 114324 [2020-12-22 09:05:29,373 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:05:29,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114324 states. [2020-12-22 09:05:36,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114324 to 114322. [2020-12-22 09:05:36,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114322 states. [2020-12-22 09:05:36,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114322 states to 114322 states and 179279 transitions. [2020-12-22 09:05:36,642 INFO L78 Accepts]: Start accepts. Automaton has 114322 states and 179279 transitions. Word has length 75 [2020-12-22 09:05:36,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:05:36,642 INFO L481 AbstractCegarLoop]: Abstraction has 114322 states and 179279 transitions. [2020-12-22 09:05:36,642 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:05:36,642 INFO L276 IsEmpty]: Start isEmpty. Operand 114322 states and 179279 transitions. [2020-12-22 09:05:36,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-12-22 09:05:36,645 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:05:36,645 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 09:05:36,645 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 09:05:36,645 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:05:36,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:05:36,646 INFO L82 PathProgramCache]: Analyzing trace with hash 816290506, now seen corresponding path program 1 times [2020-12-22 09:05:36,646 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:05:36,646 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199885683] [2020-12-22 09:05:36,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:05:36,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:05:36,949 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:05:36,949 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199885683] [2020-12-22 09:05:36,952 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:05:36,952 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 09:05:36,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578472738] [2020-12-22 09:05:36,953 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 09:05:36,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:05:36,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 09:05:36,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 09:05:36,954 INFO L87 Difference]: Start difference. First operand 114322 states and 179279 transitions. Second operand 4 states. [2020-12-22 09:05:50,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:05:50,706 INFO L93 Difference]: Finished difference Result 335211 states and 525140 transitions. [2020-12-22 09:05:50,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 09:05:50,707 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 75 [2020-12-22 09:05:50,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:05:51,181 INFO L225 Difference]: With dead ends: 335211 [2020-12-22 09:05:51,182 INFO L226 Difference]: Without dead ends: 220945 [2020-12-22 09:05:51,291 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:05:51,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220945 states. [2020-12-22 09:06:05,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220945 to 220943. [2020-12-22 09:06:05,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 220943 states. [2020-12-22 09:06:06,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220943 states to 220943 states and 343825 transitions. [2020-12-22 09:06:06,384 INFO L78 Accepts]: Start accepts. Automaton has 220943 states and 343825 transitions. Word has length 75 [2020-12-22 09:06:06,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:06:06,384 INFO L481 AbstractCegarLoop]: Abstraction has 220943 states and 343825 transitions. [2020-12-22 09:06:06,384 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 09:06:06,384 INFO L276 IsEmpty]: Start isEmpty. Operand 220943 states and 343825 transitions. [2020-12-22 09:06:06,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-12-22 09:06:06,387 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:06:06,387 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 09:06:06,387 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 09:06:06,387 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:06:06,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:06:06,388 INFO L82 PathProgramCache]: Analyzing trace with hash -353140970, now seen corresponding path program 1 times [2020-12-22 09:06:06,388 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:06:06,388 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080723486] [2020-12-22 09:06:06,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:06:06,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:06:06,433 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:06:06,433 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080723486] [2020-12-22 09:06:06,434 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:06:06,434 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:06:06,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233163760] [2020-12-22 09:06:06,434 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:06:06,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:06:06,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:06:06,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:06:06,435 INFO L87 Difference]: Start difference. First operand 220943 states and 343825 transitions. Second operand 3 states. [2020-12-22 09:06:34,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:06:34,569 INFO L93 Difference]: Finished difference Result 662677 states and 1031242 transitions. [2020-12-22 09:06:34,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:06:34,570 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 76 [2020-12-22 09:06:34,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:06:35,837 INFO L225 Difference]: With dead ends: 662677 [2020-12-22 09:06:35,838 INFO L226 Difference]: Without dead ends: 441825 [2020-12-22 09:06:36,108 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 09:06:36,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 441825 states.