/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/pals_opt-floodmax.4.3.ufo.UNBOUNDED.pals.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 07:43:07,983 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 07:43:07,986 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 07:43:08,024 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 07:43:08,024 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 07:43:08,026 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 07:43:08,028 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 07:43:08,030 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 07:43:08,033 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 07:43:08,034 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 07:43:08,035 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 07:43:08,037 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 07:43:08,037 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 07:43:08,038 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 07:43:08,040 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 07:43:08,045 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 07:43:08,046 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 07:43:08,048 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 07:43:08,050 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 07:43:08,052 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 07:43:08,055 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 07:43:08,063 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 07:43:08,065 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 07:43:08,066 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 07:43:08,075 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 07:43:08,084 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 07:43:08,085 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 07:43:08,086 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 07:43:08,087 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 07:43:08,089 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 07:43:08,113 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 07:43:08,115 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 07:43:08,115 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 07:43:08,115 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 07:43:08,116 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 07:43:08,117 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 07:43:08,118 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 07:43:08,148 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 07:43:08,148 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 07:43:08,150 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 07:43:08,150 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 07:43:08,150 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 07:43:08,151 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 07:43:08,151 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 07:43:08,151 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 07:43:08,151 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 07:43:08,152 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 07:43:08,152 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 07:43:08,152 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 07:43:08,152 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 07:43:08,152 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 07:43:08,153 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 07:43:08,153 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 07:43:08,153 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 07:43:08,153 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 07:43:08,153 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 07:43:08,154 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 07:43:08,154 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 07:43:08,154 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 07:43:08,154 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 07:43:08,154 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 07:43:08,155 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 07:43:08,155 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 07:43:08,564 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 07:43:08,599 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 07:43:08,604 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 07:43:08,606 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 07:43:08,607 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 07:43:08,608 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.4.3.ufo.UNBOUNDED.pals.c [2020-12-22 07:43:08,702 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/be65eaf6c/2a4f752d63a54eb8a19dcb425ceb4240/FLAG5986de085 [2020-12-22 07:43:09,447 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 07:43:09,459 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.4.3.ufo.UNBOUNDED.pals.c [2020-12-22 07:43:09,481 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/be65eaf6c/2a4f752d63a54eb8a19dcb425ceb4240/FLAG5986de085 [2020-12-22 07:43:09,686 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/be65eaf6c/2a4f752d63a54eb8a19dcb425ceb4240 [2020-12-22 07:43:09,690 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 07:43:09,692 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 07:43:09,698 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 07:43:09,699 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 07:43:09,703 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 07:43:09,705 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:43:09" (1/1) ... [2020-12-22 07:43:09,708 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2ed48f54 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:43:09, skipping insertion in model container [2020-12-22 07:43:09,708 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:43:09" (1/1) ... [2020-12-22 07:43:09,718 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 07:43:09,788 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 07:43:10,170 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/pals_opt-floodmax.4.3.ufo.UNBOUNDED.pals.c[31172,31185] [2020-12-22 07:43:10,174 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 07:43:10,189 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 07:43:10,370 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/pals_opt-floodmax.4.3.ufo.UNBOUNDED.pals.c[31172,31185] [2020-12-22 07:43:10,375 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 07:43:10,411 INFO L208 MainTranslator]: Completed translation [2020-12-22 07:43:10,412 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:43:10 WrapperNode [2020-12-22 07:43:10,412 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 07:43:10,414 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 07:43:10,414 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 07:43:10,414 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 07:43:10,425 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:43:10" (1/1) ... [2020-12-22 07:43:10,444 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:43:10" (1/1) ... [2020-12-22 07:43:10,517 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 07:43:10,518 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 07:43:10,518 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 07:43:10,518 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 07:43:10,531 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:43:10" (1/1) ... [2020-12-22 07:43:10,531 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:43:10" (1/1) ... [2020-12-22 07:43:10,538 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:43:10" (1/1) ... [2020-12-22 07:43:10,539 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:43:10" (1/1) ... [2020-12-22 07:43:10,575 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:43:10" (1/1) ... [2020-12-22 07:43:10,612 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:43:10" (1/1) ... [2020-12-22 07:43:10,623 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:43:10" (1/1) ... [2020-12-22 07:43:10,645 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 07:43:10,646 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 07:43:10,647 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 07:43:10,647 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 07:43:10,648 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:43:10" (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 07:43:10,801 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 07:43:10,802 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 07:43:10,802 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 07:43:10,803 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 07:43:12,787 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 07:43:12,788 INFO L299 CfgBuilder]: Removed 21 assume(true) statements. [2020-12-22 07:43:12,794 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:43:12 BoogieIcfgContainer [2020-12-22 07:43:12,796 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 07:43:12,799 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 07:43:12,799 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 07:43:12,804 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 07:43:12,807 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 07:43:09" (1/3) ... [2020-12-22 07:43:12,809 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@652629ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 07:43:12, skipping insertion in model container [2020-12-22 07:43:12,809 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:43:10" (2/3) ... [2020-12-22 07:43:12,810 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@652629ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 07:43:12, skipping insertion in model container [2020-12-22 07:43:12,810 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:43:12" (3/3) ... [2020-12-22 07:43:12,813 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4.3.ufo.UNBOUNDED.pals.c [2020-12-22 07:43:12,821 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 07:43:12,828 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 07:43:12,853 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 07:43:12,905 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 07:43:12,906 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 07:43:12,906 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 07:43:12,906 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 07:43:12,906 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 07:43:12,906 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 07:43:12,907 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 07:43:12,907 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 07:43:12,932 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states. [2020-12-22 07:43:12,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-12-22 07:43:12,950 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:43:12,951 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:43:12,952 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:43:12,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:43:12,960 INFO L82 PathProgramCache]: Analyzing trace with hash -196336848, now seen corresponding path program 1 times [2020-12-22 07:43:12,978 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:43:12,979 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337535572] [2020-12-22 07:43:12,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:43:13,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:43:13,537 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 07:43:13,538 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337535572] [2020-12-22 07:43:13,540 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:43:13,541 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 07:43:13,542 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518578918] [2020-12-22 07:43:13,548 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 07:43:13,549 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:43:13,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 07:43:13,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 07:43:13,572 INFO L87 Difference]: Start difference. First operand 331 states. Second operand 2 states. [2020-12-22 07:43:13,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:43:13,663 INFO L93 Difference]: Finished difference Result 463 states and 821 transitions. [2020-12-22 07:43:13,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 07:43:13,666 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 77 [2020-12-22 07:43:13,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:43:13,710 INFO L225 Difference]: With dead ends: 463 [2020-12-22 07:43:13,710 INFO L226 Difference]: Without dead ends: 327 [2020-12-22 07:43:13,715 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 07:43:13,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2020-12-22 07:43:13,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 327. [2020-12-22 07:43:13,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 327 states. [2020-12-22 07:43:13,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 586 transitions. [2020-12-22 07:43:13,813 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 586 transitions. Word has length 77 [2020-12-22 07:43:13,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:43:13,815 INFO L481 AbstractCegarLoop]: Abstraction has 327 states and 586 transitions. [2020-12-22 07:43:13,815 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 07:43:13,815 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 586 transitions. [2020-12-22 07:43:13,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-12-22 07:43:13,828 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:43:13,828 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:43:13,829 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 07:43:13,833 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:43:13,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:43:13,835 INFO L82 PathProgramCache]: Analyzing trace with hash -330350354, now seen corresponding path program 1 times [2020-12-22 07:43:13,835 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:43:13,836 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000949705] [2020-12-22 07:43:13,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:43:13,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:43:14,127 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 07:43:14,128 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000949705] [2020-12-22 07:43:14,128 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:43:14,128 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:43:14,130 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982352488] [2020-12-22 07:43:14,132 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:43:14,132 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:43:14,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:43:14,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:43:14,134 INFO L87 Difference]: Start difference. First operand 327 states and 586 transitions. Second operand 5 states. [2020-12-22 07:43:14,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:43:14,366 INFO L93 Difference]: Finished difference Result 462 states and 814 transitions. [2020-12-22 07:43:14,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 07:43:14,367 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 77 [2020-12-22 07:43:14,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:43:14,371 INFO L225 Difference]: With dead ends: 462 [2020-12-22 07:43:14,371 INFO L226 Difference]: Without dead ends: 327 [2020-12-22 07:43:14,373 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 07:43:14,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2020-12-22 07:43:14,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 327. [2020-12-22 07:43:14,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 327 states. [2020-12-22 07:43:14,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 540 transitions. [2020-12-22 07:43:14,399 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 540 transitions. Word has length 77 [2020-12-22 07:43:14,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:43:14,401 INFO L481 AbstractCegarLoop]: Abstraction has 327 states and 540 transitions. [2020-12-22 07:43:14,402 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:43:14,402 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 540 transitions. [2020-12-22 07:43:14,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-12-22 07:43:14,404 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:43:14,405 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:43:14,406 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 07:43:14,406 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:43:14,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:43:14,407 INFO L82 PathProgramCache]: Analyzing trace with hash -550758364, now seen corresponding path program 1 times [2020-12-22 07:43:14,407 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:43:14,408 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724776648] [2020-12-22 07:43:14,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:43:14,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:43:14,724 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 07:43:14,724 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724776648] [2020-12-22 07:43:14,725 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:43:14,725 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:43:14,726 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851994907] [2020-12-22 07:43:14,727 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:43:14,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:43:14,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:43:14,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:43:14,731 INFO L87 Difference]: Start difference. First operand 327 states and 540 transitions. Second operand 3 states. [2020-12-22 07:43:14,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:43:14,834 INFO L93 Difference]: Finished difference Result 577 states and 966 transitions. [2020-12-22 07:43:14,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:43:14,835 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 122 [2020-12-22 07:43:14,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:43:14,842 INFO L225 Difference]: With dead ends: 577 [2020-12-22 07:43:14,842 INFO L226 Difference]: Without dead ends: 446 [2020-12-22 07:43:14,844 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 07:43:14,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2020-12-22 07:43:14,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 443. [2020-12-22 07:43:14,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 443 states. [2020-12-22 07:43:14,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443 states to 443 states and 734 transitions. [2020-12-22 07:43:14,873 INFO L78 Accepts]: Start accepts. Automaton has 443 states and 734 transitions. Word has length 122 [2020-12-22 07:43:14,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:43:14,874 INFO L481 AbstractCegarLoop]: Abstraction has 443 states and 734 transitions. [2020-12-22 07:43:14,874 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:43:14,874 INFO L276 IsEmpty]: Start isEmpty. Operand 443 states and 734 transitions. [2020-12-22 07:43:14,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2020-12-22 07:43:14,879 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:43:14,879 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:43:14,880 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 07:43:14,880 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:43:14,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:43:14,881 INFO L82 PathProgramCache]: Analyzing trace with hash 1222100528, now seen corresponding path program 1 times [2020-12-22 07:43:14,886 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:43:14,886 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442687767] [2020-12-22 07:43:14,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:43:14,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:43:15,085 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 07:43:15,086 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442687767] [2020-12-22 07:43:15,087 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:43:15,087 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:43:15,088 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718801794] [2020-12-22 07:43:15,089 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:43:15,089 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:43:15,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:43:15,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:43:15,092 INFO L87 Difference]: Start difference. First operand 443 states and 734 transitions. Second operand 3 states. [2020-12-22 07:43:15,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:43:15,164 INFO L93 Difference]: Finished difference Result 917 states and 1534 transitions. [2020-12-22 07:43:15,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:43:15,166 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 125 [2020-12-22 07:43:15,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:43:15,172 INFO L225 Difference]: With dead ends: 917 [2020-12-22 07:43:15,172 INFO L226 Difference]: Without dead ends: 670 [2020-12-22 07:43:15,174 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 07:43:15,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 670 states. [2020-12-22 07:43:15,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 670 to 666. [2020-12-22 07:43:15,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 666 states. [2020-12-22 07:43:15,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 666 states to 666 states and 1109 transitions. [2020-12-22 07:43:15,228 INFO L78 Accepts]: Start accepts. Automaton has 666 states and 1109 transitions. Word has length 125 [2020-12-22 07:43:15,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:43:15,234 INFO L481 AbstractCegarLoop]: Abstraction has 666 states and 1109 transitions. [2020-12-22 07:43:15,234 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:43:15,234 INFO L276 IsEmpty]: Start isEmpty. Operand 666 states and 1109 transitions. [2020-12-22 07:43:15,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-12-22 07:43:15,238 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:43:15,238 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:43:15,238 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 07:43:15,238 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:43:15,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:43:15,239 INFO L82 PathProgramCache]: Analyzing trace with hash -116041787, now seen corresponding path program 1 times [2020-12-22 07:43:15,239 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:43:15,240 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820633987] [2020-12-22 07:43:15,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:43:15,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:43:15,366 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 07:43:15,367 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820633987] [2020-12-22 07:43:15,367 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:43:15,367 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:43:15,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346203359] [2020-12-22 07:43:15,368 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:43:15,368 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:43:15,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:43:15,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:43:15,369 INFO L87 Difference]: Start difference. First operand 666 states and 1109 transitions. Second operand 3 states. [2020-12-22 07:43:15,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:43:15,441 INFO L93 Difference]: Finished difference Result 1566 states and 2623 transitions. [2020-12-22 07:43:15,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:43:15,442 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 128 [2020-12-22 07:43:15,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:43:15,479 INFO L225 Difference]: With dead ends: 1566 [2020-12-22 07:43:15,479 INFO L226 Difference]: Without dead ends: 1096 [2020-12-22 07:43:15,481 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 07:43:15,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1096 states. [2020-12-22 07:43:15,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1096 to 1090. [2020-12-22 07:43:15,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1090 states. [2020-12-22 07:43:15,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1090 states to 1090 states and 1817 transitions. [2020-12-22 07:43:15,535 INFO L78 Accepts]: Start accepts. Automaton has 1090 states and 1817 transitions. Word has length 128 [2020-12-22 07:43:15,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:43:15,536 INFO L481 AbstractCegarLoop]: Abstraction has 1090 states and 1817 transitions. [2020-12-22 07:43:15,536 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:43:15,536 INFO L276 IsEmpty]: Start isEmpty. Operand 1090 states and 1817 transitions. [2020-12-22 07:43:15,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-12-22 07:43:15,540 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:43:15,540 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:43:15,540 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 07:43:15,540 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:43:15,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:43:15,541 INFO L82 PathProgramCache]: Analyzing trace with hash 655173041, now seen corresponding path program 1 times [2020-12-22 07:43:15,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:43:15,541 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395730037] [2020-12-22 07:43:15,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:43:15,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:43:15,717 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 07:43:15,717 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395730037] [2020-12-22 07:43:15,718 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:43:15,718 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:43:15,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952522551] [2020-12-22 07:43:15,719 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:43:15,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:43:15,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:43:15,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:43:15,720 INFO L87 Difference]: Start difference. First operand 1090 states and 1817 transitions. Second operand 3 states. [2020-12-22 07:43:15,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:43:15,844 INFO L93 Difference]: Finished difference Result 2798 states and 4675 transitions. [2020-12-22 07:43:15,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:43:15,846 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 131 [2020-12-22 07:43:15,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:43:15,858 INFO L225 Difference]: With dead ends: 2798 [2020-12-22 07:43:15,859 INFO L226 Difference]: Without dead ends: 1904 [2020-12-22 07:43:15,861 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 07:43:15,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1904 states. [2020-12-22 07:43:15,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1904 to 1894. [2020-12-22 07:43:15,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1894 states. [2020-12-22 07:43:15,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1894 states to 1894 states and 3149 transitions. [2020-12-22 07:43:15,968 INFO L78 Accepts]: Start accepts. Automaton has 1894 states and 3149 transitions. Word has length 131 [2020-12-22 07:43:15,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:43:15,969 INFO L481 AbstractCegarLoop]: Abstraction has 1894 states and 3149 transitions. [2020-12-22 07:43:15,969 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:43:15,969 INFO L276 IsEmpty]: Start isEmpty. Operand 1894 states and 3149 transitions. [2020-12-22 07:43:15,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2020-12-22 07:43:15,974 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:43:15,974 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:43:15,975 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 07:43:15,975 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:43:15,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:43:15,978 INFO L82 PathProgramCache]: Analyzing trace with hash 455457894, now seen corresponding path program 1 times [2020-12-22 07:43:15,984 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:43:15,984 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915459438] [2020-12-22 07:43:15,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:43:16,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:43:16,507 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 07:43:16,507 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915459438] [2020-12-22 07:43:16,508 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:43:16,508 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 07:43:16,509 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641051951] [2020-12-22 07:43:16,510 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 07:43:16,510 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:43:16,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 07:43:16,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-22 07:43:16,511 INFO L87 Difference]: Start difference. First operand 1894 states and 3149 transitions. Second operand 6 states. [2020-12-22 07:43:16,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:43:16,907 INFO L93 Difference]: Finished difference Result 7128 states and 11958 transitions. [2020-12-22 07:43:16,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 07:43:16,908 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 134 [2020-12-22 07:43:16,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:43:16,947 INFO L225 Difference]: With dead ends: 7128 [2020-12-22 07:43:16,947 INFO L226 Difference]: Without dead ends: 5430 [2020-12-22 07:43:16,955 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-22 07:43:16,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5430 states. [2020-12-22 07:43:17,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5430 to 3479. [2020-12-22 07:43:17,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3479 states. [2020-12-22 07:43:17,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3479 states to 3479 states and 5791 transitions. [2020-12-22 07:43:17,137 INFO L78 Accepts]: Start accepts. Automaton has 3479 states and 5791 transitions. Word has length 134 [2020-12-22 07:43:17,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:43:17,138 INFO L481 AbstractCegarLoop]: Abstraction has 3479 states and 5791 transitions. [2020-12-22 07:43:17,138 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 07:43:17,139 INFO L276 IsEmpty]: Start isEmpty. Operand 3479 states and 5791 transitions. [2020-12-22 07:43:17,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-12-22 07:43:17,142 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:43:17,142 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:43:17,143 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 07:43:17,143 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:43:17,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:43:17,143 INFO L82 PathProgramCache]: Analyzing trace with hash -860313711, now seen corresponding path program 1 times [2020-12-22 07:43:17,144 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:43:17,145 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080987464] [2020-12-22 07:43:17,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:43:17,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:43:17,474 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 07:43:17,474 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080987464] [2020-12-22 07:43:17,474 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:43:17,475 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:43:17,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452822148] [2020-12-22 07:43:17,475 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:43:17,476 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:43:17,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:43:17,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:43:17,477 INFO L87 Difference]: Start difference. First operand 3479 states and 5791 transitions. Second operand 4 states. [2020-12-22 07:43:17,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:43:17,816 INFO L93 Difference]: Finished difference Result 10270 states and 17204 transitions. [2020-12-22 07:43:17,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:43:17,817 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 135 [2020-12-22 07:43:17,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:43:17,860 INFO L225 Difference]: With dead ends: 10270 [2020-12-22 07:43:17,860 INFO L226 Difference]: Without dead ends: 6987 [2020-12-22 07:43:17,868 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 07:43:17,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6987 states. [2020-12-22 07:43:18,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6987 to 5168. [2020-12-22 07:43:18,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5168 states. [2020-12-22 07:43:18,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5168 states to 5168 states and 8619 transitions. [2020-12-22 07:43:18,120 INFO L78 Accepts]: Start accepts. Automaton has 5168 states and 8619 transitions. Word has length 135 [2020-12-22 07:43:18,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:43:18,120 INFO L481 AbstractCegarLoop]: Abstraction has 5168 states and 8619 transitions. [2020-12-22 07:43:18,120 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:43:18,121 INFO L276 IsEmpty]: Start isEmpty. Operand 5168 states and 8619 transitions. [2020-12-22 07:43:18,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-12-22 07:43:18,125 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:43:18,125 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:43:18,125 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 07:43:18,126 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:43:18,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:43:18,126 INFO L82 PathProgramCache]: Analyzing trace with hash 1469443837, now seen corresponding path program 1 times [2020-12-22 07:43:18,127 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:43:18,127 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317851710] [2020-12-22 07:43:18,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:43:18,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:43:18,412 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 07:43:18,417 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317851710] [2020-12-22 07:43:18,418 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:43:18,418 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:43:18,418 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419181474] [2020-12-22 07:43:18,419 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:43:18,420 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:43:18,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:43:18,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:43:18,422 INFO L87 Difference]: Start difference. First operand 5168 states and 8619 transitions. Second operand 4 states. [2020-12-22 07:43:18,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:43:18,904 INFO L93 Difference]: Finished difference Result 15356 states and 25688 transitions. [2020-12-22 07:43:18,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:43:18,905 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 136 [2020-12-22 07:43:18,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:43:18,983 INFO L225 Difference]: With dead ends: 15356 [2020-12-22 07:43:18,984 INFO L226 Difference]: Without dead ends: 10384 [2020-12-22 07:43:18,995 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 1 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 07:43:19,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10384 states. [2020-12-22 07:43:19,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10384 to 7654. [2020-12-22 07:43:19,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7654 states. [2020-12-22 07:43:19,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7654 states to 7654 states and 12751 transitions. [2020-12-22 07:43:19,441 INFO L78 Accepts]: Start accepts. Automaton has 7654 states and 12751 transitions. Word has length 136 [2020-12-22 07:43:19,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:43:19,441 INFO L481 AbstractCegarLoop]: Abstraction has 7654 states and 12751 transitions. [2020-12-22 07:43:19,441 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:43:19,442 INFO L276 IsEmpty]: Start isEmpty. Operand 7654 states and 12751 transitions. [2020-12-22 07:43:19,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2020-12-22 07:43:19,447 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:43:19,447 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:43:19,448 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 07:43:19,448 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:43:19,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:43:19,449 INFO L82 PathProgramCache]: Analyzing trace with hash 846488136, now seen corresponding path program 1 times [2020-12-22 07:43:19,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:43:19,449 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46598538] [2020-12-22 07:43:19,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:43:19,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:43:19,630 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 07:43:19,631 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46598538] [2020-12-22 07:43:19,631 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:43:19,631 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:43:19,632 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904583006] [2020-12-22 07:43:19,632 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:43:19,632 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:43:19,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:43:19,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:43:19,637 INFO L87 Difference]: Start difference. First operand 7654 states and 12751 transitions. Second operand 4 states. [2020-12-22 07:43:20,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:43:20,101 INFO L93 Difference]: Finished difference Result 22512 states and 37612 transitions. [2020-12-22 07:43:20,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:43:20,104 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 137 [2020-12-22 07:43:20,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:43:20,235 INFO L225 Difference]: With dead ends: 22512 [2020-12-22 07:43:20,236 INFO L226 Difference]: Without dead ends: 15054 [2020-12-22 07:43:20,248 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 07:43:20,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15054 states. [2020-12-22 07:43:20,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15054 to 11320. [2020-12-22 07:43:20,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11320 states. [2020-12-22 07:43:20,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11320 states to 11320 states and 18835 transitions. [2020-12-22 07:43:20,720 INFO L78 Accepts]: Start accepts. Automaton has 11320 states and 18835 transitions. Word has length 137 [2020-12-22 07:43:20,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:43:20,720 INFO L481 AbstractCegarLoop]: Abstraction has 11320 states and 18835 transitions. [2020-12-22 07:43:20,721 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:43:20,721 INFO L276 IsEmpty]: Start isEmpty. Operand 11320 states and 18835 transitions. [2020-12-22 07:43:20,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-12-22 07:43:20,726 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:43:20,727 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:43:20,727 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 07:43:20,727 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:43:20,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:43:20,728 INFO L82 PathProgramCache]: Analyzing trace with hash -1116265068, now seen corresponding path program 1 times [2020-12-22 07:43:20,728 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:43:20,728 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64669012] [2020-12-22 07:43:20,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:43:20,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:43:21,009 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 07:43:21,009 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64669012] [2020-12-22 07:43:21,010 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:43:21,010 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:43:21,010 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213459682] [2020-12-22 07:43:21,011 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:43:21,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:43:21,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:43:21,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:43:21,014 INFO L87 Difference]: Start difference. First operand 11320 states and 18835 transitions. Second operand 4 states. [2020-12-22 07:43:21,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:43:21,645 INFO L93 Difference]: Finished difference Result 34076 states and 56840 transitions. [2020-12-22 07:43:21,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:43:21,646 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 138 [2020-12-22 07:43:21,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:43:21,714 INFO L225 Difference]: With dead ends: 34076 [2020-12-22 07:43:21,714 INFO L226 Difference]: Without dead ends: 22952 [2020-12-22 07:43:21,740 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 1 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 07:43:21,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22952 states. [2020-12-22 07:43:22,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22952 to 16656. [2020-12-22 07:43:22,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16656 states. [2020-12-22 07:43:22,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16656 states to 16656 states and 27677 transitions. [2020-12-22 07:43:22,419 INFO L78 Accepts]: Start accepts. Automaton has 16656 states and 27677 transitions. Word has length 138 [2020-12-22 07:43:22,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:43:22,419 INFO L481 AbstractCegarLoop]: Abstraction has 16656 states and 27677 transitions. [2020-12-22 07:43:22,419 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:43:22,419 INFO L276 IsEmpty]: Start isEmpty. Operand 16656 states and 27677 transitions. [2020-12-22 07:43:22,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-12-22 07:43:22,428 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:43:22,428 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:43:22,428 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 07:43:22,429 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:43:22,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:43:22,429 INFO L82 PathProgramCache]: Analyzing trace with hash -397139727, now seen corresponding path program 1 times [2020-12-22 07:43:22,430 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:43:22,430 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492359157] [2020-12-22 07:43:22,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:43:22,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:43:22,530 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 07:43:22,531 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492359157] [2020-12-22 07:43:22,531 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:43:22,531 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:43:22,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445060432] [2020-12-22 07:43:22,532 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:43:22,532 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:43:22,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:43:22,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:43:22,533 INFO L87 Difference]: Start difference. First operand 16656 states and 27677 transitions. Second operand 3 states. [2020-12-22 07:43:23,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:43:23,151 INFO L93 Difference]: Finished difference Result 37966 states and 63047 transitions. [2020-12-22 07:43:23,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:43:23,152 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 138 [2020-12-22 07:43:23,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:43:23,224 INFO L225 Difference]: With dead ends: 37966 [2020-12-22 07:43:23,224 INFO L226 Difference]: Without dead ends: 26336 [2020-12-22 07:43:23,245 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 07:43:23,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26336 states. [2020-12-22 07:43:24,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26336 to 26334. [2020-12-22 07:43:24,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26334 states. [2020-12-22 07:43:24,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26334 states to 26334 states and 43507 transitions. [2020-12-22 07:43:24,108 INFO L78 Accepts]: Start accepts. Automaton has 26334 states and 43507 transitions. Word has length 138 [2020-12-22 07:43:24,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:43:24,108 INFO L481 AbstractCegarLoop]: Abstraction has 26334 states and 43507 transitions. [2020-12-22 07:43:24,109 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:43:24,109 INFO L276 IsEmpty]: Start isEmpty. Operand 26334 states and 43507 transitions. [2020-12-22 07:43:24,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-12-22 07:43:24,113 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:43:24,114 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:43:24,114 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 07:43:24,114 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:43:24,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:43:24,115 INFO L82 PathProgramCache]: Analyzing trace with hash 1906561851, now seen corresponding path program 1 times [2020-12-22 07:43:24,115 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:43:24,115 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140188808] [2020-12-22 07:43:24,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:43:24,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:43:24,202 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 07:43:24,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140188808] [2020-12-22 07:43:24,203 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:43:24,203 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:43:24,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953238985] [2020-12-22 07:43:24,203 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:43:24,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:43:24,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:43:24,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:43:24,205 INFO L87 Difference]: Start difference. First operand 26334 states and 43507 transitions. Second operand 3 states. [2020-12-22 07:43:25,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:43:25,243 INFO L93 Difference]: Finished difference Result 57932 states and 95841 transitions. [2020-12-22 07:43:25,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:43:25,244 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 138 [2020-12-22 07:43:25,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:43:25,376 INFO L225 Difference]: With dead ends: 57932 [2020-12-22 07:43:25,377 INFO L226 Difference]: Without dead ends: 39738 [2020-12-22 07:43:25,521 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 07:43:25,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39738 states. [2020-12-22 07:43:26,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39738 to 39736. [2020-12-22 07:43:26,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39736 states. [2020-12-22 07:43:27,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39736 states to 39736 states and 65427 transitions. [2020-12-22 07:43:27,036 INFO L78 Accepts]: Start accepts. Automaton has 39736 states and 65427 transitions. Word has length 138 [2020-12-22 07:43:27,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:43:27,036 INFO L481 AbstractCegarLoop]: Abstraction has 39736 states and 65427 transitions. [2020-12-22 07:43:27,037 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:43:27,037 INFO L276 IsEmpty]: Start isEmpty. Operand 39736 states and 65427 transitions. [2020-12-22 07:43:27,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-12-22 07:43:27,040 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:43:27,040 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:43:27,041 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 07:43:27,041 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:43:27,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:43:27,041 INFO L82 PathProgramCache]: Analyzing trace with hash 968808881, now seen corresponding path program 1 times [2020-12-22 07:43:27,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:43:27,042 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863776496] [2020-12-22 07:43:27,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:43:27,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:43:27,129 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 07:43:27,129 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863776496] [2020-12-22 07:43:27,130 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:43:27,130 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:43:27,130 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11775551] [2020-12-22 07:43:27,130 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:43:27,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:43:27,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:43:27,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:43:27,132 INFO L87 Difference]: Start difference. First operand 39736 states and 65427 transitions. Second operand 3 states. [2020-12-22 07:43:28,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:43:28,406 INFO L93 Difference]: Finished difference Result 87708 states and 144475 transitions. [2020-12-22 07:43:28,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:43:28,407 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 138 [2020-12-22 07:43:28,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:43:28,575 INFO L225 Difference]: With dead ends: 87708 [2020-12-22 07:43:28,576 INFO L226 Difference]: Without dead ends: 59888 [2020-12-22 07:43:28,630 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 07:43:28,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59888 states. [2020-12-22 07:43:30,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59888 to 59886. [2020-12-22 07:43:30,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59886 states. [2020-12-22 07:43:30,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59886 states to 59886 states and 98095 transitions. [2020-12-22 07:43:30,429 INFO L78 Accepts]: Start accepts. Automaton has 59886 states and 98095 transitions. Word has length 138 [2020-12-22 07:43:30,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:43:30,430 INFO L481 AbstractCegarLoop]: Abstraction has 59886 states and 98095 transitions. [2020-12-22 07:43:30,430 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:43:30,430 INFO L276 IsEmpty]: Start isEmpty. Operand 59886 states and 98095 transitions. [2020-12-22 07:43:30,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-12-22 07:43:30,437 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:43:30,438 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:43:30,438 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 07:43:30,438 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:43:30,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:43:30,439 INFO L82 PathProgramCache]: Analyzing trace with hash -1464104067, now seen corresponding path program 1 times [2020-12-22 07:43:30,439 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:43:30,439 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439692019] [2020-12-22 07:43:30,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:43:30,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:43:30,520 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 07:43:30,520 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439692019] [2020-12-22 07:43:30,520 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:43:30,520 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:43:30,521 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700061924] [2020-12-22 07:43:30,521 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:43:30,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:43:30,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:43:30,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:43:30,522 INFO L87 Difference]: Start difference. First operand 59886 states and 98095 transitions. Second operand 3 states. [2020-12-22 07:43:32,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:43:32,430 INFO L93 Difference]: Finished difference Result 133055 states and 218966 transitions. [2020-12-22 07:43:32,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:43:32,430 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 138 [2020-12-22 07:43:32,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:43:32,629 INFO L225 Difference]: With dead ends: 133055 [2020-12-22 07:43:32,630 INFO L226 Difference]: Without dead ends: 90317 [2020-12-22 07:43:32,669 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 07:43:32,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90317 states. [2020-12-22 07:43:35,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90317 to 90315. [2020-12-22 07:43:35,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90315 states. [2020-12-22 07:43:35,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90315 states to 90315 states and 147458 transitions. [2020-12-22 07:43:35,528 INFO L78 Accepts]: Start accepts. Automaton has 90315 states and 147458 transitions. Word has length 138 [2020-12-22 07:43:35,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:43:35,528 INFO L481 AbstractCegarLoop]: Abstraction has 90315 states and 147458 transitions. [2020-12-22 07:43:35,529 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:43:35,529 INFO L276 IsEmpty]: Start isEmpty. Operand 90315 states and 147458 transitions. [2020-12-22 07:43:35,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2020-12-22 07:43:35,530 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:43:35,530 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:43:35,531 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 07:43:35,531 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:43:35,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:43:35,531 INFO L82 PathProgramCache]: Analyzing trace with hash -1205053460, now seen corresponding path program 1 times [2020-12-22 07:43:35,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:43:35,532 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175991631] [2020-12-22 07:43:35,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:43:35,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:43:35,734 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 07:43:35,735 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175991631] [2020-12-22 07:43:35,735 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:43:35,735 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:43:35,736 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086470201] [2020-12-22 07:43:35,736 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:43:35,736 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:43:35,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:43:35,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:43:35,737 INFO L87 Difference]: Start difference. First operand 90315 states and 147458 transitions. Second operand 4 states. [2020-12-22 07:43:39,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:43:39,564 INFO L93 Difference]: Finished difference Result 268361 states and 437908 transitions. [2020-12-22 07:43:39,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:43:39,564 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 140 [2020-12-22 07:43:39,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:43:39,980 INFO L225 Difference]: With dead ends: 268361 [2020-12-22 07:43:39,980 INFO L226 Difference]: Without dead ends: 178057 [2020-12-22 07:43:40,118 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 07:43:40,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178057 states. [2020-12-22 07:43:44,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178057 to 178055. [2020-12-22 07:43:44,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178055 states. [2020-12-22 07:43:45,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178055 states to 178055 states and 289292 transitions. [2020-12-22 07:43:45,449 INFO L78 Accepts]: Start accepts. Automaton has 178055 states and 289292 transitions. Word has length 140 [2020-12-22 07:43:45,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:43:45,450 INFO L481 AbstractCegarLoop]: Abstraction has 178055 states and 289292 transitions. [2020-12-22 07:43:45,450 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:43:45,450 INFO L276 IsEmpty]: Start isEmpty. Operand 178055 states and 289292 transitions. [2020-12-22 07:43:45,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2020-12-22 07:43:45,459 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:43:45,459 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:43:45,459 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 07:43:45,459 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:43:45,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:43:45,460 INFO L82 PathProgramCache]: Analyzing trace with hash -38716708, now seen corresponding path program 1 times [2020-12-22 07:43:45,460 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:43:45,460 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258659041] [2020-12-22 07:43:45,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:43:45,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:43:45,541 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 07:43:45,541 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258659041] [2020-12-22 07:43:45,542 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:43:45,542 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:43:45,542 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245679693] [2020-12-22 07:43:45,542 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:43:45,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:43:45,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:43:45,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:43:45,543 INFO L87 Difference]: Start difference. First operand 178055 states and 289292 transitions. Second operand 3 states. [2020-12-22 07:43:50,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:43:50,949 INFO L93 Difference]: Finished difference Result 432222 states and 705318 transitions. [2020-12-22 07:43:50,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:43:50,949 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 141 [2020-12-22 07:43:50,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:43:51,774 INFO L225 Difference]: With dead ends: 432222 [2020-12-22 07:43:51,775 INFO L226 Difference]: Without dead ends: 254565 [2020-12-22 07:43:51,946 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 07:43:52,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254565 states. [2020-12-22 07:43:58,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254565 to 246049. [2020-12-22 07:43:58,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 246049 states. [2020-12-22 07:43:59,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246049 states to 246049 states and 398035 transitions. [2020-12-22 07:43:59,728 INFO L78 Accepts]: Start accepts. Automaton has 246049 states and 398035 transitions. Word has length 141 [2020-12-22 07:43:59,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:43:59,728 INFO L481 AbstractCegarLoop]: Abstraction has 246049 states and 398035 transitions. [2020-12-22 07:43:59,728 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:43:59,728 INFO L276 IsEmpty]: Start isEmpty. Operand 246049 states and 398035 transitions. [2020-12-22 07:43:59,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2020-12-22 07:43:59,731 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:43:59,731 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:43:59,731 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 07:43:59,732 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:43:59,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:43:59,732 INFO L82 PathProgramCache]: Analyzing trace with hash 168060510, now seen corresponding path program 1 times [2020-12-22 07:43:59,732 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:43:59,733 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501015749] [2020-12-22 07:43:59,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:43:59,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:43:59,813 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 07:43:59,814 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501015749] [2020-12-22 07:43:59,814 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:43:59,814 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:43:59,819 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958606519] [2020-12-22 07:43:59,822 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:43:59,822 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:43:59,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:43:59,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:43:59,823 INFO L87 Difference]: Start difference. First operand 246049 states and 398035 transitions. Second operand 3 states. [2020-12-22 07:44:09,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:44:09,750 INFO L93 Difference]: Finished difference Result 738110 states and 1194042 transitions. [2020-12-22 07:44:09,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:44:09,751 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 142 [2020-12-22 07:44:09,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:44:11,225 INFO L225 Difference]: With dead ends: 738110 [2020-12-22 07:44:11,225 INFO L226 Difference]: Without dead ends: 492082 [2020-12-22 07:44:11,507 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 07:44:11,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 492082 states. [2020-12-22 07:44:20,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 492082 to 246062. [2020-12-22 07:44:20,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 246062 states. [2020-12-22 07:44:21,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246062 states to 246062 states and 398054 transitions. [2020-12-22 07:44:21,625 INFO L78 Accepts]: Start accepts. Automaton has 246062 states and 398054 transitions. Word has length 142 [2020-12-22 07:44:21,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:44:21,625 INFO L481 AbstractCegarLoop]: Abstraction has 246062 states and 398054 transitions. [2020-12-22 07:44:21,625 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:44:21,625 INFO L276 IsEmpty]: Start isEmpty. Operand 246062 states and 398054 transitions. [2020-12-22 07:44:21,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2020-12-22 07:44:21,640 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:44:21,641 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:44:21,641 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 07:44:21,641 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:44:21,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:44:21,641 INFO L82 PathProgramCache]: Analyzing trace with hash 1852226887, now seen corresponding path program 1 times [2020-12-22 07:44:21,642 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:44:21,645 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719595990] [2020-12-22 07:44:21,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:44:21,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:44:21,796 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 07:44:21,796 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719595990] [2020-12-22 07:44:21,796 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:44:21,796 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:44:21,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850674469] [2020-12-22 07:44:21,798 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:44:21,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:44:21,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:44:21,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:44:21,800 INFO L87 Difference]: Start difference. First operand 246062 states and 398054 transitions. Second operand 3 states. [2020-12-22 07:44:34,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:44:34,197 INFO L93 Difference]: Finished difference Result 730829 states and 1181447 transitions. [2020-12-22 07:44:34,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:44:34,198 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 142 [2020-12-22 07:44:34,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:44:35,893 INFO L225 Difference]: With dead ends: 730829 [2020-12-22 07:44:35,893 INFO L226 Difference]: Without dead ends: 484905 [2020-12-22 07:44:36,368 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 07:44:37,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 484905 states. [2020-12-22 07:44:50,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 484905 to 484903. [2020-12-22 07:44:50,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 484903 states. [2020-12-22 07:44:53,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 484903 states to 484903 states and 780343 transitions. [2020-12-22 07:44:53,453 INFO L78 Accepts]: Start accepts. Automaton has 484903 states and 780343 transitions. Word has length 142 [2020-12-22 07:44:53,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:44:53,454 INFO L481 AbstractCegarLoop]: Abstraction has 484903 states and 780343 transitions. [2020-12-22 07:44:53,454 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:44:53,454 INFO L276 IsEmpty]: Start isEmpty. Operand 484903 states and 780343 transitions. [2020-12-22 07:44:53,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2020-12-22 07:44:53,481 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:44:53,482 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:44:53,482 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 07:44:53,482 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:44:53,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:44:53,483 INFO L82 PathProgramCache]: Analyzing trace with hash 1530807031, now seen corresponding path program 1 times [2020-12-22 07:44:53,483 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:44:53,483 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105041381] [2020-12-22 07:44:53,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:44:53,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:44:53,757 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 07:44:53,758 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105041381] [2020-12-22 07:44:53,758 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:44:53,758 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:44:53,759 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645403886] [2020-12-22 07:44:53,759 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:44:53,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:44:53,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:44:53,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:44:53,760 INFO L87 Difference]: Start difference. First operand 484903 states and 780343 transitions. Second operand 4 states. [2020-12-22 07:45:17,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:45:17,679 INFO L93 Difference]: Finished difference Result 1441582 states and 2320410 transitions. [2020-12-22 07:45:17,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:45:17,679 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 143 [2020-12-22 07:45:17,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:45:20,531 INFO L225 Difference]: With dead ends: 1441582 [2020-12-22 07:45:20,531 INFO L226 Difference]: Without dead ends: 956716 [2020-12-22 07:45:21,039 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 07:45:22,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 956716 states. [2020-12-22 07:46:00,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 956716 to 956714. [2020-12-22 07:46:00,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 956714 states. [2020-12-22 07:46:07,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 956714 states to 956714 states and 1532770 transitions. [2020-12-22 07:46:07,255 INFO L78 Accepts]: Start accepts. Automaton has 956714 states and 1532770 transitions. Word has length 143 [2020-12-22 07:46:07,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:46:07,256 INFO L481 AbstractCegarLoop]: Abstraction has 956714 states and 1532770 transitions. [2020-12-22 07:46:07,256 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:46:07,259 INFO L276 IsEmpty]: Start isEmpty. Operand 956714 states and 1532770 transitions. [2020-12-22 07:46:07,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2020-12-22 07:46:07,270 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:46:07,270 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:46:07,270 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-12-22 07:46:07,271 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:46:07,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:46:07,271 INFO L82 PathProgramCache]: Analyzing trace with hash -559970864, now seen corresponding path program 1 times [2020-12-22 07:46:07,271 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:46:07,272 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141757057] [2020-12-22 07:46:07,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:46:07,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:46:07,424 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:46:07,424 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141757057] [2020-12-22 07:46:07,424 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:46:07,425 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:46:07,427 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463123585] [2020-12-22 07:46:07,427 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:46:07,428 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:46:07,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:46:07,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:46:07,429 INFO L87 Difference]: Start difference. First operand 956714 states and 1532770 transitions. Second operand 3 states.