/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/combinations/pals_lcr.6.ufo.BOUNDED-12.pals+Problem12_label03.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 10:04:09,677 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 10:04:09,681 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 10:04:09,737 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 10:04:09,738 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 10:04:09,742 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 10:04:09,746 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 10:04:09,754 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 10:04:09,757 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 10:04:09,763 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 10:04:09,765 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 10:04:09,766 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 10:04:09,767 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 10:04:09,770 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 10:04:09,772 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 10:04:09,774 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 10:04:09,775 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 10:04:09,779 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 10:04:09,803 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 10:04:09,811 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 10:04:09,815 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 10:04:09,819 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 10:04:09,820 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 10:04:09,823 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 10:04:09,830 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 10:04:09,845 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 10:04:09,846 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 10:04:09,847 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 10:04:09,848 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 10:04:09,904 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 10:04:09,904 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 10:04:09,908 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 10:04:09,908 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 10:04:09,909 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 10:04:09,909 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 10:04:09,909 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 10:04:09,909 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 10:04:09,910 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 10:04:09,910 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 10:04:09,911 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 10:04:09,911 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 10:04:09,912 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 10:04:09,912 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 10:04:09,912 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 10:04:09,912 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 10:04:09,913 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 10:04:09,913 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 10:04:09,913 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 10:04:09,913 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 10:04:09,914 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 10:04:09,914 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 10:04:09,914 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 10:04:09,914 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 10:04:09,914 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 10:04:09,915 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 10:04:10,298 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 10:04:10,328 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 10:04:10,331 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 10:04:10,333 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 10:04:10,333 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 10:04:10,334 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pals_lcr.6.ufo.BOUNDED-12.pals+Problem12_label03.c [2020-12-22 10:04:10,410 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1fc8aaf19/c208027d6e7a43c3a282b84ff197dd73/FLAGf8219def9 [2020-12-22 10:04:11,517 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 10:04:11,518 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.6.ufo.BOUNDED-12.pals+Problem12_label03.c [2020-12-22 10:04:11,551 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1fc8aaf19/c208027d6e7a43c3a282b84ff197dd73/FLAGf8219def9 [2020-12-22 10:04:11,986 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1fc8aaf19/c208027d6e7a43c3a282b84ff197dd73 [2020-12-22 10:04:11,989 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 10:04:11,992 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 10:04:11,994 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 10:04:11,994 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 10:04:12,000 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 10:04:12,001 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 10:04:11" (1/1) ... [2020-12-22 10:04:12,003 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@716d8ce5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:04:12, skipping insertion in model container [2020-12-22 10:04:12,004 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 10:04:11" (1/1) ... [2020-12-22 10:04:12,012 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 10:04:12,209 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 10:04:12,542 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/combinations/pals_lcr.6.ufo.BOUNDED-12.pals+Problem12_label03.c[15586,15599] [2020-12-22 10:04:12,585 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/combinations/pals_lcr.6.ufo.BOUNDED-12.pals+Problem12_label03.c[17680,17693] [2020-12-22 10:04:13,721 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 10:04:13,737 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 10:04:13,807 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/combinations/pals_lcr.6.ufo.BOUNDED-12.pals+Problem12_label03.c[15586,15599] [2020-12-22 10:04:13,868 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/combinations/pals_lcr.6.ufo.BOUNDED-12.pals+Problem12_label03.c[17680,17693] [2020-12-22 10:04:14,470 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 10:04:14,520 INFO L208 MainTranslator]: Completed translation [2020-12-22 10:04:14,521 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:04:14 WrapperNode [2020-12-22 10:04:14,521 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 10:04:14,523 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 10:04:14,523 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 10:04:14,523 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 10:04:14,531 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:04:14" (1/1) ... [2020-12-22 10:04:14,611 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:04:14" (1/1) ... [2020-12-22 10:04:15,111 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 10:04:15,114 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 10:04:15,114 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 10:04:15,115 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 10:04:15,129 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:04:14" (1/1) ... [2020-12-22 10:04:15,129 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:04:14" (1/1) ... [2020-12-22 10:04:15,180 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:04:14" (1/1) ... [2020-12-22 10:04:15,181 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:04:14" (1/1) ... [2020-12-22 10:04:15,457 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:04:14" (1/1) ... [2020-12-22 10:04:15,486 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:04:14" (1/1) ... [2020-12-22 10:04:15,572 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:04:14" (1/1) ... [2020-12-22 10:04:15,732 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 10:04:15,735 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 10:04:15,735 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 10:04:15,736 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 10:04:15,740 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:04:14" (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 10:04:15,981 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 10:04:15,981 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 10:04:15,981 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 10:04:15,982 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 10:04:21,751 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 10:04:21,752 INFO L299 CfgBuilder]: Removed 38 assume(true) statements. [2020-12-22 10:04:21,755 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 10:04:21 BoogieIcfgContainer [2020-12-22 10:04:21,756 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 10:04:21,757 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 10:04:21,758 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 10:04:21,761 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 10:04:21,762 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 10:04:11" (1/3) ... [2020-12-22 10:04:21,763 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f45c265 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 10:04:21, skipping insertion in model container [2020-12-22 10:04:21,763 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:04:14" (2/3) ... [2020-12-22 10:04:21,763 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f45c265 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 10:04:21, skipping insertion in model container [2020-12-22 10:04:21,763 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 10:04:21" (3/3) ... [2020-12-22 10:04:21,765 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.6.ufo.BOUNDED-12.pals+Problem12_label03.c [2020-12-22 10:04:21,772 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 10:04:21,778 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-22 10:04:21,799 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-22 10:04:21,836 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 10:04:21,836 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 10:04:21,836 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 10:04:21,836 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 10:04:21,837 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 10:04:21,837 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 10:04:21,837 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 10:04:21,837 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 10:04:21,872 INFO L276 IsEmpty]: Start isEmpty. Operand 926 states. [2020-12-22 10:04:21,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-22 10:04:21,881 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:04:21,882 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] [2020-12-22 10:04:21,882 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:04:21,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:04:21,889 INFO L82 PathProgramCache]: Analyzing trace with hash -2133274203, now seen corresponding path program 1 times [2020-12-22 10:04:21,900 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:04:21,900 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834125129] [2020-12-22 10:04:21,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:04:22,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:04:22,306 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 10:04:22,307 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834125129] [2020-12-22 10:04:22,308 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:04:22,308 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 10:04:22,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945653698] [2020-12-22 10:04:22,315 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:04:22,316 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:04:22,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:04:22,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:04:22,339 INFO L87 Difference]: Start difference. First operand 926 states. Second operand 3 states. [2020-12-22 10:04:29,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:04:29,191 INFO L93 Difference]: Finished difference Result 2577 states and 4936 transitions. [2020-12-22 10:04:29,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:04:29,193 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-12-22 10:04:29,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:04:29,233 INFO L225 Difference]: With dead ends: 2577 [2020-12-22 10:04:29,233 INFO L226 Difference]: Without dead ends: 1611 [2020-12-22 10:04:29,244 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 10:04:29,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1611 states. [2020-12-22 10:04:29,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1611 to 1611. [2020-12-22 10:04:29,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1611 states. [2020-12-22 10:04:29,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1611 states to 1611 states and 2599 transitions. [2020-12-22 10:04:29,406 INFO L78 Accepts]: Start accepts. Automaton has 1611 states and 2599 transitions. Word has length 20 [2020-12-22 10:04:29,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:04:29,406 INFO L481 AbstractCegarLoop]: Abstraction has 1611 states and 2599 transitions. [2020-12-22 10:04:29,406 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:04:29,407 INFO L276 IsEmpty]: Start isEmpty. Operand 1611 states and 2599 transitions. [2020-12-22 10:04:29,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-12-22 10:04:29,411 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:04:29,412 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] [2020-12-22 10:04:29,412 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 10:04:29,412 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:04:29,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:04:29,415 INFO L82 PathProgramCache]: Analyzing trace with hash 615382892, now seen corresponding path program 1 times [2020-12-22 10:04:29,415 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:04:29,416 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433723167] [2020-12-22 10:04:29,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:04:29,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:04:29,621 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 10:04:29,622 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433723167] [2020-12-22 10:04:29,622 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:04:29,622 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 10:04:29,623 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712961229] [2020-12-22 10:04:29,624 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 10:04:29,625 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:04:29,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 10:04:29,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 10:04:29,626 INFO L87 Difference]: Start difference. First operand 1611 states and 2599 transitions. Second operand 5 states. [2020-12-22 10:04:29,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:04:29,767 INFO L93 Difference]: Finished difference Result 1675 states and 2698 transitions. [2020-12-22 10:04:29,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 10:04:29,768 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 38 [2020-12-22 10:04:29,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:04:29,778 INFO L225 Difference]: With dead ends: 1675 [2020-12-22 10:04:29,779 INFO L226 Difference]: Without dead ends: 1611 [2020-12-22 10:04:29,781 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 10:04:29,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1611 states. [2020-12-22 10:04:29,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1611 to 1611. [2020-12-22 10:04:29,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1611 states. [2020-12-22 10:04:29,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1611 states to 1611 states and 2559 transitions. [2020-12-22 10:04:29,835 INFO L78 Accepts]: Start accepts. Automaton has 1611 states and 2559 transitions. Word has length 38 [2020-12-22 10:04:29,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:04:29,836 INFO L481 AbstractCegarLoop]: Abstraction has 1611 states and 2559 transitions. [2020-12-22 10:04:29,836 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 10:04:29,836 INFO L276 IsEmpty]: Start isEmpty. Operand 1611 states and 2559 transitions. [2020-12-22 10:04:29,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-12-22 10:04:29,840 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:04:29,840 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 10:04:29,840 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 10:04:29,840 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:04:29,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:04:29,841 INFO L82 PathProgramCache]: Analyzing trace with hash -2101054792, now seen corresponding path program 1 times [2020-12-22 10:04:29,842 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:04:29,842 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052884398] [2020-12-22 10:04:29,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:04:29,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:04:30,002 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 10:04:30,003 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052884398] [2020-12-22 10:04:30,003 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:04:30,003 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:04:30,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3206119] [2020-12-22 10:04:30,004 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:04:30,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:04:30,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:04:30,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:04:30,006 INFO L87 Difference]: Start difference. First operand 1611 states and 2559 transitions. Second operand 3 states. [2020-12-22 10:04:30,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:04:30,068 INFO L93 Difference]: Finished difference Result 1725 states and 2739 transitions. [2020-12-22 10:04:30,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:04:30,069 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 77 [2020-12-22 10:04:30,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:04:30,080 INFO L225 Difference]: With dead ends: 1725 [2020-12-22 10:04:30,081 INFO L226 Difference]: Without dead ends: 1665 [2020-12-22 10:04:30,083 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 10:04:30,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1665 states. [2020-12-22 10:04:30,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1665 to 1663. [2020-12-22 10:04:30,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1663 states. [2020-12-22 10:04:30,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1663 states to 1663 states and 2642 transitions. [2020-12-22 10:04:30,235 INFO L78 Accepts]: Start accepts. Automaton has 1663 states and 2642 transitions. Word has length 77 [2020-12-22 10:04:30,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:04:30,238 INFO L481 AbstractCegarLoop]: Abstraction has 1663 states and 2642 transitions. [2020-12-22 10:04:30,238 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:04:30,238 INFO L276 IsEmpty]: Start isEmpty. Operand 1663 states and 2642 transitions. [2020-12-22 10:04:30,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-12-22 10:04:30,248 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:04:30,248 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 10:04:30,248 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 10:04:30,249 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:04:30,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:04:30,249 INFO L82 PathProgramCache]: Analyzing trace with hash 1452480302, now seen corresponding path program 1 times [2020-12-22 10:04:30,250 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:04:30,250 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186797642] [2020-12-22 10:04:30,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:04:30,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:04:30,447 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 10:04:30,448 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186797642] [2020-12-22 10:04:30,449 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:04:30,449 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:04:30,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775333250] [2020-12-22 10:04:30,450 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:04:30,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:04:30,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:04:30,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:04:30,452 INFO L87 Difference]: Start difference. First operand 1663 states and 2642 transitions. Second operand 3 states. [2020-12-22 10:04:30,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:04:30,507 INFO L93 Difference]: Finished difference Result 1875 states and 2978 transitions. [2020-12-22 10:04:30,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:04:30,508 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 77 [2020-12-22 10:04:30,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:04:30,521 INFO L225 Difference]: With dead ends: 1875 [2020-12-22 10:04:30,522 INFO L226 Difference]: Without dead ends: 1763 [2020-12-22 10:04:30,523 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 10:04:30,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1763 states. [2020-12-22 10:04:30,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1763 to 1761. [2020-12-22 10:04:30,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1761 states. [2020-12-22 10:04:30,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1761 states to 1761 states and 2797 transitions. [2020-12-22 10:04:30,595 INFO L78 Accepts]: Start accepts. Automaton has 1761 states and 2797 transitions. Word has length 77 [2020-12-22 10:04:30,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:04:30,597 INFO L481 AbstractCegarLoop]: Abstraction has 1761 states and 2797 transitions. [2020-12-22 10:04:30,597 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:04:30,597 INFO L276 IsEmpty]: Start isEmpty. Operand 1761 states and 2797 transitions. [2020-12-22 10:04:30,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-12-22 10:04:30,599 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:04:30,600 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 10:04:30,600 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 10:04:30,601 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:04:30,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:04:30,601 INFO L82 PathProgramCache]: Analyzing trace with hash -1624501596, now seen corresponding path program 1 times [2020-12-22 10:04:30,602 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:04:30,603 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717298944] [2020-12-22 10:04:30,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:04:30,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:04:30,812 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 10:04:30,813 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717298944] [2020-12-22 10:04:30,814 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:04:30,814 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 10:04:30,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195108140] [2020-12-22 10:04:30,817 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 10:04:30,817 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:04:30,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 10:04:30,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-12-22 10:04:30,819 INFO L87 Difference]: Start difference. First operand 1761 states and 2797 transitions. Second operand 8 states. [2020-12-22 10:04:31,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:04:31,340 INFO L93 Difference]: Finished difference Result 4281 states and 6793 transitions. [2020-12-22 10:04:31,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-22 10:04:31,341 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 77 [2020-12-22 10:04:31,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:04:31,372 INFO L225 Difference]: With dead ends: 4281 [2020-12-22 10:04:31,372 INFO L226 Difference]: Without dead ends: 4071 [2020-12-22 10:04:31,376 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:04:31,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4071 states. [2020-12-22 10:04:31,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4071 to 1969. [2020-12-22 10:04:31,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1969 states. [2020-12-22 10:04:31,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1969 states to 1969 states and 3121 transitions. [2020-12-22 10:04:31,485 INFO L78 Accepts]: Start accepts. Automaton has 1969 states and 3121 transitions. Word has length 77 [2020-12-22 10:04:31,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:04:31,485 INFO L481 AbstractCegarLoop]: Abstraction has 1969 states and 3121 transitions. [2020-12-22 10:04:31,485 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 10:04:31,485 INFO L276 IsEmpty]: Start isEmpty. Operand 1969 states and 3121 transitions. [2020-12-22 10:04:31,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-22 10:04:31,487 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:04:31,487 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] [2020-12-22 10:04:31,487 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 10:04:31,488 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:04:31,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:04:31,488 INFO L82 PathProgramCache]: Analyzing trace with hash 806369108, now seen corresponding path program 1 times [2020-12-22 10:04:31,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:04:31,489 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322406644] [2020-12-22 10:04:31,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:04:31,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:04:31,617 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 10:04:31,617 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322406644] [2020-12-22 10:04:31,618 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:04:31,618 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:04:31,618 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937286383] [2020-12-22 10:04:31,618 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:04:31,619 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:04:31,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:04:31,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:04:31,620 INFO L87 Difference]: Start difference. First operand 1969 states and 3121 transitions. Second operand 3 states. [2020-12-22 10:04:31,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:04:31,693 INFO L93 Difference]: Finished difference Result 2589 states and 4093 transitions. [2020-12-22 10:04:31,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:04:31,693 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 79 [2020-12-22 10:04:31,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:04:31,708 INFO L225 Difference]: With dead ends: 2589 [2020-12-22 10:04:31,708 INFO L226 Difference]: Without dead ends: 2171 [2020-12-22 10:04:31,712 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 10:04:31,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2171 states. [2020-12-22 10:04:31,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2171 to 2169. [2020-12-22 10:04:31,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2169 states. [2020-12-22 10:04:31,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2169 states to 2169 states and 3429 transitions. [2020-12-22 10:04:31,806 INFO L78 Accepts]: Start accepts. Automaton has 2169 states and 3429 transitions. Word has length 79 [2020-12-22 10:04:31,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:04:31,807 INFO L481 AbstractCegarLoop]: Abstraction has 2169 states and 3429 transitions. [2020-12-22 10:04:31,807 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:04:31,808 INFO L276 IsEmpty]: Start isEmpty. Operand 2169 states and 3429 transitions. [2020-12-22 10:04:31,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-22 10:04:31,809 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:04:31,809 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] [2020-12-22 10:04:31,810 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 10:04:31,815 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:04:31,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:04:31,815 INFO L82 PathProgramCache]: Analyzing trace with hash 872862620, now seen corresponding path program 1 times [2020-12-22 10:04:31,816 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:04:31,817 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740241595] [2020-12-22 10:04:31,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:04:31,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:04:32,134 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 10:04:32,134 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740241595] [2020-12-22 10:04:32,135 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:04:32,136 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 10:04:32,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253701360] [2020-12-22 10:04:32,137 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 10:04:32,137 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:04:32,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 10:04:32,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-12-22 10:04:32,138 INFO L87 Difference]: Start difference. First operand 2169 states and 3429 transitions. Second operand 8 states. [2020-12-22 10:04:32,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:04:32,552 INFO L93 Difference]: Finished difference Result 2787 states and 4393 transitions. [2020-12-22 10:04:32,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 10:04:32,553 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 79 [2020-12-22 10:04:32,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:04:32,567 INFO L225 Difference]: With dead ends: 2787 [2020-12-22 10:04:32,567 INFO L226 Difference]: Without dead ends: 2171 [2020-12-22 10:04:32,569 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2020-12-22 10:04:32,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2171 states. [2020-12-22 10:04:32,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2171 to 2169. [2020-12-22 10:04:32,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2169 states. [2020-12-22 10:04:32,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2169 states to 2169 states and 3423 transitions. [2020-12-22 10:04:32,674 INFO L78 Accepts]: Start accepts. Automaton has 2169 states and 3423 transitions. Word has length 79 [2020-12-22 10:04:32,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:04:32,674 INFO L481 AbstractCegarLoop]: Abstraction has 2169 states and 3423 transitions. [2020-12-22 10:04:32,674 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 10:04:32,674 INFO L276 IsEmpty]: Start isEmpty. Operand 2169 states and 3423 transitions. [2020-12-22 10:04:32,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-22 10:04:32,682 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:04:32,682 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] [2020-12-22 10:04:32,683 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 10:04:32,683 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:04:32,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:04:32,684 INFO L82 PathProgramCache]: Analyzing trace with hash -385682984, now seen corresponding path program 1 times [2020-12-22 10:04:32,684 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:04:32,684 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2853372] [2020-12-22 10:04:32,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:04:32,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:04:32,787 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 10:04:32,788 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2853372] [2020-12-22 10:04:32,788 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:04:32,788 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:04:32,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102243610] [2020-12-22 10:04:32,790 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:04:32,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:04:32,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:04:32,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:04:32,791 INFO L87 Difference]: Start difference. First operand 2169 states and 3423 transitions. Second operand 3 states. [2020-12-22 10:04:32,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:04:32,930 INFO L93 Difference]: Finished difference Result 3329 states and 5217 transitions. [2020-12-22 10:04:32,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:04:32,931 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 79 [2020-12-22 10:04:32,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:04:32,947 INFO L225 Difference]: With dead ends: 3329 [2020-12-22 10:04:32,948 INFO L226 Difference]: Without dead ends: 2713 [2020-12-22 10:04:32,951 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 10:04:32,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2713 states. [2020-12-22 10:04:33,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2713 to 2711. [2020-12-22 10:04:33,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2711 states. [2020-12-22 10:04:33,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2711 states to 2711 states and 4247 transitions. [2020-12-22 10:04:33,103 INFO L78 Accepts]: Start accepts. Automaton has 2711 states and 4247 transitions. Word has length 79 [2020-12-22 10:04:33,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:04:33,104 INFO L481 AbstractCegarLoop]: Abstraction has 2711 states and 4247 transitions. [2020-12-22 10:04:33,104 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:04:33,104 INFO L276 IsEmpty]: Start isEmpty. Operand 2711 states and 4247 transitions. [2020-12-22 10:04:33,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-22 10:04:33,105 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:04:33,106 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] [2020-12-22 10:04:33,108 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 10:04:33,108 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:04:33,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:04:33,109 INFO L82 PathProgramCache]: Analyzing trace with hash -111995272, now seen corresponding path program 1 times [2020-12-22 10:04:33,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:04:33,115 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450040207] [2020-12-22 10:04:33,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:04:33,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:04:33,206 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 10:04:33,207 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450040207] [2020-12-22 10:04:33,208 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:04:33,208 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:04:33,209 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748759962] [2020-12-22 10:04:33,209 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:04:33,209 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:04:33,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:04:33,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:04:33,211 INFO L87 Difference]: Start difference. First operand 2711 states and 4247 transitions. Second operand 3 states. [2020-12-22 10:04:33,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:04:33,406 INFO L93 Difference]: Finished difference Result 4883 states and 7569 transitions. [2020-12-22 10:04:33,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:04:33,407 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 79 [2020-12-22 10:04:33,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:04:33,432 INFO L225 Difference]: With dead ends: 4883 [2020-12-22 10:04:33,432 INFO L226 Difference]: Without dead ends: 3725 [2020-12-22 10:04:33,437 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 10:04:33,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3725 states. [2020-12-22 10:04:33,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3725 to 3723. [2020-12-22 10:04:33,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3723 states. [2020-12-22 10:04:33,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3723 states to 3723 states and 5763 transitions. [2020-12-22 10:04:33,661 INFO L78 Accepts]: Start accepts. Automaton has 3723 states and 5763 transitions. Word has length 79 [2020-12-22 10:04:33,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:04:33,662 INFO L481 AbstractCegarLoop]: Abstraction has 3723 states and 5763 transitions. [2020-12-22 10:04:33,662 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:04:33,662 INFO L276 IsEmpty]: Start isEmpty. Operand 3723 states and 5763 transitions. [2020-12-22 10:04:33,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-22 10:04:33,663 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:04:33,664 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] [2020-12-22 10:04:33,664 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 10:04:33,664 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:04:33,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:04:33,665 INFO L82 PathProgramCache]: Analyzing trace with hash 1707076376, now seen corresponding path program 1 times [2020-12-22 10:04:33,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:04:33,665 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282948505] [2020-12-22 10:04:33,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:04:33,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:04:33,747 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 10:04:33,748 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282948505] [2020-12-22 10:04:33,748 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:04:33,748 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:04:33,748 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747943445] [2020-12-22 10:04:33,749 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:04:33,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:04:33,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:04:33,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:04:33,750 INFO L87 Difference]: Start difference. First operand 3723 states and 5763 transitions. Second operand 3 states. [2020-12-22 10:04:34,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:04:34,019 INFO L93 Difference]: Finished difference Result 7775 states and 11877 transitions. [2020-12-22 10:04:34,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:04:34,020 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 79 [2020-12-22 10:04:34,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:04:34,129 INFO L225 Difference]: With dead ends: 7775 [2020-12-22 10:04:34,130 INFO L226 Difference]: Without dead ends: 5605 [2020-12-22 10:04:34,134 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 10:04:34,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5605 states. [2020-12-22 10:04:34,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5605 to 5603. [2020-12-22 10:04:34,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5603 states. [2020-12-22 10:04:34,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5603 states to 5603 states and 8531 transitions. [2020-12-22 10:04:34,480 INFO L78 Accepts]: Start accepts. Automaton has 5603 states and 8531 transitions. Word has length 79 [2020-12-22 10:04:34,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:04:34,480 INFO L481 AbstractCegarLoop]: Abstraction has 5603 states and 8531 transitions. [2020-12-22 10:04:34,480 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:04:34,481 INFO L276 IsEmpty]: Start isEmpty. Operand 5603 states and 8531 transitions. [2020-12-22 10:04:34,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-22 10:04:34,482 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:04:34,482 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] [2020-12-22 10:04:34,482 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 10:04:34,482 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:04:34,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:04:34,483 INFO L82 PathProgramCache]: Analyzing trace with hash 1886482360, now seen corresponding path program 1 times [2020-12-22 10:04:34,483 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:04:34,483 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739903739] [2020-12-22 10:04:34,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:04:34,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:04:34,544 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 10:04:34,545 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739903739] [2020-12-22 10:04:34,545 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:04:34,545 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:04:34,545 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377676856] [2020-12-22 10:04:34,546 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:04:34,546 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:04:34,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:04:34,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:04:34,547 INFO L87 Difference]: Start difference. First operand 5603 states and 8531 transitions. Second operand 3 states. [2020-12-22 10:04:35,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:04:35,077 INFO L93 Difference]: Finished difference Result 13127 states and 19701 transitions. [2020-12-22 10:04:35,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:04:35,078 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 79 [2020-12-22 10:04:35,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:04:35,103 INFO L225 Difference]: With dead ends: 13127 [2020-12-22 10:04:35,104 INFO L226 Difference]: Without dead ends: 9077 [2020-12-22 10:04:35,115 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 10:04:35,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9077 states. [2020-12-22 10:04:35,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9077 to 9075. [2020-12-22 10:04:35,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9075 states. [2020-12-22 10:04:35,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9075 states to 9075 states and 13539 transitions. [2020-12-22 10:04:35,704 INFO L78 Accepts]: Start accepts. Automaton has 9075 states and 13539 transitions. Word has length 79 [2020-12-22 10:04:35,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:04:35,704 INFO L481 AbstractCegarLoop]: Abstraction has 9075 states and 13539 transitions. [2020-12-22 10:04:35,704 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:04:35,704 INFO L276 IsEmpty]: Start isEmpty. Operand 9075 states and 13539 transitions. [2020-12-22 10:04:35,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-12-22 10:04:35,706 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:04:35,706 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] [2020-12-22 10:04:35,706 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 10:04:35,706 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:04:35,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:04:35,707 INFO L82 PathProgramCache]: Analyzing trace with hash 874214487, now seen corresponding path program 1 times [2020-12-22 10:04:35,707 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:04:35,707 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7518103] [2020-12-22 10:04:35,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:04:35,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:04:35,846 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 10:04:35,846 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7518103] [2020-12-22 10:04:35,846 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:04:35,847 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 10:04:35,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977370104] [2020-12-22 10:04:35,847 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 10:04:35,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:04:35,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 10:04:35,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-12-22 10:04:35,848 INFO L87 Difference]: Start difference. First operand 9075 states and 13539 transitions. Second operand 8 states. [2020-12-22 10:04:37,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:04:37,190 INFO L93 Difference]: Finished difference Result 15538 states and 22810 transitions. [2020-12-22 10:04:37,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 10:04:37,191 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 80 [2020-12-22 10:04:37,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:04:37,229 INFO L225 Difference]: With dead ends: 15538 [2020-12-22 10:04:37,230 INFO L226 Difference]: Without dead ends: 15536 [2020-12-22 10:04:37,236 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2020-12-22 10:04:37,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15536 states. [2020-12-22 10:04:38,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15536 to 9459. [2020-12-22 10:04:38,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9459 states. [2020-12-22 10:04:38,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9459 states to 9459 states and 13891 transitions. [2020-12-22 10:04:38,041 INFO L78 Accepts]: Start accepts. Automaton has 9459 states and 13891 transitions. Word has length 80 [2020-12-22 10:04:38,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:04:38,042 INFO L481 AbstractCegarLoop]: Abstraction has 9459 states and 13891 transitions. [2020-12-22 10:04:38,042 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 10:04:38,042 INFO L276 IsEmpty]: Start isEmpty. Operand 9459 states and 13891 transitions. [2020-12-22 10:04:38,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-12-22 10:04:38,043 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:04:38,044 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:04:38,044 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 10:04:38,044 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:04:38,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:04:38,045 INFO L82 PathProgramCache]: Analyzing trace with hash -759510921, now seen corresponding path program 1 times [2020-12-22 10:04:38,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:04:38,045 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22856842] [2020-12-22 10:04:38,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:04:38,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:04:38,122 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:04:38,122 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22856842] [2020-12-22 10:04:38,122 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:04:38,122 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 10:04:38,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566655077] [2020-12-22 10:04:38,123 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:04:38,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:04:38,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:04:38,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:04:38,124 INFO L87 Difference]: Start difference. First operand 9459 states and 13891 transitions. Second operand 3 states. [2020-12-22 10:04:45,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:04:45,173 INFO L93 Difference]: Finished difference Result 12467 states and 18723 transitions. [2020-12-22 10:04:45,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:04:45,174 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 95 [2020-12-22 10:04:45,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:04:45,200 INFO L225 Difference]: With dead ends: 12467 [2020-12-22 10:04:45,200 INFO L226 Difference]: Without dead ends: 10963 [2020-12-22 10:04:45,207 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 10:04:45,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10963 states. [2020-12-22 10:04:45,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10963 to 10961. [2020-12-22 10:04:45,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10961 states. [2020-12-22 10:04:45,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10961 states to 10961 states and 15862 transitions. [2020-12-22 10:04:45,845 INFO L78 Accepts]: Start accepts. Automaton has 10961 states and 15862 transitions. Word has length 95 [2020-12-22 10:04:45,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:04:45,845 INFO L481 AbstractCegarLoop]: Abstraction has 10961 states and 15862 transitions. [2020-12-22 10:04:45,846 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:04:45,846 INFO L276 IsEmpty]: Start isEmpty. Operand 10961 states and 15862 transitions. [2020-12-22 10:04:45,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-12-22 10:04:45,852 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:04:45,853 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:04:45,853 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 10:04:45,853 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:04:45,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:04:45,854 INFO L82 PathProgramCache]: Analyzing trace with hash -1411161737, now seen corresponding path program 1 times [2020-12-22 10:04:45,854 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:04:45,854 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614688470] [2020-12-22 10:04:45,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:04:45,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:04:46,167 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-12-22 10:04:46,168 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614688470] [2020-12-22 10:04:46,168 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:04:46,168 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 10:04:46,168 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731791383] [2020-12-22 10:04:46,169 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 10:04:46,169 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:04:46,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 10:04:46,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-12-22 10:04:46,170 INFO L87 Difference]: Start difference. First operand 10961 states and 15862 transitions. Second operand 8 states. [2020-12-22 10:04:48,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:04:48,685 INFO L93 Difference]: Finished difference Result 59967 states and 86573 transitions. [2020-12-22 10:04:48,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 10:04:48,685 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 112 [2020-12-22 10:04:48,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:04:48,794 INFO L225 Difference]: With dead ends: 59967 [2020-12-22 10:04:48,794 INFO L226 Difference]: Without dead ends: 52061 [2020-12-22 10:04:48,816 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-12-22 10:04:48,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52061 states. [2020-12-22 10:04:50,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52061 to 18865. [2020-12-22 10:04:50,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18865 states. [2020-12-22 10:04:50,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18865 states to 18865 states and 27190 transitions. [2020-12-22 10:04:50,469 INFO L78 Accepts]: Start accepts. Automaton has 18865 states and 27190 transitions. Word has length 112 [2020-12-22 10:04:50,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:04:50,470 INFO L481 AbstractCegarLoop]: Abstraction has 18865 states and 27190 transitions. [2020-12-22 10:04:50,470 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 10:04:50,470 INFO L276 IsEmpty]: Start isEmpty. Operand 18865 states and 27190 transitions. [2020-12-22 10:04:50,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-12-22 10:04:50,479 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:04:50,479 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:04:50,479 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 10:04:50,480 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:04:50,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:04:50,481 INFO L82 PathProgramCache]: Analyzing trace with hash -1381639519, now seen corresponding path program 1 times [2020-12-22 10:04:50,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:04:50,481 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132570241] [2020-12-22 10:04:50,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:04:50,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:04:50,649 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-12-22 10:04:50,649 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132570241] [2020-12-22 10:04:50,650 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:04:50,650 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 10:04:50,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795570274] [2020-12-22 10:04:50,651 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 10:04:50,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:04:50,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 10:04:50,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-12-22 10:04:50,652 INFO L87 Difference]: Start difference. First operand 18865 states and 27190 transitions. Second operand 8 states. [2020-12-22 10:04:53,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:04:53,748 INFO L93 Difference]: Finished difference Result 67871 states and 97901 transitions. [2020-12-22 10:04:53,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 10:04:53,748 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 112 [2020-12-22 10:04:53,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:04:53,887 INFO L225 Difference]: With dead ends: 67871 [2020-12-22 10:04:53,888 INFO L226 Difference]: Without dead ends: 59965 [2020-12-22 10:04:53,913 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-12-22 10:04:53,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59965 states. [2020-12-22 10:04:55,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59965 to 30737. [2020-12-22 10:04:55,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30737 states. [2020-12-22 10:04:55,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30737 states to 30737 states and 44102 transitions. [2020-12-22 10:04:55,955 INFO L78 Accepts]: Start accepts. Automaton has 30737 states and 44102 transitions. Word has length 112 [2020-12-22 10:04:55,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:04:55,956 INFO L481 AbstractCegarLoop]: Abstraction has 30737 states and 44102 transitions. [2020-12-22 10:04:55,956 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 10:04:55,956 INFO L276 IsEmpty]: Start isEmpty. Operand 30737 states and 44102 transitions. [2020-12-22 10:04:55,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-12-22 10:04:55,966 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:04:55,966 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:04:55,967 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 10:04:55,967 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:04:55,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:04:55,968 INFO L82 PathProgramCache]: Analyzing trace with hash -1107951807, now seen corresponding path program 1 times [2020-12-22 10:04:55,968 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:04:55,968 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751626077] [2020-12-22 10:04:55,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:04:55,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:04:56,120 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-12-22 10:04:56,120 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751626077] [2020-12-22 10:04:56,123 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:04:56,123 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 10:04:56,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871379036] [2020-12-22 10:04:56,124 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 10:04:56,124 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:04:56,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 10:04:56,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-12-22 10:04:56,125 INFO L87 Difference]: Start difference. First operand 30737 states and 44102 transitions. Second operand 8 states. [2020-12-22 10:04:59,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:04:59,916 INFO L93 Difference]: Finished difference Result 75775 states and 109229 transitions. [2020-12-22 10:04:59,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 10:04:59,917 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 112 [2020-12-22 10:04:59,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:05:00,004 INFO L225 Difference]: With dead ends: 75775 [2020-12-22 10:05:00,004 INFO L226 Difference]: Without dead ends: 67869 [2020-12-22 10:05:00,031 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-12-22 10:05:00,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67869 states. [2020-12-22 10:05:02,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67869 to 38641. [2020-12-22 10:05:02,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38641 states. [2020-12-22 10:05:02,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38641 states to 38641 states and 55430 transitions. [2020-12-22 10:05:02,857 INFO L78 Accepts]: Start accepts. Automaton has 38641 states and 55430 transitions. Word has length 112 [2020-12-22 10:05:02,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:05:02,858 INFO L481 AbstractCegarLoop]: Abstraction has 38641 states and 55430 transitions. [2020-12-22 10:05:02,858 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 10:05:02,858 INFO L276 IsEmpty]: Start isEmpty. Operand 38641 states and 55430 transitions. [2020-12-22 10:05:02,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-12-22 10:05:02,868 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:05:02,869 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:05:02,870 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 10:05:02,870 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:05:02,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:05:02,870 INFO L82 PathProgramCache]: Analyzing trace with hash 711119841, now seen corresponding path program 1 times [2020-12-22 10:05:02,871 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:05:02,871 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887939257] [2020-12-22 10:05:02,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:05:02,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:05:03,039 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-12-22 10:05:03,040 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887939257] [2020-12-22 10:05:03,040 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:05:03,040 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 10:05:03,040 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992501848] [2020-12-22 10:05:03,041 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 10:05:03,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:05:03,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 10:05:03,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-12-22 10:05:03,042 INFO L87 Difference]: Start difference. First operand 38641 states and 55430 transitions. Second operand 8 states. [2020-12-22 10:05:08,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:05:08,034 INFO L93 Difference]: Finished difference Result 83679 states and 120557 transitions. [2020-12-22 10:05:08,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 10:05:08,035 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 112 [2020-12-22 10:05:08,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:05:08,121 INFO L225 Difference]: With dead ends: 83679 [2020-12-22 10:05:08,121 INFO L226 Difference]: Without dead ends: 75773 [2020-12-22 10:05:08,146 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-12-22 10:05:08,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75773 states. [2020-12-22 10:05:11,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75773 to 46545. [2020-12-22 10:05:11,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46545 states. [2020-12-22 10:05:11,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46545 states to 46545 states and 66758 transitions. [2020-12-22 10:05:11,476 INFO L78 Accepts]: Start accepts. Automaton has 46545 states and 66758 transitions. Word has length 112 [2020-12-22 10:05:11,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:05:11,476 INFO L481 AbstractCegarLoop]: Abstraction has 46545 states and 66758 transitions. [2020-12-22 10:05:11,476 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 10:05:11,476 INFO L276 IsEmpty]: Start isEmpty. Operand 46545 states and 66758 transitions. [2020-12-22 10:05:11,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-12-22 10:05:11,488 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:05:11,488 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:05:11,488 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 10:05:11,488 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:05:11,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:05:11,489 INFO L82 PathProgramCache]: Analyzing trace with hash 890525825, now seen corresponding path program 1 times [2020-12-22 10:05:11,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:05:11,490 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266621835] [2020-12-22 10:05:11,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:05:11,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:05:11,665 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 10:05:11,668 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266621835] [2020-12-22 10:05:11,669 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:05:11,669 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 10:05:11,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251565150] [2020-12-22 10:05:11,671 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 10:05:11,671 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:05:11,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 10:05:11,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-12-22 10:05:11,672 INFO L87 Difference]: Start difference. First operand 46545 states and 66758 transitions. Second operand 8 states. [2020-12-22 10:05:17,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:05:17,048 INFO L93 Difference]: Finished difference Result 91583 states and 131885 transitions. [2020-12-22 10:05:17,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 10:05:17,049 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 112 [2020-12-22 10:05:17,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:05:17,129 INFO L225 Difference]: With dead ends: 91583 [2020-12-22 10:05:17,129 INFO L226 Difference]: Without dead ends: 83677 [2020-12-22 10:05:17,148 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-12-22 10:05:17,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83677 states. [2020-12-22 10:05:21,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83677 to 54449. [2020-12-22 10:05:21,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54449 states. [2020-12-22 10:05:21,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54449 states to 54449 states and 78086 transitions. [2020-12-22 10:05:21,235 INFO L78 Accepts]: Start accepts. Automaton has 54449 states and 78086 transitions. Word has length 112 [2020-12-22 10:05:21,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:05:21,235 INFO L481 AbstractCegarLoop]: Abstraction has 54449 states and 78086 transitions. [2020-12-22 10:05:21,235 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 10:05:21,235 INFO L276 IsEmpty]: Start isEmpty. Operand 54449 states and 78086 transitions. [2020-12-22 10:05:21,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-12-22 10:05:21,246 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:05:21,246 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:05:21,246 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 10:05:21,246 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:05:21,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:05:21,247 INFO L82 PathProgramCache]: Analyzing trace with hash -420877289, now seen corresponding path program 1 times [2020-12-22 10:05:21,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:05:21,247 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829635194] [2020-12-22 10:05:21,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:05:21,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:05:21,403 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 10:05:21,404 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829635194] [2020-12-22 10:05:21,404 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:05:21,404 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 10:05:21,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607338417] [2020-12-22 10:05:21,406 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 10:05:21,406 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:05:21,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 10:05:21,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-12-22 10:05:21,407 INFO L87 Difference]: Start difference. First operand 54449 states and 78086 transitions. Second operand 8 states. [2020-12-22 10:05:27,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:05:27,620 INFO L93 Difference]: Finished difference Result 94687 states and 136365 transitions. [2020-12-22 10:05:27,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 10:05:27,621 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 112 [2020-12-22 10:05:27,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:05:27,711 INFO L225 Difference]: With dead ends: 94687 [2020-12-22 10:05:27,711 INFO L226 Difference]: Without dead ends: 89181 [2020-12-22 10:05:27,732 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-12-22 10:05:27,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89181 states. [2020-12-22 10:05:32,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89181 to 59953. [2020-12-22 10:05:32,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59953 states. [2020-12-22 10:05:32,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59953 states to 59953 states and 86022 transitions. [2020-12-22 10:05:32,467 INFO L78 Accepts]: Start accepts. Automaton has 59953 states and 86022 transitions. Word has length 112 [2020-12-22 10:05:32,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:05:32,467 INFO L481 AbstractCegarLoop]: Abstraction has 59953 states and 86022 transitions. [2020-12-22 10:05:32,467 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 10:05:32,467 INFO L276 IsEmpty]: Start isEmpty. Operand 59953 states and 86022 transitions. [2020-12-22 10:05:32,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-12-22 10:05:32,477 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:05:32,477 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:05:32,478 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 10:05:32,478 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:05:32,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:05:32,478 INFO L82 PathProgramCache]: Analyzing trace with hash 746098925, now seen corresponding path program 1 times [2020-12-22 10:05:32,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:05:32,479 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70538359] [2020-12-22 10:05:32,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:05:32,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:05:32,564 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:05:32,564 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70538359] [2020-12-22 10:05:32,564 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:05:32,565 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:05:32,565 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975932614] [2020-12-22 10:05:32,565 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:05:32,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:05:32,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:05:32,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:05:32,566 INFO L87 Difference]: Start difference. First operand 59953 states and 86022 transitions. Second operand 3 states. [2020-12-22 10:05:36,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:05:36,950 INFO L93 Difference]: Finished difference Result 116853 states and 167608 transitions. [2020-12-22 10:05:36,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:05:36,952 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 113 [2020-12-22 10:05:36,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:05:37,017 INFO L225 Difference]: With dead ends: 116853 [2020-12-22 10:05:37,017 INFO L226 Difference]: Without dead ends: 59955 [2020-12-22 10:05:37,051 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 10:05:37,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59955 states. [2020-12-22 10:05:41,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59955 to 59953. [2020-12-22 10:05:41,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59953 states. [2020-12-22 10:05:41,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59953 states to 59953 states and 85334 transitions. [2020-12-22 10:05:41,391 INFO L78 Accepts]: Start accepts. Automaton has 59953 states and 85334 transitions. Word has length 113 [2020-12-22 10:05:41,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:05:41,391 INFO L481 AbstractCegarLoop]: Abstraction has 59953 states and 85334 transitions. [2020-12-22 10:05:41,396 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:05:41,396 INFO L276 IsEmpty]: Start isEmpty. Operand 59953 states and 85334 transitions. [2020-12-22 10:05:41,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-12-22 10:05:41,404 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:05:41,404 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:05:41,404 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-12-22 10:05:41,404 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:05:41,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:05:41,405 INFO L82 PathProgramCache]: Analyzing trace with hash -1169646557, now seen corresponding path program 1 times [2020-12-22 10:05:41,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:05:41,405 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129068234] [2020-12-22 10:05:41,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:05:41,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:05:41,491 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:05:41,491 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129068234] [2020-12-22 10:05:41,491 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:05:41,491 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:05:41,492 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059970690] [2020-12-22 10:05:41,492 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:05:41,493 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:05:41,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:05:41,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:05:41,493 INFO L87 Difference]: Start difference. First operand 59953 states and 85334 transitions. Second operand 3 states. [2020-12-22 10:05:44,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:05:44,027 INFO L93 Difference]: Finished difference Result 88405 states and 125784 transitions. [2020-12-22 10:05:44,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:05:44,028 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 113 [2020-12-22 10:05:44,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:05:44,060 INFO L225 Difference]: With dead ends: 88405 [2020-12-22 10:05:44,060 INFO L226 Difference]: Without dead ends: 31507 [2020-12-22 10:05:44,095 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 10:05:44,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31507 states. [2020-12-22 10:05:46,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31507 to 31505. [2020-12-22 10:05:46,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31505 states. [2020-12-22 10:05:46,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31505 states to 31505 states and 44542 transitions. [2020-12-22 10:05:46,607 INFO L78 Accepts]: Start accepts. Automaton has 31505 states and 44542 transitions. Word has length 113 [2020-12-22 10:05:46,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:05:46,608 INFO L481 AbstractCegarLoop]: Abstraction has 31505 states and 44542 transitions. [2020-12-22 10:05:46,608 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:05:46,608 INFO L276 IsEmpty]: Start isEmpty. Operand 31505 states and 44542 transitions. [2020-12-22 10:05:46,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-12-22 10:05:46,612 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:05:46,612 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:05:46,612 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-12-22 10:05:46,613 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:05:46,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:05:46,613 INFO L82 PathProgramCache]: Analyzing trace with hash 1209709145, now seen corresponding path program 1 times [2020-12-22 10:05:46,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:05:46,614 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586180581] [2020-12-22 10:05:46,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:05:46,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:05:46,697 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:05:46,697 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586180581] [2020-12-22 10:05:46,698 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:05:46,698 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:05:46,698 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045411622] [2020-12-22 10:05:46,698 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:05:46,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:05:46,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:05:46,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:05:46,699 INFO L87 Difference]: Start difference. First operand 31505 states and 44542 transitions. Second operand 3 states. [2020-12-22 10:05:47,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:05:47,802 INFO L93 Difference]: Finished difference Result 45733 states and 64596 transitions. [2020-12-22 10:05:47,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:05:47,802 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 113 [2020-12-22 10:05:47,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:05:47,824 INFO L225 Difference]: With dead ends: 45733 [2020-12-22 10:05:47,824 INFO L226 Difference]: Without dead ends: 17283 [2020-12-22 10:05:47,839 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 10:05:47,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17283 states. [2020-12-22 10:05:48,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17283 to 17281. [2020-12-22 10:05:48,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17281 states. [2020-12-22 10:05:49,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17281 states to 17281 states and 24318 transitions. [2020-12-22 10:05:49,112 INFO L78 Accepts]: Start accepts. Automaton has 17281 states and 24318 transitions. Word has length 113 [2020-12-22 10:05:49,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:05:49,112 INFO L481 AbstractCegarLoop]: Abstraction has 17281 states and 24318 transitions. [2020-12-22 10:05:49,112 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:05:49,112 INFO L276 IsEmpty]: Start isEmpty. Operand 17281 states and 24318 transitions. [2020-12-22 10:05:49,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-12-22 10:05:49,115 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:05:49,115 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:05:49,115 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-12-22 10:05:49,115 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:05:49,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:05:49,116 INFO L82 PathProgramCache]: Analyzing trace with hash -1498655857, now seen corresponding path program 1 times [2020-12-22 10:05:49,116 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:05:49,116 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057982344] [2020-12-22 10:05:49,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:05:49,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:05:49,217 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:05:49,220 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057982344] [2020-12-22 10:05:49,220 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:05:49,221 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:05:49,222 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494615009] [2020-12-22 10:05:49,222 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:05:49,222 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:05:49,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:05:49,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:05:49,224 INFO L87 Difference]: Start difference. First operand 17281 states and 24318 transitions. Second operand 3 states. [2020-12-22 10:05:49,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:05:49,765 INFO L93 Difference]: Finished difference Result 24397 states and 34260 transitions. [2020-12-22 10:05:49,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:05:49,766 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 113 [2020-12-22 10:05:49,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:05:49,776 INFO L225 Difference]: With dead ends: 24397 [2020-12-22 10:05:49,776 INFO L226 Difference]: Without dead ends: 10171 [2020-12-22 10:05:49,785 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 10:05:49,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10171 states. [2020-12-22 10:05:50,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10171 to 10169. [2020-12-22 10:05:50,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10169 states. [2020-12-22 10:05:50,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10169 states to 10169 states and 14292 transitions. [2020-12-22 10:05:50,502 INFO L78 Accepts]: Start accepts. Automaton has 10169 states and 14292 transitions. Word has length 113 [2020-12-22 10:05:50,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:05:50,502 INFO L481 AbstractCegarLoop]: Abstraction has 10169 states and 14292 transitions. [2020-12-22 10:05:50,502 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:05:50,503 INFO L276 IsEmpty]: Start isEmpty. Operand 10169 states and 14292 transitions. [2020-12-22 10:05:50,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-12-22 10:05:50,504 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:05:50,505 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:05:50,505 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-12-22 10:05:50,505 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:05:50,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:05:50,506 INFO L82 PathProgramCache]: Analyzing trace with hash -1585774651, now seen corresponding path program 1 times [2020-12-22 10:05:50,506 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:05:50,506 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622816069] [2020-12-22 10:05:50,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:05:50,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:05:50,915 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 11 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:05:50,915 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622816069] [2020-12-22 10:05:50,916 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1107523490] [2020-12-22 10:05:50,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:05:51,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:05:51,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 519 conjuncts, 25 conjunts are in the unsatisfiable core [2020-12-22 10:05:51,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:05:51,539 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 10:05:51,540 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:05:51,540 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 21 [2020-12-22 10:05:51,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518128284] [2020-12-22 10:05:51,541 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-22 10:05:51,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:05:51,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-22 10:05:51,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2020-12-22 10:05:51,542 INFO L87 Difference]: Start difference. First operand 10169 states and 14292 transitions. Second operand 21 states. [2020-12-22 10:05:55,366 WARN L197 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 46 [2020-12-22 10:05:55,738 WARN L197 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 45 [2020-12-22 10:05:55,959 WARN L197 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 49 [2020-12-22 10:05:56,199 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 43 [2020-12-22 10:05:56,521 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 46 [2020-12-22 10:06:00,653 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 44 [2020-12-22 10:06:02,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:06:02,101 INFO L93 Difference]: Finished difference Result 58048 states and 79597 transitions. [2020-12-22 10:06:02,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2020-12-22 10:06:02,102 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 113 [2020-12-22 10:06:02,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:06:02,256 INFO L225 Difference]: With dead ends: 58048 [2020-12-22 10:06:02,256 INFO L226 Difference]: Without dead ends: 50934 [2020-12-22 10:06:02,278 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3479 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=1672, Invalid=8228, Unknown=0, NotChecked=0, Total=9900 [2020-12-22 10:06:02,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50934 states. [2020-12-22 10:06:05,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50934 to 33189. [2020-12-22 10:06:05,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33189 states. [2020-12-22 10:06:05,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33189 states to 33189 states and 45460 transitions. [2020-12-22 10:06:05,877 INFO L78 Accepts]: Start accepts. Automaton has 33189 states and 45460 transitions. Word has length 113 [2020-12-22 10:06:05,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:06:05,878 INFO L481 AbstractCegarLoop]: Abstraction has 33189 states and 45460 transitions. [2020-12-22 10:06:05,878 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-22 10:06:05,878 INFO L276 IsEmpty]: Start isEmpty. Operand 33189 states and 45460 transitions. [2020-12-22 10:06:05,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-12-22 10:06:05,883 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:06:05,884 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:06:06,084 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-12-22 10:06:06,085 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:06:06,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:06:06,087 INFO L82 PathProgramCache]: Analyzing trace with hash -409173495, now seen corresponding path program 1 times [2020-12-22 10:06:06,087 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:06:06,087 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139523319] [2020-12-22 10:06:06,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:06:06,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:06:06,395 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 15 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:06:06,395 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139523319] [2020-12-22 10:06:06,396 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [405248422] [2020-12-22 10:06:06,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:06:06,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:06:06,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 524 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-22 10:06:06,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:06:06,839 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 10:06:07,203 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:06:07,203 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:06:07,204 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-12-22 10:06:07,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587285528] [2020-12-22 10:06:07,204 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-22 10:06:07,205 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:06:07,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-22 10:06:07,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2020-12-22 10:06:07,206 INFO L87 Difference]: Start difference. First operand 33189 states and 45460 transitions. Second operand 18 states. [2020-12-22 10:06:07,338 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-12-22 10:06:09,251 WARN L197 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 22 [2020-12-22 10:06:09,851 WARN L197 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-12-22 10:06:09,991 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2020-12-22 10:06:10,362 WARN L197 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-12-22 10:06:10,684 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2020-12-22 10:06:12,306 WARN L197 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 36 [2020-12-22 10:06:12,836 WARN L197 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 44 [2020-12-22 10:06:12,983 WARN L197 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-12-22 10:06:13,120 WARN L197 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 36 [2020-12-22 10:06:13,634 WARN L197 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 41 [2020-12-22 10:06:13,773 WARN L197 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-12-22 10:06:15,753 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 36 [2020-12-22 10:06:16,015 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2020-12-22 10:06:16,170 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-12-22 10:06:18,581 WARN L197 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-12-22 10:06:18,991 WARN L197 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-12-22 10:06:19,184 WARN L197 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-12-22 10:06:19,447 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 36 [2020-12-22 10:06:19,954 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2020-12-22 10:06:20,134 WARN L197 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 46 [2020-12-22 10:06:20,277 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2020-12-22 10:06:20,410 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2020-12-22 10:06:20,598 WARN L197 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 49 [2020-12-22 10:06:21,403 WARN L197 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-12-22 10:06:25,811 WARN L197 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 41 [2020-12-22 10:06:25,952 WARN L197 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-12-22 10:06:26,143 WARN L197 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 44 [2020-12-22 10:06:26,282 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 36 [2020-12-22 10:06:58,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:06:58,792 INFO L93 Difference]: Finished difference Result 391959 states and 529044 transitions. [2020-12-22 10:06:58,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2020-12-22 10:06:58,793 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 114 [2020-12-22 10:06:58,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:06:59,628 INFO L225 Difference]: With dead ends: 391959 [2020-12-22 10:06:59,628 INFO L226 Difference]: Without dead ends: 361825 [2020-12-22 10:06:59,725 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6383 ImplicationChecksByTransitivity, 12.1s TimeCoverageRelationStatistics Valid=2552, Invalid=14478, Unknown=0, NotChecked=0, Total=17030 [2020-12-22 10:06:59,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361825 states. [2020-12-22 10:07:16,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361825 to 139466. [2020-12-22 10:07:16,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139466 states. [2020-12-22 10:07:16,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139466 states to 139466 states and 186986 transitions. [2020-12-22 10:07:16,707 INFO L78 Accepts]: Start accepts. Automaton has 139466 states and 186986 transitions. Word has length 114 [2020-12-22 10:07:16,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:07:16,707 INFO L481 AbstractCegarLoop]: Abstraction has 139466 states and 186986 transitions. [2020-12-22 10:07:16,707 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-22 10:07:16,707 INFO L276 IsEmpty]: Start isEmpty. Operand 139466 states and 186986 transitions. [2020-12-22 10:07:16,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-12-22 10:07:16,711 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:07:16,711 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:07:16,912 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-12-22 10:07:16,913 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:07:16,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:07:16,914 INFO L82 PathProgramCache]: Analyzing trace with hash 1061210015, now seen corresponding path program 1 times [2020-12-22 10:07:16,915 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:07:16,915 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069381638] [2020-12-22 10:07:16,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:07:16,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:07:17,023 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:07:17,024 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069381638] [2020-12-22 10:07:17,024 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:07:17,024 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:07:17,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780266904] [2020-12-22 10:07:17,027 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:07:17,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:07:17,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:07:17,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:07:17,033 INFO L87 Difference]: Start difference. First operand 139466 states and 186986 transitions. Second operand 3 states. [2020-12-22 10:07:23,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:07:23,374 INFO L93 Difference]: Finished difference Result 191558 states and 256121 transitions. [2020-12-22 10:07:23,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:07:23,376 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 114 [2020-12-22 10:07:23,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:07:23,459 INFO L225 Difference]: With dead ends: 191558 [2020-12-22 10:07:23,460 INFO L226 Difference]: Without dead ends: 55147 [2020-12-22 10:07:23,521 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 10:07:23,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55147 states. [2020-12-22 10:07:29,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55147 to 51671. [2020-12-22 10:07:29,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51671 states. [2020-12-22 10:07:29,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51671 states to 51671 states and 68568 transitions. [2020-12-22 10:07:29,082 INFO L78 Accepts]: Start accepts. Automaton has 51671 states and 68568 transitions. Word has length 114 [2020-12-22 10:07:29,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:07:29,082 INFO L481 AbstractCegarLoop]: Abstraction has 51671 states and 68568 transitions. [2020-12-22 10:07:29,082 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:07:29,082 INFO L276 IsEmpty]: Start isEmpty. Operand 51671 states and 68568 transitions. [2020-12-22 10:07:29,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-12-22 10:07:29,085 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:07:29,085 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:07:29,085 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-12-22 10:07:29,085 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:07:29,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:07:29,086 INFO L82 PathProgramCache]: Analyzing trace with hash 707187499, now seen corresponding path program 1 times [2020-12-22 10:07:29,086 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:07:29,086 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084807790] [2020-12-22 10:07:29,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:07:29,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:07:29,191 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-22 10:07:29,192 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084807790] [2020-12-22 10:07:29,192 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:07:29,192 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 10:07:29,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599393153] [2020-12-22 10:07:29,192 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 10:07:29,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:07:29,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 10:07:29,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 10:07:29,194 INFO L87 Difference]: Start difference. First operand 51671 states and 68568 transitions. Second operand 6 states. [2020-12-22 10:07:34,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:07:34,478 INFO L93 Difference]: Finished difference Result 97142 states and 128792 transitions. [2020-12-22 10:07:34,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 10:07:34,479 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 114 [2020-12-22 10:07:34,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:07:34,532 INFO L225 Difference]: With dead ends: 97142 [2020-12-22 10:07:34,532 INFO L226 Difference]: Without dead ends: 48643 [2020-12-22 10:07:34,557 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:07:34,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48643 states. [2020-12-22 10:07:39,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48643 to 48643. [2020-12-22 10:07:39,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48643 states. [2020-12-22 10:07:39,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48643 states to 48643 states and 64149 transitions. [2020-12-22 10:07:39,866 INFO L78 Accepts]: Start accepts. Automaton has 48643 states and 64149 transitions. Word has length 114 [2020-12-22 10:07:39,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:07:39,866 INFO L481 AbstractCegarLoop]: Abstraction has 48643 states and 64149 transitions. [2020-12-22 10:07:39,866 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 10:07:39,867 INFO L276 IsEmpty]: Start isEmpty. Operand 48643 states and 64149 transitions. [2020-12-22 10:07:39,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-12-22 10:07:39,869 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:07:39,870 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:07:39,870 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-12-22 10:07:39,870 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:07:39,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:07:39,870 INFO L82 PathProgramCache]: Analyzing trace with hash 125621387, now seen corresponding path program 1 times [2020-12-22 10:07:39,871 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:07:39,871 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609352441] [2020-12-22 10:07:39,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:07:39,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:07:39,974 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-12-22 10:07:39,974 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609352441] [2020-12-22 10:07:39,974 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:07:39,975 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 10:07:39,975 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873093717] [2020-12-22 10:07:39,975 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 10:07:39,975 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:07:39,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 10:07:39,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 10:07:39,976 INFO L87 Difference]: Start difference. First operand 48643 states and 64149 transitions. Second operand 6 states. [2020-12-22 10:07:44,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:07:44,255 INFO L93 Difference]: Finished difference Result 83345 states and 109642 transitions. [2020-12-22 10:07:44,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 10:07:44,256 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 114 [2020-12-22 10:07:44,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:07:44,295 INFO L225 Difference]: With dead ends: 83345 [2020-12-22 10:07:44,295 INFO L226 Difference]: Without dead ends: 37954 [2020-12-22 10:07:44,315 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:07:44,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37954 states. [2020-12-22 10:07:48,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37954 to 37954. [2020-12-22 10:07:48,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37954 states. [2020-12-22 10:07:48,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37954 states to 37954 states and 49589 transitions. [2020-12-22 10:07:48,683 INFO L78 Accepts]: Start accepts. Automaton has 37954 states and 49589 transitions. Word has length 114 [2020-12-22 10:07:48,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:07:48,683 INFO L481 AbstractCegarLoop]: Abstraction has 37954 states and 49589 transitions. [2020-12-22 10:07:48,684 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 10:07:48,684 INFO L276 IsEmpty]: Start isEmpty. Operand 37954 states and 49589 transitions. [2020-12-22 10:07:48,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-12-22 10:07:48,686 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:07:48,686 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:07:48,686 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-12-22 10:07:48,686 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:07:48,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:07:48,687 INFO L82 PathProgramCache]: Analyzing trace with hash -165021109, now seen corresponding path program 1 times [2020-12-22 10:07:48,687 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:07:48,687 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493812274] [2020-12-22 10:07:48,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:07:48,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:07:48,775 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-12-22 10:07:48,775 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493812274] [2020-12-22 10:07:48,775 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:07:48,775 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 10:07:48,775 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284207726] [2020-12-22 10:07:48,776 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 10:07:48,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:07:48,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 10:07:48,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 10:07:48,777 INFO L87 Difference]: Start difference. First operand 37954 states and 49589 transitions. Second operand 6 states. [2020-12-22 10:07:52,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:07:52,184 INFO L93 Difference]: Finished difference Result 65344 states and 85308 transitions. [2020-12-22 10:07:52,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 10:07:52,185 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 114 [2020-12-22 10:07:52,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:07:52,216 INFO L225 Difference]: With dead ends: 65344 [2020-12-22 10:07:52,216 INFO L226 Difference]: Without dead ends: 30493 [2020-12-22 10:07:52,233 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:07:52,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30493 states.