/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.8.ufo.UNBOUNDED.pals+Problem12_label07.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 10:25:38,752 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 10:25:38,755 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 10:25:38,791 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 10:25:38,792 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 10:25:38,794 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 10:25:38,796 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 10:25:38,798 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 10:25:38,801 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 10:25:38,802 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 10:25:38,804 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 10:25:38,805 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 10:25:38,806 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 10:25:38,807 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 10:25:38,809 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 10:25:38,810 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 10:25:38,811 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 10:25:38,813 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 10:25:38,830 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 10:25:38,833 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 10:25:38,835 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 10:25:38,837 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 10:25:38,838 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 10:25:38,840 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 10:25:38,844 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 10:25:38,857 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 10:25:38,858 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 10:25:38,859 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 10:25:38,860 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 10:25:38,888 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 10:25:38,889 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 10:25:38,890 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 10:25:38,891 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 10:25:38,891 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 10:25:38,892 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 10:25:38,895 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 10:25:38,895 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 10:25:38,896 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 10:25:38,896 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 10:25:38,896 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 10:25:38,896 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 10:25:38,897 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 10:25:38,897 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 10:25:38,897 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 10:25:38,897 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 10:25:38,898 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 10:25:38,898 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 10:25:38,899 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 10:25:38,899 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 10:25:38,900 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 10:25:38,900 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 10:25:38,900 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 10:25:38,900 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 10:25:38,901 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 10:25:38,901 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 10:25:39,347 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 10:25:39,373 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 10:25:39,376 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 10:25:39,377 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 10:25:39,378 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 10:25:39,379 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pals_lcr.8.ufo.UNBOUNDED.pals+Problem12_label07.c [2020-12-22 10:25:39,470 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d516b1deb/b2e7870e77974fed9b6d66872cb33ea5/FLAGb2a96d549 [2020-12-22 10:25:40,509 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 10:25:40,510 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.8.ufo.UNBOUNDED.pals+Problem12_label07.c [2020-12-22 10:25:40,557 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d516b1deb/b2e7870e77974fed9b6d66872cb33ea5/FLAGb2a96d549 [2020-12-22 10:25:40,970 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d516b1deb/b2e7870e77974fed9b6d66872cb33ea5 [2020-12-22 10:25:40,973 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 10:25:40,976 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 10:25:40,977 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 10:25:40,978 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 10:25:40,982 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 10:25:40,983 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 10:25:40" (1/1) ... [2020-12-22 10:25:40,984 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@23bb6ef6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:25:40, skipping insertion in model container [2020-12-22 10:25:40,985 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 10:25:40" (1/1) ... [2020-12-22 10:25:40,994 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 10:25:41,216 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 10:25:41,625 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.8.ufo.UNBOUNDED.pals+Problem12_label07.c[26875,26888] [2020-12-22 10:25:41,654 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.8.ufo.UNBOUNDED.pals+Problem12_label07.c[27474,27487] [2020-12-22 10:25:42,598 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 10:25:42,616 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 10:25:42,714 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.8.ufo.UNBOUNDED.pals+Problem12_label07.c[26875,26888] [2020-12-22 10:25:42,716 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.8.ufo.UNBOUNDED.pals+Problem12_label07.c[27474,27487] [2020-12-22 10:25:43,384 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 10:25:43,431 INFO L208 MainTranslator]: Completed translation [2020-12-22 10:25:43,431 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:25:43 WrapperNode [2020-12-22 10:25:43,432 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 10:25:43,434 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 10:25:43,435 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 10:25:43,435 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 10:25:43,448 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:25:43" (1/1) ... [2020-12-22 10:25:43,512 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:25:43" (1/1) ... [2020-12-22 10:25:44,005 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 10:25:44,006 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 10:25:44,006 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 10:25:44,007 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 10:25:44,018 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:25:43" (1/1) ... [2020-12-22 10:25:44,018 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:25:43" (1/1) ... [2020-12-22 10:25:44,227 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:25:43" (1/1) ... [2020-12-22 10:25:44,227 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:25:43" (1/1) ... [2020-12-22 10:25:44,448 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:25:43" (1/1) ... [2020-12-22 10:25:44,498 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:25:43" (1/1) ... [2020-12-22 10:25:44,547 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:25:43" (1/1) ... [2020-12-22 10:25:44,610 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 10:25:44,612 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 10:25:44,612 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 10:25:44,613 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 10:25:44,614 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:25:43" (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 10:25:44,745 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 10:25:44,745 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 10:25:44,746 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 10:25:44,747 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 10:25:52,447 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 10:25:52,448 INFO L299 CfgBuilder]: Removed 42 assume(true) statements. [2020-12-22 10:25:52,452 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 10:25:52 BoogieIcfgContainer [2020-12-22 10:25:52,452 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 10:25:52,454 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 10:25:52,454 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 10:25:52,458 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 10:25:52,459 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 10:25:40" (1/3) ... [2020-12-22 10:25:52,460 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@758135a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 10:25:52, skipping insertion in model container [2020-12-22 10:25:52,460 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:25:43" (2/3) ... [2020-12-22 10:25:52,460 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@758135a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 10:25:52, skipping insertion in model container [2020-12-22 10:25:52,460 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 10:25:52" (3/3) ... [2020-12-22 10:25:52,462 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.8.ufo.UNBOUNDED.pals+Problem12_label07.c [2020-12-22 10:25:52,470 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 10:25:52,476 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-22 10:25:52,497 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-22 10:25:52,534 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 10:25:52,534 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 10:25:52,534 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 10:25:52,534 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 10:25:52,534 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 10:25:52,535 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 10:25:52,535 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 10:25:52,535 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 10:25:52,571 INFO L276 IsEmpty]: Start isEmpty. Operand 964 states. [2020-12-22 10:25:52,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-22 10:25:52,577 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:25:52,581 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:25:52,582 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:25:52,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:25:52,589 INFO L82 PathProgramCache]: Analyzing trace with hash -1817059990, now seen corresponding path program 1 times [2020-12-22 10:25:52,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:25:52,601 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420648868] [2020-12-22 10:25:52,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:25:52,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:25:52,990 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 10:25:52,991 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420648868] [2020-12-22 10:25:52,993 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:25:52,993 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 10:25:52,994 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510991277] [2020-12-22 10:25:52,999 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:25:53,001 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:25:53,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:25:53,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:25:53,023 INFO L87 Difference]: Start difference. First operand 964 states. Second operand 3 states. [2020-12-22 10:26:02,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:26:02,285 INFO L93 Difference]: Finished difference Result 2630 states and 5032 transitions. [2020-12-22 10:26:02,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:26:02,287 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 7 [2020-12-22 10:26:02,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:26:02,337 INFO L225 Difference]: With dead ends: 2630 [2020-12-22 10:26:02,338 INFO L226 Difference]: Without dead ends: 1649 [2020-12-22 10:26:02,348 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 10:26:02,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1649 states. [2020-12-22 10:26:02,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1649 to 1649. [2020-12-22 10:26:02,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1649 states. [2020-12-22 10:26:02,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1649 states to 1649 states and 2669 transitions. [2020-12-22 10:26:02,523 INFO L78 Accepts]: Start accepts. Automaton has 1649 states and 2669 transitions. Word has length 7 [2020-12-22 10:26:02,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:26:02,524 INFO L481 AbstractCegarLoop]: Abstraction has 1649 states and 2669 transitions. [2020-12-22 10:26:02,524 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:26:02,524 INFO L276 IsEmpty]: Start isEmpty. Operand 1649 states and 2669 transitions. [2020-12-22 10:26:02,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-12-22 10:26:02,529 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:26:02,530 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:26:02,530 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 10:26:02,530 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:26:02,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:26:02,533 INFO L82 PathProgramCache]: Analyzing trace with hash 2117945689, now seen corresponding path program 1 times [2020-12-22 10:26:02,534 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:26:02,534 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897496189] [2020-12-22 10:26:02,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:26:02,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:26:02,804 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 10:26:02,805 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897496189] [2020-12-22 10:26:02,805 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:26:02,805 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 10:26:02,806 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824869383] [2020-12-22 10:26:02,808 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 10:26:02,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:26:02,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 10:26:02,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 10:26:02,810 INFO L87 Difference]: Start difference. First operand 1649 states and 2669 transitions. Second operand 5 states. [2020-12-22 10:26:03,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:26:03,081 INFO L93 Difference]: Finished difference Result 1730 states and 2796 transitions. [2020-12-22 10:26:03,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 10:26:03,082 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 46 [2020-12-22 10:26:03,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:26:03,093 INFO L225 Difference]: With dead ends: 1730 [2020-12-22 10:26:03,094 INFO L226 Difference]: Without dead ends: 1649 [2020-12-22 10:26:03,096 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 10:26:03,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1649 states. [2020-12-22 10:26:03,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1649 to 1649. [2020-12-22 10:26:03,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1649 states. [2020-12-22 10:26:03,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1649 states to 1649 states and 2608 transitions. [2020-12-22 10:26:03,145 INFO L78 Accepts]: Start accepts. Automaton has 1649 states and 2608 transitions. Word has length 46 [2020-12-22 10:26:03,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:26:03,146 INFO L481 AbstractCegarLoop]: Abstraction has 1649 states and 2608 transitions. [2020-12-22 10:26:03,146 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 10:26:03,146 INFO L276 IsEmpty]: Start isEmpty. Operand 1649 states and 2608 transitions. [2020-12-22 10:26:03,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-12-22 10:26:03,153 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:26:03,154 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 10:26:03,155 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 10:26:03,155 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:26:03,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:26:03,157 INFO L82 PathProgramCache]: Analyzing trace with hash 1292840787, now seen corresponding path program 1 times [2020-12-22 10:26:03,158 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:26:03,158 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633962704] [2020-12-22 10:26:03,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:26:03,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:26:03,399 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:26:03,402 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633962704] [2020-12-22 10:26:03,402 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:26:03,402 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 10:26:03,403 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098667696] [2020-12-22 10:26:03,404 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:26:03,404 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:26:03,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:26:03,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:26:03,406 INFO L87 Difference]: Start difference. First operand 1649 states and 2608 transitions. Second operand 3 states. [2020-12-22 10:26:11,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:26:11,768 INFO L93 Difference]: Finished difference Result 4657 states and 7440 transitions. [2020-12-22 10:26:11,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:26:11,769 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 82 [2020-12-22 10:26:11,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:26:11,787 INFO L225 Difference]: With dead ends: 4657 [2020-12-22 10:26:11,787 INFO L226 Difference]: Without dead ends: 3153 [2020-12-22 10:26:11,790 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 10:26:11,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3153 states. [2020-12-22 10:26:11,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3153 to 3151. [2020-12-22 10:26:11,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3151 states. [2020-12-22 10:26:11,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3151 states to 3151 states and 4579 transitions. [2020-12-22 10:26:11,862 INFO L78 Accepts]: Start accepts. Automaton has 3151 states and 4579 transitions. Word has length 82 [2020-12-22 10:26:11,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:26:11,863 INFO L481 AbstractCegarLoop]: Abstraction has 3151 states and 4579 transitions. [2020-12-22 10:26:11,863 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:26:11,863 INFO L276 IsEmpty]: Start isEmpty. Operand 3151 states and 4579 transitions. [2020-12-22 10:26:11,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-12-22 10:26:11,866 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:26:11,866 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:26:11,866 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 10:26:11,866 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:26:11,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:26:11,867 INFO L82 PathProgramCache]: Analyzing trace with hash 211182729, now seen corresponding path program 1 times [2020-12-22 10:26:11,867 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:26:11,868 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539668942] [2020-12-22 10:26:11,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:26:11,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:26:11,982 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 10:26:11,982 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539668942] [2020-12-22 10:26:11,983 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:26:11,983 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:26:11,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169816791] [2020-12-22 10:26:11,984 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:26:11,984 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:26:11,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:26:11,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:26:11,985 INFO L87 Difference]: Start difference. First operand 3151 states and 4579 transitions. Second operand 3 states. [2020-12-22 10:26:12,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:26:12,029 INFO L93 Difference]: Finished difference Result 3299 states and 4815 transitions. [2020-12-22 10:26:12,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:26:12,030 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 106 [2020-12-22 10:26:12,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:26:12,047 INFO L225 Difference]: With dead ends: 3299 [2020-12-22 10:26:12,048 INFO L226 Difference]: Without dead ends: 3222 [2020-12-22 10:26:12,050 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 10:26:12,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3222 states. [2020-12-22 10:26:12,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3222 to 3220. [2020-12-22 10:26:12,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3220 states. [2020-12-22 10:26:12,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3220 states to 3220 states and 4690 transitions. [2020-12-22 10:26:12,127 INFO L78 Accepts]: Start accepts. Automaton has 3220 states and 4690 transitions. Word has length 106 [2020-12-22 10:26:12,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:26:12,127 INFO L481 AbstractCegarLoop]: Abstraction has 3220 states and 4690 transitions. [2020-12-22 10:26:12,128 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:26:12,128 INFO L276 IsEmpty]: Start isEmpty. Operand 3220 states and 4690 transitions. [2020-12-22 10:26:12,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-12-22 10:26:12,129 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:26:12,130 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:26:12,130 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 10:26:12,130 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:26:12,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:26:12,131 INFO L82 PathProgramCache]: Analyzing trace with hash 1458691583, now seen corresponding path program 1 times [2020-12-22 10:26:12,131 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:26:12,131 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978945045] [2020-12-22 10:26:12,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:26:12,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:26:12,230 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 10:26:12,230 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978945045] [2020-12-22 10:26:12,231 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:26:12,231 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:26:12,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49916295] [2020-12-22 10:26:12,232 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:26:12,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:26:12,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:26:12,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:26:12,233 INFO L87 Difference]: Start difference. First operand 3220 states and 4690 transitions. Second operand 3 states. [2020-12-22 10:26:12,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:26:12,283 INFO L93 Difference]: Finished difference Result 3500 states and 5138 transitions. [2020-12-22 10:26:12,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:26:12,284 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 106 [2020-12-22 10:26:12,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:26:12,301 INFO L225 Difference]: With dead ends: 3500 [2020-12-22 10:26:12,301 INFO L226 Difference]: Without dead ends: 3354 [2020-12-22 10:26:12,303 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 10:26:12,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3354 states. [2020-12-22 10:26:12,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3354 to 3352. [2020-12-22 10:26:12,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3352 states. [2020-12-22 10:26:12,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3352 states to 3352 states and 4901 transitions. [2020-12-22 10:26:12,387 INFO L78 Accepts]: Start accepts. Automaton has 3352 states and 4901 transitions. Word has length 106 [2020-12-22 10:26:12,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:26:12,387 INFO L481 AbstractCegarLoop]: Abstraction has 3352 states and 4901 transitions. [2020-12-22 10:26:12,388 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:26:12,388 INFO L276 IsEmpty]: Start isEmpty. Operand 3352 states and 4901 transitions. [2020-12-22 10:26:12,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-12-22 10:26:12,389 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:26:12,389 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:26:12,389 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 10:26:12,390 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:26:12,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:26:12,390 INFO L82 PathProgramCache]: Analyzing trace with hash 717259381, now seen corresponding path program 1 times [2020-12-22 10:26:12,390 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:26:12,391 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542915557] [2020-12-22 10:26:12,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:26:12,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:26:12,528 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 10:26:12,528 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542915557] [2020-12-22 10:26:12,529 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:26:12,529 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:26:12,529 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116868277] [2020-12-22 10:26:12,530 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:26:12,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:26:12,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:26:12,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:26:12,532 INFO L87 Difference]: Start difference. First operand 3352 states and 4901 transitions. Second operand 3 states. [2020-12-22 10:26:12,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:26:12,587 INFO L93 Difference]: Finished difference Result 3884 states and 5751 transitions. [2020-12-22 10:26:12,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:26:12,588 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 106 [2020-12-22 10:26:12,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:26:12,607 INFO L225 Difference]: With dead ends: 3884 [2020-12-22 10:26:12,607 INFO L226 Difference]: Without dead ends: 3606 [2020-12-22 10:26:12,609 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 10:26:12,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3606 states. [2020-12-22 10:26:12,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3606 to 3604. [2020-12-22 10:26:12,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3604 states. [2020-12-22 10:26:12,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3604 states to 3604 states and 5301 transitions. [2020-12-22 10:26:12,701 INFO L78 Accepts]: Start accepts. Automaton has 3604 states and 5301 transitions. Word has length 106 [2020-12-22 10:26:12,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:26:12,703 INFO L481 AbstractCegarLoop]: Abstraction has 3604 states and 5301 transitions. [2020-12-22 10:26:12,703 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:26:12,703 INFO L276 IsEmpty]: Start isEmpty. Operand 3604 states and 5301 transitions. [2020-12-22 10:26:12,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-12-22 10:26:12,704 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:26:12,705 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:26:12,705 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 10:26:12,706 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:26:12,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:26:12,710 INFO L82 PathProgramCache]: Analyzing trace with hash -28323349, now seen corresponding path program 1 times [2020-12-22 10:26:12,710 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:26:12,710 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169080372] [2020-12-22 10:26:12,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:26:12,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:26:12,852 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 10:26:12,853 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169080372] [2020-12-22 10:26:12,854 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:26:12,854 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:26:12,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564159908] [2020-12-22 10:26:12,855 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:26:12,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:26:12,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:26:12,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:26:12,857 INFO L87 Difference]: Start difference. First operand 3604 states and 5301 transitions. Second operand 3 states. [2020-12-22 10:26:12,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:26:12,923 INFO L93 Difference]: Finished difference Result 4616 states and 6911 transitions. [2020-12-22 10:26:12,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:26:12,924 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 106 [2020-12-22 10:26:12,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:26:12,944 INFO L225 Difference]: With dead ends: 4616 [2020-12-22 10:26:12,945 INFO L226 Difference]: Without dead ends: 4086 [2020-12-22 10:26:12,948 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 10:26:12,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4086 states. [2020-12-22 10:26:13,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4086 to 4084. [2020-12-22 10:26:13,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4084 states. [2020-12-22 10:26:13,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4084 states to 4084 states and 6057 transitions. [2020-12-22 10:26:13,071 INFO L78 Accepts]: Start accepts. Automaton has 4084 states and 6057 transitions. Word has length 106 [2020-12-22 10:26:13,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:26:13,071 INFO L481 AbstractCegarLoop]: Abstraction has 4084 states and 6057 transitions. [2020-12-22 10:26:13,071 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:26:13,071 INFO L276 IsEmpty]: Start isEmpty. Operand 4084 states and 6057 transitions. [2020-12-22 10:26:13,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-12-22 10:26:13,074 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:26:13,074 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:26:13,074 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 10:26:13,075 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:26:13,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:26:13,075 INFO L82 PathProgramCache]: Analyzing trace with hash -1968354207, now seen corresponding path program 1 times [2020-12-22 10:26:13,076 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:26:13,076 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139426911] [2020-12-22 10:26:13,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:26:13,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:26:13,187 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 10:26:13,188 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139426911] [2020-12-22 10:26:13,188 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:26:13,188 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:26:13,188 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465342539] [2020-12-22 10:26:13,189 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:26:13,189 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:26:13,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:26:13,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:26:13,190 INFO L87 Difference]: Start difference. First operand 4084 states and 6057 transitions. Second operand 3 states. [2020-12-22 10:26:13,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:26:13,280 INFO L93 Difference]: Finished difference Result 6008 states and 9099 transitions. [2020-12-22 10:26:13,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:26:13,281 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 106 [2020-12-22 10:26:13,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:26:13,313 INFO L225 Difference]: With dead ends: 6008 [2020-12-22 10:26:13,313 INFO L226 Difference]: Without dead ends: 4998 [2020-12-22 10:26:13,319 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 10:26:13,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4998 states. [2020-12-22 10:26:13,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4998 to 4996. [2020-12-22 10:26:13,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4996 states. [2020-12-22 10:26:13,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4996 states to 4996 states and 7481 transitions. [2020-12-22 10:26:13,477 INFO L78 Accepts]: Start accepts. Automaton has 4996 states and 7481 transitions. Word has length 106 [2020-12-22 10:26:13,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:26:13,477 INFO L481 AbstractCegarLoop]: Abstraction has 4996 states and 7481 transitions. [2020-12-22 10:26:13,477 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:26:13,477 INFO L276 IsEmpty]: Start isEmpty. Operand 4996 states and 7481 transitions. [2020-12-22 10:26:13,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-12-22 10:26:13,479 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:26:13,479 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:26:13,479 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 10:26:13,479 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:26:13,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:26:13,480 INFO L82 PathProgramCache]: Analyzing trace with hash 732328407, now seen corresponding path program 1 times [2020-12-22 10:26:13,480 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:26:13,480 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028937555] [2020-12-22 10:26:13,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:26:13,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:26:13,577 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 10:26:13,578 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028937555] [2020-12-22 10:26:13,578 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:26:13,578 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:26:13,579 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274004411] [2020-12-22 10:26:13,579 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:26:13,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:26:13,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:26:13,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:26:13,580 INFO L87 Difference]: Start difference. First operand 4996 states and 7481 transitions. Second operand 3 states. [2020-12-22 10:26:13,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:26:13,741 INFO L93 Difference]: Finished difference Result 8648 states and 13211 transitions. [2020-12-22 10:26:13,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:26:13,742 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 106 [2020-12-22 10:26:13,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:26:13,768 INFO L225 Difference]: With dead ends: 8648 [2020-12-22 10:26:13,768 INFO L226 Difference]: Without dead ends: 6726 [2020-12-22 10:26:13,774 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 10:26:13,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6726 states. [2020-12-22 10:26:14,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6726 to 6724. [2020-12-22 10:26:14,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6724 states. [2020-12-22 10:26:14,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6724 states to 6724 states and 10153 transitions. [2020-12-22 10:26:14,095 INFO L78 Accepts]: Start accepts. Automaton has 6724 states and 10153 transitions. Word has length 106 [2020-12-22 10:26:14,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:26:14,096 INFO L481 AbstractCegarLoop]: Abstraction has 6724 states and 10153 transitions. [2020-12-22 10:26:14,096 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:26:14,096 INFO L276 IsEmpty]: Start isEmpty. Operand 6724 states and 10153 transitions. [2020-12-22 10:26:14,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-12-22 10:26:14,097 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:26:14,098 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:26:14,098 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 10:26:14,100 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:26:14,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:26:14,101 INFO L82 PathProgramCache]: Analyzing trace with hash 1070121549, now seen corresponding path program 1 times [2020-12-22 10:26:14,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:26:14,101 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553002183] [2020-12-22 10:26:14,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:26:14,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:26:14,208 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 10:26:14,209 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553002183] [2020-12-22 10:26:14,209 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:26:14,209 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:26:14,210 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381459786] [2020-12-22 10:26:14,210 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:26:14,210 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:26:14,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:26:14,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:26:14,216 INFO L87 Difference]: Start difference. First operand 6724 states and 10153 transitions. Second operand 3 states. [2020-12-22 10:26:14,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:26:14,474 INFO L93 Difference]: Finished difference Result 13640 states and 20907 transitions. [2020-12-22 10:26:14,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:26:14,475 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 106 [2020-12-22 10:26:14,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:26:14,505 INFO L225 Difference]: With dead ends: 13640 [2020-12-22 10:26:14,505 INFO L226 Difference]: Without dead ends: 9990 [2020-12-22 10:26:14,514 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 10:26:14,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9990 states. [2020-12-22 10:26:14,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9990 to 9988. [2020-12-22 10:26:14,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9988 states. [2020-12-22 10:26:14,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9988 states to 9988 states and 15145 transitions. [2020-12-22 10:26:14,912 INFO L78 Accepts]: Start accepts. Automaton has 9988 states and 15145 transitions. Word has length 106 [2020-12-22 10:26:14,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:26:14,913 INFO L481 AbstractCegarLoop]: Abstraction has 9988 states and 15145 transitions. [2020-12-22 10:26:14,913 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:26:14,913 INFO L276 IsEmpty]: Start isEmpty. Operand 9988 states and 15145 transitions. [2020-12-22 10:26:14,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-12-22 10:26:14,914 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:26:14,914 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:26:14,914 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 10:26:14,915 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:26:14,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:26:14,915 INFO L82 PathProgramCache]: Analyzing trace with hash 1478760321, now seen corresponding path program 1 times [2020-12-22 10:26:14,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:26:14,916 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764319452] [2020-12-22 10:26:14,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:26:14,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:26:15,165 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 10:26:15,166 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764319452] [2020-12-22 10:26:15,166 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:26:15,166 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-12-22 10:26:15,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537162313] [2020-12-22 10:26:15,167 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 10:26:15,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:26:15,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 10:26:15,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-12-22 10:26:15,170 INFO L87 Difference]: Start difference. First operand 9988 states and 15145 transitions. Second operand 10 states. [2020-12-22 10:26:16,307 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2020-12-22 10:26:19,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:26:19,433 INFO L93 Difference]: Finished difference Result 120612 states and 186169 transitions. [2020-12-22 10:26:19,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-22 10:26:19,435 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 106 [2020-12-22 10:26:19,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:26:19,777 INFO L225 Difference]: With dead ends: 120612 [2020-12-22 10:26:19,777 INFO L226 Difference]: Without dead ends: 113698 [2020-12-22 10:26:19,821 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=162, Invalid=344, Unknown=0, NotChecked=0, Total=506 [2020-12-22 10:26:19,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113698 states. [2020-12-22 10:26:22,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113698 to 16900. [2020-12-22 10:26:22,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16900 states. [2020-12-22 10:26:22,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16900 states to 16900 states and 25577 transitions. [2020-12-22 10:26:22,241 INFO L78 Accepts]: Start accepts. Automaton has 16900 states and 25577 transitions. Word has length 106 [2020-12-22 10:26:22,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:26:22,242 INFO L481 AbstractCegarLoop]: Abstraction has 16900 states and 25577 transitions. [2020-12-22 10:26:22,242 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 10:26:22,242 INFO L276 IsEmpty]: Start isEmpty. Operand 16900 states and 25577 transitions. [2020-12-22 10:26:22,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-12-22 10:26:22,244 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:26:22,244 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:26:22,245 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 10:26:22,245 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:26:22,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:26:22,246 INFO L82 PathProgramCache]: Analyzing trace with hash -1961193007, now seen corresponding path program 1 times [2020-12-22 10:26:22,246 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:26:22,247 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90780491] [2020-12-22 10:26:22,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:26:22,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:26:22,465 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 10:26:22,465 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90780491] [2020-12-22 10:26:22,466 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:26:22,466 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:26:22,466 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475009743] [2020-12-22 10:26:22,467 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:26:22,467 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:26:22,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:26:22,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:26:22,472 INFO L87 Difference]: Start difference. First operand 16900 states and 25577 transitions. Second operand 3 states. [2020-12-22 10:26:23,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:26:23,712 INFO L93 Difference]: Finished difference Result 43144 states and 65387 transitions. [2020-12-22 10:26:23,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:26:23,713 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 108 [2020-12-22 10:26:23,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:26:23,785 INFO L225 Difference]: With dead ends: 43144 [2020-12-22 10:26:23,785 INFO L226 Difference]: Without dead ends: 29318 [2020-12-22 10:26:23,813 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 10:26:23,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29318 states. [2020-12-22 10:26:25,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29318 to 29060. [2020-12-22 10:26:25,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29060 states. [2020-12-22 10:26:25,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29060 states to 29060 states and 43369 transitions. [2020-12-22 10:26:25,210 INFO L78 Accepts]: Start accepts. Automaton has 29060 states and 43369 transitions. Word has length 108 [2020-12-22 10:26:25,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:26:25,210 INFO L481 AbstractCegarLoop]: Abstraction has 29060 states and 43369 transitions. [2020-12-22 10:26:25,210 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:26:25,210 INFO L276 IsEmpty]: Start isEmpty. Operand 29060 states and 43369 transitions. [2020-12-22 10:26:25,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-12-22 10:26:25,211 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:26:25,212 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:26:25,212 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 10:26:25,212 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:26:25,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:26:25,213 INFO L82 PathProgramCache]: Analyzing trace with hash -1894699495, now seen corresponding path program 1 times [2020-12-22 10:26:25,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:26:25,213 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427954976] [2020-12-22 10:26:25,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:26:25,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:26:25,819 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 10:26:25,819 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427954976] [2020-12-22 10:26:25,819 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:26:25,820 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-12-22 10:26:25,820 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101688808] [2020-12-22 10:26:25,820 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 10:26:25,821 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:26:25,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 10:26:25,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-12-22 10:26:25,822 INFO L87 Difference]: Start difference. First operand 29060 states and 43369 transitions. Second operand 10 states. [2020-12-22 10:26:26,256 WARN L197 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2020-12-22 10:26:26,401 WARN L197 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-12-22 10:26:26,573 WARN L197 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-12-22 10:26:27,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:26:27,908 INFO L93 Difference]: Finished difference Result 55048 states and 82283 transitions. [2020-12-22 10:26:27,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 10:26:27,909 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 108 [2020-12-22 10:26:27,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:26:27,967 INFO L225 Difference]: With dead ends: 55048 [2020-12-22 10:26:27,968 INFO L226 Difference]: Without dead ends: 29062 [2020-12-22 10:26:28,001 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2020-12-22 10:26:28,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29062 states. [2020-12-22 10:26:29,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29062 to 29060. [2020-12-22 10:26:29,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29060 states. [2020-12-22 10:26:29,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29060 states to 29060 states and 43113 transitions. [2020-12-22 10:26:29,704 INFO L78 Accepts]: Start accepts. Automaton has 29060 states and 43113 transitions. Word has length 108 [2020-12-22 10:26:29,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:26:29,705 INFO L481 AbstractCegarLoop]: Abstraction has 29060 states and 43113 transitions. [2020-12-22 10:26:29,705 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 10:26:29,705 INFO L276 IsEmpty]: Start isEmpty. Operand 29060 states and 43113 transitions. [2020-12-22 10:26:29,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-12-22 10:26:29,707 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:26:29,707 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:26:29,707 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 10:26:29,707 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:26:29,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:26:29,708 INFO L82 PathProgramCache]: Analyzing trace with hash 979135041, now seen corresponding path program 1 times [2020-12-22 10:26:29,708 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:26:29,709 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892324773] [2020-12-22 10:26:29,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:26:29,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:26:29,873 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 10:26:29,873 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892324773] [2020-12-22 10:26:29,874 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:26:29,874 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 10:26:29,874 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950374982] [2020-12-22 10:26:29,875 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 10:26:29,875 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:26:29,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 10:26:30,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 10:26:30,004 INFO L87 Difference]: Start difference. First operand 29060 states and 43113 transitions. Second operand 6 states. [2020-12-22 10:26:32,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:26:32,068 INFO L93 Difference]: Finished difference Result 55046 states and 81770 transitions. [2020-12-22 10:26:32,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 10:26:32,068 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 109 [2020-12-22 10:26:32,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:26:32,111 INFO L225 Difference]: With dead ends: 55046 [2020-12-22 10:26:32,112 INFO L226 Difference]: Without dead ends: 29060 [2020-12-22 10:26:32,138 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 10:26:32,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29060 states. [2020-12-22 10:26:33,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29060 to 29060. [2020-12-22 10:26:33,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29060 states. [2020-12-22 10:26:33,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29060 states to 29060 states and 42857 transitions. [2020-12-22 10:26:33,892 INFO L78 Accepts]: Start accepts. Automaton has 29060 states and 42857 transitions. Word has length 109 [2020-12-22 10:26:33,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:26:33,893 INFO L481 AbstractCegarLoop]: Abstraction has 29060 states and 42857 transitions. [2020-12-22 10:26:33,893 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 10:26:33,893 INFO L276 IsEmpty]: Start isEmpty. Operand 29060 states and 42857 transitions. [2020-12-22 10:26:33,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-12-22 10:26:33,894 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:26:33,895 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:26:33,895 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 10:26:33,895 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:26:33,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:26:33,896 INFO L82 PathProgramCache]: Analyzing trace with hash 278070463, now seen corresponding path program 1 times [2020-12-22 10:26:33,896 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:26:33,896 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245395860] [2020-12-22 10:26:33,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:26:33,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:26:34,213 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 10:26:34,213 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245395860] [2020-12-22 10:26:34,213 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:26:34,214 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 10:26:34,214 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788309076] [2020-12-22 10:26:34,214 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 10:26:34,214 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:26:34,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 10:26:34,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-12-22 10:26:34,215 INFO L87 Difference]: Start difference. First operand 29060 states and 42857 transitions. Second operand 8 states. [2020-12-22 10:26:37,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:26:37,279 INFO L93 Difference]: Finished difference Result 48430 states and 71070 transitions. [2020-12-22 10:26:37,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 10:26:37,280 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 109 [2020-12-22 10:26:37,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:26:37,333 INFO L225 Difference]: With dead ends: 48430 [2020-12-22 10:26:37,333 INFO L226 Difference]: Without dead ends: 48428 [2020-12-22 10:26:37,341 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2020-12-22 10:26:37,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48428 states. [2020-12-22 10:26:39,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48428 to 29828. [2020-12-22 10:26:39,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29828 states. [2020-12-22 10:26:39,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29828 states to 29828 states and 43497 transitions. [2020-12-22 10:26:39,215 INFO L78 Accepts]: Start accepts. Automaton has 29828 states and 43497 transitions. Word has length 109 [2020-12-22 10:26:39,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:26:39,216 INFO L481 AbstractCegarLoop]: Abstraction has 29828 states and 43497 transitions. [2020-12-22 10:26:39,216 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 10:26:39,216 INFO L276 IsEmpty]: Start isEmpty. Operand 29828 states and 43497 transitions. [2020-12-22 10:26:39,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-12-22 10:26:39,217 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:26:39,217 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:26:39,218 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 10:26:39,218 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:26:39,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:26:39,219 INFO L82 PathProgramCache]: Analyzing trace with hash 171324818, now seen corresponding path program 1 times [2020-12-22 10:26:39,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:26:39,219 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794519556] [2020-12-22 10:26:39,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:26:39,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:26:39,309 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 10:26:39,310 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794519556] [2020-12-22 10:26:39,310 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:26:39,310 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:26:39,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343762444] [2020-12-22 10:26:39,311 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:26:39,311 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:26:39,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:26:39,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:26:39,312 INFO L87 Difference]: Start difference. First operand 29828 states and 43497 transitions. Second operand 3 states. [2020-12-22 10:26:41,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:26:41,732 INFO L93 Difference]: Finished difference Result 56971 states and 83439 transitions. [2020-12-22 10:26:41,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:26:41,733 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 110 [2020-12-22 10:26:41,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:26:41,776 INFO L225 Difference]: With dead ends: 56971 [2020-12-22 10:26:41,776 INFO L226 Difference]: Without dead ends: 42376 [2020-12-22 10:26:41,786 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 10:26:41,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42376 states. [2020-12-22 10:26:44,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42376 to 42374. [2020-12-22 10:26:44,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42374 states. [2020-12-22 10:26:44,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42374 states to 42374 states and 61547 transitions. [2020-12-22 10:26:44,503 INFO L78 Accepts]: Start accepts. Automaton has 42374 states and 61547 transitions. Word has length 110 [2020-12-22 10:26:44,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:26:44,504 INFO L481 AbstractCegarLoop]: Abstraction has 42374 states and 61547 transitions. [2020-12-22 10:26:44,504 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:26:44,504 INFO L276 IsEmpty]: Start isEmpty. Operand 42374 states and 61547 transitions. [2020-12-22 10:26:44,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-12-22 10:26:44,505 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:26:44,505 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:26:44,505 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 10:26:44,505 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:26:44,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:26:44,506 INFO L82 PathProgramCache]: Analyzing trace with hash 1380927042, now seen corresponding path program 1 times [2020-12-22 10:26:44,506 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:26:44,506 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814973489] [2020-12-22 10:26:44,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:26:44,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:26:44,705 WARN L197 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2020-12-22 10:26:44,750 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:26:44,751 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814973489] [2020-12-22 10:26:44,751 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:26:44,751 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:26:44,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594043913] [2020-12-22 10:26:44,752 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 10:26:44,752 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:26:44,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 10:26:44,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 10:26:44,753 INFO L87 Difference]: Start difference. First operand 42374 states and 61547 transitions. Second operand 4 states. [2020-12-22 10:27:01,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:27:01,505 INFO L93 Difference]: Finished difference Result 49135 states and 71191 transitions. [2020-12-22 10:27:01,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 10:27:01,507 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 111 [2020-12-22 10:27:01,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:27:01,548 INFO L225 Difference]: With dead ends: 49135 [2020-12-22 10:27:01,549 INFO L226 Difference]: Without dead ends: 46129 [2020-12-22 10:27:01,556 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 10:27:01,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46129 states. [2020-12-22 10:27:04,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46129 to 46129. [2020-12-22 10:27:04,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46129 states. [2020-12-22 10:27:04,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46129 states to 46129 states and 66546 transitions. [2020-12-22 10:27:04,231 INFO L78 Accepts]: Start accepts. Automaton has 46129 states and 66546 transitions. Word has length 111 [2020-12-22 10:27:04,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:27:04,232 INFO L481 AbstractCegarLoop]: Abstraction has 46129 states and 66546 transitions. [2020-12-22 10:27:04,232 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 10:27:04,232 INFO L276 IsEmpty]: Start isEmpty. Operand 46129 states and 66546 transitions. [2020-12-22 10:27:04,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-12-22 10:27:04,253 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:27:04,254 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:27:04,254 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 10:27:04,254 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:27:04,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:27:04,255 INFO L82 PathProgramCache]: Analyzing trace with hash 45078639, now seen corresponding path program 1 times [2020-12-22 10:27:04,255 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:27:04,256 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025884099] [2020-12-22 10:27:04,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:27:04,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:27:04,510 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-12-22 10:27:04,510 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025884099] [2020-12-22 10:27:04,511 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:27:04,511 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-12-22 10:27:04,511 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457586111] [2020-12-22 10:27:04,511 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 10:27:04,512 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:27:04,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 10:27:04,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-12-22 10:27:04,512 INFO L87 Difference]: Start difference. First operand 46129 states and 66546 transitions. Second operand 10 states. [2020-12-22 10:27:24,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:27:24,662 INFO L93 Difference]: Finished difference Result 368067 states and 533883 transitions. [2020-12-22 10:27:24,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 10:27:24,663 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 148 [2020-12-22 10:27:24,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:27:25,349 INFO L225 Difference]: With dead ends: 368067 [2020-12-22 10:27:25,350 INFO L226 Difference]: Without dead ends: 328769 [2020-12-22 10:27:25,452 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:27:25,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328769 states. [2020-12-22 10:27:33,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328769 to 85425. [2020-12-22 10:27:33,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85425 states. [2020-12-22 10:27:33,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85425 states to 85425 states and 123250 transitions. [2020-12-22 10:27:33,814 INFO L78 Accepts]: Start accepts. Automaton has 85425 states and 123250 transitions. Word has length 148 [2020-12-22 10:27:33,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:27:33,814 INFO L481 AbstractCegarLoop]: Abstraction has 85425 states and 123250 transitions. [2020-12-22 10:27:33,815 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 10:27:33,815 INFO L276 IsEmpty]: Start isEmpty. Operand 85425 states and 123250 transitions. [2020-12-22 10:27:33,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-12-22 10:27:33,839 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:27:33,840 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:27:33,840 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 10:27:33,840 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:27:33,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:27:33,841 INFO L82 PathProgramCache]: Analyzing trace with hash -1723704177, now seen corresponding path program 1 times [2020-12-22 10:27:33,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:27:33,842 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329931389] [2020-12-22 10:27:33,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:27:33,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:27:34,108 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 10:27:34,109 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329931389] [2020-12-22 10:27:34,110 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:27:34,110 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-12-22 10:27:34,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532227964] [2020-12-22 10:27:34,112 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 10:27:34,112 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:27:34,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 10:27:34,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-12-22 10:27:34,113 INFO L87 Difference]: Start difference. First operand 85425 states and 123250 transitions. Second operand 10 states. [2020-12-22 10:28:00,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:28:00,767 INFO L93 Difference]: Finished difference Result 407363 states and 590587 transitions. [2020-12-22 10:28:00,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 10:28:00,768 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 148 [2020-12-22 10:28:00,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:28:01,480 INFO L225 Difference]: With dead ends: 407363 [2020-12-22 10:28:01,481 INFO L226 Difference]: Without dead ends: 368065 [2020-12-22 10:28:01,603 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:28:01,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368065 states. [2020-12-22 10:28:14,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368065 to 144433. [2020-12-22 10:28:14,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144433 states. [2020-12-22 10:28:14,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144433 states to 144433 states and 207986 transitions. [2020-12-22 10:28:14,969 INFO L78 Accepts]: Start accepts. Automaton has 144433 states and 207986 transitions. Word has length 148 [2020-12-22 10:28:14,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:28:14,969 INFO L481 AbstractCegarLoop]: Abstraction has 144433 states and 207986 transitions. [2020-12-22 10:28:14,969 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 10:28:14,969 INFO L276 IsEmpty]: Start isEmpty. Operand 144433 states and 207986 transitions. [2020-12-22 10:28:14,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-12-22 10:28:14,994 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:28:14,994 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:28:14,994 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 10:28:14,994 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:28:14,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:28:14,995 INFO L82 PathProgramCache]: Analyzing trace with hash -592064337, now seen corresponding path program 1 times [2020-12-22 10:28:14,995 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:28:14,995 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732138158] [2020-12-22 10:28:14,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:28:15,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:28:15,536 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-12-22 10:28:15,537 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732138158] [2020-12-22 10:28:15,537 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:28:15,537 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-12-22 10:28:15,537 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045601961] [2020-12-22 10:28:15,538 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 10:28:15,538 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:28:15,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 10:28:15,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-12-22 10:28:15,539 INFO L87 Difference]: Start difference. First operand 144433 states and 207986 transitions. Second operand 10 states. [2020-12-22 10:28:47,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:28:47,148 INFO L93 Difference]: Finished difference Result 446659 states and 647291 transitions. [2020-12-22 10:28:47,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 10:28:47,149 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 148 [2020-12-22 10:28:47,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:28:47,991 INFO L225 Difference]: With dead ends: 446659 [2020-12-22 10:28:47,991 INFO L226 Difference]: Without dead ends: 407361 [2020-12-22 10:28:48,105 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:28:48,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407361 states. [2020-12-22 10:29:05,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407361 to 183729. [2020-12-22 10:29:05,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183729 states. [2020-12-22 10:29:06,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183729 states to 183729 states and 264690 transitions. [2020-12-22 10:29:06,200 INFO L78 Accepts]: Start accepts. Automaton has 183729 states and 264690 transitions. Word has length 148 [2020-12-22 10:29:06,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:29:06,201 INFO L481 AbstractCegarLoop]: Abstraction has 183729 states and 264690 transitions. [2020-12-22 10:29:06,201 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 10:29:06,201 INFO L276 IsEmpty]: Start isEmpty. Operand 183729 states and 264690 transitions. [2020-12-22 10:29:06,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-12-22 10:29:06,229 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:29:06,229 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:29:06,229 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-12-22 10:29:06,230 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:29:06,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:29:06,230 INFO L82 PathProgramCache]: Analyzing trace with hash -1827523377, now seen corresponding path program 1 times [2020-12-22 10:29:06,231 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:29:06,247 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788099493] [2020-12-22 10:29:06,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:29:06,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:29:06,545 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 10:29:06,546 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788099493] [2020-12-22 10:29:06,546 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:29:06,546 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-12-22 10:29:06,547 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469267542] [2020-12-22 10:29:06,547 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 10:29:06,547 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:29:06,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 10:29:06,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-12-22 10:29:06,548 INFO L87 Difference]: Start difference. First operand 183729 states and 264690 transitions. Second operand 10 states.