/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.8.1.ufo.BOUNDED-16.pals+Problem12_label05.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 10:19:41,379 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 10:19:41,383 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 10:19:41,437 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 10:19:41,438 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 10:19:41,442 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 10:19:41,446 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 10:19:41,454 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 10:19:41,457 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 10:19:41,463 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 10:19:41,465 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 10:19:41,466 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 10:19:41,467 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 10:19:41,470 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 10:19:41,472 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 10:19:41,474 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 10:19:41,487 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 10:19:41,488 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 10:19:41,490 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 10:19:41,493 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 10:19:41,494 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 10:19:41,496 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 10:19:41,497 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 10:19:41,498 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 10:19:41,501 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 10:19:41,511 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 10:19:41,512 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 10:19:41,513 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 10:19:41,514 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 10:19:41,541 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 10:19:41,541 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 10:19:41,543 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 10:19:41,543 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 10:19:41,544 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 10:19:41,544 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 10:19:41,544 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 10:19:41,544 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 10:19:41,545 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 10:19:41,545 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 10:19:41,545 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 10:19:41,545 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 10:19:41,545 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 10:19:41,546 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 10:19:41,546 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 10:19:41,546 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 10:19:41,546 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 10:19:41,547 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 10:19:41,547 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 10:19:41,547 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 10:19:41,547 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 10:19:41,548 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 10:19:41,548 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 10:19:41,548 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 10:19:41,548 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 10:19:41,548 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 10:19:41,911 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 10:19:41,944 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 10:19:41,947 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 10:19:41,948 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 10:19:41,949 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 10:19:41,950 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pals_lcr.8.1.ufo.BOUNDED-16.pals+Problem12_label05.c [2020-12-22 10:19:42,051 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ddcbe280d/380fb9da83c5489098404441103fe7f2/FLAG70553ea41 [2020-12-22 10:19:43,317 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 10:19:43,318 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.8.1.ufo.BOUNDED-16.pals+Problem12_label05.c [2020-12-22 10:19:43,360 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ddcbe280d/380fb9da83c5489098404441103fe7f2/FLAG70553ea41 [2020-12-22 10:19:43,650 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ddcbe280d/380fb9da83c5489098404441103fe7f2 [2020-12-22 10:19:43,653 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 10:19:43,655 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 10:19:43,657 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 10:19:43,657 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 10:19:43,663 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 10:19:43,664 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 10:19:43" (1/1) ... [2020-12-22 10:19:43,665 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3eaaaefb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:19:43, skipping insertion in model container [2020-12-22 10:19:43,665 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 10:19:43" (1/1) ... [2020-12-22 10:19:43,674 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 10:19:43,874 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 10:19:44,389 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.8.1.ufo.BOUNDED-16.pals+Problem12_label05.c[26884,26897] [2020-12-22 10:19:44,457 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.8.1.ufo.BOUNDED-16.pals+Problem12_label05.c[33577,33590] [2020-12-22 10:19:45,585 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 10:19:45,601 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 10:19:45,680 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.8.1.ufo.BOUNDED-16.pals+Problem12_label05.c[26884,26897] [2020-12-22 10:19:45,730 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.8.1.ufo.BOUNDED-16.pals+Problem12_label05.c[33577,33590] [2020-12-22 10:19:46,434 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 10:19:46,479 INFO L208 MainTranslator]: Completed translation [2020-12-22 10:19:46,480 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:19:46 WrapperNode [2020-12-22 10:19:46,480 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 10:19:46,482 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 10:19:46,482 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 10:19:46,482 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 10:19:46,491 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:19:46" (1/1) ... [2020-12-22 10:19:46,582 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:19:46" (1/1) ... [2020-12-22 10:19:47,082 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 10:19:47,083 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 10:19:47,084 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 10:19:47,084 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 10:19:47,095 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:19:46" (1/1) ... [2020-12-22 10:19:47,095 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:19:46" (1/1) ... [2020-12-22 10:19:47,153 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:19:46" (1/1) ... [2020-12-22 10:19:47,153 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:19:46" (1/1) ... [2020-12-22 10:19:47,455 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:19:46" (1/1) ... [2020-12-22 10:19:47,500 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:19:46" (1/1) ... [2020-12-22 10:19:47,648 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:19:46" (1/1) ... [2020-12-22 10:19:47,755 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 10:19:47,757 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 10:19:47,757 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 10:19:47,757 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 10:19:47,758 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:19:46" (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 10:19:47,872 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 10:19:47,873 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 10:19:47,873 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 10:19:47,873 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 10:19:53,984 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 10:19:53,985 INFO L299 CfgBuilder]: Removed 42 assume(true) statements. [2020-12-22 10:19:53,989 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 10:19:53 BoogieIcfgContainer [2020-12-22 10:19:53,990 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 10:19:53,994 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 10:19:53,997 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 10:19:54,052 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 10:19:54,053 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 10:19:43" (1/3) ... [2020-12-22 10:19:54,059 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@489994e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 10:19:54, skipping insertion in model container [2020-12-22 10:19:54,059 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:19:46" (2/3) ... [2020-12-22 10:19:54,060 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@489994e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 10:19:54, skipping insertion in model container [2020-12-22 10:19:54,060 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 10:19:53" (3/3) ... [2020-12-22 10:19:54,065 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.8.1.ufo.BOUNDED-16.pals+Problem12_label05.c [2020-12-22 10:19:54,074 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 10:19:54,081 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-22 10:19:54,102 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-22 10:19:54,156 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 10:19:54,156 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 10:19:54,157 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 10:19:54,157 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 10:19:54,157 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 10:19:54,157 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 10:19:54,157 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 10:19:54,157 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 10:19:54,204 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states. [2020-12-22 10:19:54,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-12-22 10:19:54,226 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:19:54,227 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 10:19:54,227 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:19:54,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:19:54,236 INFO L82 PathProgramCache]: Analyzing trace with hash -2107180874, now seen corresponding path program 1 times [2020-12-22 10:19:54,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:19:54,248 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205844537] [2020-12-22 10:19:54,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:19:54,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:19:54,663 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 10:19:54,664 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205844537] [2020-12-22 10:19:54,665 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:19:54,665 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 10:19:54,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137042529] [2020-12-22 10:19:54,671 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 10:19:54,672 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:19:54,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 10:19:54,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 10:19:54,689 INFO L87 Difference]: Start difference. First operand 963 states. Second operand 2 states. [2020-12-22 10:19:54,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:19:54,789 INFO L93 Difference]: Finished difference Result 1859 states and 3512 transitions. [2020-12-22 10:19:54,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 10:19:54,791 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 46 [2020-12-22 10:19:54,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:19:54,818 INFO L225 Difference]: With dead ends: 1859 [2020-12-22 10:19:54,818 INFO L226 Difference]: Without dead ends: 897 [2020-12-22 10:19:54,826 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 10:19:54,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 897 states. [2020-12-22 10:19:54,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 897 to 897. [2020-12-22 10:19:54,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 897 states. [2020-12-22 10:19:54,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 897 states to 897 states and 1688 transitions. [2020-12-22 10:19:54,940 INFO L78 Accepts]: Start accepts. Automaton has 897 states and 1688 transitions. Word has length 46 [2020-12-22 10:19:54,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:19:54,941 INFO L481 AbstractCegarLoop]: Abstraction has 897 states and 1688 transitions. [2020-12-22 10:19:54,941 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 10:19:54,941 INFO L276 IsEmpty]: Start isEmpty. Operand 897 states and 1688 transitions. [2020-12-22 10:19:54,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-12-22 10:19:54,944 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:19:54,944 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 10:19:54,944 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 10:19:54,945 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:19:54,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:19:54,946 INFO L82 PathProgramCache]: Analyzing trace with hash 815979124, now seen corresponding path program 1 times [2020-12-22 10:19:54,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:19:54,946 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863132941] [2020-12-22 10:19:54,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:19:54,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:19:55,162 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 10:19:55,163 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863132941] [2020-12-22 10:19:55,164 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:19:55,164 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 10:19:55,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948868267] [2020-12-22 10:19:55,167 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 10:19:55,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:19:55,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 10:19:55,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 10:19:55,169 INFO L87 Difference]: Start difference. First operand 897 states and 1688 transitions. Second operand 5 states. [2020-12-22 10:19:55,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:19:55,445 INFO L93 Difference]: Finished difference Result 977 states and 1813 transitions. [2020-12-22 10:19:55,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 10:19:55,445 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 46 [2020-12-22 10:19:55,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:19:55,454 INFO L225 Difference]: With dead ends: 977 [2020-12-22 10:19:55,455 INFO L226 Difference]: Without dead ends: 897 [2020-12-22 10:19:55,458 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 10:19:55,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 897 states. [2020-12-22 10:19:55,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 897 to 897. [2020-12-22 10:19:55,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 897 states. [2020-12-22 10:19:55,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 897 states to 897 states and 1627 transitions. [2020-12-22 10:19:55,508 INFO L78 Accepts]: Start accepts. Automaton has 897 states and 1627 transitions. Word has length 46 [2020-12-22 10:19:55,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:19:55,508 INFO L481 AbstractCegarLoop]: Abstraction has 897 states and 1627 transitions. [2020-12-22 10:19:55,509 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 10:19:55,509 INFO L276 IsEmpty]: Start isEmpty. Operand 897 states and 1627 transitions. [2020-12-22 10:19:55,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-12-22 10:19:55,515 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:19:55,516 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] [2020-12-22 10:19:55,516 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 10:19:55,517 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:19:55,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:19:55,518 INFO L82 PathProgramCache]: Analyzing trace with hash 817411013, now seen corresponding path program 1 times [2020-12-22 10:19:55,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:19:55,519 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670348162] [2020-12-22 10:19:55,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:19:55,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:19:55,743 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 10:19:55,744 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670348162] [2020-12-22 10:19:55,745 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:19:55,745 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:19:55,745 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117981367] [2020-12-22 10:19:55,745 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 10:19:55,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:19:55,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 10:19:55,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 10:19:55,756 INFO L87 Difference]: Start difference. First operand 897 states and 1627 transitions. Second operand 4 states. [2020-12-22 10:20:07,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:20:07,148 INFO L93 Difference]: Finished difference Result 3152 states and 5936 transitions. [2020-12-22 10:20:07,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 10:20:07,149 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 60 [2020-12-22 10:20:07,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:20:07,164 INFO L225 Difference]: With dead ends: 3152 [2020-12-22 10:20:07,165 INFO L226 Difference]: Without dead ends: 2399 [2020-12-22 10:20:07,169 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 10:20:07,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2399 states. [2020-12-22 10:20:07,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2399 to 2399. [2020-12-22 10:20:07,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2399 states. [2020-12-22 10:20:07,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2399 states to 2399 states and 3753 transitions. [2020-12-22 10:20:07,253 INFO L78 Accepts]: Start accepts. Automaton has 2399 states and 3753 transitions. Word has length 60 [2020-12-22 10:20:07,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:20:07,254 INFO L481 AbstractCegarLoop]: Abstraction has 2399 states and 3753 transitions. [2020-12-22 10:20:07,254 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 10:20:07,254 INFO L276 IsEmpty]: Start isEmpty. Operand 2399 states and 3753 transitions. [2020-12-22 10:20:07,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-12-22 10:20:07,262 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:20:07,263 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 10:20:07,263 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 10:20:07,264 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:20:07,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:20:07,264 INFO L82 PathProgramCache]: Analyzing trace with hash -1090783836, now seen corresponding path program 1 times [2020-12-22 10:20:07,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:20:07,265 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738115752] [2020-12-22 10:20:07,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:20:07,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:20:07,491 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 10:20:07,492 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738115752] [2020-12-22 10:20:07,492 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:20:07,493 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:20:07,493 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806685347] [2020-12-22 10:20:07,493 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:20:07,494 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:20:07,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:20:07,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:20:07,495 INFO L87 Difference]: Start difference. First operand 2399 states and 3753 transitions. Second operand 3 states. [2020-12-22 10:20:07,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:20:07,537 INFO L93 Difference]: Finished difference Result 2545 states and 3985 transitions. [2020-12-22 10:20:07,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:20:07,538 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 106 [2020-12-22 10:20:07,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:20:07,552 INFO L225 Difference]: With dead ends: 2545 [2020-12-22 10:20:07,552 INFO L226 Difference]: Without dead ends: 2469 [2020-12-22 10:20:07,554 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 10:20:07,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2469 states. [2020-12-22 10:20:07,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2469 to 2467. [2020-12-22 10:20:07,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2467 states. [2020-12-22 10:20:07,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2467 states to 2467 states and 3862 transitions. [2020-12-22 10:20:07,618 INFO L78 Accepts]: Start accepts. Automaton has 2467 states and 3862 transitions. Word has length 106 [2020-12-22 10:20:07,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:20:07,619 INFO L481 AbstractCegarLoop]: Abstraction has 2467 states and 3862 transitions. [2020-12-22 10:20:07,620 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:20:07,620 INFO L276 IsEmpty]: Start isEmpty. Operand 2467 states and 3862 transitions. [2020-12-22 10:20:07,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-12-22 10:20:07,621 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:20:07,622 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 10:20:07,622 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 10:20:07,623 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:20:07,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:20:07,624 INFO L82 PathProgramCache]: Analyzing trace with hash 326222874, now seen corresponding path program 1 times [2020-12-22 10:20:07,624 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:20:07,624 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532305991] [2020-12-22 10:20:07,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:20:07,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:20:07,782 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 10:20:07,782 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532305991] [2020-12-22 10:20:07,783 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:20:07,783 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:20:07,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262081778] [2020-12-22 10:20:07,784 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:20:07,784 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:20:07,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:20:07,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:20:07,785 INFO L87 Difference]: Start difference. First operand 2467 states and 3862 transitions. Second operand 3 states. [2020-12-22 10:20:07,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:20:07,836 INFO L93 Difference]: Finished difference Result 2743 states and 4302 transitions. [2020-12-22 10:20:07,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:20:07,837 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 106 [2020-12-22 10:20:07,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:20:07,853 INFO L225 Difference]: With dead ends: 2743 [2020-12-22 10:20:07,854 INFO L226 Difference]: Without dead ends: 2599 [2020-12-22 10:20:07,856 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 10:20:07,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2599 states. [2020-12-22 10:20:07,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2599 to 2597. [2020-12-22 10:20:07,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2597 states. [2020-12-22 10:20:07,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2597 states to 2597 states and 4069 transitions. [2020-12-22 10:20:07,931 INFO L78 Accepts]: Start accepts. Automaton has 2597 states and 4069 transitions. Word has length 106 [2020-12-22 10:20:07,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:20:07,931 INFO L481 AbstractCegarLoop]: Abstraction has 2597 states and 4069 transitions. [2020-12-22 10:20:07,932 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:20:07,932 INFO L276 IsEmpty]: Start isEmpty. Operand 2597 states and 4069 transitions. [2020-12-22 10:20:07,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-12-22 10:20:07,941 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:20:07,941 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 10:20:07,941 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 10:20:07,941 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:20:07,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:20:07,942 INFO L82 PathProgramCache]: Analyzing trace with hash 1573731728, now seen corresponding path program 1 times [2020-12-22 10:20:07,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:20:07,943 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104669299] [2020-12-22 10:20:07,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:20:07,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:20:08,083 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 10:20:08,084 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104669299] [2020-12-22 10:20:08,084 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:20:08,085 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:20:08,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930088489] [2020-12-22 10:20:08,086 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:20:08,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:20:08,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:20:08,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:20:08,088 INFO L87 Difference]: Start difference. First operand 2597 states and 4069 transitions. Second operand 3 states. [2020-12-22 10:20:08,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:20:08,158 INFO L93 Difference]: Finished difference Result 3121 states and 4903 transitions. [2020-12-22 10:20:08,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:20:08,159 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 106 [2020-12-22 10:20:08,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:20:08,179 INFO L225 Difference]: With dead ends: 3121 [2020-12-22 10:20:08,180 INFO L226 Difference]: Without dead ends: 2847 [2020-12-22 10:20:08,182 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 10:20:08,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2847 states. [2020-12-22 10:20:08,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2847 to 2845. [2020-12-22 10:20:08,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2845 states. [2020-12-22 10:20:08,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2845 states to 2845 states and 4461 transitions. [2020-12-22 10:20:08,272 INFO L78 Accepts]: Start accepts. Automaton has 2845 states and 4461 transitions. Word has length 106 [2020-12-22 10:20:08,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:20:08,274 INFO L481 AbstractCegarLoop]: Abstraction has 2845 states and 4461 transitions. [2020-12-22 10:20:08,274 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:20:08,274 INFO L276 IsEmpty]: Start isEmpty. Operand 2845 states and 4461 transitions. [2020-12-22 10:20:08,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-12-22 10:20:08,275 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:20:08,275 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 10:20:08,276 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 10:20:08,281 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:20:08,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:20:08,281 INFO L82 PathProgramCache]: Analyzing trace with hash 832299526, now seen corresponding path program 1 times [2020-12-22 10:20:08,282 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:20:08,284 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617496060] [2020-12-22 10:20:08,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:20:08,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:20:08,411 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 10:20:08,412 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617496060] [2020-12-22 10:20:08,413 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:20:08,413 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:20:08,413 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493014353] [2020-12-22 10:20:08,414 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:20:08,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:20:08,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:20:08,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:20:08,415 INFO L87 Difference]: Start difference. First operand 2845 states and 4461 transitions. Second operand 3 states. [2020-12-22 10:20:08,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:20:08,482 INFO L93 Difference]: Finished difference Result 3841 states and 6039 transitions. [2020-12-22 10:20:08,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:20:08,483 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 106 [2020-12-22 10:20:08,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:20:08,502 INFO L225 Difference]: With dead ends: 3841 [2020-12-22 10:20:08,503 INFO L226 Difference]: Without dead ends: 3319 [2020-12-22 10:20:08,507 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:20:08,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3319 states. [2020-12-22 10:20:08,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3319 to 3317. [2020-12-22 10:20:08,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3317 states. [2020-12-22 10:20:08,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3317 states to 3317 states and 5201 transitions. [2020-12-22 10:20:08,614 INFO L78 Accepts]: Start accepts. Automaton has 3317 states and 5201 transitions. Word has length 106 [2020-12-22 10:20:08,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:20:08,614 INFO L481 AbstractCegarLoop]: Abstraction has 3317 states and 5201 transitions. [2020-12-22 10:20:08,614 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:20:08,615 INFO L276 IsEmpty]: Start isEmpty. Operand 3317 states and 5201 transitions. [2020-12-22 10:20:08,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-12-22 10:20:08,616 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:20:08,616 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 10:20:08,616 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 10:20:08,617 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:20:08,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:20:08,617 INFO L82 PathProgramCache]: Analyzing trace with hash 2050284924, now seen corresponding path program 1 times [2020-12-22 10:20:08,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:20:08,618 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254618298] [2020-12-22 10:20:08,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:20:08,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:20:08,834 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 10:20:08,835 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254618298] [2020-12-22 10:20:08,835 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:20:08,835 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-12-22 10:20:08,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565672440] [2020-12-22 10:20:08,836 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 10:20:08,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:20:08,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 10:20:08,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-12-22 10:20:08,837 INFO L87 Difference]: Start difference. First operand 3317 states and 5201 transitions. Second operand 10 states. [2020-12-22 10:20:10,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:20:10,038 INFO L93 Difference]: Finished difference Result 19221 states and 30305 transitions. [2020-12-22 10:20:10,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-22 10:20:10,039 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 106 [2020-12-22 10:20:10,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:20:10,123 INFO L225 Difference]: With dead ends: 19221 [2020-12-22 10:20:10,123 INFO L226 Difference]: Without dead ends: 18227 [2020-12-22 10:20:10,134 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=162, Invalid=344, Unknown=0, NotChecked=0, Total=506 [2020-12-22 10:20:10,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18227 states. [2020-12-22 10:20:10,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18227 to 4309. [2020-12-22 10:20:10,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4309 states. [2020-12-22 10:20:10,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4309 states to 4309 states and 6737 transitions. [2020-12-22 10:20:10,531 INFO L78 Accepts]: Start accepts. Automaton has 4309 states and 6737 transitions. Word has length 106 [2020-12-22 10:20:10,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:20:10,531 INFO L481 AbstractCegarLoop]: Abstraction has 4309 states and 6737 transitions. [2020-12-22 10:20:10,532 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 10:20:10,532 INFO L276 IsEmpty]: Start isEmpty. Operand 4309 states and 6737 transitions. [2020-12-22 10:20:10,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-12-22 10:20:10,533 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:20:10,533 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 10:20:10,534 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 10:20:10,534 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:20:10,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:20:10,534 INFO L82 PathProgramCache]: Analyzing trace with hash 1813103660, now seen corresponding path program 1 times [2020-12-22 10:20:10,535 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:20:10,540 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91626415] [2020-12-22 10:20:10,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:20:10,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:20:10,660 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 10:20:10,661 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91626415] [2020-12-22 10:20:10,662 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:20:10,662 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:20:10,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932287650] [2020-12-22 10:20:10,663 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:20:10,663 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:20:10,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:20:10,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:20:10,664 INFO L87 Difference]: Start difference. First operand 4309 states and 6737 transitions. Second operand 3 states. [2020-12-22 10:20:10,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:20:10,871 INFO L93 Difference]: Finished difference Result 7251 states and 11333 transitions. [2020-12-22 10:20:10,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:20:10,871 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 108 [2020-12-22 10:20:10,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:20:10,886 INFO L225 Difference]: With dead ends: 7251 [2020-12-22 10:20:10,887 INFO L226 Difference]: Without dead ends: 5265 [2020-12-22 10:20:10,892 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 10:20:10,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5265 states. [2020-12-22 10:20:11,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5265 to 5263. [2020-12-22 10:20:11,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5263 states. [2020-12-22 10:20:11,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5263 states to 5263 states and 8203 transitions. [2020-12-22 10:20:11,228 INFO L78 Accepts]: Start accepts. Automaton has 5263 states and 8203 transitions. Word has length 108 [2020-12-22 10:20:11,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:20:11,228 INFO L481 AbstractCegarLoop]: Abstraction has 5263 states and 8203 transitions. [2020-12-22 10:20:11,228 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:20:11,229 INFO L276 IsEmpty]: Start isEmpty. Operand 5263 states and 8203 transitions. [2020-12-22 10:20:11,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-12-22 10:20:11,230 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:20:11,230 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 10:20:11,231 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 10:20:11,231 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:20:11,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:20:11,232 INFO L82 PathProgramCache]: Analyzing trace with hash 1879597172, now seen corresponding path program 1 times [2020-12-22 10:20:11,232 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:20:11,232 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796340795] [2020-12-22 10:20:11,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:20:11,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:20:11,762 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 10:20:11,762 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796340795] [2020-12-22 10:20:11,762 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:20:11,763 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-12-22 10:20:11,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565799754] [2020-12-22 10:20:11,764 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 10:20:11,764 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:20:11,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 10:20:11,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-12-22 10:20:11,765 INFO L87 Difference]: Start difference. First operand 5263 states and 8203 transitions. Second operand 10 states. [2020-12-22 10:20:12,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:20:12,639 INFO L93 Difference]: Finished difference Result 8203 states and 12773 transitions. [2020-12-22 10:20:12,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 10:20:12,639 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 108 [2020-12-22 10:20:12,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:20:12,654 INFO L225 Difference]: With dead ends: 8203 [2020-12-22 10:20:12,654 INFO L226 Difference]: Without dead ends: 5265 [2020-12-22 10:20:12,662 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2020-12-22 10:20:12,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5265 states. [2020-12-22 10:20:12,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5265 to 5263. [2020-12-22 10:20:12,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5263 states. [2020-12-22 10:20:12,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5263 states to 5263 states and 8179 transitions. [2020-12-22 10:20:12,908 INFO L78 Accepts]: Start accepts. Automaton has 5263 states and 8179 transitions. Word has length 108 [2020-12-22 10:20:12,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:20:12,909 INFO L481 AbstractCegarLoop]: Abstraction has 5263 states and 8179 transitions. [2020-12-22 10:20:12,909 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 10:20:12,909 INFO L276 IsEmpty]: Start isEmpty. Operand 5263 states and 8179 transitions. [2020-12-22 10:20:12,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-12-22 10:20:12,910 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:20:12,911 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 10:20:12,911 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 10:20:12,911 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:20:12,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:20:12,912 INFO L82 PathProgramCache]: Analyzing trace with hash 621051568, now seen corresponding path program 1 times [2020-12-22 10:20:12,912 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:20:12,912 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858051652] [2020-12-22 10:20:12,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:20:12,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:20:12,996 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 10:20:12,997 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858051652] [2020-12-22 10:20:12,997 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:20:12,997 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:20:12,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962568832] [2020-12-22 10:20:12,998 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:20:12,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:20:12,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:20:12,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:20:12,999 INFO L87 Difference]: Start difference. First operand 5263 states and 8179 transitions. Second operand 3 states. [2020-12-22 10:20:13,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:20:13,343 INFO L93 Difference]: Finished difference Result 10851 states and 16789 transitions. [2020-12-22 10:20:13,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:20:13,344 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 108 [2020-12-22 10:20:13,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:20:13,363 INFO L225 Difference]: With dead ends: 10851 [2020-12-22 10:20:13,364 INFO L226 Difference]: Without dead ends: 7913 [2020-12-22 10:20:13,370 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 10:20:13,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7913 states. [2020-12-22 10:20:13,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7913 to 7911. [2020-12-22 10:20:13,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7911 states. [2020-12-22 10:20:13,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7911 states to 7911 states and 12195 transitions. [2020-12-22 10:20:13,905 INFO L78 Accepts]: Start accepts. Automaton has 7911 states and 12195 transitions. Word has length 108 [2020-12-22 10:20:13,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:20:13,906 INFO L481 AbstractCegarLoop]: Abstraction has 7911 states and 12195 transitions. [2020-12-22 10:20:13,906 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:20:13,906 INFO L276 IsEmpty]: Start isEmpty. Operand 7911 states and 12195 transitions. [2020-12-22 10:20:13,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-12-22 10:20:13,907 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:20:13,908 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 10:20:13,908 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 10:20:13,908 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:20:13,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:20:13,909 INFO L82 PathProgramCache]: Analyzing trace with hash 894739280, now seen corresponding path program 1 times [2020-12-22 10:20:13,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:20:13,909 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801472450] [2020-12-22 10:20:13,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:20:13,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:20:13,999 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 10:20:14,000 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801472450] [2020-12-22 10:20:14,000 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:20:14,000 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:20:14,001 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160923953] [2020-12-22 10:20:14,001 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:20:14,001 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:20:14,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:20:14,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:20:14,002 INFO L87 Difference]: Start difference. First operand 7911 states and 12195 transitions. Second operand 3 states. [2020-12-22 10:20:14,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:20:14,637 INFO L93 Difference]: Finished difference Result 18507 states and 28357 transitions. [2020-12-22 10:20:14,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:20:14,638 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 108 [2020-12-22 10:20:14,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:20:14,668 INFO L225 Difference]: With dead ends: 18507 [2020-12-22 10:20:14,669 INFO L226 Difference]: Without dead ends: 12921 [2020-12-22 10:20:14,681 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 10:20:14,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12921 states. [2020-12-22 10:20:15,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12921 to 12919. [2020-12-22 10:20:15,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12919 states. [2020-12-22 10:20:15,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12919 states to 12919 states and 19699 transitions. [2020-12-22 10:20:15,422 INFO L78 Accepts]: Start accepts. Automaton has 12919 states and 19699 transitions. Word has length 108 [2020-12-22 10:20:15,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:20:15,423 INFO L481 AbstractCegarLoop]: Abstraction has 12919 states and 19699 transitions. [2020-12-22 10:20:15,423 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:20:15,423 INFO L276 IsEmpty]: Start isEmpty. Operand 12919 states and 19699 transitions. [2020-12-22 10:20:15,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-12-22 10:20:15,424 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:20:15,424 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 10:20:15,425 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 10:20:15,425 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:20:15,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:20:15,425 INFO L82 PathProgramCache]: Analyzing trace with hash -1581156368, now seen corresponding path program 1 times [2020-12-22 10:20:15,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:20:15,426 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512664829] [2020-12-22 10:20:15,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:20:15,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:20:15,510 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 10:20:15,511 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512664829] [2020-12-22 10:20:15,511 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:20:15,511 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:20:15,511 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538922511] [2020-12-22 10:20:15,512 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:20:15,512 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:20:15,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:20:15,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:20:15,513 INFO L87 Difference]: Start difference. First operand 12919 states and 19699 transitions. Second operand 3 states. [2020-12-22 10:20:16,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:20:16,503 INFO L93 Difference]: Finished difference Result 32955 states and 49909 transitions. [2020-12-22 10:20:16,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:20:16,504 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 108 [2020-12-22 10:20:16,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:20:16,549 INFO L225 Difference]: With dead ends: 32955 [2020-12-22 10:20:16,549 INFO L226 Difference]: Without dead ends: 22361 [2020-12-22 10:20:16,564 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 10:20:16,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22361 states. [2020-12-22 10:20:17,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22361 to 22359. [2020-12-22 10:20:17,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22359 states. [2020-12-22 10:20:18,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22359 states to 22359 states and 33651 transitions. [2020-12-22 10:20:18,024 INFO L78 Accepts]: Start accepts. Automaton has 22359 states and 33651 transitions. Word has length 108 [2020-12-22 10:20:18,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:20:18,025 INFO L481 AbstractCegarLoop]: Abstraction has 22359 states and 33651 transitions. [2020-12-22 10:20:18,025 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:20:18,025 INFO L276 IsEmpty]: Start isEmpty. Operand 22359 states and 33651 transitions. [2020-12-22 10:20:18,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-12-22 10:20:18,027 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:20:18,027 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 10:20:18,028 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 10:20:18,028 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:20:18,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:20:18,029 INFO L82 PathProgramCache]: Analyzing trace with hash -1401750384, now seen corresponding path program 1 times [2020-12-22 10:20:18,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:20:18,029 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904387387] [2020-12-22 10:20:18,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:20:18,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:20:18,124 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 10:20:18,125 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904387387] [2020-12-22 10:20:18,125 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:20:18,125 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:20:18,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194100409] [2020-12-22 10:20:18,126 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:20:18,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:20:18,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:20:18,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:20:18,127 INFO L87 Difference]: Start difference. First operand 22359 states and 33651 transitions. Second operand 3 states. [2020-12-22 10:20:20,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:20:20,246 INFO L93 Difference]: Finished difference Result 60123 states and 89845 transitions. [2020-12-22 10:20:20,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:20:20,246 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 108 [2020-12-22 10:20:20,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:20:20,313 INFO L225 Difference]: With dead ends: 60123 [2020-12-22 10:20:20,314 INFO L226 Difference]: Without dead ends: 40089 [2020-12-22 10:20:20,344 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 10:20:20,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40089 states. [2020-12-22 10:20:22,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40089 to 40087. [2020-12-22 10:20:22,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40087 states. [2020-12-22 10:20:22,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40087 states to 40087 states and 59443 transitions. [2020-12-22 10:20:22,786 INFO L78 Accepts]: Start accepts. Automaton has 40087 states and 59443 transitions. Word has length 108 [2020-12-22 10:20:22,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:20:22,786 INFO L481 AbstractCegarLoop]: Abstraction has 40087 states and 59443 transitions. [2020-12-22 10:20:22,786 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:20:22,786 INFO L276 IsEmpty]: Start isEmpty. Operand 40087 states and 59443 transitions. [2020-12-22 10:20:22,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-12-22 10:20:22,788 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:20:22,788 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 10:20:22,788 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 10:20:22,788 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:20:22,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:20:22,789 INFO L82 PathProgramCache]: Analyzing trace with hash 2018214719, now seen corresponding path program 1 times [2020-12-22 10:20:22,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:20:22,789 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327667814] [2020-12-22 10:20:22,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:20:22,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:20:22,929 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 10:20:22,930 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327667814] [2020-12-22 10:20:22,930 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:20:22,930 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 10:20:22,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549340811] [2020-12-22 10:20:22,931 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 10:20:22,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:20:22,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 10:20:22,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-12-22 10:20:22,932 INFO L87 Difference]: Start difference. First operand 40087 states and 59443 transitions. Second operand 8 states. [2020-12-22 10:20:28,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:20:28,164 INFO L93 Difference]: Finished difference Result 72254 states and 106020 transitions. [2020-12-22 10:20:28,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 10:20:28,164 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 109 [2020-12-22 10:20:28,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:20:28,267 INFO L225 Difference]: With dead ends: 72254 [2020-12-22 10:20:28,268 INFO L226 Difference]: Without dead ends: 72252 [2020-12-22 10:20:28,285 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2020-12-22 10:20:28,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72252 states. [2020-12-22 10:20:31,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72252 to 41623. [2020-12-22 10:20:31,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41623 states. [2020-12-22 10:20:31,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41623 states to 41623 states and 60851 transitions. [2020-12-22 10:20:31,482 INFO L78 Accepts]: Start accepts. Automaton has 41623 states and 60851 transitions. Word has length 109 [2020-12-22 10:20:31,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:20:31,482 INFO L481 AbstractCegarLoop]: Abstraction has 41623 states and 60851 transitions. [2020-12-22 10:20:31,482 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 10:20:31,482 INFO L276 IsEmpty]: Start isEmpty. Operand 41623 states and 60851 transitions. [2020-12-22 10:20:31,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-12-22 10:20:31,485 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:20:31,486 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:20:31,486 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 10:20:31,486 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:20:31,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:20:31,487 INFO L82 PathProgramCache]: Analyzing trace with hash 6638733, now seen corresponding path program 1 times [2020-12-22 10:20:31,487 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:20:31,487 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944165295] [2020-12-22 10:20:31,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:20:31,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:20:31,647 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:20:31,647 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944165295] [2020-12-22 10:20:31,650 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:20:31,650 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:20:31,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930815647] [2020-12-22 10:20:31,651 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 10:20:31,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:20:31,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 10:20:31,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 10:20:31,652 INFO L87 Difference]: Start difference. First operand 41623 states and 60851 transitions. Second operand 4 states. [2020-12-22 10:20:42,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:20:42,161 INFO L93 Difference]: Finished difference Result 44666 states and 66499 transitions. [2020-12-22 10:20:42,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 10:20:42,161 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 131 [2020-12-22 10:20:42,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:20:42,197 INFO L225 Difference]: With dead ends: 44666 [2020-12-22 10:20:42,197 INFO L226 Difference]: Without dead ends: 43125 [2020-12-22 10:20:42,206 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 10:20:42,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43125 states. [2020-12-22 10:20:44,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43125 to 43125. [2020-12-22 10:20:44,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43125 states. [2020-12-22 10:20:44,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43125 states to 43125 states and 62429 transitions. [2020-12-22 10:20:44,724 INFO L78 Accepts]: Start accepts. Automaton has 43125 states and 62429 transitions. Word has length 131 [2020-12-22 10:20:44,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:20:44,724 INFO L481 AbstractCegarLoop]: Abstraction has 43125 states and 62429 transitions. [2020-12-22 10:20:44,724 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 10:20:44,724 INFO L276 IsEmpty]: Start isEmpty. Operand 43125 states and 62429 transitions. [2020-12-22 10:20:44,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2020-12-22 10:20:44,748 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:20:44,749 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-12-22 10:20:44,749 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 10:20:44,749 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:20:44,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:20:44,750 INFO L82 PathProgramCache]: Analyzing trace with hash 1243757929, now seen corresponding path program 1 times [2020-12-22 10:20:44,750 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:20:44,750 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361142406] [2020-12-22 10:20:44,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:20:44,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:20:44,959 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-12-22 10:20:44,960 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361142406] [2020-12-22 10:20:44,960 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:20:44,960 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-12-22 10:20:44,960 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623969208] [2020-12-22 10:20:44,961 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 10:20:44,961 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:20:44,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 10:20:44,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-12-22 10:20:44,962 INFO L87 Difference]: Start difference. First operand 43125 states and 62429 transitions. Second operand 10 states. [2020-12-22 10:21:03,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:21:03,985 INFO L93 Difference]: Finished difference Result 365063 states and 530726 transitions. [2020-12-22 10:21:03,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 10:21:03,986 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 149 [2020-12-22 10:21:03,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:21:04,507 INFO L225 Difference]: With dead ends: 365063 [2020-12-22 10:21:04,508 INFO L226 Difference]: Without dead ends: 325765 [2020-12-22 10:21:04,656 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:21:04,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325765 states. [2020-12-22 10:21:12,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325765 to 82421. [2020-12-22 10:21:12,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82421 states. [2020-12-22 10:21:12,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82421 states to 82421 states and 119261 transitions. [2020-12-22 10:21:12,351 INFO L78 Accepts]: Start accepts. Automaton has 82421 states and 119261 transitions. Word has length 149 [2020-12-22 10:21:12,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:21:12,352 INFO L481 AbstractCegarLoop]: Abstraction has 82421 states and 119261 transitions. [2020-12-22 10:21:12,352 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 10:21:12,352 INFO L276 IsEmpty]: Start isEmpty. Operand 82421 states and 119261 transitions. [2020-12-22 10:21:12,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2020-12-22 10:21:12,388 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:21:12,388 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:21:12,389 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 10:21:12,389 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:21:12,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:21:12,390 INFO L82 PathProgramCache]: Analyzing trace with hash 1273280147, now seen corresponding path program 1 times [2020-12-22 10:21:12,390 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:21:12,390 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917929933] [2020-12-22 10:21:12,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:21:12,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:21:12,592 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-12-22 10:21:12,593 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917929933] [2020-12-22 10:21:12,593 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:21:12,593 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-12-22 10:21:12,593 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23170045] [2020-12-22 10:21:12,594 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 10:21:12,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:21:12,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 10:21:12,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-12-22 10:21:12,595 INFO L87 Difference]: Start difference. First operand 82421 states and 119261 transitions. Second operand 10 states. [2020-12-22 10:21:35,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:21:35,766 INFO L93 Difference]: Finished difference Result 404359 states and 587558 transitions. [2020-12-22 10:21:35,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 10:21:35,767 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 149 [2020-12-22 10:21:35,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:21:36,530 INFO L225 Difference]: With dead ends: 404359 [2020-12-22 10:21:36,530 INFO L226 Difference]: Without dead ends: 365061 [2020-12-22 10:21:36,658 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:21:36,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365061 states. [2020-12-22 10:21:48,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365061 to 141429. [2020-12-22 10:21:48,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141429 states. [2020-12-22 10:21:49,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141429 states to 141429 states and 204189 transitions. [2020-12-22 10:21:49,259 INFO L78 Accepts]: Start accepts. Automaton has 141429 states and 204189 transitions. Word has length 149 [2020-12-22 10:21:49,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:21:49,259 INFO L481 AbstractCegarLoop]: Abstraction has 141429 states and 204189 transitions. [2020-12-22 10:21:49,260 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 10:21:49,260 INFO L276 IsEmpty]: Start isEmpty. Operand 141429 states and 204189 transitions. [2020-12-22 10:21:49,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2020-12-22 10:21:49,298 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:21:49,298 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:21:49,299 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 10:21:49,299 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:21:49,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:21:49,299 INFO L82 PathProgramCache]: Analyzing trace with hash 1546967859, now seen corresponding path program 1 times [2020-12-22 10:21:49,300 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:21:49,300 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933120169] [2020-12-22 10:21:49,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:21:49,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:21:49,814 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-12-22 10:21:49,815 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933120169] [2020-12-22 10:21:49,815 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:21:49,815 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-12-22 10:21:49,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867317079] [2020-12-22 10:21:49,816 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 10:21:49,816 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:21:49,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 10:21:49,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-12-22 10:21:49,817 INFO L87 Difference]: Start difference. First operand 141429 states and 204189 transitions. Second operand 10 states. [2020-12-22 10:22:17,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:22:17,605 INFO L93 Difference]: Finished difference Result 443655 states and 644390 transitions. [2020-12-22 10:22:17,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 10:22:17,606 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 149 [2020-12-22 10:22:17,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:22:18,239 INFO L225 Difference]: With dead ends: 443655 [2020-12-22 10:22:18,240 INFO L226 Difference]: Without dead ends: 404357 [2020-12-22 10:22:18,332 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:22:18,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404357 states. [2020-12-22 10:22:34,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404357 to 180725. [2020-12-22 10:22:34,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180725 states. [2020-12-22 10:22:34,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180725 states to 180725 states and 261021 transitions. [2020-12-22 10:22:34,809 INFO L78 Accepts]: Start accepts. Automaton has 180725 states and 261021 transitions. Word has length 149 [2020-12-22 10:22:34,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:22:34,810 INFO L481 AbstractCegarLoop]: Abstraction has 180725 states and 261021 transitions. [2020-12-22 10:22:34,810 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 10:22:34,810 INFO L276 IsEmpty]: Start isEmpty. Operand 180725 states and 261021 transitions. [2020-12-22 10:22:34,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2020-12-22 10:22:34,842 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:22:34,842 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:22:34,842 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 10:22:34,843 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:22:34,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:22:34,844 INFO L82 PathProgramCache]: Analyzing trace with hash -928927789, now seen corresponding path program 1 times [2020-12-22 10:22:34,844 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:22:34,844 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223984395] [2020-12-22 10:22:34,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:22:34,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:22:35,094 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-12-22 10:22:35,096 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223984395] [2020-12-22 10:22:35,097 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:22:35,097 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-12-22 10:22:35,097 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266260056] [2020-12-22 10:22:35,098 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 10:22:35,098 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:22:35,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 10:22:35,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-12-22 10:22:35,099 INFO L87 Difference]: Start difference. First operand 180725 states and 261021 transitions. Second operand 10 states.