/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/product-lines/elevator_spec9_product09.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 06:13:01,219 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 06:13:01,222 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 06:13:01,275 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 06:13:01,276 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 06:13:01,280 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 06:13:01,284 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 06:13:01,303 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 06:13:01,307 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 06:13:01,313 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 06:13:01,314 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 06:13:01,315 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 06:13:01,316 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 06:13:01,319 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 06:13:01,321 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 06:13:01,322 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 06:13:01,323 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 06:13:01,326 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 06:13:01,334 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 06:13:01,342 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 06:13:01,344 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 06:13:01,345 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 06:13:01,347 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 06:13:01,349 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 06:13:01,356 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 06:13:01,362 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 06:13:01,363 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 06:13:01,365 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 06:13:01,366 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 06:13:01,367 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 06:13:01,367 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 06:13:01,368 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 06:13:01,368 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 06:13:01,369 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 06:13:01,370 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 06:13:01,370 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 06:13:01,371 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 06:13:01,432 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 06:13:01,432 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 06:13:01,434 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 06:13:01,434 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 06:13:01,434 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 06:13:01,435 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 06:13:01,435 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 06:13:01,435 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 06:13:01,436 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 06:13:01,436 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 06:13:01,436 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 06:13:01,436 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 06:13:01,437 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 06:13:01,437 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 06:13:01,437 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 06:13:01,437 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 06:13:01,438 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 06:13:01,438 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 06:13:01,438 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 06:13:01,438 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 06:13:01,439 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 06:13:01,439 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 06:13:01,439 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 06:13:01,439 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 06:13:01,440 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 06:13:01,440 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 06:13:01,796 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 06:13:01,824 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 06:13:01,827 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 06:13:01,828 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 06:13:01,829 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 06:13:01,830 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/product-lines/elevator_spec9_product09.cil.c [2020-12-22 06:13:01,901 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/de5cf2300/6e65318e0b4a4ef7b5755336b98850cc/FLAG81e960aed [2020-12-22 06:13:02,698 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 06:13:02,700 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/product-lines/elevator_spec9_product09.cil.c [2020-12-22 06:13:02,732 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/de5cf2300/6e65318e0b4a4ef7b5755336b98850cc/FLAG81e960aed [2020-12-22 06:13:02,851 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/de5cf2300/6e65318e0b4a4ef7b5755336b98850cc [2020-12-22 06:13:02,855 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 06:13:02,857 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 06:13:02,858 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 06:13:02,859 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 06:13:02,862 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 06:13:02,863 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 06:13:02" (1/1) ... [2020-12-22 06:13:02,865 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@9716742 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:13:02, skipping insertion in model container [2020-12-22 06:13:02,865 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 06:13:02" (1/1) ... [2020-12-22 06:13:02,874 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 06:13:02,942 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 06:13:03,574 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/product-lines/elevator_spec9_product09.cil.c[70025,70038] [2020-12-22 06:13:03,578 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 06:13:03,590 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 06:13:03,771 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/product-lines/elevator_spec9_product09.cil.c[70025,70038] [2020-12-22 06:13:03,771 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 06:13:03,864 INFO L208 MainTranslator]: Completed translation [2020-12-22 06:13:03,865 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:13:03 WrapperNode [2020-12-22 06:13:03,865 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 06:13:03,867 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 06:13:03,868 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 06:13:03,868 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 06:13:03,877 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:13:03" (1/1) ... [2020-12-22 06:13:03,943 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:13:03" (1/1) ... [2020-12-22 06:13:04,136 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 06:13:04,137 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 06:13:04,137 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 06:13:04,137 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 06:13:04,148 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:13:03" (1/1) ... [2020-12-22 06:13:04,149 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:13:03" (1/1) ... [2020-12-22 06:13:04,165 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:13:03" (1/1) ... [2020-12-22 06:13:04,166 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:13:03" (1/1) ... [2020-12-22 06:13:04,238 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:13:03" (1/1) ... [2020-12-22 06:13:04,302 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:13:03" (1/1) ... [2020-12-22 06:13:04,318 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:13:03" (1/1) ... [2020-12-22 06:13:04,340 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 06:13:04,342 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 06:13:04,342 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 06:13:04,342 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 06:13:04,343 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:13:03" (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 06:13:04,447 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 06:13:04,448 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 06:13:04,448 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 06:13:04,448 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 06:13:10,342 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 06:13:10,342 INFO L299 CfgBuilder]: Removed 493 assume(true) statements. [2020-12-22 06:13:10,347 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 06:13:10 BoogieIcfgContainer [2020-12-22 06:13:10,347 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 06:13:10,349 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 06:13:10,349 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 06:13:10,353 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 06:13:10,353 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 06:13:02" (1/3) ... [2020-12-22 06:13:10,354 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@431025f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 06:13:10, skipping insertion in model container [2020-12-22 06:13:10,355 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:13:03" (2/3) ... [2020-12-22 06:13:10,355 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@431025f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 06:13:10, skipping insertion in model container [2020-12-22 06:13:10,355 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 06:13:10" (3/3) ... [2020-12-22 06:13:10,361 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec9_product09.cil.c [2020-12-22 06:13:10,368 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 06:13:10,375 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 5 error locations. [2020-12-22 06:13:10,430 INFO L253 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2020-12-22 06:13:10,471 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 06:13:10,471 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 06:13:10,472 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 06:13:10,472 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 06:13:10,472 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 06:13:10,472 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 06:13:10,472 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 06:13:10,473 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 06:13:10,527 INFO L276 IsEmpty]: Start isEmpty. Operand 2320 states. [2020-12-22 06:13:10,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-12-22 06:13:10,547 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:13:10,548 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] [2020-12-22 06:13:10,548 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:13:10,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:13:10,555 INFO L82 PathProgramCache]: Analyzing trace with hash 1344261416, now seen corresponding path program 1 times [2020-12-22 06:13:10,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:13:10,565 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104815355] [2020-12-22 06:13:10,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:13:10,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:13:11,053 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 06:13:11,054 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104815355] [2020-12-22 06:13:11,055 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:13:11,055 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 06:13:11,056 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770616315] [2020-12-22 06:13:11,061 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 06:13:11,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:13:11,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 06:13:11,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:13:11,087 INFO L87 Difference]: Start difference. First operand 2320 states. Second operand 3 states. [2020-12-22 06:13:11,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:13:11,348 INFO L93 Difference]: Finished difference Result 4631 states and 8797 transitions. [2020-12-22 06:13:11,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 06:13:11,351 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 37 [2020-12-22 06:13:11,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:13:11,411 INFO L225 Difference]: With dead ends: 4631 [2020-12-22 06:13:11,411 INFO L226 Difference]: Without dead ends: 2316 [2020-12-22 06:13:11,425 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 06:13:11,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2316 states. [2020-12-22 06:13:11,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2316 to 2316. [2020-12-22 06:13:11,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2316 states. [2020-12-22 06:13:11,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2316 states to 2316 states and 4389 transitions. [2020-12-22 06:13:11,597 INFO L78 Accepts]: Start accepts. Automaton has 2316 states and 4389 transitions. Word has length 37 [2020-12-22 06:13:11,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:13:11,597 INFO L481 AbstractCegarLoop]: Abstraction has 2316 states and 4389 transitions. [2020-12-22 06:13:11,597 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 06:13:11,597 INFO L276 IsEmpty]: Start isEmpty. Operand 2316 states and 4389 transitions. [2020-12-22 06:13:11,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-12-22 06:13:11,603 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:13:11,603 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] [2020-12-22 06:13:11,604 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 06:13:11,604 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:13:11,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:13:11,605 INFO L82 PathProgramCache]: Analyzing trace with hash 1891407277, now seen corresponding path program 1 times [2020-12-22 06:13:11,606 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:13:11,606 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616714622] [2020-12-22 06:13:11,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:13:11,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:13:11,814 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 06:13:11,814 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616714622] [2020-12-22 06:13:11,814 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:13:11,815 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 06:13:11,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053803772] [2020-12-22 06:13:11,816 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 06:13:11,817 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:13:11,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 06:13:11,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-12-22 06:13:11,818 INFO L87 Difference]: Start difference. First operand 2316 states and 4389 transitions. Second operand 6 states. [2020-12-22 06:13:12,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:13:12,076 INFO L93 Difference]: Finished difference Result 4583 states and 8694 transitions. [2020-12-22 06:13:12,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 06:13:12,077 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 44 [2020-12-22 06:13:12,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:13:12,093 INFO L225 Difference]: With dead ends: 4583 [2020-12-22 06:13:12,093 INFO L226 Difference]: Without dead ends: 2310 [2020-12-22 06:13:12,099 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-12-22 06:13:12,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2310 states. [2020-12-22 06:13:12,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2310 to 2310. [2020-12-22 06:13:12,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2310 states. [2020-12-22 06:13:12,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2310 states to 2310 states and 4376 transitions. [2020-12-22 06:13:12,199 INFO L78 Accepts]: Start accepts. Automaton has 2310 states and 4376 transitions. Word has length 44 [2020-12-22 06:13:12,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:13:12,200 INFO L481 AbstractCegarLoop]: Abstraction has 2310 states and 4376 transitions. [2020-12-22 06:13:12,200 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 06:13:12,200 INFO L276 IsEmpty]: Start isEmpty. Operand 2310 states and 4376 transitions. [2020-12-22 06:13:12,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-12-22 06:13:12,206 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:13:12,206 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] [2020-12-22 06:13:12,206 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 06:13:12,209 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:13:12,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:13:12,210 INFO L82 PathProgramCache]: Analyzing trace with hash -291718581, now seen corresponding path program 1 times [2020-12-22 06:13:12,210 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:13:12,211 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904928244] [2020-12-22 06:13:12,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:13:12,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:13:12,344 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 06:13:12,345 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904928244] [2020-12-22 06:13:12,345 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:13:12,346 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 06:13:12,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088926986] [2020-12-22 06:13:12,347 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 06:13:12,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:13:12,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 06:13:12,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 06:13:12,348 INFO L87 Difference]: Start difference. First operand 2310 states and 4376 transitions. Second operand 4 states. [2020-12-22 06:13:12,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:13:12,574 INFO L93 Difference]: Finished difference Result 4577 states and 8681 transitions. [2020-12-22 06:13:12,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 06:13:12,577 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 45 [2020-12-22 06:13:12,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:13:12,591 INFO L225 Difference]: With dead ends: 4577 [2020-12-22 06:13:12,591 INFO L226 Difference]: Without dead ends: 2310 [2020-12-22 06:13:12,599 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 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 06:13:12,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2310 states. [2020-12-22 06:13:12,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2310 to 2310. [2020-12-22 06:13:12,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2310 states. [2020-12-22 06:13:12,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2310 states to 2310 states and 4372 transitions. [2020-12-22 06:13:12,692 INFO L78 Accepts]: Start accepts. Automaton has 2310 states and 4372 transitions. Word has length 45 [2020-12-22 06:13:12,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:13:12,699 INFO L481 AbstractCegarLoop]: Abstraction has 2310 states and 4372 transitions. [2020-12-22 06:13:12,700 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 06:13:12,701 INFO L276 IsEmpty]: Start isEmpty. Operand 2310 states and 4372 transitions. [2020-12-22 06:13:12,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-12-22 06:13:12,704 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:13:12,704 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 06:13:12,704 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 06:13:12,704 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:13:12,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:13:12,705 INFO L82 PathProgramCache]: Analyzing trace with hash 879101776, now seen corresponding path program 1 times [2020-12-22 06:13:12,706 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:13:12,707 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505227910] [2020-12-22 06:13:12,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:13:12,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:13:12,862 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 06:13:12,862 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505227910] [2020-12-22 06:13:12,863 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:13:12,864 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 06:13:12,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720799075] [2020-12-22 06:13:12,864 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 06:13:12,864 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:13:12,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 06:13:12,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 06:13:12,866 INFO L87 Difference]: Start difference. First operand 2310 states and 4372 transitions. Second operand 4 states. [2020-12-22 06:13:13,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:13:13,061 INFO L93 Difference]: Finished difference Result 4577 states and 8677 transitions. [2020-12-22 06:13:13,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 06:13:13,062 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 46 [2020-12-22 06:13:13,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:13:13,077 INFO L225 Difference]: With dead ends: 4577 [2020-12-22 06:13:13,078 INFO L226 Difference]: Without dead ends: 2310 [2020-12-22 06:13:13,083 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 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 06:13:13,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2310 states. [2020-12-22 06:13:13,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2310 to 2310. [2020-12-22 06:13:13,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2310 states. [2020-12-22 06:13:13,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2310 states to 2310 states and 4368 transitions. [2020-12-22 06:13:13,194 INFO L78 Accepts]: Start accepts. Automaton has 2310 states and 4368 transitions. Word has length 46 [2020-12-22 06:13:13,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:13:13,194 INFO L481 AbstractCegarLoop]: Abstraction has 2310 states and 4368 transitions. [2020-12-22 06:13:13,194 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 06:13:13,195 INFO L276 IsEmpty]: Start isEmpty. Operand 2310 states and 4368 transitions. [2020-12-22 06:13:13,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-12-22 06:13:13,198 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:13:13,198 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] [2020-12-22 06:13:13,200 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 06:13:13,202 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:13:13,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:13:13,203 INFO L82 PathProgramCache]: Analyzing trace with hash 1985335664, now seen corresponding path program 1 times [2020-12-22 06:13:13,203 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:13:13,203 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217237017] [2020-12-22 06:13:13,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:13:13,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:13:13,335 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 06:13:13,336 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217237017] [2020-12-22 06:13:13,336 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:13:13,336 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 06:13:13,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36886237] [2020-12-22 06:13:13,337 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 06:13:13,337 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:13:13,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 06:13:13,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 06:13:13,341 INFO L87 Difference]: Start difference. First operand 2310 states and 4368 transitions. Second operand 4 states. [2020-12-22 06:13:13,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:13:13,544 INFO L93 Difference]: Finished difference Result 4577 states and 8673 transitions. [2020-12-22 06:13:13,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 06:13:13,547 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 47 [2020-12-22 06:13:13,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:13:13,561 INFO L225 Difference]: With dead ends: 4577 [2020-12-22 06:13:13,562 INFO L226 Difference]: Without dead ends: 2310 [2020-12-22 06:13:13,566 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 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 06:13:13,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2310 states. [2020-12-22 06:13:13,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2310 to 2310. [2020-12-22 06:13:13,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2310 states. [2020-12-22 06:13:13,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2310 states to 2310 states and 4364 transitions. [2020-12-22 06:13:13,664 INFO L78 Accepts]: Start accepts. Automaton has 2310 states and 4364 transitions. Word has length 47 [2020-12-22 06:13:13,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:13:13,666 INFO L481 AbstractCegarLoop]: Abstraction has 2310 states and 4364 transitions. [2020-12-22 06:13:13,667 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 06:13:13,667 INFO L276 IsEmpty]: Start isEmpty. Operand 2310 states and 4364 transitions. [2020-12-22 06:13:13,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-12-22 06:13:13,670 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:13:13,671 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] [2020-12-22 06:13:13,671 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 06:13:13,671 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:13:13,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:13:13,672 INFO L82 PathProgramCache]: Analyzing trace with hash 650513904, now seen corresponding path program 1 times [2020-12-22 06:13:13,672 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:13:13,672 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635312892] [2020-12-22 06:13:13,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:13:13,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:13:13,804 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 06:13:13,804 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635312892] [2020-12-22 06:13:13,805 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:13:13,805 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 06:13:13,805 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389076449] [2020-12-22 06:13:13,805 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 06:13:13,805 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:13:13,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 06:13:13,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 06:13:13,806 INFO L87 Difference]: Start difference. First operand 2310 states and 4364 transitions. Second operand 4 states. [2020-12-22 06:13:13,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:13:13,947 INFO L93 Difference]: Finished difference Result 4577 states and 8669 transitions. [2020-12-22 06:13:13,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 06:13:13,948 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 47 [2020-12-22 06:13:13,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:13:13,962 INFO L225 Difference]: With dead ends: 4577 [2020-12-22 06:13:13,963 INFO L226 Difference]: Without dead ends: 2289 [2020-12-22 06:13:13,968 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 06:13:13,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2289 states. [2020-12-22 06:13:14,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2289 to 2289. [2020-12-22 06:13:14,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2289 states. [2020-12-22 06:13:14,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2289 states to 2289 states and 4330 transitions. [2020-12-22 06:13:14,071 INFO L78 Accepts]: Start accepts. Automaton has 2289 states and 4330 transitions. Word has length 47 [2020-12-22 06:13:14,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:13:14,072 INFO L481 AbstractCegarLoop]: Abstraction has 2289 states and 4330 transitions. [2020-12-22 06:13:14,072 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 06:13:14,072 INFO L276 IsEmpty]: Start isEmpty. Operand 2289 states and 4330 transitions. [2020-12-22 06:13:14,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-12-22 06:13:14,074 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:13:14,074 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:13:14,074 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 06:13:14,075 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:13:14,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:13:14,080 INFO L82 PathProgramCache]: Analyzing trace with hash 1089389013, now seen corresponding path program 1 times [2020-12-22 06:13:14,080 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:13:14,081 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709602752] [2020-12-22 06:13:14,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:13:14,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:13:14,266 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 06:13:14,267 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709602752] [2020-12-22 06:13:14,268 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:13:14,268 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 06:13:14,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956558137] [2020-12-22 06:13:14,269 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 06:13:14,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:13:14,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 06:13:14,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 06:13:14,270 INFO L87 Difference]: Start difference. First operand 2289 states and 4330 transitions. Second operand 4 states. [2020-12-22 06:13:14,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:13:14,433 INFO L93 Difference]: Finished difference Result 4556 states and 8635 transitions. [2020-12-22 06:13:14,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 06:13:14,434 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 48 [2020-12-22 06:13:14,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:13:14,447 INFO L225 Difference]: With dead ends: 4556 [2020-12-22 06:13:14,448 INFO L226 Difference]: Without dead ends: 2289 [2020-12-22 06:13:14,453 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 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 06:13:14,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2289 states. [2020-12-22 06:13:14,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2289 to 2289. [2020-12-22 06:13:14,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2289 states. [2020-12-22 06:13:14,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2289 states to 2289 states and 4329 transitions. [2020-12-22 06:13:14,552 INFO L78 Accepts]: Start accepts. Automaton has 2289 states and 4329 transitions. Word has length 48 [2020-12-22 06:13:14,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:13:14,553 INFO L481 AbstractCegarLoop]: Abstraction has 2289 states and 4329 transitions. [2020-12-22 06:13:14,553 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 06:13:14,553 INFO L276 IsEmpty]: Start isEmpty. Operand 2289 states and 4329 transitions. [2020-12-22 06:13:14,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-12-22 06:13:14,555 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:13:14,555 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] [2020-12-22 06:13:14,555 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 06:13:14,556 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:13:14,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:13:14,556 INFO L82 PathProgramCache]: Analyzing trace with hash -1744612203, now seen corresponding path program 1 times [2020-12-22 06:13:14,556 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:13:14,557 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343910100] [2020-12-22 06:13:14,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:13:14,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:13:14,626 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 06:13:14,627 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343910100] [2020-12-22 06:13:14,627 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:13:14,627 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 06:13:14,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291556217] [2020-12-22 06:13:14,628 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 06:13:14,628 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:13:14,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 06:13:14,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 06:13:14,629 INFO L87 Difference]: Start difference. First operand 2289 states and 4329 transitions. Second operand 4 states. [2020-12-22 06:13:14,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:13:14,775 INFO L93 Difference]: Finished difference Result 4556 states and 8634 transitions. [2020-12-22 06:13:14,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 06:13:14,776 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 49 [2020-12-22 06:13:14,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:13:14,789 INFO L225 Difference]: With dead ends: 4556 [2020-12-22 06:13:14,789 INFO L226 Difference]: Without dead ends: 2289 [2020-12-22 06:13:14,794 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 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 06:13:14,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2289 states. [2020-12-22 06:13:14,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2289 to 2289. [2020-12-22 06:13:14,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2289 states. [2020-12-22 06:13:14,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2289 states to 2289 states and 4328 transitions. [2020-12-22 06:13:14,897 INFO L78 Accepts]: Start accepts. Automaton has 2289 states and 4328 transitions. Word has length 49 [2020-12-22 06:13:14,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:13:14,899 INFO L481 AbstractCegarLoop]: Abstraction has 2289 states and 4328 transitions. [2020-12-22 06:13:14,899 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 06:13:14,899 INFO L276 IsEmpty]: Start isEmpty. Operand 2289 states and 4328 transitions. [2020-12-22 06:13:14,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-12-22 06:13:14,901 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:13:14,901 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] [2020-12-22 06:13:14,902 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 06:13:14,902 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:13:14,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:13:14,902 INFO L82 PathProgramCache]: Analyzing trace with hash -233795494, now seen corresponding path program 1 times [2020-12-22 06:13:14,903 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:13:14,903 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761049199] [2020-12-22 06:13:14,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:13:14,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:13:15,022 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 06:13:15,023 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761049199] [2020-12-22 06:13:15,023 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:13:15,023 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 06:13:15,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590927821] [2020-12-22 06:13:15,024 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 06:13:15,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:13:15,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 06:13:15,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-12-22 06:13:15,025 INFO L87 Difference]: Start difference. First operand 2289 states and 4328 transitions. Second operand 7 states. [2020-12-22 06:13:15,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:13:15,279 INFO L93 Difference]: Finished difference Result 4550 states and 8622 transitions. [2020-12-22 06:13:15,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 06:13:15,279 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 50 [2020-12-22 06:13:15,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:13:15,293 INFO L225 Difference]: With dead ends: 4550 [2020-12-22 06:13:15,293 INFO L226 Difference]: Without dead ends: 2289 [2020-12-22 06:13:15,297 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2020-12-22 06:13:15,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2289 states. [2020-12-22 06:13:15,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2289 to 2289. [2020-12-22 06:13:15,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2289 states. [2020-12-22 06:13:15,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2289 states to 2289 states and 4327 transitions. [2020-12-22 06:13:15,452 INFO L78 Accepts]: Start accepts. Automaton has 2289 states and 4327 transitions. Word has length 50 [2020-12-22 06:13:15,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:13:15,456 INFO L481 AbstractCegarLoop]: Abstraction has 2289 states and 4327 transitions. [2020-12-22 06:13:15,456 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 06:13:15,457 INFO L276 IsEmpty]: Start isEmpty. Operand 2289 states and 4327 transitions. [2020-12-22 06:13:15,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-12-22 06:13:15,459 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:13:15,459 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:13:15,459 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 06:13:15,459 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:13:15,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:13:15,460 INFO L82 PathProgramCache]: Analyzing trace with hash 970953866, now seen corresponding path program 1 times [2020-12-22 06:13:15,460 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:13:15,460 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538168188] [2020-12-22 06:13:15,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:13:15,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:13:15,533 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 06:13:15,534 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538168188] [2020-12-22 06:13:15,534 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:13:15,534 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 06:13:15,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106548213] [2020-12-22 06:13:15,535 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 06:13:15,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:13:15,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 06:13:15,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 06:13:15,536 INFO L87 Difference]: Start difference. First operand 2289 states and 4327 transitions. Second operand 5 states. [2020-12-22 06:13:17,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:13:17,387 INFO L93 Difference]: Finished difference Result 9203 states and 17387 transitions. [2020-12-22 06:13:17,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 06:13:17,388 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 51 [2020-12-22 06:13:17,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:13:17,418 INFO L225 Difference]: With dead ends: 9203 [2020-12-22 06:13:17,418 INFO L226 Difference]: Without dead ends: 6957 [2020-12-22 06:13:17,424 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-12-22 06:13:17,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6957 states. [2020-12-22 06:13:17,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6957 to 2293. [2020-12-22 06:13:17,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2293 states. [2020-12-22 06:13:17,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2293 states to 2293 states and 4331 transitions. [2020-12-22 06:13:17,615 INFO L78 Accepts]: Start accepts. Automaton has 2293 states and 4331 transitions. Word has length 51 [2020-12-22 06:13:17,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:13:17,615 INFO L481 AbstractCegarLoop]: Abstraction has 2293 states and 4331 transitions. [2020-12-22 06:13:17,615 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 06:13:17,615 INFO L276 IsEmpty]: Start isEmpty. Operand 2293 states and 4331 transitions. [2020-12-22 06:13:17,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-12-22 06:13:17,618 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:13:17,618 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] [2020-12-22 06:13:17,618 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 06:13:17,618 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:13:17,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:13:17,619 INFO L82 PathProgramCache]: Analyzing trace with hash -1787389742, now seen corresponding path program 1 times [2020-12-22 06:13:17,619 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:13:17,619 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459089209] [2020-12-22 06:13:17,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:13:17,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:13:17,683 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 06:13:17,683 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459089209] [2020-12-22 06:13:17,684 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:13:17,684 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 06:13:17,684 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308661519] [2020-12-22 06:13:17,684 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 06:13:17,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:13:17,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 06:13:17,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 06:13:17,686 INFO L87 Difference]: Start difference. First operand 2293 states and 4331 transitions. Second operand 4 states. [2020-12-22 06:13:19,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:13:19,239 INFO L93 Difference]: Finished difference Result 6667 states and 12558 transitions. [2020-12-22 06:13:19,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 06:13:19,239 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 52 [2020-12-22 06:13:19,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:13:19,252 INFO L225 Difference]: With dead ends: 6667 [2020-12-22 06:13:19,252 INFO L226 Difference]: Without dead ends: 4404 [2020-12-22 06:13:19,258 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 06:13:19,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4404 states. [2020-12-22 06:13:19,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4404 to 3140. [2020-12-22 06:13:19,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3140 states. [2020-12-22 06:13:19,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3140 states to 3140 states and 5878 transitions. [2020-12-22 06:13:19,486 INFO L78 Accepts]: Start accepts. Automaton has 3140 states and 5878 transitions. Word has length 52 [2020-12-22 06:13:19,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:13:19,486 INFO L481 AbstractCegarLoop]: Abstraction has 3140 states and 5878 transitions. [2020-12-22 06:13:19,486 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 06:13:19,486 INFO L276 IsEmpty]: Start isEmpty. Operand 3140 states and 5878 transitions. [2020-12-22 06:13:19,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-12-22 06:13:19,488 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:13:19,488 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] [2020-12-22 06:13:19,488 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 06:13:19,488 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:13:19,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:13:19,489 INFO L82 PathProgramCache]: Analyzing trace with hash 1267828138, now seen corresponding path program 1 times [2020-12-22 06:13:19,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:13:19,489 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357777651] [2020-12-22 06:13:19,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:13:19,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:13:19,556 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 06:13:19,557 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357777651] [2020-12-22 06:13:19,557 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:13:19,557 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 06:13:19,558 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904621489] [2020-12-22 06:13:19,558 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 06:13:19,558 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:13:19,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 06:13:19,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 06:13:19,559 INFO L87 Difference]: Start difference. First operand 3140 states and 5878 transitions. Second operand 5 states. [2020-12-22 06:13:20,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:13:20,813 INFO L93 Difference]: Finished difference Result 22644 states and 42598 transitions. [2020-12-22 06:13:20,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 06:13:20,814 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 54 [2020-12-22 06:13:20,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:13:20,872 INFO L225 Difference]: With dead ends: 22644 [2020-12-22 06:13:20,873 INFO L226 Difference]: Without dead ends: 19543 [2020-12-22 06:13:20,886 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-12-22 06:13:20,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19543 states. [2020-12-22 06:13:21,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19543 to 5772. [2020-12-22 06:13:21,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5772 states. [2020-12-22 06:13:21,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5772 states to 5772 states and 10849 transitions. [2020-12-22 06:13:21,376 INFO L78 Accepts]: Start accepts. Automaton has 5772 states and 10849 transitions. Word has length 54 [2020-12-22 06:13:21,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:13:21,377 INFO L481 AbstractCegarLoop]: Abstraction has 5772 states and 10849 transitions. [2020-12-22 06:13:21,377 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 06:13:21,377 INFO L276 IsEmpty]: Start isEmpty. Operand 5772 states and 10849 transitions. [2020-12-22 06:13:21,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-12-22 06:13:21,379 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:13:21,379 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] [2020-12-22 06:13:21,379 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 06:13:21,380 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:13:21,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:13:21,380 INFO L82 PathProgramCache]: Analyzing trace with hash -537610196, now seen corresponding path program 1 times [2020-12-22 06:13:21,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:13:21,381 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170855412] [2020-12-22 06:13:21,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:13:21,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:13:21,450 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 06:13:21,451 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170855412] [2020-12-22 06:13:21,451 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:13:21,451 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 06:13:21,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634962006] [2020-12-22 06:13:21,452 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 06:13:21,452 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:13:21,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 06:13:21,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 06:13:21,453 INFO L87 Difference]: Start difference. First operand 5772 states and 10849 transitions. Second operand 4 states. [2020-12-22 06:13:21,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:13:21,927 INFO L93 Difference]: Finished difference Result 10278 states and 19228 transitions. [2020-12-22 06:13:21,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 06:13:21,927 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 54 [2020-12-22 06:13:21,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:13:21,949 INFO L225 Difference]: With dead ends: 10278 [2020-12-22 06:13:21,950 INFO L226 Difference]: Without dead ends: 7869 [2020-12-22 06:13:21,961 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 06:13:21,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7869 states. [2020-12-22 06:13:22,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7869 to 5782. [2020-12-22 06:13:22,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5782 states. [2020-12-22 06:13:22,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5782 states to 5782 states and 10859 transitions. [2020-12-22 06:13:22,236 INFO L78 Accepts]: Start accepts. Automaton has 5782 states and 10859 transitions. Word has length 54 [2020-12-22 06:13:22,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:13:22,238 INFO L481 AbstractCegarLoop]: Abstraction has 5782 states and 10859 transitions. [2020-12-22 06:13:22,238 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 06:13:22,238 INFO L276 IsEmpty]: Start isEmpty. Operand 5782 states and 10859 transitions. [2020-12-22 06:13:22,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-12-22 06:13:22,246 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:13:22,246 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 06:13:22,247 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 06:13:22,247 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:13:22,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:13:22,247 INFO L82 PathProgramCache]: Analyzing trace with hash -1307830931, now seen corresponding path program 1 times [2020-12-22 06:13:22,248 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:13:22,248 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541599521] [2020-12-22 06:13:22,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:13:22,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:13:22,447 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 06:13:22,447 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541599521] [2020-12-22 06:13:22,447 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:13:22,447 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 06:13:22,448 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973279959] [2020-12-22 06:13:22,448 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 06:13:22,448 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:13:22,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 06:13:22,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 06:13:22,449 INFO L87 Difference]: Start difference. First operand 5782 states and 10859 transitions. Second operand 4 states. [2020-12-22 06:13:23,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:13:23,184 INFO L93 Difference]: Finished difference Result 12661 states and 23744 transitions. [2020-12-22 06:13:23,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 06:13:23,184 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 60 [2020-12-22 06:13:23,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:13:23,211 INFO L225 Difference]: With dead ends: 12661 [2020-12-22 06:13:23,211 INFO L226 Difference]: Without dead ends: 10188 [2020-12-22 06:13:23,219 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 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 06:13:23,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10188 states. [2020-12-22 06:13:23,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10188 to 8146. [2020-12-22 06:13:23,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8146 states. [2020-12-22 06:13:23,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8146 states to 8146 states and 15295 transitions. [2020-12-22 06:13:23,595 INFO L78 Accepts]: Start accepts. Automaton has 8146 states and 15295 transitions. Word has length 60 [2020-12-22 06:13:23,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:13:23,595 INFO L481 AbstractCegarLoop]: Abstraction has 8146 states and 15295 transitions. [2020-12-22 06:13:23,595 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 06:13:23,596 INFO L276 IsEmpty]: Start isEmpty. Operand 8146 states and 15295 transitions. [2020-12-22 06:13:23,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-12-22 06:13:23,598 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:13:23,598 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 06:13:23,598 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 06:13:23,598 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:13:23,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:13:23,599 INFO L82 PathProgramCache]: Analyzing trace with hash -2125479381, now seen corresponding path program 1 times [2020-12-22 06:13:23,599 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:13:23,599 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376443341] [2020-12-22 06:13:23,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:13:23,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:13:23,701 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 06:13:23,701 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376443341] [2020-12-22 06:13:23,701 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:13:23,702 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 06:13:23,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668412472] [2020-12-22 06:13:23,702 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 06:13:23,702 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:13:23,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 06:13:23,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-12-22 06:13:23,703 INFO L87 Difference]: Start difference. First operand 8146 states and 15295 transitions. Second operand 6 states. [2020-12-22 06:13:25,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:13:25,362 INFO L93 Difference]: Finished difference Result 36418 states and 68464 transitions. [2020-12-22 06:13:25,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 06:13:25,363 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 60 [2020-12-22 06:13:25,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:13:25,430 INFO L225 Difference]: With dead ends: 36418 [2020-12-22 06:13:25,430 INFO L226 Difference]: Without dead ends: 28470 [2020-12-22 06:13:25,452 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2020-12-22 06:13:25,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28470 states. [2020-12-22 06:13:26,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28470 to 22035. [2020-12-22 06:13:26,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22035 states. [2020-12-22 06:13:26,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22035 states to 22035 states and 41326 transitions. [2020-12-22 06:13:26,405 INFO L78 Accepts]: Start accepts. Automaton has 22035 states and 41326 transitions. Word has length 60 [2020-12-22 06:13:26,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:13:26,405 INFO L481 AbstractCegarLoop]: Abstraction has 22035 states and 41326 transitions. [2020-12-22 06:13:26,405 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 06:13:26,405 INFO L276 IsEmpty]: Start isEmpty. Operand 22035 states and 41326 transitions. [2020-12-22 06:13:26,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-12-22 06:13:26,407 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:13:26,407 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] [2020-12-22 06:13:26,408 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 06:13:26,408 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:13:26,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:13:26,409 INFO L82 PathProgramCache]: Analyzing trace with hash 1303872338, now seen corresponding path program 1 times [2020-12-22 06:13:26,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:13:26,409 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681716621] [2020-12-22 06:13:26,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:13:26,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:13:26,487 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 06:13:26,487 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681716621] [2020-12-22 06:13:26,487 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:13:26,487 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 06:13:26,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239539692] [2020-12-22 06:13:26,488 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 06:13:26,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:13:26,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 06:13:26,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-12-22 06:13:26,489 INFO L87 Difference]: Start difference. First operand 22035 states and 41326 transitions. Second operand 6 states. [2020-12-22 06:13:29,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:13:29,240 INFO L93 Difference]: Finished difference Result 102911 states and 192986 transitions. [2020-12-22 06:13:29,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 06:13:29,240 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 61 [2020-12-22 06:13:29,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:13:29,386 INFO L225 Difference]: With dead ends: 102911 [2020-12-22 06:13:29,386 INFO L226 Difference]: Without dead ends: 81075 [2020-12-22 06:13:29,436 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2020-12-22 06:13:29,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81075 states. [2020-12-22 06:13:32,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81075 to 62124. [2020-12-22 06:13:32,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62124 states. [2020-12-22 06:13:32,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62124 states to 62124 states and 116289 transitions. [2020-12-22 06:13:32,445 INFO L78 Accepts]: Start accepts. Automaton has 62124 states and 116289 transitions. Word has length 61 [2020-12-22 06:13:32,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:13:32,446 INFO L481 AbstractCegarLoop]: Abstraction has 62124 states and 116289 transitions. [2020-12-22 06:13:32,446 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 06:13:32,446 INFO L276 IsEmpty]: Start isEmpty. Operand 62124 states and 116289 transitions. [2020-12-22 06:13:32,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-12-22 06:13:32,448 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:13:32,448 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:13:32,448 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 06:13:32,449 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:13:32,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:13:32,449 INFO L82 PathProgramCache]: Analyzing trace with hash -207744496, now seen corresponding path program 1 times [2020-12-22 06:13:32,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:13:32,450 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984168061] [2020-12-22 06:13:32,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:13:32,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:13:32,529 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 06:13:32,529 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984168061] [2020-12-22 06:13:32,530 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:13:32,530 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 06:13:32,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849588927] [2020-12-22 06:13:32,530 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 06:13:32,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:13:32,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 06:13:32,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-12-22 06:13:32,531 INFO L87 Difference]: Start difference. First operand 62124 states and 116289 transitions. Second operand 6 states. [2020-12-22 06:13:40,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:13:40,840 INFO L93 Difference]: Finished difference Result 297432 states and 556530 transitions. [2020-12-22 06:13:40,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 06:13:40,840 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 62 [2020-12-22 06:13:40,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:13:41,567 INFO L225 Difference]: With dead ends: 297432 [2020-12-22 06:13:41,567 INFO L226 Difference]: Without dead ends: 235508 [2020-12-22 06:13:41,653 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2020-12-22 06:13:41,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235508 states. [2020-12-22 06:13:48,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235508 to 179285. [2020-12-22 06:13:48,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179285 states. [2020-12-22 06:13:49,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179285 states to 179285 states and 334996 transitions. [2020-12-22 06:13:49,526 INFO L78 Accepts]: Start accepts. Automaton has 179285 states and 334996 transitions. Word has length 62 [2020-12-22 06:13:49,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:13:49,527 INFO L481 AbstractCegarLoop]: Abstraction has 179285 states and 334996 transitions. [2020-12-22 06:13:49,527 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 06:13:49,527 INFO L276 IsEmpty]: Start isEmpty. Operand 179285 states and 334996 transitions. [2020-12-22 06:13:49,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-22 06:13:49,550 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:13:49,550 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] [2020-12-22 06:13:49,550 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 06:13:49,551 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:13:49,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:13:49,552 INFO L82 PathProgramCache]: Analyzing trace with hash -270563817, now seen corresponding path program 1 times [2020-12-22 06:13:49,552 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:13:49,555 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066592742] [2020-12-22 06:13:49,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:13:49,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:13:49,645 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 06:13:49,646 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066592742] [2020-12-22 06:13:49,646 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:13:49,646 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 06:13:49,652 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434598366] [2020-12-22 06:13:49,654 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 06:13:49,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:13:49,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 06:13:49,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-12-22 06:13:49,655 INFO L87 Difference]: Start difference. First operand 179285 states and 334996 transitions. Second operand 6 states. [2020-12-22 06:14:12,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:14:12,134 INFO L93 Difference]: Finished difference Result 871009 states and 1626936 transitions. [2020-12-22 06:14:12,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 06:14:12,135 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 63 [2020-12-22 06:14:12,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:14:14,266 INFO L225 Difference]: With dead ends: 871009 [2020-12-22 06:14:14,266 INFO L226 Difference]: Without dead ends: 691925 [2020-12-22 06:14:14,553 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2020-12-22 06:14:15,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 691925 states. [2020-12-22 06:14:37,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 691925 to 524534. [2020-12-22 06:14:37,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 524534 states. [2020-12-22 06:14:40,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 524534 states to 524534 states and 978685 transitions. [2020-12-22 06:14:40,488 INFO L78 Accepts]: Start accepts. Automaton has 524534 states and 978685 transitions. Word has length 63 [2020-12-22 06:14:40,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:14:40,488 INFO L481 AbstractCegarLoop]: Abstraction has 524534 states and 978685 transitions. [2020-12-22 06:14:40,488 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 06:14:40,489 INFO L276 IsEmpty]: Start isEmpty. Operand 524534 states and 978685 transitions. [2020-12-22 06:14:40,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 06:14:40,507 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:14:40,508 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:14:40,508 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 06:14:40,508 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:14:40,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:14:40,509 INFO L82 PathProgramCache]: Analyzing trace with hash 1629666805, now seen corresponding path program 1 times [2020-12-22 06:14:40,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:14:40,513 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200831329] [2020-12-22 06:14:40,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:14:40,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:14:40,612 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 06:14:40,613 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200831329] [2020-12-22 06:14:40,613 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:14:40,613 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 06:14:40,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50126210] [2020-12-22 06:14:40,615 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 06:14:40,615 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:14:40,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 06:14:40,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-12-22 06:14:40,616 INFO L87 Difference]: Start difference. First operand 524534 states and 978685 transitions. Second operand 6 states. [2020-12-22 06:15:53,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:15:53,144 INFO L93 Difference]: Finished difference Result 2570882 states and 4795878 transitions. [2020-12-22 06:15:53,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 06:15:53,144 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 64 [2020-12-22 06:15:53,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:16:04,001 INFO L225 Difference]: With dead ends: 2570882 [2020-12-22 06:16:04,001 INFO L226 Difference]: Without dead ends: 2046550 [2020-12-22 06:16:05,126 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2020-12-22 06:16:08,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2046550 states.