/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_spec2_product25.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 06:06:18,585 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 06:06:18,588 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 06:06:18,630 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 06:06:18,630 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 06:06:18,632 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 06:06:18,634 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 06:06:18,637 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 06:06:18,639 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 06:06:18,641 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 06:06:18,642 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 06:06:18,644 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 06:06:18,644 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 06:06:18,646 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 06:06:18,647 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 06:06:18,649 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 06:06:18,669 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 06:06:18,671 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 06:06:18,674 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 06:06:18,677 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 06:06:18,679 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 06:06:18,682 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 06:06:18,686 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 06:06:18,688 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 06:06:18,699 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 06:06:18,711 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 06:06:18,713 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 06:06:18,716 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 06:06:18,717 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 06:06:18,720 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 06:06:18,721 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 06:06:18,722 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 06:06:18,722 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 06:06:18,723 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 06:06:18,725 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 06:06:18,726 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 06:06:18,728 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 06:06:18,785 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 06:06:18,788 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 06:06:18,790 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 06:06:18,790 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 06:06:18,790 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 06:06:18,791 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 06:06:18,791 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 06:06:18,791 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 06:06:18,791 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 06:06:18,792 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 06:06:18,792 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 06:06:18,792 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 06:06:18,793 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 06:06:18,793 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 06:06:18,793 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 06:06:18,794 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 06:06:18,794 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 06:06:18,794 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 06:06:18,794 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 06:06:18,795 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 06:06:18,795 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 06:06:18,795 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 06:06:18,796 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 06:06:18,796 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 06:06:18,796 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 06:06:18,797 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 06:06:19,181 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 06:06:19,242 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 06:06:19,245 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 06:06:19,247 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 06:06:19,248 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 06:06:19,249 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/product-lines/elevator_spec2_product25.cil.c [2020-12-22 06:06:19,352 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/58d9a7988/7a3228a46d5b4f91bc561c61fbc0fe82/FLAG256b359da [2020-12-22 06:06:20,357 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 06:06:20,358 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/product-lines/elevator_spec2_product25.cil.c [2020-12-22 06:06:20,386 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/58d9a7988/7a3228a46d5b4f91bc561c61fbc0fe82/FLAG256b359da [2020-12-22 06:06:20,478 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/58d9a7988/7a3228a46d5b4f91bc561c61fbc0fe82 [2020-12-22 06:06:20,482 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 06:06:20,484 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 06:06:20,486 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 06:06:20,486 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 06:06:20,490 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 06:06:20,491 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 06:06:20" (1/1) ... [2020-12-22 06:06:20,492 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5e318d95 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:06:20, skipping insertion in model container [2020-12-22 06:06:20,492 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 06:06:20" (1/1) ... [2020-12-22 06:06:20,501 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 06:06:20,568 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 06:06:21,386 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_spec2_product25.cil.c[65907,65920] [2020-12-22 06:06:21,425 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 06:06:21,438 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 06:06:21,567 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_spec2_product25.cil.c[65907,65920] [2020-12-22 06:06:21,585 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 06:06:21,652 INFO L208 MainTranslator]: Completed translation [2020-12-22 06:06:21,653 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:06:21 WrapperNode [2020-12-22 06:06:21,653 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 06:06:21,654 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 06:06:21,655 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 06:06:21,655 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 06:06:21,664 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:06:21" (1/1) ... [2020-12-22 06:06:21,711 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:06:21" (1/1) ... [2020-12-22 06:06:21,904 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 06:06:21,904 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 06:06:21,905 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 06:06:21,905 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 06:06:21,915 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:06:21" (1/1) ... [2020-12-22 06:06:21,916 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:06:21" (1/1) ... [2020-12-22 06:06:21,939 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:06:21" (1/1) ... [2020-12-22 06:06:21,940 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:06:21" (1/1) ... [2020-12-22 06:06:22,028 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:06:21" (1/1) ... [2020-12-22 06:06:22,100 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:06:21" (1/1) ... [2020-12-22 06:06:22,123 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:06:21" (1/1) ... [2020-12-22 06:06:22,162 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 06:06:22,165 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 06:06:22,165 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 06:06:22,165 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 06:06:22,166 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:06:21" (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 06:06:22,292 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 06:06:22,292 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 06:06:22,293 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 06:06:22,293 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 06:06:28,954 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 06:06:28,955 INFO L299 CfgBuilder]: Removed 601 assume(true) statements. [2020-12-22 06:06:28,960 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 06:06:28 BoogieIcfgContainer [2020-12-22 06:06:28,960 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 06:06:28,962 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 06:06:28,962 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 06:06:28,966 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 06:06:28,966 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 06:06:20" (1/3) ... [2020-12-22 06:06:28,967 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6cd41144 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 06:06:28, skipping insertion in model container [2020-12-22 06:06:28,967 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:06:21" (2/3) ... [2020-12-22 06:06:28,967 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6cd41144 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 06:06:28, skipping insertion in model container [2020-12-22 06:06:28,968 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 06:06:28" (3/3) ... [2020-12-22 06:06:28,969 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec2_product25.cil.c [2020-12-22 06:06:28,977 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 06:06:28,985 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 5 error locations. [2020-12-22 06:06:29,006 INFO L253 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2020-12-22 06:06:29,062 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 06:06:29,062 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 06:06:29,062 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 06:06:29,063 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 06:06:29,063 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 06:06:29,063 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 06:06:29,063 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 06:06:29,063 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 06:06:29,125 INFO L276 IsEmpty]: Start isEmpty. Operand 2512 states. [2020-12-22 06:06:29,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-12-22 06:06:29,150 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:06:29,151 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:06:29,152 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 06:06:29,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:06:29,158 INFO L82 PathProgramCache]: Analyzing trace with hash -1730714921, now seen corresponding path program 1 times [2020-12-22 06:06:29,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:06:29,170 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125701647] [2020-12-22 06:06:29,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:06:29,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:06:29,679 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 06:06:29,681 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125701647] [2020-12-22 06:06:29,682 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:06:29,682 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 06:06:29,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226207041] [2020-12-22 06:06:29,687 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 06:06:29,688 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:06:29,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 06:06:29,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:06:29,702 INFO L87 Difference]: Start difference. First operand 2512 states. Second operand 3 states. [2020-12-22 06:06:29,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:06:29,935 INFO L93 Difference]: Finished difference Result 5015 states and 9457 transitions. [2020-12-22 06:06:29,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 06:06:29,937 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 38 [2020-12-22 06:06:29,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:06:30,000 INFO L225 Difference]: With dead ends: 5015 [2020-12-22 06:06:30,001 INFO L226 Difference]: Without dead ends: 2508 [2020-12-22 06:06:30,024 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 06:06:30,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2508 states. [2020-12-22 06:06:30,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2508 to 2508. [2020-12-22 06:06:30,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2508 states. [2020-12-22 06:06:30,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2508 states to 2508 states and 4719 transitions. [2020-12-22 06:06:30,317 INFO L78 Accepts]: Start accepts. Automaton has 2508 states and 4719 transitions. Word has length 38 [2020-12-22 06:06:30,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:06:30,318 INFO L481 AbstractCegarLoop]: Abstraction has 2508 states and 4719 transitions. [2020-12-22 06:06:30,318 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 06:06:30,318 INFO L276 IsEmpty]: Start isEmpty. Operand 2508 states and 4719 transitions. [2020-12-22 06:06:30,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-12-22 06:06:30,323 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:06:30,324 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 06:06:30,325 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 06:06:30,325 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 06:06:30,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:06:30,328 INFO L82 PathProgramCache]: Analyzing trace with hash 1884272208, now seen corresponding path program 1 times [2020-12-22 06:06:30,328 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:06:30,329 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826948530] [2020-12-22 06:06:30,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:06:30,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:06:30,540 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 06:06:30,541 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826948530] [2020-12-22 06:06:30,541 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:06:30,541 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 06:06:30,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871476208] [2020-12-22 06:06:30,545 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 06:06:30,545 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:06:30,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 06:06:30,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 06:06:30,547 INFO L87 Difference]: Start difference. First operand 2508 states and 4719 transitions. Second operand 4 states. [2020-12-22 06:06:30,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:06:30,725 INFO L93 Difference]: Finished difference Result 4967 states and 9354 transitions. [2020-12-22 06:06:30,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 06:06:30,726 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 45 [2020-12-22 06:06:30,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:06:30,743 INFO L225 Difference]: With dead ends: 4967 [2020-12-22 06:06:30,744 INFO L226 Difference]: Without dead ends: 2481 [2020-12-22 06:06:30,750 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 06:06:30,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2481 states. [2020-12-22 06:06:30,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2481 to 2481. [2020-12-22 06:06:30,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2481 states. [2020-12-22 06:06:30,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2481 states to 2481 states and 4663 transitions. [2020-12-22 06:06:30,853 INFO L78 Accepts]: Start accepts. Automaton has 2481 states and 4663 transitions. Word has length 45 [2020-12-22 06:06:30,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:06:30,854 INFO L481 AbstractCegarLoop]: Abstraction has 2481 states and 4663 transitions. [2020-12-22 06:06:30,854 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 06:06:30,854 INFO L276 IsEmpty]: Start isEmpty. Operand 2481 states and 4663 transitions. [2020-12-22 06:06:30,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-12-22 06:06:30,860 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:06:30,861 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 06:06:30,861 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 06:06:30,864 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 06:06:30,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:06:30,865 INFO L82 PathProgramCache]: Analyzing trace with hash -1368119950, now seen corresponding path program 1 times [2020-12-22 06:06:30,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:06:30,866 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108473607] [2020-12-22 06:06:30,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:06:30,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:06:31,028 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 06:06:31,030 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108473607] [2020-12-22 06:06:31,030 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:06:31,031 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 06:06:31,031 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373577299] [2020-12-22 06:06:31,032 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 06:06:31,032 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:06:31,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 06:06:31,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 06:06:31,033 INFO L87 Difference]: Start difference. First operand 2481 states and 4663 transitions. Second operand 4 states. [2020-12-22 06:06:31,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:06:31,218 INFO L93 Difference]: Finished difference Result 4940 states and 9298 transitions. [2020-12-22 06:06:31,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 06:06:31,219 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 46 [2020-12-22 06:06:31,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:06:31,235 INFO L225 Difference]: With dead ends: 4940 [2020-12-22 06:06:31,235 INFO L226 Difference]: Without dead ends: 2481 [2020-12-22 06:06:31,241 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 06:06:31,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2481 states. [2020-12-22 06:06:31,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2481 to 2481. [2020-12-22 06:06:31,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2481 states. [2020-12-22 06:06:31,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2481 states to 2481 states and 4662 transitions. [2020-12-22 06:06:31,338 INFO L78 Accepts]: Start accepts. Automaton has 2481 states and 4662 transitions. Word has length 46 [2020-12-22 06:06:31,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:06:31,346 INFO L481 AbstractCegarLoop]: Abstraction has 2481 states and 4662 transitions. [2020-12-22 06:06:31,347 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 06:06:31,347 INFO L276 IsEmpty]: Start isEmpty. Operand 2481 states and 4662 transitions. [2020-12-22 06:06:31,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-12-22 06:06:31,350 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:06:31,350 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 06:06:31,350 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 06:06:31,350 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 06:06:31,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:06:31,351 INFO L82 PathProgramCache]: Analyzing trace with hash 567572749, now seen corresponding path program 1 times [2020-12-22 06:06:31,351 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:06:31,352 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628782737] [2020-12-22 06:06:31,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:06:31,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:06:31,461 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 06:06:31,462 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628782737] [2020-12-22 06:06:31,462 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:06:31,463 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 06:06:31,463 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394291175] [2020-12-22 06:06:31,464 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 06:06:31,464 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:06:31,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 06:06:31,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 06:06:31,465 INFO L87 Difference]: Start difference. First operand 2481 states and 4662 transitions. Second operand 4 states. [2020-12-22 06:06:31,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:06:31,620 INFO L93 Difference]: Finished difference Result 4940 states and 9297 transitions. [2020-12-22 06:06:31,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 06:06:31,621 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 47 [2020-12-22 06:06:31,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:06:31,636 INFO L225 Difference]: With dead ends: 4940 [2020-12-22 06:06:31,637 INFO L226 Difference]: Without dead ends: 2481 [2020-12-22 06:06:31,642 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 06:06:31,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2481 states. [2020-12-22 06:06:31,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2481 to 2481. [2020-12-22 06:06:31,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2481 states. [2020-12-22 06:06:31,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2481 states to 2481 states and 4661 transitions. [2020-12-22 06:06:31,827 INFO L78 Accepts]: Start accepts. Automaton has 2481 states and 4661 transitions. Word has length 47 [2020-12-22 06:06:31,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:06:31,827 INFO L481 AbstractCegarLoop]: Abstraction has 2481 states and 4661 transitions. [2020-12-22 06:06:31,827 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 06:06:31,827 INFO L276 IsEmpty]: Start isEmpty. Operand 2481 states and 4661 transitions. [2020-12-22 06:06:31,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-12-22 06:06:31,830 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:06:31,830 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 06:06:31,831 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 06:06:31,831 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 06:06:31,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:06:31,832 INFO L82 PathProgramCache]: Analyzing trace with hash 501084909, now seen corresponding path program 1 times [2020-12-22 06:06:31,832 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:06:31,832 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573023863] [2020-12-22 06:06:31,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:06:31,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:06:31,945 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 06:06:31,946 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573023863] [2020-12-22 06:06:31,946 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:06:31,946 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 06:06:31,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346387146] [2020-12-22 06:06:31,947 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 06:06:31,947 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:06:31,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 06:06:31,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 06:06:31,948 INFO L87 Difference]: Start difference. First operand 2481 states and 4661 transitions. Second operand 4 states. [2020-12-22 06:06:32,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:06:32,096 INFO L93 Difference]: Finished difference Result 4940 states and 9296 transitions. [2020-12-22 06:06:32,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 06:06:32,097 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 48 [2020-12-22 06:06:32,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:06:32,112 INFO L225 Difference]: With dead ends: 4940 [2020-12-22 06:06:32,113 INFO L226 Difference]: Without dead ends: 2481 [2020-12-22 06:06:32,118 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 06:06:32,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2481 states. [2020-12-22 06:06:32,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2481 to 2481. [2020-12-22 06:06:32,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2481 states. [2020-12-22 06:06:32,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2481 states to 2481 states and 4660 transitions. [2020-12-22 06:06:32,208 INFO L78 Accepts]: Start accepts. Automaton has 2481 states and 4660 transitions. Word has length 48 [2020-12-22 06:06:32,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:06:32,210 INFO L481 AbstractCegarLoop]: Abstraction has 2481 states and 4660 transitions. [2020-12-22 06:06:32,210 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 06:06:32,210 INFO L276 IsEmpty]: Start isEmpty. Operand 2481 states and 4660 transitions. [2020-12-22 06:06:32,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-12-22 06:06:32,214 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:06:32,215 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 06:06:32,215 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 06:06:32,215 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 06:06:32,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:06:32,216 INFO L82 PathProgramCache]: Analyzing trace with hash -1503457496, now seen corresponding path program 1 times [2020-12-22 06:06:32,216 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:06:32,216 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978241528] [2020-12-22 06:06:32,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:06:32,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:06:32,322 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 06:06:32,322 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978241528] [2020-12-22 06:06:32,322 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:06:32,323 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 06:06:32,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351655306] [2020-12-22 06:06:32,325 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 06:06:32,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:06:32,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 06:06:32,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 06:06:32,326 INFO L87 Difference]: Start difference. First operand 2481 states and 4660 transitions. Second operand 4 states. [2020-12-22 06:06:32,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:06:32,493 INFO L93 Difference]: Finished difference Result 4940 states and 9295 transitions. [2020-12-22 06:06:32,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 06:06:32,494 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 49 [2020-12-22 06:06:32,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:06:32,512 INFO L225 Difference]: With dead ends: 4940 [2020-12-22 06:06:32,513 INFO L226 Difference]: Without dead ends: 2481 [2020-12-22 06:06:32,519 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 06:06:32,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2481 states. [2020-12-22 06:06:32,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2481 to 2481. [2020-12-22 06:06:32,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2481 states. [2020-12-22 06:06:32,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2481 states to 2481 states and 4659 transitions. [2020-12-22 06:06:32,622 INFO L78 Accepts]: Start accepts. Automaton has 2481 states and 4659 transitions. Word has length 49 [2020-12-22 06:06:32,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:06:32,623 INFO L481 AbstractCegarLoop]: Abstraction has 2481 states and 4659 transitions. [2020-12-22 06:06:32,623 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 06:06:32,623 INFO L276 IsEmpty]: Start isEmpty. Operand 2481 states and 4659 transitions. [2020-12-22 06:06:32,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-12-22 06:06:32,626 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:06:32,626 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 06:06:32,626 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 06:06:32,627 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 06:06:32,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:06:32,633 INFO L82 PathProgramCache]: Analyzing trace with hash 836818024, now seen corresponding path program 1 times [2020-12-22 06:06:32,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:06:32,633 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194473531] [2020-12-22 06:06:32,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:06:32,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:06:32,712 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 06:06:32,712 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194473531] [2020-12-22 06:06:32,712 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:06:32,713 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 06:06:32,714 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025869061] [2020-12-22 06:06:32,714 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 06:06:32,715 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:06:32,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 06:06:32,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 06:06:32,716 INFO L87 Difference]: Start difference. First operand 2481 states and 4659 transitions. Second operand 4 states. [2020-12-22 06:06:32,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:06:32,859 INFO L93 Difference]: Finished difference Result 4940 states and 9294 transitions. [2020-12-22 06:06:32,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 06:06:32,860 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 50 [2020-12-22 06:06:32,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:06:32,875 INFO L225 Difference]: With dead ends: 4940 [2020-12-22 06:06:32,875 INFO L226 Difference]: Without dead ends: 2481 [2020-12-22 06:06:32,881 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 06:06:32,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2481 states. [2020-12-22 06:06:32,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2481 to 2481. [2020-12-22 06:06:32,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2481 states. [2020-12-22 06:06:33,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2481 states to 2481 states and 4658 transitions. [2020-12-22 06:06:33,026 INFO L78 Accepts]: Start accepts. Automaton has 2481 states and 4658 transitions. Word has length 50 [2020-12-22 06:06:33,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:06:33,027 INFO L481 AbstractCegarLoop]: Abstraction has 2481 states and 4658 transitions. [2020-12-22 06:06:33,027 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 06:06:33,027 INFO L276 IsEmpty]: Start isEmpty. Operand 2481 states and 4658 transitions. [2020-12-22 06:06:33,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-12-22 06:06:33,029 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:06:33,029 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 06:06:33,030 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 06:06:33,030 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 06:06:33,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:06:33,030 INFO L82 PathProgramCache]: Analyzing trace with hash 427495747, now seen corresponding path program 1 times [2020-12-22 06:06:33,031 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:06:33,031 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849671299] [2020-12-22 06:06:33,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:06:33,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:06:33,123 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 06:06:33,123 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849671299] [2020-12-22 06:06:33,123 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:06:33,124 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 06:06:33,124 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551378123] [2020-12-22 06:06:33,124 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 06:06:33,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:06:33,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 06:06:33,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 06:06:33,126 INFO L87 Difference]: Start difference. First operand 2481 states and 4658 transitions. Second operand 4 states. [2020-12-22 06:06:33,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:06:33,261 INFO L93 Difference]: Finished difference Result 4934 states and 9282 transitions. [2020-12-22 06:06:33,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 06:06:33,262 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 51 [2020-12-22 06:06:33,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:06:33,277 INFO L225 Difference]: With dead ends: 4934 [2020-12-22 06:06:33,277 INFO L226 Difference]: Without dead ends: 2481 [2020-12-22 06:06:33,282 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 06:06:33,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2481 states. [2020-12-22 06:06:33,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2481 to 2481. [2020-12-22 06:06:33,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2481 states. [2020-12-22 06:06:33,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2481 states to 2481 states and 4657 transitions. [2020-12-22 06:06:33,380 INFO L78 Accepts]: Start accepts. Automaton has 2481 states and 4657 transitions. Word has length 51 [2020-12-22 06:06:33,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:06:33,383 INFO L481 AbstractCegarLoop]: Abstraction has 2481 states and 4657 transitions. [2020-12-22 06:06:33,383 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 06:06:33,383 INFO L276 IsEmpty]: Start isEmpty. Operand 2481 states and 4657 transitions. [2020-12-22 06:06:33,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-12-22 06:06:33,386 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:06:33,386 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 06:06:33,386 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 06:06:33,387 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 06:06:33,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:06:33,387 INFO L82 PathProgramCache]: Analyzing trace with hash -879979757, now seen corresponding path program 1 times [2020-12-22 06:06:33,388 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:06:33,388 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913824117] [2020-12-22 06:06:33,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:06:33,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:06:33,487 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 06:06:33,492 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913824117] [2020-12-22 06:06:33,492 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:06:33,493 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 06:06:33,493 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093668967] [2020-12-22 06:06:33,494 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 06:06:33,495 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:06:33,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 06:06:33,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 06:06:33,497 INFO L87 Difference]: Start difference. First operand 2481 states and 4657 transitions. Second operand 5 states. [2020-12-22 06:06:35,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:06:35,279 INFO L93 Difference]: Finished difference Result 9971 states and 18701 transitions. [2020-12-22 06:06:35,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 06:06:35,280 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 52 [2020-12-22 06:06:35,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:06:35,314 INFO L225 Difference]: With dead ends: 9971 [2020-12-22 06:06:35,314 INFO L226 Difference]: Without dead ends: 7533 [2020-12-22 06:06:35,322 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 06:06:35,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7533 states. [2020-12-22 06:06:35,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7533 to 2485. [2020-12-22 06:06:35,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2485 states. [2020-12-22 06:06:35,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2485 states to 2485 states and 4661 transitions. [2020-12-22 06:06:35,476 INFO L78 Accepts]: Start accepts. Automaton has 2485 states and 4661 transitions. Word has length 52 [2020-12-22 06:06:35,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:06:35,476 INFO L481 AbstractCegarLoop]: Abstraction has 2485 states and 4661 transitions. [2020-12-22 06:06:35,476 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 06:06:35,476 INFO L276 IsEmpty]: Start isEmpty. Operand 2485 states and 4661 transitions. [2020-12-22 06:06:35,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-12-22 06:06:35,479 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:06:35,480 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] [2020-12-22 06:06:35,480 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 06:06:35,480 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 06:06:35,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:06:35,481 INFO L82 PathProgramCache]: Analyzing trace with hash -489285685, now seen corresponding path program 1 times [2020-12-22 06:06:35,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:06:35,481 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514153491] [2020-12-22 06:06:35,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:06:35,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:06:35,542 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 06:06:35,542 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514153491] [2020-12-22 06:06:35,542 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:06:35,542 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 06:06:35,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664292325] [2020-12-22 06:06:35,543 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 06:06:35,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:06:35,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 06:06:35,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 06:06:35,544 INFO L87 Difference]: Start difference. First operand 2485 states and 4661 transitions. Second operand 4 states. [2020-12-22 06:06:37,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:06:37,235 INFO L93 Difference]: Finished difference Result 7243 states and 13542 transitions. [2020-12-22 06:06:37,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 06:06:37,236 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 53 [2020-12-22 06:06:37,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:06:37,254 INFO L225 Difference]: With dead ends: 7243 [2020-12-22 06:06:37,254 INFO L226 Difference]: Without dead ends: 4788 [2020-12-22 06:06:37,260 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 06:06:37,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4788 states. [2020-12-22 06:06:37,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4788 to 3428. [2020-12-22 06:06:37,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3428 states. [2020-12-22 06:06:37,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3428 states to 3428 states and 6370 transitions. [2020-12-22 06:06:37,459 INFO L78 Accepts]: Start accepts. Automaton has 3428 states and 6370 transitions. Word has length 53 [2020-12-22 06:06:37,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:06:37,460 INFO L481 AbstractCegarLoop]: Abstraction has 3428 states and 6370 transitions. [2020-12-22 06:06:37,460 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 06:06:37,460 INFO L276 IsEmpty]: Start isEmpty. Operand 3428 states and 6370 transitions. [2020-12-22 06:06:37,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-12-22 06:06:37,462 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:06:37,463 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] [2020-12-22 06:06:37,463 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 06:06:37,463 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 06:06:37,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:06:37,464 INFO L82 PathProgramCache]: Analyzing trace with hash -266811917, now seen corresponding path program 1 times [2020-12-22 06:06:37,464 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:06:37,464 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906911280] [2020-12-22 06:06:37,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:06:37,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:06:37,545 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 06:06:37,546 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906911280] [2020-12-22 06:06:37,546 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:06:37,546 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 06:06:37,547 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709823178] [2020-12-22 06:06:37,547 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 06:06:37,547 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:06:37,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 06:06:37,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 06:06:37,548 INFO L87 Difference]: Start difference. First operand 3428 states and 6370 transitions. Second operand 5 states. [2020-12-22 06:06:38,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:06:38,838 INFO L93 Difference]: Finished difference Result 24708 states and 46129 transitions. [2020-12-22 06:06:38,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 06:06:38,839 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 55 [2020-12-22 06:06:38,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:06:38,900 INFO L225 Difference]: With dead ends: 24708 [2020-12-22 06:06:38,901 INFO L226 Difference]: Without dead ends: 21319 [2020-12-22 06:06:38,913 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 06:06:38,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21319 states. [2020-12-22 06:06:39,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21319 to 6300. [2020-12-22 06:06:39,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6300 states. [2020-12-22 06:06:39,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6300 states to 6300 states and 11752 transitions. [2020-12-22 06:06:39,326 INFO L78 Accepts]: Start accepts. Automaton has 6300 states and 11752 transitions. Word has length 55 [2020-12-22 06:06:39,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:06:39,327 INFO L481 AbstractCegarLoop]: Abstraction has 6300 states and 11752 transitions. [2020-12-22 06:06:39,327 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 06:06:39,327 INFO L276 IsEmpty]: Start isEmpty. Operand 6300 states and 11752 transitions. [2020-12-22 06:06:39,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-12-22 06:06:39,329 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:06:39,329 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] [2020-12-22 06:06:39,329 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 06:06:39,330 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 06:06:39,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:06:39,330 INFO L82 PathProgramCache]: Analyzing trace with hash -400825423, now seen corresponding path program 1 times [2020-12-22 06:06:39,331 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:06:39,331 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079464687] [2020-12-22 06:06:39,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:06:39,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:06:39,406 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 06:06:39,407 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079464687] [2020-12-22 06:06:39,407 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:06:39,407 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 06:06:39,408 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411363323] [2020-12-22 06:06:39,408 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 06:06:39,408 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:06:39,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 06:06:39,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 06:06:39,409 INFO L87 Difference]: Start difference. First operand 6300 states and 11752 transitions. Second operand 4 states. [2020-12-22 06:06:40,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:06:40,036 INFO L93 Difference]: Finished difference Result 15431 states and 28752 transitions. [2020-12-22 06:06:40,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 06:06:40,039 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 55 [2020-12-22 06:06:40,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:06:40,079 INFO L225 Difference]: With dead ends: 15431 [2020-12-22 06:06:40,080 INFO L226 Difference]: Without dead ends: 12755 [2020-12-22 06:06:40,089 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 06:06:40,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12755 states. [2020-12-22 06:06:40,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12755 to 8725. [2020-12-22 06:06:40,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8725 states. [2020-12-22 06:06:40,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8725 states to 8725 states and 16267 transitions. [2020-12-22 06:06:40,534 INFO L78 Accepts]: Start accepts. Automaton has 8725 states and 16267 transitions. Word has length 55 [2020-12-22 06:06:40,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:06:40,535 INFO L481 AbstractCegarLoop]: Abstraction has 8725 states and 16267 transitions. [2020-12-22 06:06:40,535 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 06:06:40,536 INFO L276 IsEmpty]: Start isEmpty. Operand 8725 states and 16267 transitions. [2020-12-22 06:06:40,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-12-22 06:06:40,540 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:06:40,540 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:06:40,540 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 06:06:40,541 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 06:06:40,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:06:40,541 INFO L82 PathProgramCache]: Analyzing trace with hash -664558661, now seen corresponding path program 1 times [2020-12-22 06:06:40,542 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:06:40,542 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413107185] [2020-12-22 06:06:40,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:06:40,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:06:40,621 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 06:06:40,621 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413107185] [2020-12-22 06:06:40,621 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:06:40,622 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 06:06:40,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168523852] [2020-12-22 06:06:40,622 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 06:06:40,622 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:06:40,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 06:06:40,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 06:06:40,624 INFO L87 Difference]: Start difference. First operand 8725 states and 16267 transitions. Second operand 4 states. [2020-12-22 06:06:41,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:06:41,207 INFO L93 Difference]: Finished difference Result 18111 states and 33651 transitions. [2020-12-22 06:06:41,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 06:06:41,207 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 57 [2020-12-22 06:06:41,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:06:41,244 INFO L225 Difference]: With dead ends: 18111 [2020-12-22 06:06:41,244 INFO L226 Difference]: Without dead ends: 13199 [2020-12-22 06:06:41,256 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 06:06:41,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13199 states. [2020-12-22 06:06:41,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13199 to 8735. [2020-12-22 06:06:41,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8735 states. [2020-12-22 06:06:41,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8735 states to 8735 states and 16273 transitions. [2020-12-22 06:06:41,697 INFO L78 Accepts]: Start accepts. Automaton has 8735 states and 16273 transitions. Word has length 57 [2020-12-22 06:06:41,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:06:41,697 INFO L481 AbstractCegarLoop]: Abstraction has 8735 states and 16273 transitions. [2020-12-22 06:06:41,697 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 06:06:41,697 INFO L276 IsEmpty]: Start isEmpty. Operand 8735 states and 16273 transitions. [2020-12-22 06:06:41,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-22 06:06:41,704 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:06:41,704 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:06:41,704 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 06:06:41,704 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 06:06:41,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:06:41,705 INFO L82 PathProgramCache]: Analyzing trace with hash -391620124, now seen corresponding path program 1 times [2020-12-22 06:06:41,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:06:41,705 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128956527] [2020-12-22 06:06:41,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:06:41,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:06:41,830 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 06:06:41,830 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128956527] [2020-12-22 06:06:41,830 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:06:41,831 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 06:06:41,831 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949683914] [2020-12-22 06:06:41,831 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 06:06:41,831 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:06:41,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 06:06:41,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-12-22 06:06:41,832 INFO L87 Difference]: Start difference. First operand 8735 states and 16273 transitions. Second operand 7 states. [2020-12-22 06:06:43,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:06:43,349 INFO L93 Difference]: Finished difference Result 22949 states and 42704 transitions. [2020-12-22 06:06:43,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 06:06:43,349 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 63 [2020-12-22 06:06:43,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:06:43,387 INFO L225 Difference]: With dead ends: 22949 [2020-12-22 06:06:43,387 INFO L226 Difference]: Without dead ends: 17858 [2020-12-22 06:06:43,403 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2020-12-22 06:06:43,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17858 states. [2020-12-22 06:06:43,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17858 to 8739. [2020-12-22 06:06:43,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8739 states. [2020-12-22 06:06:43,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8739 states to 8739 states and 16271 transitions. [2020-12-22 06:06:43,960 INFO L78 Accepts]: Start accepts. Automaton has 8739 states and 16271 transitions. Word has length 63 [2020-12-22 06:06:43,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:06:43,960 INFO L481 AbstractCegarLoop]: Abstraction has 8739 states and 16271 transitions. [2020-12-22 06:06:43,961 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 06:06:43,961 INFO L276 IsEmpty]: Start isEmpty. Operand 8739 states and 16271 transitions. [2020-12-22 06:06:43,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-22 06:06:43,963 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:06:43,963 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 06:06:43,964 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 06:06:43,964 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 06:06:43,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:06:43,964 INFO L82 PathProgramCache]: Analyzing trace with hash -172765406, now seen corresponding path program 1 times [2020-12-22 06:06:43,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:06:43,965 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990877919] [2020-12-22 06:06:43,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:06:44,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:06:44,061 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 06:06:44,062 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990877919] [2020-12-22 06:06:44,062 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:06:44,062 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 06:06:44,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454634959] [2020-12-22 06:06:44,063 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 06:06:44,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:06:44,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 06:06:44,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 06:06:44,066 INFO L87 Difference]: Start difference. First operand 8739 states and 16271 transitions. Second operand 5 states. [2020-12-22 06:06:44,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:06:44,718 INFO L93 Difference]: Finished difference Result 13650 states and 25406 transitions. [2020-12-22 06:06:44,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 06:06:44,718 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 63 [2020-12-22 06:06:44,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:06:44,734 INFO L225 Difference]: With dead ends: 13650 [2020-12-22 06:06:44,735 INFO L226 Difference]: Without dead ends: 8758 [2020-12-22 06:06:44,746 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 06:06:44,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8758 states. [2020-12-22 06:06:45,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8758 to 8739. [2020-12-22 06:06:45,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8739 states. [2020-12-22 06:06:45,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8739 states to 8739 states and 16256 transitions. [2020-12-22 06:06:45,171 INFO L78 Accepts]: Start accepts. Automaton has 8739 states and 16256 transitions. Word has length 63 [2020-12-22 06:06:45,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:06:45,171 INFO L481 AbstractCegarLoop]: Abstraction has 8739 states and 16256 transitions. [2020-12-22 06:06:45,171 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 06:06:45,171 INFO L276 IsEmpty]: Start isEmpty. Operand 8739 states and 16256 transitions. [2020-12-22 06:06:45,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-22 06:06:45,174 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:06:45,174 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 06:06:45,174 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 06:06:45,174 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 06:06:45,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:06:45,175 INFO L82 PathProgramCache]: Analyzing trace with hash -759571420, now seen corresponding path program 1 times [2020-12-22 06:06:45,175 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:06:45,175 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5860411] [2020-12-22 06:06:45,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:06:45,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:06:45,242 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 06:06:45,242 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5860411] [2020-12-22 06:06:45,243 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:06:45,243 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 06:06:45,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976055902] [2020-12-22 06:06:45,243 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 06:06:45,244 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:06:45,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 06:06:45,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:06:45,244 INFO L87 Difference]: Start difference. First operand 8739 states and 16256 transitions. Second operand 3 states. [2020-12-22 06:06:45,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:06:45,833 INFO L93 Difference]: Finished difference Result 24006 states and 44736 transitions. [2020-12-22 06:06:45,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 06:06:45,833 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 63 [2020-12-22 06:06:45,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:06:45,856 INFO L225 Difference]: With dead ends: 24006 [2020-12-22 06:06:45,856 INFO L226 Difference]: Without dead ends: 16935 [2020-12-22 06:06:45,867 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 06:06:45,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16935 states. [2020-12-22 06:06:46,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16935 to 16935. [2020-12-22 06:06:46,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16935 states. [2020-12-22 06:06:46,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16935 states to 16935 states and 31577 transitions. [2020-12-22 06:06:46,730 INFO L78 Accepts]: Start accepts. Automaton has 16935 states and 31577 transitions. Word has length 63 [2020-12-22 06:06:46,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:06:46,730 INFO L481 AbstractCegarLoop]: Abstraction has 16935 states and 31577 transitions. [2020-12-22 06:06:46,730 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 06:06:46,730 INFO L276 IsEmpty]: Start isEmpty. Operand 16935 states and 31577 transitions. [2020-12-22 06:06:46,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-12-22 06:06:46,734 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:06:46,734 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:06:46,734 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 06:06:46,734 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 06:06:46,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:06:46,735 INFO L82 PathProgramCache]: Analyzing trace with hash 1301615688, now seen corresponding path program 1 times [2020-12-22 06:06:46,735 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:06:46,735 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005433520] [2020-12-22 06:06:46,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:06:46,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:06:46,796 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 06:06:46,796 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005433520] [2020-12-22 06:06:46,797 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:06:46,797 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 06:06:46,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492676824] [2020-12-22 06:06:46,797 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 06:06:46,798 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:06:46,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 06:06:46,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:06:46,798 INFO L87 Difference]: Start difference. First operand 16935 states and 31577 transitions. Second operand 3 states. [2020-12-22 06:06:47,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:06:47,904 INFO L93 Difference]: Finished difference Result 47151 states and 87946 transitions. [2020-12-22 06:06:47,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 06:06:47,905 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 65 [2020-12-22 06:06:47,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:06:47,952 INFO L225 Difference]: With dead ends: 47151 [2020-12-22 06:06:47,952 INFO L226 Difference]: Without dead ends: 33097 [2020-12-22 06:06:47,973 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 06:06:48,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33097 states. [2020-12-22 06:06:49,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33097 to 33095. [2020-12-22 06:06:49,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33095 states. [2020-12-22 06:06:49,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33095 states to 33095 states and 61773 transitions. [2020-12-22 06:06:49,529 INFO L78 Accepts]: Start accepts. Automaton has 33095 states and 61773 transitions. Word has length 65 [2020-12-22 06:06:49,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:06:49,529 INFO L481 AbstractCegarLoop]: Abstraction has 33095 states and 61773 transitions. [2020-12-22 06:06:49,529 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 06:06:49,529 INFO L276 IsEmpty]: Start isEmpty. Operand 33095 states and 61773 transitions. [2020-12-22 06:06:49,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 06:06:49,533 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:06:49,533 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:06:49,533 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 06:06:49,533 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 06:06:49,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:06:49,534 INFO L82 PathProgramCache]: Analyzing trace with hash 510796111, now seen corresponding path program 1 times [2020-12-22 06:06:49,534 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:06:49,535 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296623801] [2020-12-22 06:06:49,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:06:49,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:06:49,606 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 06:06:49,607 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296623801] [2020-12-22 06:06:49,607 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:06:49,607 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 06:06:49,608 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570743991] [2020-12-22 06:06:49,608 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 06:06:49,608 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:06:49,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 06:06:49,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:06:49,609 INFO L87 Difference]: Start difference. First operand 33095 states and 61773 transitions. Second operand 3 states. [2020-12-22 06:06:51,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:06:51,912 INFO L93 Difference]: Finished difference Result 92946 states and 173417 transitions. [2020-12-22 06:06:51,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 06:06:51,913 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 66 [2020-12-22 06:06:51,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:06:52,010 INFO L225 Difference]: With dead ends: 92946 [2020-12-22 06:06:52,011 INFO L226 Difference]: Without dead ends: 64945 [2020-12-22 06:06:52,036 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 06:06:52,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64945 states. [2020-12-22 06:06:54,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64945 to 64941. [2020-12-22 06:06:54,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64941 states. [2020-12-22 06:06:54,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64941 states to 64941 states and 121253 transitions. [2020-12-22 06:06:54,673 INFO L78 Accepts]: Start accepts. Automaton has 64941 states and 121253 transitions. Word has length 66 [2020-12-22 06:06:54,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:06:54,673 INFO L481 AbstractCegarLoop]: Abstraction has 64941 states and 121253 transitions. [2020-12-22 06:06:54,673 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 06:06:54,673 INFO L276 IsEmpty]: Start isEmpty. Operand 64941 states and 121253 transitions. [2020-12-22 06:06:54,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-22 06:06:54,677 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:06:54,677 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:06:54,677 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 06:06:54,677 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 06:06:54,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:06:54,678 INFO L82 PathProgramCache]: Analyzing trace with hash -1345171729, now seen corresponding path program 1 times [2020-12-22 06:06:54,678 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:06:54,678 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278450802] [2020-12-22 06:06:54,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:06:54,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:06:54,748 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 06:06:54,748 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278450802] [2020-12-22 06:06:54,748 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:06:54,748 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 06:06:54,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778007516] [2020-12-22 06:06:54,749 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 06:06:54,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:06:54,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 06:06:54,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:06:54,750 INFO L87 Difference]: Start difference. First operand 64941 states and 121253 transitions. Second operand 3 states. [2020-12-22 06:06:59,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:06:59,970 INFO L93 Difference]: Finished difference Result 183529 states and 342426 transitions. [2020-12-22 06:06:59,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 06:06:59,970 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 67 [2020-12-22 06:06:59,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:07:00,226 INFO L225 Difference]: With dead ends: 183529 [2020-12-22 06:07:00,227 INFO L226 Difference]: Without dead ends: 127681 [2020-12-22 06:07:00,295 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 06:07:00,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127681 states. [2020-12-22 06:07:05,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127681 to 127675. [2020-12-22 06:07:05,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127675 states. [2020-12-22 06:07:05,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127675 states to 127675 states and 238369 transitions. [2020-12-22 06:07:05,363 INFO L78 Accepts]: Start accepts. Automaton has 127675 states and 238369 transitions. Word has length 67 [2020-12-22 06:07:05,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:07:05,363 INFO L481 AbstractCegarLoop]: Abstraction has 127675 states and 238369 transitions. [2020-12-22 06:07:05,363 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 06:07:05,363 INFO L276 IsEmpty]: Start isEmpty. Operand 127675 states and 238369 transitions. [2020-12-22 06:07:05,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-12-22 06:07:05,366 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:07:05,366 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:07:05,366 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 06:07:05,366 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:07:05,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:07:05,367 INFO L82 PathProgramCache]: Analyzing trace with hash 1249367384, now seen corresponding path program 1 times [2020-12-22 06:07:05,367 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:07:05,367 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147358538] [2020-12-22 06:07:05,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:07:05,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:07:05,731 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 06:07:05,732 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147358538] [2020-12-22 06:07:05,732 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:07:05,732 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 06:07:05,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578225234] [2020-12-22 06:07:05,733 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 06:07:05,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:07:05,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 06:07:05,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:07:05,734 INFO L87 Difference]: Start difference. First operand 127675 states and 238369 transitions. Second operand 3 states. [2020-12-22 06:07:13,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:07:13,748 INFO L93 Difference]: Finished difference Result 362664 states and 676542 transitions. [2020-12-22 06:07:13,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 06:07:13,749 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 68 [2020-12-22 06:07:13,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:07:14,509 INFO L225 Difference]: With dead ends: 362664 [2020-12-22 06:07:14,509 INFO L226 Difference]: Without dead ends: 251220 [2020-12-22 06:07:14,636 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 06:07:14,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251220 states. [2020-12-22 06:07:23,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251220 to 251212. [2020-12-22 06:07:23,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 251212 states. [2020-12-22 06:07:24,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251212 states to 251212 states and 468866 transitions. [2020-12-22 06:07:24,888 INFO L78 Accepts]: Start accepts. Automaton has 251212 states and 468866 transitions. Word has length 68 [2020-12-22 06:07:24,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:07:24,888 INFO L481 AbstractCegarLoop]: Abstraction has 251212 states and 468866 transitions. [2020-12-22 06:07:24,888 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 06:07:24,888 INFO L276 IsEmpty]: Start isEmpty. Operand 251212 states and 468866 transitions. [2020-12-22 06:07:24,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-12-22 06:07:24,920 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:07:24,921 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:07:24,921 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-12-22 06:07:24,921 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:07:24,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:07:24,922 INFO L82 PathProgramCache]: Analyzing trace with hash -425689802, now seen corresponding path program 1 times [2020-12-22 06:07:24,922 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:07:24,925 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114482036] [2020-12-22 06:07:24,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:07:24,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:07:25,014 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 06:07:25,014 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114482036] [2020-12-22 06:07:25,014 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:07:25,015 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 06:07:25,015 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620323943] [2020-12-22 06:07:25,015 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 06:07:25,015 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:07:25,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 06:07:25,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 06:07:25,016 INFO L87 Difference]: Start difference. First operand 251212 states and 468866 transitions. Second operand 4 states. [2020-12-22 06:07:37,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:07:37,137 INFO L93 Difference]: Finished difference Result 555509 states and 1029768 transitions. [2020-12-22 06:07:37,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 06:07:37,138 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 101 [2020-12-22 06:07:37,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:07:37,817 INFO L225 Difference]: With dead ends: 555509 [2020-12-22 06:07:37,817 INFO L226 Difference]: Without dead ends: 304501 [2020-12-22 06:07:38,330 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 06:07:38,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304501 states. [2020-12-22 06:07:48,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304501 to 251598. [2020-12-22 06:07:48,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 251598 states. [2020-12-22 06:07:49,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251598 states to 251598 states and 469252 transitions. [2020-12-22 06:07:49,407 INFO L78 Accepts]: Start accepts. Automaton has 251598 states and 469252 transitions. Word has length 101 [2020-12-22 06:07:49,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:07:49,407 INFO L481 AbstractCegarLoop]: Abstraction has 251598 states and 469252 transitions. [2020-12-22 06:07:49,407 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 06:07:49,407 INFO L276 IsEmpty]: Start isEmpty. Operand 251598 states and 469252 transitions. [2020-12-22 06:07:49,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-12-22 06:07:49,431 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:07:49,431 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:07:49,431 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-12-22 06:07:49,431 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:07:49,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:07:49,432 INFO L82 PathProgramCache]: Analyzing trace with hash 217241808, now seen corresponding path program 1 times [2020-12-22 06:07:49,432 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:07:49,432 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929772035] [2020-12-22 06:07:49,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:07:49,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:07:49,508 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 06:07:49,512 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929772035] [2020-12-22 06:07:49,512 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:07:49,512 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 06:07:49,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707928116] [2020-12-22 06:07:49,513 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 06:07:49,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:07:49,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 06:07:49,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 06:07:49,514 INFO L87 Difference]: Start difference. First operand 251598 states and 469252 transitions. Second operand 4 states. [2020-12-22 06:08:02,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:08:02,318 INFO L93 Difference]: Finished difference Result 562169 states and 1046941 transitions. [2020-12-22 06:08:02,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 06:08:02,319 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 102 [2020-12-22 06:08:02,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:08:03,065 INFO L225 Difference]: With dead ends: 562169 [2020-12-22 06:08:03,065 INFO L226 Difference]: Without dead ends: 310604 [2020-12-22 06:08:03,285 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 06:08:03,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310604 states. [2020-12-22 06:08:14,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310604 to 155209. [2020-12-22 06:08:14,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155209 states. [2020-12-22 06:08:14,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155209 states to 155209 states and 289043 transitions. [2020-12-22 06:08:14,520 INFO L78 Accepts]: Start accepts. Automaton has 155209 states and 289043 transitions. Word has length 102 [2020-12-22 06:08:14,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:08:14,521 INFO L481 AbstractCegarLoop]: Abstraction has 155209 states and 289043 transitions. [2020-12-22 06:08:14,521 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 06:08:14,521 INFO L276 IsEmpty]: Start isEmpty. Operand 155209 states and 289043 transitions. [2020-12-22 06:08:14,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2020-12-22 06:08:14,568 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:08:14,569 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:08:14,569 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-12-22 06:08:14,569 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:08:14,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:08:14,570 INFO L82 PathProgramCache]: Analyzing trace with hash 1117270462, now seen corresponding path program 1 times [2020-12-22 06:08:14,570 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:08:14,570 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016888334] [2020-12-22 06:08:14,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:08:14,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:08:14,666 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 06:08:14,666 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016888334] [2020-12-22 06:08:14,666 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:08:14,667 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 06:08:14,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058053457] [2020-12-22 06:08:14,667 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 06:08:14,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:08:14,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 06:08:14,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 06:08:14,668 INFO L87 Difference]: Start difference. First operand 155209 states and 289043 transitions. Second operand 5 states. [2020-12-22 06:08:26,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:08:26,686 INFO L93 Difference]: Finished difference Result 450647 states and 839014 transitions. [2020-12-22 06:08:26,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 06:08:26,686 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 144 [2020-12-22 06:08:26,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:08:27,508 INFO L225 Difference]: With dead ends: 450647 [2020-12-22 06:08:27,509 INFO L226 Difference]: Without dead ends: 295636 [2020-12-22 06:08:27,666 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 06:08:27,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295636 states. [2020-12-22 06:08:35,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295636 to 155209. [2020-12-22 06:08:35,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155209 states. [2020-12-22 06:08:35,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155209 states to 155209 states and 288915 transitions. [2020-12-22 06:08:35,862 INFO L78 Accepts]: Start accepts. Automaton has 155209 states and 288915 transitions. Word has length 144 [2020-12-22 06:08:35,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:08:35,862 INFO L481 AbstractCegarLoop]: Abstraction has 155209 states and 288915 transitions. [2020-12-22 06:08:35,862 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 06:08:35,862 INFO L276 IsEmpty]: Start isEmpty. Operand 155209 states and 288915 transitions. [2020-12-22 06:08:35,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-12-22 06:08:35,901 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:08:35,902 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:08:35,902 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-12-22 06:08:35,902 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:08:35,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:08:35,903 INFO L82 PathProgramCache]: Analyzing trace with hash -1380236890, now seen corresponding path program 1 times [2020-12-22 06:08:35,903 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:08:35,903 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878612623] [2020-12-22 06:08:35,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:08:35,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:08:35,999 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 06:08:35,999 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878612623] [2020-12-22 06:08:35,999 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:08:36,000 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 06:08:36,000 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146071234] [2020-12-22 06:08:36,000 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 06:08:36,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:08:36,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 06:08:36,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 06:08:36,001 INFO L87 Difference]: Start difference. First operand 155209 states and 288915 transitions. Second operand 5 states. [2020-12-22 06:08:48,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:08:48,057 INFO L93 Difference]: Finished difference Result 445954 states and 831519 transitions. [2020-12-22 06:08:48,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 06:08:48,058 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 148 [2020-12-22 06:08:48,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:08:48,936 INFO L225 Difference]: With dead ends: 445954 [2020-12-22 06:08:48,936 INFO L226 Difference]: Without dead ends: 290796 [2020-12-22 06:08:49,076 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 06:08:49,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290796 states. [2020-12-22 06:08:57,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290796 to 155209. [2020-12-22 06:08:57,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155209 states. [2020-12-22 06:08:57,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155209 states to 155209 states and 286603 transitions. [2020-12-22 06:08:57,509 INFO L78 Accepts]: Start accepts. Automaton has 155209 states and 286603 transitions. Word has length 148 [2020-12-22 06:08:57,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:08:57,509 INFO L481 AbstractCegarLoop]: Abstraction has 155209 states and 286603 transitions. [2020-12-22 06:08:57,509 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 06:08:57,509 INFO L276 IsEmpty]: Start isEmpty. Operand 155209 states and 286603 transitions. [2020-12-22 06:08:57,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2020-12-22 06:08:57,559 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:08:57,560 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:08:57,560 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-12-22 06:08:57,560 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:08:57,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:08:57,561 INFO L82 PathProgramCache]: Analyzing trace with hash 1183814747, now seen corresponding path program 1 times [2020-12-22 06:08:57,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:08:57,561 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001287161] [2020-12-22 06:08:57,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:08:57,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:08:57,716 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 06:08:57,717 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001287161] [2020-12-22 06:08:57,718 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:08:57,718 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 06:08:57,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713935957] [2020-12-22 06:08:57,718 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 06:08:57,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:08:57,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 06:08:57,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 06:08:57,719 INFO L87 Difference]: Start difference. First operand 155209 states and 286603 transitions. Second operand 5 states. [2020-12-22 06:09:12,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:09:12,380 INFO L93 Difference]: Finished difference Result 448399 states and 829635 transitions. [2020-12-22 06:09:12,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 06:09:12,381 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 149 [2020-12-22 06:09:12,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:09:13,265 INFO L225 Difference]: With dead ends: 448399 [2020-12-22 06:09:13,266 INFO L226 Difference]: Without dead ends: 293388 [2020-12-22 06:09:13,432 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 06:09:13,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293388 states. [2020-12-22 06:09:26,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293388 to 292425. [2020-12-22 06:09:26,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 292425 states. [2020-12-22 06:09:27,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292425 states to 292425 states and 541631 transitions. [2020-12-22 06:09:27,376 INFO L78 Accepts]: Start accepts. Automaton has 292425 states and 541631 transitions. Word has length 149 [2020-12-22 06:09:27,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:09:27,376 INFO L481 AbstractCegarLoop]: Abstraction has 292425 states and 541631 transitions. [2020-12-22 06:09:27,376 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 06:09:27,376 INFO L276 IsEmpty]: Start isEmpty. Operand 292425 states and 541631 transitions. [2020-12-22 06:09:27,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2020-12-22 06:09:27,923 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:09:27,923 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:09:27,923 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-12-22 06:09:27,923 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:09:27,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:09:27,924 INFO L82 PathProgramCache]: Analyzing trace with hash -486326238, now seen corresponding path program 1 times [2020-12-22 06:09:27,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:09:27,924 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631983842] [2020-12-22 06:09:27,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:09:27,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:09:28,111 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 06:09:28,112 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631983842] [2020-12-22 06:09:28,112 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:09:28,112 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 06:09:28,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405317529] [2020-12-22 06:09:28,113 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 06:09:28,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:09:28,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 06:09:28,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 06:09:28,114 INFO L87 Difference]: Start difference. First operand 292425 states and 541631 transitions. Second operand 5 states. [2020-12-22 06:09:43,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:09:43,407 INFO L93 Difference]: Finished difference Result 602511 states and 1113623 transitions. [2020-12-22 06:09:43,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 06:09:43,407 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 150 [2020-12-22 06:09:43,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:09:44,533 INFO L225 Difference]: With dead ends: 602511 [2020-12-22 06:09:44,534 INFO L226 Difference]: Without dead ends: 310284 [2020-12-22 06:09:44,819 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 06:09:45,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310284 states.