./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/locks/test_locks_10.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 54858612 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/locks/test_locks_10.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 6423b7e5fbcc52c08e52aff49c79db620dd407c4 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-5485861 [2020-10-25 19:38:56,456 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-25 19:38:56,462 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-25 19:38:56,537 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-25 19:38:56,538 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-25 19:38:56,544 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-25 19:38:56,547 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-25 19:38:56,555 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-25 19:38:56,562 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-25 19:38:56,566 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-25 19:38:56,568 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-25 19:38:56,570 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-25 19:38:56,571 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-25 19:38:56,577 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-25 19:38:56,579 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-25 19:38:56,582 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-25 19:38:56,583 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-25 19:38:56,587 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-25 19:38:56,591 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-25 19:38:56,597 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-25 19:38:56,600 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-25 19:38:56,602 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-25 19:38:56,606 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-25 19:38:56,607 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-25 19:38:56,619 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-25 19:38:56,619 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-25 19:38:56,620 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-25 19:38:56,622 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-25 19:38:56,623 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-25 19:38:56,624 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-25 19:38:56,625 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-25 19:38:56,626 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-25 19:38:56,628 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-25 19:38:56,629 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-25 19:38:56,630 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-25 19:38:56,631 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-25 19:38:56,631 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-25 19:38:56,632 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-25 19:38:56,632 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-25 19:38:56,634 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-25 19:38:56,635 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-25 19:38:56,636 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-25 19:38:56,694 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-25 19:38:56,695 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-25 19:38:56,698 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-25 19:38:56,699 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-25 19:38:56,699 INFO L138 SettingsManager]: * Use SBE=true [2020-10-25 19:38:56,700 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-25 19:38:56,700 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-25 19:38:56,700 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-25 19:38:56,700 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-25 19:38:56,701 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-25 19:38:56,702 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-25 19:38:56,703 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-25 19:38:56,703 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-25 19:38:56,703 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-25 19:38:56,704 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-25 19:38:56,704 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-25 19:38:56,704 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-25 19:38:56,705 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-25 19:38:56,705 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-25 19:38:56,705 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-25 19:38:56,706 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-25 19:38:56,706 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-25 19:38:56,707 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-25 19:38:56,707 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-25 19:38:56,708 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-25 19:38:56,708 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-25 19:38:56,708 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-25 19:38:56,709 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-25 19:38:56,709 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-25 19:38:56,709 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6423b7e5fbcc52c08e52aff49c79db620dd407c4 [2020-10-25 19:38:57,096 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-25 19:38:57,128 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-25 19:38:57,131 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-25 19:38:57,133 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-25 19:38:57,135 INFO L275 PluginConnector]: CDTParser initialized [2020-10-25 19:38:57,136 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/locks/test_locks_10.c [2020-10-25 19:38:57,222 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7c7baf087/d7c4473be4164f34b0f0edcf53714095/FLAG39e70b153 [2020-10-25 19:38:57,895 INFO L306 CDTParser]: Found 1 translation units. [2020-10-25 19:38:57,896 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/locks/test_locks_10.c [2020-10-25 19:38:57,910 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7c7baf087/d7c4473be4164f34b0f0edcf53714095/FLAG39e70b153 [2020-10-25 19:38:58,218 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7c7baf087/d7c4473be4164f34b0f0edcf53714095 [2020-10-25 19:38:58,222 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-25 19:38:58,227 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-25 19:38:58,229 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-25 19:38:58,230 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-25 19:38:58,234 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-25 19:38:58,235 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.10 07:38:58" (1/1) ... [2020-10-25 19:38:58,239 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1ccb3af0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 07:38:58, skipping insertion in model container [2020-10-25 19:38:58,240 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.10 07:38:58" (1/1) ... [2020-10-25 19:38:58,248 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-25 19:38:58,277 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-25 19:38:58,575 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-25 19:38:58,594 INFO L203 MainTranslator]: Completed pre-run [2020-10-25 19:38:58,652 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-25 19:38:58,673 INFO L208 MainTranslator]: Completed translation [2020-10-25 19:38:58,675 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 07:38:58 WrapperNode [2020-10-25 19:38:58,675 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-25 19:38:58,677 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-25 19:38:58,677 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-25 19:38:58,677 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-25 19:38:58,686 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 07:38:58" (1/1) ... [2020-10-25 19:38:58,707 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 07:38:58" (1/1) ... [2020-10-25 19:38:58,732 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-25 19:38:58,733 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-25 19:38:58,733 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-25 19:38:58,733 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-25 19:38:58,744 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 07:38:58" (1/1) ... [2020-10-25 19:38:58,744 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 07:38:58" (1/1) ... [2020-10-25 19:38:58,746 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 07:38:58" (1/1) ... [2020-10-25 19:38:58,746 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 07:38:58" (1/1) ... [2020-10-25 19:38:58,751 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 07:38:58" (1/1) ... [2020-10-25 19:38:58,757 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 07:38:58" (1/1) ... [2020-10-25 19:38:58,759 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 07:38:58" (1/1) ... [2020-10-25 19:38:58,761 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-25 19:38:58,763 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-25 19:38:58,763 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-25 19:38:58,763 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-25 19:38:58,764 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 07:38:58" (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 [2020-10-25 19:38:58,850 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-25 19:38:58,850 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-25 19:38:58,851 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-25 19:38:58,851 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-25 19:38:59,240 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-25 19:38:59,241 INFO L298 CfgBuilder]: Removed 7 assume(true) statements. [2020-10-25 19:38:59,243 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.10 07:38:59 BoogieIcfgContainer [2020-10-25 19:38:59,243 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-25 19:38:59,246 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-25 19:38:59,246 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-25 19:38:59,251 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-25 19:38:59,251 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.10 07:38:58" (1/3) ... [2020-10-25 19:38:59,253 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3536e9c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.10 07:38:59, skipping insertion in model container [2020-10-25 19:38:59,253 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 07:38:58" (2/3) ... [2020-10-25 19:38:59,254 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3536e9c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.10 07:38:59, skipping insertion in model container [2020-10-25 19:38:59,254 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.10 07:38:59" (3/3) ... [2020-10-25 19:38:59,256 INFO L111 eAbstractionObserver]: Analyzing ICFG test_locks_10.c [2020-10-25 19:38:59,270 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-25 19:38:59,278 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-25 19:38:59,295 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-25 19:38:59,328 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-25 19:38:59,329 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-25 19:38:59,329 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-25 19:38:59,329 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-25 19:38:59,330 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-25 19:38:59,330 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-25 19:38:59,330 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-25 19:38:59,331 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-25 19:38:59,349 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states. [2020-10-25 19:38:59,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-25 19:38:59,357 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 19:38:59,359 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 19:38:59,359 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 19:38:59,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 19:38:59,367 INFO L82 PathProgramCache]: Analyzing trace with hash 153349273, now seen corresponding path program 1 times [2020-10-25 19:38:59,380 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 19:38:59,381 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617345592] [2020-10-25 19:38:59,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 19:38:59,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 19:38:59,626 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 19:38:59,630 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617345592] [2020-10-25 19:38:59,631 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-25 19:38:59,631 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-25 19:38:59,633 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399945178] [2020-10-25 19:38:59,638 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-25 19:38:59,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 19:38:59,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-25 19:38:59,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-25 19:38:59,666 INFO L87 Difference]: Start difference. First operand 41 states. Second operand 3 states. [2020-10-25 19:38:59,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 19:38:59,771 INFO L93 Difference]: Finished difference Result 84 states and 146 transitions. [2020-10-25 19:38:59,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-25 19:38:59,774 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-10-25 19:38:59,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 19:38:59,799 INFO L225 Difference]: With dead ends: 84 [2020-10-25 19:38:59,800 INFO L226 Difference]: Without dead ends: 69 [2020-10-25 19:38:59,806 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 [2020-10-25 19:38:59,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-25 19:38:59,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 47. [2020-10-25 19:38:59,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-25 19:38:59,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 86 transitions. [2020-10-25 19:38:59,873 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 86 transitions. Word has length 17 [2020-10-25 19:38:59,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 19:38:59,874 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 86 transitions. [2020-10-25 19:38:59,875 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-25 19:38:59,876 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 86 transitions. [2020-10-25 19:38:59,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-25 19:38:59,879 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 19:38:59,879 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 19:38:59,879 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-25 19:38:59,880 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 19:38:59,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 19:38:59,883 INFO L82 PathProgramCache]: Analyzing trace with hash -433456741, now seen corresponding path program 1 times [2020-10-25 19:38:59,883 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 19:38:59,884 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752077932] [2020-10-25 19:38:59,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 19:38:59,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 19:38:59,991 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 19:38:59,992 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752077932] [2020-10-25 19:38:59,992 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-25 19:38:59,992 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-25 19:38:59,992 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542658879] [2020-10-25 19:38:59,994 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-25 19:38:59,994 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 19:38:59,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-25 19:38:59,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-25 19:38:59,995 INFO L87 Difference]: Start difference. First operand 47 states and 86 transitions. Second operand 3 states. [2020-10-25 19:39:00,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 19:39:00,031 INFO L93 Difference]: Finished difference Result 114 states and 209 transitions. [2020-10-25 19:39:00,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-25 19:39:00,032 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-10-25 19:39:00,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 19:39:00,034 INFO L225 Difference]: With dead ends: 114 [2020-10-25 19:39:00,034 INFO L226 Difference]: Without dead ends: 69 [2020-10-25 19:39:00,036 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 [2020-10-25 19:39:00,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-25 19:39:00,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 67. [2020-10-25 19:39:00,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-25 19:39:00,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 122 transitions. [2020-10-25 19:39:00,046 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 122 transitions. Word has length 17 [2020-10-25 19:39:00,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 19:39:00,046 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 122 transitions. [2020-10-25 19:39:00,047 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-25 19:39:00,047 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 122 transitions. [2020-10-25 19:39:00,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-25 19:39:00,048 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 19:39:00,048 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 19:39:00,048 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-25 19:39:00,048 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 19:39:00,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 19:39:00,049 INFO L82 PathProgramCache]: Analyzing trace with hash 459073515, now seen corresponding path program 1 times [2020-10-25 19:39:00,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 19:39:00,050 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274964388] [2020-10-25 19:39:00,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 19:39:00,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 19:39:00,134 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 19:39:00,134 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274964388] [2020-10-25 19:39:00,134 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-25 19:39:00,135 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-25 19:39:00,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098422203] [2020-10-25 19:39:00,136 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-25 19:39:00,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 19:39:00,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-25 19:39:00,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-25 19:39:00,137 INFO L87 Difference]: Start difference. First operand 67 states and 122 transitions. Second operand 3 states. [2020-10-25 19:39:00,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 19:39:00,178 INFO L93 Difference]: Finished difference Result 105 states and 186 transitions. [2020-10-25 19:39:00,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-25 19:39:00,179 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-10-25 19:39:00,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 19:39:00,180 INFO L225 Difference]: With dead ends: 105 [2020-10-25 19:39:00,180 INFO L226 Difference]: Without dead ends: 72 [2020-10-25 19:39:00,181 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 [2020-10-25 19:39:00,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-25 19:39:00,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 70. [2020-10-25 19:39:00,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-25 19:39:00,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 124 transitions. [2020-10-25 19:39:00,191 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 124 transitions. Word has length 18 [2020-10-25 19:39:00,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 19:39:00,192 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 124 transitions. [2020-10-25 19:39:00,192 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-25 19:39:00,192 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 124 transitions. [2020-10-25 19:39:00,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-25 19:39:00,193 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 19:39:00,193 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 19:39:00,194 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-25 19:39:00,194 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 19:39:00,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 19:39:00,195 INFO L82 PathProgramCache]: Analyzing trace with hash -552043735, now seen corresponding path program 1 times [2020-10-25 19:39:00,195 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 19:39:00,195 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069694402] [2020-10-25 19:39:00,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 19:39:00,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 19:39:00,249 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 19:39:00,250 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069694402] [2020-10-25 19:39:00,250 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-25 19:39:00,250 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-25 19:39:00,251 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105443749] [2020-10-25 19:39:00,251 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-25 19:39:00,251 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 19:39:00,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-25 19:39:00,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-25 19:39:00,253 INFO L87 Difference]: Start difference. First operand 70 states and 124 transitions. Second operand 3 states. [2020-10-25 19:39:00,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 19:39:00,286 INFO L93 Difference]: Finished difference Result 133 states and 237 transitions. [2020-10-25 19:39:00,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-25 19:39:00,287 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-10-25 19:39:00,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 19:39:00,289 INFO L225 Difference]: With dead ends: 133 [2020-10-25 19:39:00,289 INFO L226 Difference]: Without dead ends: 131 [2020-10-25 19:39:00,290 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 [2020-10-25 19:39:00,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-10-25 19:39:00,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 93. [2020-10-25 19:39:00,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-25 19:39:00,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 165 transitions. [2020-10-25 19:39:00,301 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 165 transitions. Word has length 18 [2020-10-25 19:39:00,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 19:39:00,301 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 165 transitions. [2020-10-25 19:39:00,301 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-25 19:39:00,301 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 165 transitions. [2020-10-25 19:39:00,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-25 19:39:00,303 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 19:39:00,303 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 19:39:00,303 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-25 19:39:00,303 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 19:39:00,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 19:39:00,304 INFO L82 PathProgramCache]: Analyzing trace with hash -1138849749, now seen corresponding path program 1 times [2020-10-25 19:39:00,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 19:39:00,304 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250849948] [2020-10-25 19:39:00,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 19:39:00,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 19:39:00,350 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 19:39:00,351 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250849948] [2020-10-25 19:39:00,351 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-25 19:39:00,351 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-25 19:39:00,351 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471653062] [2020-10-25 19:39:00,352 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-25 19:39:00,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 19:39:00,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-25 19:39:00,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-25 19:39:00,353 INFO L87 Difference]: Start difference. First operand 93 states and 165 transitions. Second operand 3 states. [2020-10-25 19:39:00,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 19:39:00,380 INFO L93 Difference]: Finished difference Result 221 states and 395 transitions. [2020-10-25 19:39:00,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-25 19:39:00,381 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-10-25 19:39:00,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 19:39:00,382 INFO L225 Difference]: With dead ends: 221 [2020-10-25 19:39:00,382 INFO L226 Difference]: Without dead ends: 133 [2020-10-25 19:39:00,383 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 [2020-10-25 19:39:00,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-10-25 19:39:00,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 131. [2020-10-25 19:39:00,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-10-25 19:39:00,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 231 transitions. [2020-10-25 19:39:00,397 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 231 transitions. Word has length 18 [2020-10-25 19:39:00,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 19:39:00,397 INFO L481 AbstractCegarLoop]: Abstraction has 131 states and 231 transitions. [2020-10-25 19:39:00,397 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-25 19:39:00,398 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 231 transitions. [2020-10-25 19:39:00,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-25 19:39:00,399 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 19:39:00,402 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 19:39:00,402 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-25 19:39:00,403 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 19:39:00,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 19:39:00,403 INFO L82 PathProgramCache]: Analyzing trace with hash 66727088, now seen corresponding path program 1 times [2020-10-25 19:39:00,404 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 19:39:00,404 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609536639] [2020-10-25 19:39:00,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 19:39:00,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 19:39:00,452 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 19:39:00,453 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609536639] [2020-10-25 19:39:00,453 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-25 19:39:00,453 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-25 19:39:00,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026950463] [2020-10-25 19:39:00,454 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-25 19:39:00,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 19:39:00,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-25 19:39:00,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-25 19:39:00,455 INFO L87 Difference]: Start difference. First operand 131 states and 231 transitions. Second operand 3 states. [2020-10-25 19:39:00,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 19:39:00,483 INFO L93 Difference]: Finished difference Result 198 states and 346 transitions. [2020-10-25 19:39:00,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-25 19:39:00,484 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-10-25 19:39:00,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 19:39:00,486 INFO L225 Difference]: With dead ends: 198 [2020-10-25 19:39:00,486 INFO L226 Difference]: Without dead ends: 135 [2020-10-25 19:39:00,487 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 [2020-10-25 19:39:00,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-10-25 19:39:00,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 133. [2020-10-25 19:39:00,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-10-25 19:39:00,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 231 transitions. [2020-10-25 19:39:00,497 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 231 transitions. Word has length 19 [2020-10-25 19:39:00,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 19:39:00,498 INFO L481 AbstractCegarLoop]: Abstraction has 133 states and 231 transitions. [2020-10-25 19:39:00,498 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-25 19:39:00,498 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 231 transitions. [2020-10-25 19:39:00,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-25 19:39:00,499 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 19:39:00,500 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 19:39:00,500 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-25 19:39:00,500 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 19:39:00,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 19:39:00,501 INFO L82 PathProgramCache]: Analyzing trace with hash -944390162, now seen corresponding path program 1 times [2020-10-25 19:39:00,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 19:39:00,502 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457521168] [2020-10-25 19:39:00,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 19:39:00,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 19:39:00,539 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 19:39:00,539 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457521168] [2020-10-25 19:39:00,540 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-25 19:39:00,540 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-25 19:39:00,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746208820] [2020-10-25 19:39:00,541 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-25 19:39:00,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 19:39:00,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-25 19:39:00,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-25 19:39:00,542 INFO L87 Difference]: Start difference. First operand 133 states and 231 transitions. Second operand 3 states. [2020-10-25 19:39:00,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 19:39:00,570 INFO L93 Difference]: Finished difference Result 381 states and 665 transitions. [2020-10-25 19:39:00,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-25 19:39:00,572 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-10-25 19:39:00,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 19:39:00,574 INFO L225 Difference]: With dead ends: 381 [2020-10-25 19:39:00,574 INFO L226 Difference]: Without dead ends: 255 [2020-10-25 19:39:00,575 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 [2020-10-25 19:39:00,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2020-10-25 19:39:00,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 253. [2020-10-25 19:39:00,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 253 states. [2020-10-25 19:39:00,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 435 transitions. [2020-10-25 19:39:00,591 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 435 transitions. Word has length 19 [2020-10-25 19:39:00,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 19:39:00,591 INFO L481 AbstractCegarLoop]: Abstraction has 253 states and 435 transitions. [2020-10-25 19:39:00,591 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-25 19:39:00,592 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 435 transitions. [2020-10-25 19:39:00,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-25 19:39:00,593 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 19:39:00,594 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 19:39:00,594 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-25 19:39:00,594 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 19:39:00,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 19:39:00,595 INFO L82 PathProgramCache]: Analyzing trace with hash -357584148, now seen corresponding path program 1 times [2020-10-25 19:39:00,595 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 19:39:00,596 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561815721] [2020-10-25 19:39:00,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 19:39:00,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 19:39:00,641 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 19:39:00,641 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561815721] [2020-10-25 19:39:00,642 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-25 19:39:00,642 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-25 19:39:00,642 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41005069] [2020-10-25 19:39:00,642 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-25 19:39:00,643 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 19:39:00,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-25 19:39:00,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-25 19:39:00,651 INFO L87 Difference]: Start difference. First operand 253 states and 435 transitions. Second operand 3 states. [2020-10-25 19:39:00,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 19:39:00,673 INFO L93 Difference]: Finished difference Result 321 states and 557 transitions. [2020-10-25 19:39:00,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-25 19:39:00,673 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-10-25 19:39:00,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 19:39:00,675 INFO L225 Difference]: With dead ends: 321 [2020-10-25 19:39:00,676 INFO L226 Difference]: Without dead ends: 319 [2020-10-25 19:39:00,676 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 [2020-10-25 19:39:00,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2020-10-25 19:39:00,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 253. [2020-10-25 19:39:00,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 253 states. [2020-10-25 19:39:00,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 431 transitions. [2020-10-25 19:39:00,690 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 431 transitions. Word has length 19 [2020-10-25 19:39:00,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 19:39:00,691 INFO L481 AbstractCegarLoop]: Abstraction has 253 states and 431 transitions. [2020-10-25 19:39:00,691 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-25 19:39:00,691 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 431 transitions. [2020-10-25 19:39:00,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-25 19:39:00,693 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 19:39:00,693 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 19:39:00,693 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-25 19:39:00,693 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 19:39:00,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 19:39:00,694 INFO L82 PathProgramCache]: Analyzing trace with hash 788890080, now seen corresponding path program 1 times [2020-10-25 19:39:00,694 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 19:39:00,694 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338331507] [2020-10-25 19:39:00,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 19:39:00,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 19:39:00,731 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 19:39:00,732 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338331507] [2020-10-25 19:39:00,732 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-25 19:39:00,732 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-25 19:39:00,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187725804] [2020-10-25 19:39:00,733 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-25 19:39:00,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 19:39:00,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-25 19:39:00,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-25 19:39:00,734 INFO L87 Difference]: Start difference. First operand 253 states and 431 transitions. Second operand 3 states. [2020-10-25 19:39:00,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 19:39:00,783 INFO L93 Difference]: Finished difference Result 469 states and 809 transitions. [2020-10-25 19:39:00,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-25 19:39:00,785 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-10-25 19:39:00,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 19:39:00,787 INFO L225 Difference]: With dead ends: 469 [2020-10-25 19:39:00,787 INFO L226 Difference]: Without dead ends: 467 [2020-10-25 19:39:00,788 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 [2020-10-25 19:39:00,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 467 states. [2020-10-25 19:39:00,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 467 to 353. [2020-10-25 19:39:00,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 353 states. [2020-10-25 19:39:00,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 591 transitions. [2020-10-25 19:39:00,818 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 591 transitions. Word has length 20 [2020-10-25 19:39:00,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 19:39:00,819 INFO L481 AbstractCegarLoop]: Abstraction has 353 states and 591 transitions. [2020-10-25 19:39:00,819 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-25 19:39:00,819 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 591 transitions. [2020-10-25 19:39:00,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-25 19:39:00,828 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 19:39:00,828 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 19:39:00,830 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-25 19:39:00,831 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 19:39:00,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 19:39:00,832 INFO L82 PathProgramCache]: Analyzing trace with hash 202084066, now seen corresponding path program 1 times [2020-10-25 19:39:00,832 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 19:39:00,832 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680361947] [2020-10-25 19:39:00,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 19:39:00,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 19:39:00,903 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 19:39:00,903 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680361947] [2020-10-25 19:39:00,904 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-25 19:39:00,904 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-25 19:39:00,906 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745169121] [2020-10-25 19:39:00,906 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-25 19:39:00,906 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 19:39:00,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-25 19:39:00,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-25 19:39:00,908 INFO L87 Difference]: Start difference. First operand 353 states and 591 transitions. Second operand 3 states. [2020-10-25 19:39:01,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 19:39:01,068 INFO L93 Difference]: Finished difference Result 837 states and 1409 transitions. [2020-10-25 19:39:01,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-25 19:39:01,074 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-10-25 19:39:01,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 19:39:01,078 INFO L225 Difference]: With dead ends: 837 [2020-10-25 19:39:01,078 INFO L226 Difference]: Without dead ends: 491 [2020-10-25 19:39:01,080 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 [2020-10-25 19:39:01,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 491 states. [2020-10-25 19:39:01,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 491 to 489. [2020-10-25 19:39:01,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 489 states. [2020-10-25 19:39:01,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 489 states to 489 states and 811 transitions. [2020-10-25 19:39:01,097 INFO L78 Accepts]: Start accepts. Automaton has 489 states and 811 transitions. Word has length 20 [2020-10-25 19:39:01,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 19:39:01,098 INFO L481 AbstractCegarLoop]: Abstraction has 489 states and 811 transitions. [2020-10-25 19:39:01,098 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-25 19:39:01,098 INFO L276 IsEmpty]: Start isEmpty. Operand 489 states and 811 transitions. [2020-10-25 19:39:01,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-25 19:39:01,100 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 19:39:01,100 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] [2020-10-25 19:39:01,100 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-25 19:39:01,100 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 19:39:01,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 19:39:01,101 INFO L82 PathProgramCache]: Analyzing trace with hash -1313996925, now seen corresponding path program 1 times [2020-10-25 19:39:01,102 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 19:39:01,102 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313133696] [2020-10-25 19:39:01,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 19:39:01,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 19:39:01,128 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 19:39:01,129 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313133696] [2020-10-25 19:39:01,129 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-25 19:39:01,129 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-25 19:39:01,130 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891303270] [2020-10-25 19:39:01,130 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-25 19:39:01,130 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 19:39:01,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-25 19:39:01,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-25 19:39:01,131 INFO L87 Difference]: Start difference. First operand 489 states and 811 transitions. Second operand 3 states. [2020-10-25 19:39:01,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 19:39:01,153 INFO L93 Difference]: Finished difference Result 741 states and 1225 transitions. [2020-10-25 19:39:01,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-25 19:39:01,154 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-10-25 19:39:01,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 19:39:01,157 INFO L225 Difference]: With dead ends: 741 [2020-10-25 19:39:01,157 INFO L226 Difference]: Without dead ends: 503 [2020-10-25 19:39:01,158 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 [2020-10-25 19:39:01,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 503 states. [2020-10-25 19:39:01,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 503 to 501. [2020-10-25 19:39:01,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 501 states. [2020-10-25 19:39:01,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 501 states to 501 states and 819 transitions. [2020-10-25 19:39:01,190 INFO L78 Accepts]: Start accepts. Automaton has 501 states and 819 transitions. Word has length 21 [2020-10-25 19:39:01,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 19:39:01,191 INFO L481 AbstractCegarLoop]: Abstraction has 501 states and 819 transitions. [2020-10-25 19:39:01,191 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-25 19:39:01,191 INFO L276 IsEmpty]: Start isEmpty. Operand 501 states and 819 transitions. [2020-10-25 19:39:01,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-25 19:39:01,203 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 19:39:01,203 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] [2020-10-25 19:39:01,203 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-25 19:39:01,203 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 19:39:01,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 19:39:01,205 INFO L82 PathProgramCache]: Analyzing trace with hash 1969853121, now seen corresponding path program 1 times [2020-10-25 19:39:01,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 19:39:01,207 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944691434] [2020-10-25 19:39:01,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 19:39:01,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 19:39:01,264 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 19:39:01,264 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944691434] [2020-10-25 19:39:01,265 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-25 19:39:01,265 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-25 19:39:01,265 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940919169] [2020-10-25 19:39:01,266 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-25 19:39:01,266 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 19:39:01,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-25 19:39:01,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-25 19:39:01,267 INFO L87 Difference]: Start difference. First operand 501 states and 819 transitions. Second operand 3 states. [2020-10-25 19:39:01,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 19:39:01,302 INFO L93 Difference]: Finished difference Result 905 states and 1501 transitions. [2020-10-25 19:39:01,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-25 19:39:01,303 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-10-25 19:39:01,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 19:39:01,308 INFO L225 Difference]: With dead ends: 905 [2020-10-25 19:39:01,308 INFO L226 Difference]: Without dead ends: 903 [2020-10-25 19:39:01,309 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 [2020-10-25 19:39:01,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 903 states. [2020-10-25 19:39:01,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 903 to 709. [2020-10-25 19:39:01,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 709 states. [2020-10-25 19:39:01,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 709 states to 709 states and 1131 transitions. [2020-10-25 19:39:01,336 INFO L78 Accepts]: Start accepts. Automaton has 709 states and 1131 transitions. Word has length 21 [2020-10-25 19:39:01,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 19:39:01,336 INFO L481 AbstractCegarLoop]: Abstraction has 709 states and 1131 transitions. [2020-10-25 19:39:01,337 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-25 19:39:01,337 INFO L276 IsEmpty]: Start isEmpty. Operand 709 states and 1131 transitions. [2020-10-25 19:39:01,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-25 19:39:01,338 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 19:39:01,338 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] [2020-10-25 19:39:01,338 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-25 19:39:01,339 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 19:39:01,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 19:39:01,339 INFO L82 PathProgramCache]: Analyzing trace with hash 1383047107, now seen corresponding path program 1 times [2020-10-25 19:39:01,339 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 19:39:01,340 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501292743] [2020-10-25 19:39:01,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 19:39:01,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 19:39:01,365 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 19:39:01,366 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501292743] [2020-10-25 19:39:01,366 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-25 19:39:01,366 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-25 19:39:01,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133480702] [2020-10-25 19:39:01,367 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-25 19:39:01,367 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 19:39:01,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-25 19:39:01,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-25 19:39:01,368 INFO L87 Difference]: Start difference. First operand 709 states and 1131 transitions. Second operand 3 states. [2020-10-25 19:39:01,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 19:39:01,412 INFO L93 Difference]: Finished difference Result 1657 states and 2653 transitions. [2020-10-25 19:39:01,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-25 19:39:01,413 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-10-25 19:39:01,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 19:39:01,418 INFO L225 Difference]: With dead ends: 1657 [2020-10-25 19:39:01,418 INFO L226 Difference]: Without dead ends: 967 [2020-10-25 19:39:01,421 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 [2020-10-25 19:39:01,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 967 states. [2020-10-25 19:39:01,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 967 to 965. [2020-10-25 19:39:01,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 965 states. [2020-10-25 19:39:01,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 965 states to 965 states and 1523 transitions. [2020-10-25 19:39:01,452 INFO L78 Accepts]: Start accepts. Automaton has 965 states and 1523 transitions. Word has length 21 [2020-10-25 19:39:01,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 19:39:01,452 INFO L481 AbstractCegarLoop]: Abstraction has 965 states and 1523 transitions. [2020-10-25 19:39:01,452 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-25 19:39:01,453 INFO L276 IsEmpty]: Start isEmpty. Operand 965 states and 1523 transitions. [2020-10-25 19:39:01,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-25 19:39:01,454 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 19:39:01,454 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] [2020-10-25 19:39:01,455 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-25 19:39:01,455 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 19:39:01,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 19:39:01,455 INFO L82 PathProgramCache]: Analyzing trace with hash 936119319, now seen corresponding path program 1 times [2020-10-25 19:39:01,456 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 19:39:01,456 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909349377] [2020-10-25 19:39:01,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 19:39:01,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 19:39:01,490 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 19:39:01,490 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909349377] [2020-10-25 19:39:01,490 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-25 19:39:01,491 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-25 19:39:01,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955989118] [2020-10-25 19:39:01,492 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-25 19:39:01,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 19:39:01,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-25 19:39:01,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-25 19:39:01,493 INFO L87 Difference]: Start difference. First operand 965 states and 1523 transitions. Second operand 3 states. [2020-10-25 19:39:01,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 19:39:01,525 INFO L93 Difference]: Finished difference Result 1449 states and 2277 transitions. [2020-10-25 19:39:01,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-25 19:39:01,526 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-10-25 19:39:01,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 19:39:01,531 INFO L225 Difference]: With dead ends: 1449 [2020-10-25 19:39:01,531 INFO L226 Difference]: Without dead ends: 983 [2020-10-25 19:39:01,532 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 [2020-10-25 19:39:01,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 983 states. [2020-10-25 19:39:01,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 983 to 981. [2020-10-25 19:39:01,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 981 states. [2020-10-25 19:39:01,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 981 states to 981 states and 1523 transitions. [2020-10-25 19:39:01,563 INFO L78 Accepts]: Start accepts. Automaton has 981 states and 1523 transitions. Word has length 22 [2020-10-25 19:39:01,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 19:39:01,563 INFO L481 AbstractCegarLoop]: Abstraction has 981 states and 1523 transitions. [2020-10-25 19:39:01,564 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-25 19:39:01,564 INFO L276 IsEmpty]: Start isEmpty. Operand 981 states and 1523 transitions. [2020-10-25 19:39:01,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-25 19:39:01,565 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 19:39:01,565 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] [2020-10-25 19:39:01,565 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-25 19:39:01,566 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 19:39:01,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 19:39:01,566 INFO L82 PathProgramCache]: Analyzing trace with hash -74997931, now seen corresponding path program 1 times [2020-10-25 19:39:01,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 19:39:01,567 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749445767] [2020-10-25 19:39:01,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 19:39:01,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 19:39:01,600 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 19:39:01,600 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749445767] [2020-10-25 19:39:01,600 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-25 19:39:01,600 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-25 19:39:01,600 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718050467] [2020-10-25 19:39:01,601 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-25 19:39:01,601 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 19:39:01,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-25 19:39:01,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-25 19:39:01,602 INFO L87 Difference]: Start difference. First operand 981 states and 1523 transitions. Second operand 3 states. [2020-10-25 19:39:01,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 19:39:01,635 INFO L93 Difference]: Finished difference Result 1737 states and 2741 transitions. [2020-10-25 19:39:01,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-25 19:39:01,636 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-10-25 19:39:01,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 19:39:01,646 INFO L225 Difference]: With dead ends: 1737 [2020-10-25 19:39:01,646 INFO L226 Difference]: Without dead ends: 1735 [2020-10-25 19:39:01,647 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 [2020-10-25 19:39:01,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1735 states. [2020-10-25 19:39:01,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1735 to 1413. [2020-10-25 19:39:01,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1413 states. [2020-10-25 19:39:01,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1413 states to 1413 states and 2131 transitions. [2020-10-25 19:39:01,689 INFO L78 Accepts]: Start accepts. Automaton has 1413 states and 2131 transitions. Word has length 22 [2020-10-25 19:39:01,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 19:39:01,690 INFO L481 AbstractCegarLoop]: Abstraction has 1413 states and 2131 transitions. [2020-10-25 19:39:01,690 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-25 19:39:01,690 INFO L276 IsEmpty]: Start isEmpty. Operand 1413 states and 2131 transitions. [2020-10-25 19:39:01,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-25 19:39:01,692 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 19:39:01,692 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] [2020-10-25 19:39:01,693 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-25 19:39:01,693 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 19:39:01,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 19:39:01,693 INFO L82 PathProgramCache]: Analyzing trace with hash -661803945, now seen corresponding path program 1 times [2020-10-25 19:39:01,694 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 19:39:01,694 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588242941] [2020-10-25 19:39:01,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 19:39:01,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 19:39:01,714 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 19:39:01,714 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588242941] [2020-10-25 19:39:01,714 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-25 19:39:01,714 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-25 19:39:01,715 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913509266] [2020-10-25 19:39:01,715 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-25 19:39:01,715 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 19:39:01,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-25 19:39:01,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-25 19:39:01,716 INFO L87 Difference]: Start difference. First operand 1413 states and 2131 transitions. Second operand 3 states. [2020-10-25 19:39:01,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 19:39:01,770 INFO L93 Difference]: Finished difference Result 3273 states and 4949 transitions. [2020-10-25 19:39:01,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-25 19:39:01,770 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-10-25 19:39:01,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 19:39:01,780 INFO L225 Difference]: With dead ends: 3273 [2020-10-25 19:39:01,780 INFO L226 Difference]: Without dead ends: 1895 [2020-10-25 19:39:01,782 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 [2020-10-25 19:39:01,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1895 states. [2020-10-25 19:39:01,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1895 to 1893. [2020-10-25 19:39:01,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1893 states. [2020-10-25 19:39:01,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1893 states to 1893 states and 2819 transitions. [2020-10-25 19:39:01,860 INFO L78 Accepts]: Start accepts. Automaton has 1893 states and 2819 transitions. Word has length 22 [2020-10-25 19:39:01,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 19:39:01,860 INFO L481 AbstractCegarLoop]: Abstraction has 1893 states and 2819 transitions. [2020-10-25 19:39:01,860 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-25 19:39:01,861 INFO L276 IsEmpty]: Start isEmpty. Operand 1893 states and 2819 transitions. [2020-10-25 19:39:01,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-25 19:39:01,865 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 19:39:01,865 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] [2020-10-25 19:39:01,865 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-25 19:39:01,865 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 19:39:01,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 19:39:01,866 INFO L82 PathProgramCache]: Analyzing trace with hash 1970246488, now seen corresponding path program 1 times [2020-10-25 19:39:01,866 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 19:39:01,867 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605522088] [2020-10-25 19:39:01,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 19:39:01,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 19:39:01,912 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 19:39:01,912 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605522088] [2020-10-25 19:39:01,912 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-25 19:39:01,913 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-25 19:39:01,913 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121007334] [2020-10-25 19:39:01,913 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-25 19:39:01,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 19:39:01,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-25 19:39:01,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-25 19:39:01,914 INFO L87 Difference]: Start difference. First operand 1893 states and 2819 transitions. Second operand 3 states. [2020-10-25 19:39:01,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 19:39:01,960 INFO L93 Difference]: Finished difference Result 2841 states and 4213 transitions. [2020-10-25 19:39:01,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-25 19:39:01,961 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-10-25 19:39:01,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 19:39:01,971 INFO L225 Difference]: With dead ends: 2841 [2020-10-25 19:39:01,972 INFO L226 Difference]: Without dead ends: 1927 [2020-10-25 19:39:01,974 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 [2020-10-25 19:39:01,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1927 states. [2020-10-25 19:39:02,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1927 to 1925. [2020-10-25 19:39:02,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1925 states. [2020-10-25 19:39:02,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1925 states to 1925 states and 2819 transitions. [2020-10-25 19:39:02,035 INFO L78 Accepts]: Start accepts. Automaton has 1925 states and 2819 transitions. Word has length 23 [2020-10-25 19:39:02,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 19:39:02,036 INFO L481 AbstractCegarLoop]: Abstraction has 1925 states and 2819 transitions. [2020-10-25 19:39:02,036 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-25 19:39:02,036 INFO L276 IsEmpty]: Start isEmpty. Operand 1925 states and 2819 transitions. [2020-10-25 19:39:02,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-25 19:39:02,039 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 19:39:02,039 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] [2020-10-25 19:39:02,039 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-25 19:39:02,039 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 19:39:02,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 19:39:02,040 INFO L82 PathProgramCache]: Analyzing trace with hash 959129238, now seen corresponding path program 1 times [2020-10-25 19:39:02,040 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 19:39:02,040 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909851284] [2020-10-25 19:39:02,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 19:39:02,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 19:39:02,061 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 19:39:02,061 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909851284] [2020-10-25 19:39:02,061 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-25 19:39:02,062 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-25 19:39:02,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221578737] [2020-10-25 19:39:02,072 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-25 19:39:02,072 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 19:39:02,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-25 19:39:02,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-25 19:39:02,073 INFO L87 Difference]: Start difference. First operand 1925 states and 2819 transitions. Second operand 3 states. [2020-10-25 19:39:02,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 19:39:02,136 INFO L93 Difference]: Finished difference Result 3337 states and 4965 transitions. [2020-10-25 19:39:02,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-25 19:39:02,137 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-10-25 19:39:02,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 19:39:02,174 INFO L225 Difference]: With dead ends: 3337 [2020-10-25 19:39:02,175 INFO L226 Difference]: Without dead ends: 3335 [2020-10-25 19:39:02,177 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 [2020-10-25 19:39:02,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3335 states. [2020-10-25 19:39:02,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3335 to 2821. [2020-10-25 19:39:02,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2821 states. [2020-10-25 19:39:02,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2821 states to 2821 states and 4003 transitions. [2020-10-25 19:39:02,298 INFO L78 Accepts]: Start accepts. Automaton has 2821 states and 4003 transitions. Word has length 23 [2020-10-25 19:39:02,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 19:39:02,299 INFO L481 AbstractCegarLoop]: Abstraction has 2821 states and 4003 transitions. [2020-10-25 19:39:02,299 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-25 19:39:02,299 INFO L276 IsEmpty]: Start isEmpty. Operand 2821 states and 4003 transitions. [2020-10-25 19:39:02,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-25 19:39:02,304 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 19:39:02,304 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] [2020-10-25 19:39:02,305 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-25 19:39:02,305 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 19:39:02,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 19:39:02,306 INFO L82 PathProgramCache]: Analyzing trace with hash 372323224, now seen corresponding path program 1 times [2020-10-25 19:39:02,306 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 19:39:02,308 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540205605] [2020-10-25 19:39:02,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 19:39:02,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 19:39:02,347 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 19:39:02,348 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540205605] [2020-10-25 19:39:02,348 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-25 19:39:02,348 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-25 19:39:02,348 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591455202] [2020-10-25 19:39:02,349 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-25 19:39:02,349 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 19:39:02,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-25 19:39:02,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-25 19:39:02,350 INFO L87 Difference]: Start difference. First operand 2821 states and 4003 transitions. Second operand 3 states. [2020-10-25 19:39:02,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 19:39:02,452 INFO L93 Difference]: Finished difference Result 6473 states and 9189 transitions. [2020-10-25 19:39:02,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-25 19:39:02,453 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-10-25 19:39:02,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 19:39:02,471 INFO L225 Difference]: With dead ends: 6473 [2020-10-25 19:39:02,472 INFO L226 Difference]: Without dead ends: 3719 [2020-10-25 19:39:02,477 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 [2020-10-25 19:39:02,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3719 states. [2020-10-25 19:39:02,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3719 to 3717. [2020-10-25 19:39:02,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3717 states. [2020-10-25 19:39:02,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3717 states to 3717 states and 5187 transitions. [2020-10-25 19:39:02,626 INFO L78 Accepts]: Start accepts. Automaton has 3717 states and 5187 transitions. Word has length 23 [2020-10-25 19:39:02,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 19:39:02,627 INFO L481 AbstractCegarLoop]: Abstraction has 3717 states and 5187 transitions. [2020-10-25 19:39:02,627 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-25 19:39:02,627 INFO L276 IsEmpty]: Start isEmpty. Operand 3717 states and 5187 transitions. [2020-10-25 19:39:02,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-25 19:39:02,634 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 19:39:02,635 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] [2020-10-25 19:39:02,635 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-25 19:39:02,635 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 19:39:02,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 19:39:02,636 INFO L82 PathProgramCache]: Analyzing trace with hash -331549300, now seen corresponding path program 1 times [2020-10-25 19:39:02,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 19:39:02,637 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773963989] [2020-10-25 19:39:02,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 19:39:02,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 19:39:02,679 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 19:39:02,680 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773963989] [2020-10-25 19:39:02,680 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-25 19:39:02,680 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-25 19:39:02,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474567590] [2020-10-25 19:39:02,681 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-25 19:39:02,681 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 19:39:02,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-25 19:39:02,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-25 19:39:02,682 INFO L87 Difference]: Start difference. First operand 3717 states and 5187 transitions. Second operand 3 states. [2020-10-25 19:39:02,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 19:39:02,760 INFO L93 Difference]: Finished difference Result 5577 states and 7749 transitions. [2020-10-25 19:39:02,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-25 19:39:02,761 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-10-25 19:39:02,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 19:39:02,779 INFO L225 Difference]: With dead ends: 5577 [2020-10-25 19:39:02,779 INFO L226 Difference]: Without dead ends: 3783 [2020-10-25 19:39:02,783 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 [2020-10-25 19:39:02,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3783 states. [2020-10-25 19:39:02,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3783 to 3781. [2020-10-25 19:39:02,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3781 states. [2020-10-25 19:39:02,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3781 states to 3781 states and 5187 transitions. [2020-10-25 19:39:02,915 INFO L78 Accepts]: Start accepts. Automaton has 3781 states and 5187 transitions. Word has length 24 [2020-10-25 19:39:02,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 19:39:02,916 INFO L481 AbstractCegarLoop]: Abstraction has 3781 states and 5187 transitions. [2020-10-25 19:39:02,916 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-25 19:39:02,916 INFO L276 IsEmpty]: Start isEmpty. Operand 3781 states and 5187 transitions. [2020-10-25 19:39:02,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-25 19:39:02,923 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 19:39:02,923 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] [2020-10-25 19:39:02,925 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-25 19:39:02,925 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 19:39:02,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 19:39:02,926 INFO L82 PathProgramCache]: Analyzing trace with hash -1342666550, now seen corresponding path program 1 times [2020-10-25 19:39:02,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 19:39:02,926 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084199780] [2020-10-25 19:39:02,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 19:39:02,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 19:39:02,973 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 19:39:02,973 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084199780] [2020-10-25 19:39:02,973 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-25 19:39:02,973 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-25 19:39:02,974 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570187802] [2020-10-25 19:39:02,976 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-25 19:39:02,976 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 19:39:02,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-25 19:39:02,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-25 19:39:02,977 INFO L87 Difference]: Start difference. First operand 3781 states and 5187 transitions. Second operand 3 states. [2020-10-25 19:39:03,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 19:39:03,090 INFO L93 Difference]: Finished difference Result 6409 states and 8901 transitions. [2020-10-25 19:39:03,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-25 19:39:03,090 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-10-25 19:39:03,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 19:39:03,139 INFO L225 Difference]: With dead ends: 6409 [2020-10-25 19:39:03,140 INFO L226 Difference]: Without dead ends: 6407 [2020-10-25 19:39:03,143 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 [2020-10-25 19:39:03,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6407 states. [2020-10-25 19:39:03,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6407 to 5637. [2020-10-25 19:39:03,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5637 states. [2020-10-25 19:39:03,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5637 states to 5637 states and 7491 transitions. [2020-10-25 19:39:03,387 INFO L78 Accepts]: Start accepts. Automaton has 5637 states and 7491 transitions. Word has length 24 [2020-10-25 19:39:03,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 19:39:03,387 INFO L481 AbstractCegarLoop]: Abstraction has 5637 states and 7491 transitions. [2020-10-25 19:39:03,387 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-25 19:39:03,388 INFO L276 IsEmpty]: Start isEmpty. Operand 5637 states and 7491 transitions. [2020-10-25 19:39:03,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-25 19:39:03,398 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 19:39:03,398 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] [2020-10-25 19:39:03,398 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-25 19:39:03,398 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 19:39:03,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 19:39:03,399 INFO L82 PathProgramCache]: Analyzing trace with hash -1929472564, now seen corresponding path program 1 times [2020-10-25 19:39:03,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 19:39:03,401 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404004064] [2020-10-25 19:39:03,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 19:39:03,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 19:39:03,445 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 19:39:03,447 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404004064] [2020-10-25 19:39:03,448 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-25 19:39:03,448 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-25 19:39:03,448 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413309124] [2020-10-25 19:39:03,448 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-25 19:39:03,449 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 19:39:03,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-25 19:39:03,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-25 19:39:03,451 INFO L87 Difference]: Start difference. First operand 5637 states and 7491 transitions. Second operand 3 states. [2020-10-25 19:39:03,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 19:39:03,612 INFO L93 Difference]: Finished difference Result 12809 states and 16965 transitions. [2020-10-25 19:39:03,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-25 19:39:03,613 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-10-25 19:39:03,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 19:39:03,631 INFO L225 Difference]: With dead ends: 12809 [2020-10-25 19:39:03,631 INFO L226 Difference]: Without dead ends: 7303 [2020-10-25 19:39:03,641 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 [2020-10-25 19:39:03,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7303 states. [2020-10-25 19:39:03,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7303 to 7301. [2020-10-25 19:39:03,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7301 states. [2020-10-25 19:39:03,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7301 states to 7301 states and 9475 transitions. [2020-10-25 19:39:03,900 INFO L78 Accepts]: Start accepts. Automaton has 7301 states and 9475 transitions. Word has length 24 [2020-10-25 19:39:03,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 19:39:03,901 INFO L481 AbstractCegarLoop]: Abstraction has 7301 states and 9475 transitions. [2020-10-25 19:39:03,901 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-25 19:39:03,901 INFO L276 IsEmpty]: Start isEmpty. Operand 7301 states and 9475 transitions. [2020-10-25 19:39:03,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-25 19:39:03,910 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 19:39:03,911 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 19:39:03,911 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-25 19:39:03,911 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 19:39:03,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 19:39:03,912 INFO L82 PathProgramCache]: Analyzing trace with hash 1327225645, now seen corresponding path program 1 times [2020-10-25 19:39:03,912 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 19:39:03,915 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933476857] [2020-10-25 19:39:03,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 19:39:03,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 19:39:03,955 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 19:39:03,955 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933476857] [2020-10-25 19:39:03,955 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-25 19:39:03,955 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-25 19:39:03,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565482688] [2020-10-25 19:39:03,956 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-25 19:39:03,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 19:39:03,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-25 19:39:03,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-25 19:39:03,960 INFO L87 Difference]: Start difference. First operand 7301 states and 9475 transitions. Second operand 3 states. [2020-10-25 19:39:04,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 19:39:04,178 INFO L93 Difference]: Finished difference Result 10953 states and 14149 transitions. [2020-10-25 19:39:04,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-25 19:39:04,178 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-10-25 19:39:04,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 19:39:04,192 INFO L225 Difference]: With dead ends: 10953 [2020-10-25 19:39:04,193 INFO L226 Difference]: Without dead ends: 7431 [2020-10-25 19:39:04,199 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 [2020-10-25 19:39:04,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7431 states. [2020-10-25 19:39:04,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7431 to 7429. [2020-10-25 19:39:04,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7429 states. [2020-10-25 19:39:04,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7429 states to 7429 states and 9475 transitions. [2020-10-25 19:39:04,437 INFO L78 Accepts]: Start accepts. Automaton has 7429 states and 9475 transitions. Word has length 25 [2020-10-25 19:39:04,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 19:39:04,437 INFO L481 AbstractCegarLoop]: Abstraction has 7429 states and 9475 transitions. [2020-10-25 19:39:04,437 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-25 19:39:04,437 INFO L276 IsEmpty]: Start isEmpty. Operand 7429 states and 9475 transitions. [2020-10-25 19:39:04,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-25 19:39:04,446 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 19:39:04,446 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] [2020-10-25 19:39:04,446 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-25 19:39:04,447 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 19:39:04,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 19:39:04,447 INFO L82 PathProgramCache]: Analyzing trace with hash 316108395, now seen corresponding path program 1 times [2020-10-25 19:39:04,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 19:39:04,447 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666526462] [2020-10-25 19:39:04,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 19:39:04,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 19:39:04,466 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 19:39:04,466 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666526462] [2020-10-25 19:39:04,466 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-25 19:39:04,466 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-25 19:39:04,467 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174695600] [2020-10-25 19:39:04,467 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-25 19:39:04,467 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 19:39:04,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-25 19:39:04,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-25 19:39:04,468 INFO L87 Difference]: Start difference. First operand 7429 states and 9475 transitions. Second operand 3 states. [2020-10-25 19:39:04,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 19:39:04,682 INFO L93 Difference]: Finished difference Result 12297 states and 15749 transitions. [2020-10-25 19:39:04,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-25 19:39:04,683 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-10-25 19:39:04,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 19:39:04,707 INFO L225 Difference]: With dead ends: 12297 [2020-10-25 19:39:04,707 INFO L226 Difference]: Without dead ends: 12295 [2020-10-25 19:39:04,711 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 [2020-10-25 19:39:04,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12295 states. [2020-10-25 19:39:05,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12295 to 11269. [2020-10-25 19:39:05,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11269 states. [2020-10-25 19:39:05,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11269 states to 11269 states and 13955 transitions. [2020-10-25 19:39:05,037 INFO L78 Accepts]: Start accepts. Automaton has 11269 states and 13955 transitions. Word has length 25 [2020-10-25 19:39:05,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 19:39:05,037 INFO L481 AbstractCegarLoop]: Abstraction has 11269 states and 13955 transitions. [2020-10-25 19:39:05,038 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-25 19:39:05,038 INFO L276 IsEmpty]: Start isEmpty. Operand 11269 states and 13955 transitions. [2020-10-25 19:39:05,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-25 19:39:05,057 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 19:39:05,057 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] [2020-10-25 19:39:05,057 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-25 19:39:05,057 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 19:39:05,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 19:39:05,058 INFO L82 PathProgramCache]: Analyzing trace with hash -270697619, now seen corresponding path program 1 times [2020-10-25 19:39:05,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 19:39:05,059 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983694613] [2020-10-25 19:39:05,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 19:39:05,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 19:39:05,084 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 19:39:05,085 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983694613] [2020-10-25 19:39:05,085 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-25 19:39:05,085 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-25 19:39:05,085 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926359819] [2020-10-25 19:39:05,086 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-25 19:39:05,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 19:39:05,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-25 19:39:05,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-25 19:39:05,087 INFO L87 Difference]: Start difference. First operand 11269 states and 13955 transitions. Second operand 3 states. [2020-10-25 19:39:05,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 19:39:05,372 INFO L93 Difference]: Finished difference Result 25353 states and 31109 transitions. [2020-10-25 19:39:05,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-25 19:39:05,373 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-10-25 19:39:05,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 19:39:05,401 INFO L225 Difference]: With dead ends: 25353 [2020-10-25 19:39:05,402 INFO L226 Difference]: Without dead ends: 14343 [2020-10-25 19:39:05,416 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 [2020-10-25 19:39:05,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14343 states. [2020-10-25 19:39:05,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14343 to 14341. [2020-10-25 19:39:05,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14341 states. [2020-10-25 19:39:05,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14341 states to 14341 states and 17155 transitions. [2020-10-25 19:39:05,825 INFO L78 Accepts]: Start accepts. Automaton has 14341 states and 17155 transitions. Word has length 25 [2020-10-25 19:39:05,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 19:39:05,825 INFO L481 AbstractCegarLoop]: Abstraction has 14341 states and 17155 transitions. [2020-10-25 19:39:05,825 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-25 19:39:05,825 INFO L276 IsEmpty]: Start isEmpty. Operand 14341 states and 17155 transitions. [2020-10-25 19:39:05,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-25 19:39:05,845 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 19:39:05,845 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] [2020-10-25 19:39:05,845 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-25 19:39:05,846 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 19:39:05,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 19:39:05,846 INFO L82 PathProgramCache]: Analyzing trace with hash 1209641729, now seen corresponding path program 1 times [2020-10-25 19:39:05,846 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 19:39:05,847 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763673254] [2020-10-25 19:39:05,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 19:39:05,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 19:39:05,902 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 19:39:05,903 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763673254] [2020-10-25 19:39:05,903 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-25 19:39:05,903 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-25 19:39:05,903 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556016779] [2020-10-25 19:39:05,904 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-25 19:39:05,904 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 19:39:05,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-25 19:39:05,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-25 19:39:05,905 INFO L87 Difference]: Start difference. First operand 14341 states and 17155 transitions. Second operand 3 states. [2020-10-25 19:39:06,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 19:39:06,173 INFO L93 Difference]: Finished difference Result 21513 states and 25605 transitions. [2020-10-25 19:39:06,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-25 19:39:06,174 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-10-25 19:39:06,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 19:39:06,205 INFO L225 Difference]: With dead ends: 21513 [2020-10-25 19:39:06,206 INFO L226 Difference]: Without dead ends: 14599 [2020-10-25 19:39:06,219 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 [2020-10-25 19:39:06,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14599 states. [2020-10-25 19:39:06,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14599 to 14597. [2020-10-25 19:39:06,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14597 states. [2020-10-25 19:39:06,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14597 states to 14597 states and 17155 transitions. [2020-10-25 19:39:06,703 INFO L78 Accepts]: Start accepts. Automaton has 14597 states and 17155 transitions. Word has length 26 [2020-10-25 19:39:06,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 19:39:06,703 INFO L481 AbstractCegarLoop]: Abstraction has 14597 states and 17155 transitions. [2020-10-25 19:39:06,703 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-25 19:39:06,704 INFO L276 IsEmpty]: Start isEmpty. Operand 14597 states and 17155 transitions. [2020-10-25 19:39:06,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-25 19:39:06,720 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 19:39:06,720 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] [2020-10-25 19:39:06,720 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-25 19:39:06,722 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 19:39:06,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 19:39:06,722 INFO L82 PathProgramCache]: Analyzing trace with hash 198524479, now seen corresponding path program 1 times [2020-10-25 19:39:06,723 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 19:39:06,723 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103466591] [2020-10-25 19:39:06,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 19:39:06,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 19:39:06,743 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 19:39:06,743 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103466591] [2020-10-25 19:39:06,744 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-25 19:39:06,744 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-25 19:39:06,744 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990483857] [2020-10-25 19:39:06,744 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-25 19:39:06,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 19:39:06,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-25 19:39:06,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-25 19:39:06,745 INFO L87 Difference]: Start difference. First operand 14597 states and 17155 transitions. Second operand 3 states. [2020-10-25 19:39:07,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 19:39:07,040 INFO L93 Difference]: Finished difference Result 23559 states and 27396 transitions. [2020-10-25 19:39:07,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-25 19:39:07,041 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-10-25 19:39:07,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 19:39:07,085 INFO L225 Difference]: With dead ends: 23559 [2020-10-25 19:39:07,085 INFO L226 Difference]: Without dead ends: 23557 [2020-10-25 19:39:07,095 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-25 19:39:07,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23557 states. [2020-10-25 19:39:07,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23557 to 22533. [2020-10-25 19:39:07,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22533 states. [2020-10-25 19:39:07,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22533 states to 22533 states and 25859 transitions. [2020-10-25 19:39:07,657 INFO L78 Accepts]: Start accepts. Automaton has 22533 states and 25859 transitions. Word has length 26 [2020-10-25 19:39:07,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 19:39:07,658 INFO L481 AbstractCegarLoop]: Abstraction has 22533 states and 25859 transitions. [2020-10-25 19:39:07,658 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-25 19:39:07,658 INFO L276 IsEmpty]: Start isEmpty. Operand 22533 states and 25859 transitions. [2020-10-25 19:39:07,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-25 19:39:07,695 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 19:39:07,696 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] [2020-10-25 19:39:07,696 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-25 19:39:07,696 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 19:39:07,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 19:39:07,697 INFO L82 PathProgramCache]: Analyzing trace with hash -388281535, now seen corresponding path program 1 times [2020-10-25 19:39:07,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 19:39:07,697 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112176349] [2020-10-25 19:39:07,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 19:39:07,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 19:39:07,727 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 19:39:07,727 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112176349] [2020-10-25 19:39:07,727 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-25 19:39:07,728 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-25 19:39:07,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520686993] [2020-10-25 19:39:07,728 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-25 19:39:07,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 19:39:07,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-25 19:39:07,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-25 19:39:07,729 INFO L87 Difference]: Start difference. First operand 22533 states and 25859 transitions. Second operand 3 states. [2020-10-25 19:39:08,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 19:39:08,107 INFO L93 Difference]: Finished difference Result 50181 states and 56579 transitions. [2020-10-25 19:39:08,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-25 19:39:08,108 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-10-25 19:39:08,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 19:39:08,108 INFO L225 Difference]: With dead ends: 50181 [2020-10-25 19:39:08,108 INFO L226 Difference]: Without dead ends: 0 [2020-10-25 19:39:08,151 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 [2020-10-25 19:39:08,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-25 19:39:08,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-25 19:39:08,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-25 19:39:08,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-25 19:39:08,152 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 26 [2020-10-25 19:39:08,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 19:39:08,153 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-25 19:39:08,153 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-25 19:39:08,153 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-25 19:39:08,153 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-25 19:39:08,153 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-25 19:39:08,156 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-10-25 19:39:08,176 INFO L274 CegarLoopResult]: For program point L126(line 126) no Hoare annotation was computed. [2020-10-25 19:39:08,176 INFO L274 CegarLoopResult]: For program point L151(line 151) no Hoare annotation was computed. [2020-10-25 19:39:08,176 INFO L274 CegarLoopResult]: For program point L110-1(lines 41 160) no Hoare annotation was computed. [2020-10-25 19:39:08,176 INFO L274 CegarLoopResult]: For program point L135-1(lines 41 160) no Hoare annotation was computed. [2020-10-25 19:39:08,176 INFO L274 CegarLoopResult]: For program point L3(line 3) no Hoare annotation was computed. [2020-10-25 19:39:08,176 INFO L274 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-10-25 19:39:08,176 INFO L274 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-10-25 19:39:08,177 INFO L274 CegarLoopResult]: For program point L111(line 111) no Hoare annotation was computed. [2020-10-25 19:39:08,177 INFO L274 CegarLoopResult]: For program point L136(line 136) no Hoare annotation was computed. [2020-10-25 19:39:08,177 INFO L277 CegarLoopResult]: At program point L161(lines 7 165) the Hoare annotation is: true [2020-10-25 19:39:08,177 INFO L274 CegarLoopResult]: For program point L120-1(lines 41 160) no Hoare annotation was computed. [2020-10-25 19:39:08,177 INFO L274 CegarLoopResult]: For program point L145-1(lines 41 160) no Hoare annotation was computed. [2020-10-25 19:39:08,177 INFO L274 CegarLoopResult]: For program point L104-1(lines 41 160) no Hoare annotation was computed. [2020-10-25 19:39:08,177 INFO L274 CegarLoopResult]: For program point L96-1(lines 41 160) no Hoare annotation was computed. [2020-10-25 19:39:08,177 INFO L274 CegarLoopResult]: For program point L121(line 121) no Hoare annotation was computed. [2020-10-25 19:39:08,177 INFO L274 CegarLoopResult]: For program point L88-1(lines 41 160) no Hoare annotation was computed. [2020-10-25 19:39:08,177 INFO L274 CegarLoopResult]: For program point L146(line 146) no Hoare annotation was computed. [2020-10-25 19:39:08,178 INFO L274 CegarLoopResult]: For program point L80-1(lines 41 160) no Hoare annotation was computed. [2020-10-25 19:39:08,178 INFO L274 CegarLoopResult]: For program point L72-1(lines 41 160) no Hoare annotation was computed. [2020-10-25 19:39:08,178 INFO L274 CegarLoopResult]: For program point L130-1(lines 41 160) no Hoare annotation was computed. [2020-10-25 19:39:08,178 INFO L277 CegarLoopResult]: At program point L155-1(lines 41 160) the Hoare annotation is: true [2020-10-25 19:39:08,178 INFO L277 CegarLoopResult]: At program point L164(lines 6 165) the Hoare annotation is: true [2020-10-25 19:39:08,180 INFO L274 CegarLoopResult]: For program point L131(line 131) no Hoare annotation was computed. [2020-10-25 19:39:08,180 INFO L274 CegarLoopResult]: For program point L-1(line -1) no Hoare annotation was computed. [2020-10-25 19:39:08,180 INFO L274 CegarLoopResult]: For program point L156(line 156) no Hoare annotation was computed. [2020-10-25 19:39:08,180 INFO L270 CegarLoopResult]: At program point L156-1(lines 7 165) the Hoare annotation is: false [2020-10-25 19:39:08,180 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 3) no Hoare annotation was computed. [2020-10-25 19:39:08,180 INFO L274 CegarLoopResult]: For program point L115-1(lines 41 160) no Hoare annotation was computed. [2020-10-25 19:39:08,180 INFO L274 CegarLoopResult]: For program point L140-1(lines 41 160) no Hoare annotation was computed. [2020-10-25 19:39:08,180 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-10-25 19:39:08,180 INFO L274 CegarLoopResult]: For program point L116(line 116) no Hoare annotation was computed. [2020-10-25 19:39:08,180 INFO L274 CegarLoopResult]: For program point L141(line 141) no Hoare annotation was computed. [2020-10-25 19:39:08,180 INFO L274 CegarLoopResult]: For program point L100-1(lines 41 160) no Hoare annotation was computed. [2020-10-25 19:39:08,181 INFO L274 CegarLoopResult]: For program point L125-1(lines 41 160) no Hoare annotation was computed. [2020-10-25 19:39:08,181 INFO L274 CegarLoopResult]: For program point L92-1(lines 41 160) no Hoare annotation was computed. [2020-10-25 19:39:08,181 INFO L274 CegarLoopResult]: For program point L150-1(lines 41 160) no Hoare annotation was computed. [2020-10-25 19:39:08,181 INFO L274 CegarLoopResult]: For program point L84-1(lines 41 160) no Hoare annotation was computed. [2020-10-25 19:39:08,181 INFO L274 CegarLoopResult]: For program point L43(lines 43 45) no Hoare annotation was computed. [2020-10-25 19:39:08,183 INFO L274 CegarLoopResult]: For program point L76-1(lines 41 160) no Hoare annotation was computed. [2020-10-25 19:39:08,183 INFO L274 CegarLoopResult]: For program point L68(lines 68 70) no Hoare annotation was computed. [2020-10-25 19:39:08,183 INFO L274 CegarLoopResult]: For program point L68-2(lines 41 160) no Hoare annotation was computed. [2020-10-25 19:39:08,200 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.10 07:39:08 BoogieIcfgContainer [2020-10-25 19:39:08,200 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-25 19:39:08,201 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-25 19:39:08,201 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-25 19:39:08,202 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-25 19:39:08,202 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.10 07:38:59" (3/4) ... [2020-10-25 19:39:08,206 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-10-25 19:39:08,224 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2020-10-25 19:39:08,225 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2020-10-25 19:39:08,225 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-10-25 19:39:08,226 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-10-25 19:39:08,350 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2020-10-25 19:39:08,351 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-25 19:39:08,353 INFO L168 Benchmark]: Toolchain (without parser) took 10129.24 ms. Allocated memory was 48.2 MB in the beginning and 1.5 GB in the end (delta: 1.5 GB). Free memory was 25.3 MB in the beginning and 1.4 GB in the end (delta: -1.3 GB). Peak memory consumption was 422.6 MB. Max. memory is 16.1 GB. [2020-10-25 19:39:08,354 INFO L168 Benchmark]: CDTParser took 0.35 ms. Allocated memory is still 48.2 MB. Free memory was 34.4 MB in the beginning and 34.3 MB in the end (delta: 26.7 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-10-25 19:39:08,354 INFO L168 Benchmark]: CACSL2BoogieTranslator took 446.09 ms. Allocated memory is still 48.2 MB. Free memory was 24.6 MB in the beginning and 27.7 MB in the end (delta: -3.0 MB). Peak memory consumption was 7.7 MB. Max. memory is 16.1 GB. [2020-10-25 19:39:08,355 INFO L168 Benchmark]: Boogie Procedure Inliner took 55.54 ms. Allocated memory is still 48.2 MB. Free memory was 27.7 MB in the beginning and 26.0 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-10-25 19:39:08,355 INFO L168 Benchmark]: Boogie Preprocessor took 28.61 ms. Allocated memory is still 48.2 MB. Free memory was 26.0 MB in the beginning and 24.7 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-10-25 19:39:08,356 INFO L168 Benchmark]: RCFGBuilder took 481.13 ms. Allocated memory was 48.2 MB in the beginning and 58.7 MB in the end (delta: 10.5 MB). Free memory was 24.6 MB in the beginning and 39.3 MB in the end (delta: -14.7 MB). Peak memory consumption was 8.1 MB. Max. memory is 16.1 GB. [2020-10-25 19:39:08,356 INFO L168 Benchmark]: TraceAbstraction took 8954.65 ms. Allocated memory was 58.7 MB in the beginning and 650.1 MB in the end (delta: 591.4 MB). Free memory was 39.0 MB in the beginning and 210.3 MB in the end (delta: -171.3 MB). Peak memory consumption was 419.1 MB. Max. memory is 16.1 GB. [2020-10-25 19:39:08,357 INFO L168 Benchmark]: Witness Printer took 150.00 ms. Allocated memory was 650.1 MB in the beginning and 1.5 GB in the end (delta: 855.6 MB). Free memory was 210.3 MB in the beginning and 1.4 GB in the end (delta: -1.2 GB). Peak memory consumption was 4.5 MB. Max. memory is 16.1 GB. [2020-10-25 19:39:08,360 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.35 ms. Allocated memory is still 48.2 MB. Free memory was 34.4 MB in the beginning and 34.3 MB in the end (delta: 26.7 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 446.09 ms. Allocated memory is still 48.2 MB. Free memory was 24.6 MB in the beginning and 27.7 MB in the end (delta: -3.0 MB). Peak memory consumption was 7.7 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 55.54 ms. Allocated memory is still 48.2 MB. Free memory was 27.7 MB in the beginning and 26.0 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 28.61 ms. Allocated memory is still 48.2 MB. Free memory was 26.0 MB in the beginning and 24.7 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 481.13 ms. Allocated memory was 48.2 MB in the beginning and 58.7 MB in the end (delta: 10.5 MB). Free memory was 24.6 MB in the beginning and 39.3 MB in the end (delta: -14.7 MB). Peak memory consumption was 8.1 MB. Max. memory is 16.1 GB. * TraceAbstraction took 8954.65 ms. Allocated memory was 58.7 MB in the beginning and 650.1 MB in the end (delta: 591.4 MB). Free memory was 39.0 MB in the beginning and 210.3 MB in the end (delta: -171.3 MB). Peak memory consumption was 419.1 MB. Max. memory is 16.1 GB. * Witness Printer took 150.00 ms. Allocated memory was 650.1 MB in the beginning and 1.5 GB in the end (delta: 855.6 MB). Free memory was 210.3 MB in the beginning and 1.4 GB in the end (delta: -1.2 GB). Peak memory consumption was 4.5 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 3]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 41]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 7]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 7]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 6]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 41 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 8.8s, OverallIterations: 28, TraceHistogramMax: 1, AutomataDifference: 3.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 2304 SDtfs, 1149 SDslu, 1533 SDs, 0 SdLazy, 149 SolverSat, 28 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 84 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=22533occurred in iteration=27, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 3.3s AutomataMinimizationTime, 28 MinimizatonAttempts, 4124 StatesRemovedByMinimization, 27 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 4 LocationsWithAnnotation, 4 PreInvPairs, 1033 NumberOfFragments, 4 HoareAnnotationTreeSize, 4 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 4 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 0.7s InterpolantComputationTime, 608 NumberOfCodeBlocks, 608 NumberOfCodeBlocksAsserted, 28 NumberOfCheckSat, 580 ConstructedInterpolants, 0 QuantifiedInterpolants, 25948 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 28 InterpolantComputations, 28 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...