./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/float-benchs/Muller_Kahan.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ee8e70e7 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/float-benchs/Muller_Kahan.c -s /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate-2/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 34d9ef61eabdd9c5759553acd1add875b11b0827 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Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/float-benchs/Muller_Kahan.c -s /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate-2/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 34d9ef61eabdd9c5759553acd1add875b11b0827 .................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: UNKNOWN --- Real Ultimate output --- This is Ultimate 0.2.0-ee8e70e [2020-10-24 14:17:19,400 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-24 14:17:19,405 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-24 14:17:19,467 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-24 14:17:19,468 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-24 14:17:19,473 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-24 14:17:19,479 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-24 14:17:19,484 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-24 14:17:19,487 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-24 14:17:19,494 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-24 14:17:19,496 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-24 14:17:19,501 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-24 14:17:19,502 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-24 14:17:19,506 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-24 14:17:19,508 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-24 14:17:19,510 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-24 14:17:19,512 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-24 14:17:19,515 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-24 14:17:19,519 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-24 14:17:19,528 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-24 14:17:19,530 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-24 14:17:19,532 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-24 14:17:19,535 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-24 14:17:19,537 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-24 14:17:19,546 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-24 14:17:19,547 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-24 14:17:19,547 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-24 14:17:19,550 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-24 14:17:19,551 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-24 14:17:19,552 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-24 14:17:19,552 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-24 14:17:19,553 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-24 14:17:19,556 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-24 14:17:19,557 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-24 14:17:19,558 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-24 14:17:19,559 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-24 14:17:19,560 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-24 14:17:19,560 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-24 14:17:19,560 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-24 14:17:19,562 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-24 14:17:19,566 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-24 14:17:19,567 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-24 14:17:19,632 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-24 14:17:19,633 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-24 14:17:19,636 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-24 14:17:19,636 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-24 14:17:19,637 INFO L138 SettingsManager]: * Use SBE=true [2020-10-24 14:17:19,637 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-24 14:17:19,637 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-24 14:17:19,638 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-24 14:17:19,638 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-24 14:17:19,638 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-24 14:17:19,639 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-24 14:17:19,640 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-24 14:17:19,640 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-24 14:17:19,640 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-24 14:17:19,641 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-24 14:17:19,641 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-24 14:17:19,641 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-24 14:17:19,641 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-24 14:17:19,642 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-24 14:17:19,642 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-24 14:17:19,642 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-24 14:17:19,643 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-24 14:17:19,643 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-24 14:17:19,643 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-24 14:17:19,644 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-24 14:17:19,644 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-24 14:17:19,644 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-24 14:17:19,644 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-24 14:17:19,645 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-24 14:17:19,645 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-2/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 34d9ef61eabdd9c5759553acd1add875b11b0827 [2020-10-24 14:17:20,050 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-24 14:17:20,083 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-24 14:17:20,087 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-24 14:17:20,089 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-24 14:17:20,095 INFO L275 PluginConnector]: CDTParser initialized [2020-10-24 14:17:20,097 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/float-benchs/Muller_Kahan.c [2020-10-24 14:17:20,180 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f79c3b2fe/75536207bf0d4d6fb34913384f8d0307/FLAG85159d6d6 [2020-10-24 14:17:20,784 INFO L306 CDTParser]: Found 1 translation units. [2020-10-24 14:17:20,785 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/releaseScripts/default/sv-benchmarks/c/float-benchs/Muller_Kahan.c [2020-10-24 14:17:20,794 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f79c3b2fe/75536207bf0d4d6fb34913384f8d0307/FLAG85159d6d6 [2020-10-24 14:17:21,142 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f79c3b2fe/75536207bf0d4d6fb34913384f8d0307 [2020-10-24 14:17:21,147 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-24 14:17:21,155 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-24 14:17:21,157 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-24 14:17:21,158 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-24 14:17:21,162 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-24 14:17:21,163 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 02:17:21" (1/1) ... [2020-10-24 14:17:21,167 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@174b8bc0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:17:21, skipping insertion in model container [2020-10-24 14:17:21,188 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 02:17:21" (1/1) ... [2020-10-24 14:17:21,217 INFO L146 MainTranslator]: Starting translation in SV-COMP mode [2020-10-24 14:17:21,244 INFO L179 MainTranslator]: Built tables and reachable declarations [2020-10-24 14:17:21,453 INFO L211 PostProcessor]: Analyzing one entry point: main [2020-10-24 14:17:21,466 INFO L212 MainTranslator]: Completed pre-run [2020-10-24 14:17:21,486 INFO L211 PostProcessor]: Analyzing one entry point: main [2020-10-24 14:17:21,507 INFO L217 MainTranslator]: Completed translation [2020-10-24 14:17:21,508 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:17:21 WrapperNode [2020-10-24 14:17:21,508 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-24 14:17:21,510 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-24 14:17:21,510 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-24 14:17:21,511 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-24 14:17:21,521 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:17:21" (1/1) ... [2020-10-24 14:17:21,530 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:17:21" (1/1) ... [2020-10-24 14:17:21,555 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-24 14:17:21,556 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-24 14:17:21,557 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-24 14:17:21,557 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-24 14:17:21,569 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:17:21" (1/1) ... [2020-10-24 14:17:21,569 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:17:21" (1/1) ... [2020-10-24 14:17:21,571 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:17:21" (1/1) ... [2020-10-24 14:17:21,572 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:17:21" (1/1) ... [2020-10-24 14:17:21,577 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:17:21" (1/1) ... [2020-10-24 14:17:21,582 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:17:21" (1/1) ... [2020-10-24 14:17:21,583 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:17:21" (1/1) ... [2020-10-24 14:17:21,585 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-24 14:17:21,587 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-24 14:17:21,587 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-24 14:17:21,587 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-24 14:17:21,588 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:17:21" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-24 14:17:21,699 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-24 14:17:21,699 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-24 14:17:21,700 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-24 14:17:21,700 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-24 14:17:21,953 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-24 14:17:21,954 INFO L298 CfgBuilder]: Removed 9 assume(true) statements. [2020-10-24 14:17:21,956 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 02:17:21 BoogieIcfgContainer [2020-10-24 14:17:21,957 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-24 14:17:21,959 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-24 14:17:21,959 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-24 14:17:21,964 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-24 14:17:21,964 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 02:17:21" (1/3) ... [2020-10-24 14:17:21,965 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2bf62d47 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 02:17:21, skipping insertion in model container [2020-10-24 14:17:21,966 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:17:21" (2/3) ... [2020-10-24 14:17:21,966 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2bf62d47 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 02:17:21, skipping insertion in model container [2020-10-24 14:17:21,967 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 02:17:21" (3/3) ... [2020-10-24 14:17:21,969 INFO L111 eAbstractionObserver]: Analyzing ICFG Muller_Kahan.c [2020-10-24 14:17:21,984 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-24 14:17:21,991 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-24 14:17:22,007 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-24 14:17:22,042 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-24 14:17:22,042 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-24 14:17:22,043 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-24 14:17:22,043 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-24 14:17:22,043 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-24 14:17:22,043 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-24 14:17:22,044 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-24 14:17:22,044 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-24 14:17:22,060 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states. [2020-10-24 14:17:22,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-10-24 14:17:22,066 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 14:17:22,067 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-10-24 14:17:22,068 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 14:17:22,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 14:17:22,075 INFO L82 PathProgramCache]: Analyzing trace with hash 889605037, now seen corresponding path program 1 times [2020-10-24 14:17:22,087 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-24 14:17:22,088 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742409962] [2020-10-24 14:17:22,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 14:17:22,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 14:17:22,286 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 14:17:22,288 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742409962] [2020-10-24 14:17:22,289 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-24 14:17:22,289 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-24 14:17:22,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087038935] [2020-10-24 14:17:22,296 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-24 14:17:22,297 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-24 14:17:22,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-24 14:17:22,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-24 14:17:22,320 INFO L87 Difference]: Start difference. First operand 13 states. Second operand 3 states. [2020-10-24 14:17:22,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 14:17:22,368 INFO L93 Difference]: Finished difference Result 23 states and 27 transitions. [2020-10-24 14:17:22,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-24 14:17:22,372 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 6 [2020-10-24 14:17:22,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 14:17:22,384 INFO L225 Difference]: With dead ends: 23 [2020-10-24 14:17:22,384 INFO L226 Difference]: Without dead ends: 10 [2020-10-24 14:17:22,389 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 [2020-10-24 14:17:22,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2020-10-24 14:17:22,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 9. [2020-10-24 14:17:22,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2020-10-24 14:17:22,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2020-10-24 14:17:22,440 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 6 [2020-10-24 14:17:22,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 14:17:22,441 INFO L481 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2020-10-24 14:17:22,441 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-24 14:17:22,441 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2020-10-24 14:17:22,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-10-24 14:17:22,442 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 14:17:22,442 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 14:17:22,443 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-24 14:17:22,443 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 14:17:22,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 14:17:22,445 INFO L82 PathProgramCache]: Analyzing trace with hash 265180975, now seen corresponding path program 1 times [2020-10-24 14:17:22,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-24 14:17:22,446 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567164314] [2020-10-24 14:17:22,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 14:17:22,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 14:17:22,539 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 14:17:22,540 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567164314] [2020-10-24 14:17:22,541 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [580761690] [2020-10-24 14:17:22,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-24 14:17:22,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 14:17:22,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 3 conjunts are in the unsatisfiable core [2020-10-24 14:17:22,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-24 14:17:22,774 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 14:17:22,775 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-24 14:17:22,775 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-10-24 14:17:22,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697698148] [2020-10-24 14:17:22,778 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-24 14:17:22,778 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-24 14:17:22,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-24 14:17:22,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-10-24 14:17:22,781 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 5 states. [2020-10-24 14:17:22,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 14:17:22,832 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2020-10-24 14:17:22,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-24 14:17:22,834 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-10-24 14:17:22,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 14:17:22,835 INFO L225 Difference]: With dead ends: 16 [2020-10-24 14:17:22,835 INFO L226 Difference]: Without dead ends: 12 [2020-10-24 14:17:22,836 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-10-24 14:17:22,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2020-10-24 14:17:22,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 11. [2020-10-24 14:17:22,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2020-10-24 14:17:22,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2020-10-24 14:17:22,842 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 8 [2020-10-24 14:17:22,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 14:17:22,843 INFO L481 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2020-10-24 14:17:22,844 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-24 14:17:22,844 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2020-10-24 14:17:22,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-24 14:17:22,846 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 14:17:22,846 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2020-10-24 14:17:23,047 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-10-24 14:17:23,048 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 14:17:23,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 14:17:23,050 INFO L82 PathProgramCache]: Analyzing trace with hash 1489078833, now seen corresponding path program 2 times [2020-10-24 14:17:23,051 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-24 14:17:23,051 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899165528] [2020-10-24 14:17:23,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 14:17:23,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 14:17:23,120 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 14:17:23,120 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899165528] [2020-10-24 14:17:23,121 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [488306409] [2020-10-24 14:17:23,121 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-24 14:17:23,195 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-24 14:17:23,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-24 14:17:23,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-24 14:17:23,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-24 14:17:23,249 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 14:17:23,249 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-24 14:17:23,249 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-10-24 14:17:23,250 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893977824] [2020-10-24 14:17:23,250 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-24 14:17:23,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-24 14:17:23,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-24 14:17:23,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-10-24 14:17:23,252 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 6 states. [2020-10-24 14:17:23,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 14:17:23,291 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2020-10-24 14:17:23,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-24 14:17:23,293 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-10-24 14:17:23,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 14:17:23,293 INFO L225 Difference]: With dead ends: 18 [2020-10-24 14:17:23,294 INFO L226 Difference]: Without dead ends: 14 [2020-10-24 14:17:23,295 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-10-24 14:17:23,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-10-24 14:17:23,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 13. [2020-10-24 14:17:23,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-10-24 14:17:23,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2020-10-24 14:17:23,299 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 10 [2020-10-24 14:17:23,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 14:17:23,300 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2020-10-24 14:17:23,300 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-24 14:17:23,300 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2020-10-24 14:17:23,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-24 14:17:23,301 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 14:17:23,301 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1] [2020-10-24 14:17:23,502 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-24 14:17:23,503 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 14:17:23,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 14:17:23,505 INFO L82 PathProgramCache]: Analyzing trace with hash 833881267, now seen corresponding path program 3 times [2020-10-24 14:17:23,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-24 14:17:23,506 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114060731] [2020-10-24 14:17:23,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 14:17:23,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 14:17:23,694 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 14:17:23,695 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114060731] [2020-10-24 14:17:23,696 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [604859430] [2020-10-24 14:17:23,696 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-24 14:17:23,777 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-24 14:17:23,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-24 14:17:23,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 5 conjunts are in the unsatisfiable core [2020-10-24 14:17:23,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-24 14:17:23,858 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 14:17:23,858 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-24 14:17:23,858 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-10-24 14:17:23,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442251035] [2020-10-24 14:17:23,859 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-24 14:17:23,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-24 14:17:23,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-24 14:17:23,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-10-24 14:17:23,861 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 7 states. [2020-10-24 14:17:23,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 14:17:23,914 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2020-10-24 14:17:23,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-24 14:17:23,915 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2020-10-24 14:17:23,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 14:17:23,916 INFO L225 Difference]: With dead ends: 20 [2020-10-24 14:17:23,916 INFO L226 Difference]: Without dead ends: 16 [2020-10-24 14:17:23,917 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-10-24 14:17:23,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-10-24 14:17:23,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2020-10-24 14:17:23,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-10-24 14:17:23,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2020-10-24 14:17:23,922 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 12 [2020-10-24 14:17:23,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 14:17:23,923 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2020-10-24 14:17:23,923 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-24 14:17:23,923 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2020-10-24 14:17:23,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-24 14:17:23,924 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 14:17:23,924 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1] [2020-10-24 14:17:24,138 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-24 14:17:24,139 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 14:17:24,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 14:17:24,141 INFO L82 PathProgramCache]: Analyzing trace with hash -1745754443, now seen corresponding path program 4 times [2020-10-24 14:17:24,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-24 14:17:24,142 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489298988] [2020-10-24 14:17:24,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 14:17:24,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 14:17:24,270 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 14:17:24,271 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489298988] [2020-10-24 14:17:24,271 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [948310567] [2020-10-24 14:17:24,271 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-24 14:17:24,341 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-24 14:17:24,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-24 14:17:24,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-24 14:17:24,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-24 14:17:24,410 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 14:17:24,411 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-24 14:17:24,411 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-10-24 14:17:24,411 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616782219] [2020-10-24 14:17:24,412 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-24 14:17:24,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-24 14:17:24,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-24 14:17:24,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-10-24 14:17:24,414 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 8 states. [2020-10-24 14:17:24,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 14:17:24,471 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2020-10-24 14:17:24,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-24 14:17:24,473 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 14 [2020-10-24 14:17:24,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 14:17:24,473 INFO L225 Difference]: With dead ends: 22 [2020-10-24 14:17:24,474 INFO L226 Difference]: Without dead ends: 18 [2020-10-24 14:17:24,475 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-10-24 14:17:24,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-10-24 14:17:24,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2020-10-24 14:17:24,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-10-24 14:17:24,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2020-10-24 14:17:24,479 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 14 [2020-10-24 14:17:24,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 14:17:24,480 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2020-10-24 14:17:24,480 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-24 14:17:24,480 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2020-10-24 14:17:24,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-24 14:17:24,481 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 14:17:24,482 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1] [2020-10-24 14:17:24,682 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-24 14:17:24,683 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 14:17:24,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 14:17:24,684 INFO L82 PathProgramCache]: Analyzing trace with hash 1715425335, now seen corresponding path program 5 times [2020-10-24 14:17:24,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-24 14:17:24,686 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567384411] [2020-10-24 14:17:24,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 14:17:24,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 14:17:24,795 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 14:17:24,796 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567384411] [2020-10-24 14:17:24,796 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1786564483] [2020-10-24 14:17:24,796 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-24 14:17:24,868 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-10-24 14:17:24,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-24 14:17:24,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-24 14:17:24,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-24 14:17:24,911 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 14:17:24,911 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-24 14:17:24,911 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-10-24 14:17:24,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676700181] [2020-10-24 14:17:24,912 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-24 14:17:24,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-24 14:17:24,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-24 14:17:24,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-10-24 14:17:24,914 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 9 states. [2020-10-24 14:17:24,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 14:17:24,968 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2020-10-24 14:17:24,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-24 14:17:24,969 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 16 [2020-10-24 14:17:24,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 14:17:24,970 INFO L225 Difference]: With dead ends: 24 [2020-10-24 14:17:24,971 INFO L226 Difference]: Without dead ends: 20 [2020-10-24 14:17:24,972 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-10-24 14:17:24,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-10-24 14:17:24,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2020-10-24 14:17:24,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-10-24 14:17:24,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2020-10-24 14:17:24,977 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 16 [2020-10-24 14:17:24,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 14:17:24,977 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2020-10-24 14:17:24,977 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-24 14:17:24,978 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2020-10-24 14:17:24,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-24 14:17:24,979 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 14:17:24,979 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1] [2020-10-24 14:17:25,191 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-10-24 14:17:25,192 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 14:17:25,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 14:17:25,193 INFO L82 PathProgramCache]: Analyzing trace with hash -690462407, now seen corresponding path program 6 times [2020-10-24 14:17:25,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-24 14:17:25,194 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245655408] [2020-10-24 14:17:25,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 14:17:25,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 14:17:25,330 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 14:17:25,330 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245655408] [2020-10-24 14:17:25,331 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [58932039] [2020-10-24 14:17:25,331 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-24 14:17:25,405 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-10-24 14:17:25,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-24 14:17:25,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-24 14:17:25,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-24 14:17:25,446 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 14:17:25,446 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-24 14:17:25,446 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-10-24 14:17:25,447 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124161658] [2020-10-24 14:17:25,447 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-24 14:17:25,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-24 14:17:25,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-24 14:17:25,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-10-24 14:17:25,448 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 10 states. [2020-10-24 14:17:25,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 14:17:25,519 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2020-10-24 14:17:25,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-24 14:17:25,521 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 18 [2020-10-24 14:17:25,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 14:17:25,522 INFO L225 Difference]: With dead ends: 26 [2020-10-24 14:17:25,522 INFO L226 Difference]: Without dead ends: 22 [2020-10-24 14:17:25,523 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-10-24 14:17:25,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-10-24 14:17:25,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2020-10-24 14:17:25,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-10-24 14:17:25,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2020-10-24 14:17:25,528 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 18 [2020-10-24 14:17:25,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 14:17:25,528 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2020-10-24 14:17:25,528 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-24 14:17:25,529 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2020-10-24 14:17:25,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-24 14:17:25,529 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 14:17:25,530 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1] [2020-10-24 14:17:25,742 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-24 14:17:25,743 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 14:17:25,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 14:17:25,744 INFO L82 PathProgramCache]: Analyzing trace with hash -2056177221, now seen corresponding path program 7 times [2020-10-24 14:17:25,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-24 14:17:25,745 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601601827] [2020-10-24 14:17:25,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 14:17:25,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 14:17:25,908 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 14:17:25,909 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601601827] [2020-10-24 14:17:25,909 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1724995976] [2020-10-24 14:17:25,909 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-24 14:17:25,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 14:17:25,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-24 14:17:25,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-24 14:17:26,031 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 14:17:26,032 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-24 14:17:26,032 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-10-24 14:17:26,032 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260458714] [2020-10-24 14:17:26,032 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-24 14:17:26,033 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-24 14:17:26,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-24 14:17:26,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-10-24 14:17:26,041 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 11 states. [2020-10-24 14:17:26,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 14:17:26,107 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2020-10-24 14:17:26,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-24 14:17:26,108 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 20 [2020-10-24 14:17:26,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 14:17:26,109 INFO L225 Difference]: With dead ends: 28 [2020-10-24 14:17:26,109 INFO L226 Difference]: Without dead ends: 24 [2020-10-24 14:17:26,110 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-10-24 14:17:26,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-10-24 14:17:26,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2020-10-24 14:17:26,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-24 14:17:26,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2020-10-24 14:17:26,115 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 20 [2020-10-24 14:17:26,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 14:17:26,115 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2020-10-24 14:17:26,116 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-24 14:17:26,116 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2020-10-24 14:17:26,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-24 14:17:26,117 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 14:17:26,117 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1] [2020-10-24 14:17:26,318 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-24 14:17:26,318 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 14:17:26,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 14:17:26,319 INFO L82 PathProgramCache]: Analyzing trace with hash -248120899, now seen corresponding path program 8 times [2020-10-24 14:17:26,320 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-24 14:17:26,320 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273593172] [2020-10-24 14:17:26,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 14:17:26,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 14:17:26,495 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 14:17:26,495 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273593172] [2020-10-24 14:17:26,496 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1563555488] [2020-10-24 14:17:26,496 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-24 14:17:26,555 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-24 14:17:26,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-24 14:17:26,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-24 14:17:26,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-24 14:17:26,600 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 14:17:26,601 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-24 14:17:26,601 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-10-24 14:17:26,601 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728490470] [2020-10-24 14:17:26,602 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-24 14:17:26,602 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-24 14:17:26,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-24 14:17:26,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-10-24 14:17:26,603 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 12 states. [2020-10-24 14:17:26,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 14:17:26,648 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2020-10-24 14:17:26,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-24 14:17:26,648 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 22 [2020-10-24 14:17:26,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 14:17:26,649 INFO L225 Difference]: With dead ends: 30 [2020-10-24 14:17:26,649 INFO L226 Difference]: Without dead ends: 26 [2020-10-24 14:17:26,650 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-10-24 14:17:26,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-10-24 14:17:26,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2020-10-24 14:17:26,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-24 14:17:26,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2020-10-24 14:17:26,655 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 22 [2020-10-24 14:17:26,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 14:17:26,655 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2020-10-24 14:17:26,655 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-24 14:17:26,655 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2020-10-24 14:17:26,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-24 14:17:26,656 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 14:17:26,656 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1] [2020-10-24 14:17:26,857 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-10-24 14:17:26,858 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 14:17:26,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 14:17:26,859 INFO L82 PathProgramCache]: Analyzing trace with hash 2127216959, now seen corresponding path program 9 times [2020-10-24 14:17:26,859 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-24 14:17:26,860 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145802888] [2020-10-24 14:17:26,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 14:17:26,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 14:17:27,001 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 14:17:27,001 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145802888] [2020-10-24 14:17:27,002 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1597568657] [2020-10-24 14:17:27,002 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-24 14:17:27,068 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-10-24 14:17:27,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-24 14:17:27,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-24 14:17:27,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-24 14:17:27,109 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 14:17:27,109 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-24 14:17:27,110 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-10-24 14:17:27,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425269245] [2020-10-24 14:17:27,110 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-24 14:17:27,111 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-24 14:17:27,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-24 14:17:27,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-10-24 14:17:27,112 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 13 states. [2020-10-24 14:17:27,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 14:17:27,174 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2020-10-24 14:17:27,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-24 14:17:27,174 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 24 [2020-10-24 14:17:27,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 14:17:27,175 INFO L225 Difference]: With dead ends: 32 [2020-10-24 14:17:27,175 INFO L226 Difference]: Without dead ends: 28 [2020-10-24 14:17:27,176 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-10-24 14:17:27,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-24 14:17:27,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2020-10-24 14:17:27,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-24 14:17:27,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2020-10-24 14:17:27,181 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 24 [2020-10-24 14:17:27,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 14:17:27,182 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2020-10-24 14:17:27,182 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-24 14:17:27,182 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2020-10-24 14:17:27,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-24 14:17:27,183 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 14:17:27,183 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1] [2020-10-24 14:17:27,395 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-24 14:17:27,396 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 14:17:27,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 14:17:27,397 INFO L82 PathProgramCache]: Analyzing trace with hash -95702975, now seen corresponding path program 10 times [2020-10-24 14:17:27,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-24 14:17:27,398 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963552505] [2020-10-24 14:17:27,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 14:17:27,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 14:17:27,566 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 14:17:27,567 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963552505] [2020-10-24 14:17:27,567 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1125698564] [2020-10-24 14:17:27,567 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-24 14:17:27,618 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-24 14:17:27,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-24 14:17:27,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-24 14:17:27,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-24 14:17:27,666 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 14:17:27,666 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-24 14:17:27,666 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-10-24 14:17:27,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160411008] [2020-10-24 14:17:27,667 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-24 14:17:27,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-24 14:17:27,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-24 14:17:27,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-10-24 14:17:27,669 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 14 states. [2020-10-24 14:17:27,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 14:17:27,749 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2020-10-24 14:17:27,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-24 14:17:27,752 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 26 [2020-10-24 14:17:27,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 14:17:27,756 INFO L225 Difference]: With dead ends: 34 [2020-10-24 14:17:27,756 INFO L226 Difference]: Without dead ends: 30 [2020-10-24 14:17:27,757 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-10-24 14:17:27,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-10-24 14:17:27,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2020-10-24 14:17:27,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-24 14:17:27,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2020-10-24 14:17:27,768 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 26 [2020-10-24 14:17:27,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 14:17:27,770 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2020-10-24 14:17:27,770 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-24 14:17:27,770 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2020-10-24 14:17:27,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-24 14:17:27,772 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 14:17:27,772 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1] [2020-10-24 14:17:27,986 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-24 14:17:27,987 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 14:17:27,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 14:17:27,988 INFO L82 PathProgramCache]: Analyzing trace with hash -1723013437, now seen corresponding path program 11 times [2020-10-24 14:17:27,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-24 14:17:27,989 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072359415] [2020-10-24 14:17:27,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 14:17:28,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 14:17:28,194 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 14:17:28,194 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072359415] [2020-10-24 14:17:28,194 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [261459083] [2020-10-24 14:17:28,195 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-24 14:17:28,255 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-10-24 14:17:28,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-24 14:17:28,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-24 14:17:28,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-24 14:17:28,296 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 14:17:28,296 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-24 14:17:28,297 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-10-24 14:17:28,297 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135699799] [2020-10-24 14:17:28,297 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-24 14:17:28,298 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-24 14:17:28,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-24 14:17:28,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-10-24 14:17:28,299 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 15 states. [2020-10-24 14:17:28,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 14:17:28,374 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2020-10-24 14:17:28,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-24 14:17:28,375 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 28 [2020-10-24 14:17:28,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 14:17:28,376 INFO L225 Difference]: With dead ends: 36 [2020-10-24 14:17:28,376 INFO L226 Difference]: Without dead ends: 32 [2020-10-24 14:17:28,377 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-10-24 14:17:28,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-10-24 14:17:28,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2020-10-24 14:17:28,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-24 14:17:28,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2020-10-24 14:17:28,382 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 28 [2020-10-24 14:17:28,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 14:17:28,382 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2020-10-24 14:17:28,382 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-24 14:17:28,383 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2020-10-24 14:17:28,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-24 14:17:28,384 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 14:17:28,384 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1] [2020-10-24 14:17:28,594 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-10-24 14:17:28,595 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 14:17:28,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 14:17:28,596 INFO L82 PathProgramCache]: Analyzing trace with hash 2094695621, now seen corresponding path program 12 times [2020-10-24 14:17:28,596 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-24 14:17:28,596 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645646020] [2020-10-24 14:17:28,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 14:17:28,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 14:17:28,787 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 14:17:28,788 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645646020] [2020-10-24 14:17:28,788 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1895625329] [2020-10-24 14:17:28,788 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-24 14:17:28,860 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-10-24 14:17:28,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-24 14:17:28,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-24 14:17:28,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-24 14:17:28,903 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 14:17:28,903 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-24 14:17:28,904 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-10-24 14:17:28,904 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715354252] [2020-10-24 14:17:28,904 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-24 14:17:28,904 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-24 14:17:28,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-24 14:17:28,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-10-24 14:17:28,906 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 16 states. [2020-10-24 14:17:28,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 14:17:28,968 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2020-10-24 14:17:28,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-24 14:17:28,970 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 30 [2020-10-24 14:17:28,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 14:17:28,971 INFO L225 Difference]: With dead ends: 38 [2020-10-24 14:17:28,971 INFO L226 Difference]: Without dead ends: 34 [2020-10-24 14:17:28,971 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-10-24 14:17:28,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-24 14:17:28,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2020-10-24 14:17:28,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-24 14:17:28,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2020-10-24 14:17:28,976 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 30 [2020-10-24 14:17:28,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 14:17:28,977 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2020-10-24 14:17:28,977 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-24 14:17:28,977 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2020-10-24 14:17:28,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-24 14:17:28,978 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 14:17:28,978 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1] [2020-10-24 14:17:29,188 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-10-24 14:17:29,189 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 14:17:29,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 14:17:29,190 INFO L82 PathProgramCache]: Analyzing trace with hash -1283937721, now seen corresponding path program 13 times [2020-10-24 14:17:29,191 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-24 14:17:29,191 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881827224] [2020-10-24 14:17:29,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 14:17:29,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 14:17:29,449 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 14:17:29,450 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881827224] [2020-10-24 14:17:29,450 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1715347719] [2020-10-24 14:17:29,450 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-24 14:17:29,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 14:17:29,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-24 14:17:29,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-24 14:17:29,546 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 14:17:29,547 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-24 14:17:29,547 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-10-24 14:17:29,547 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523907345] [2020-10-24 14:17:29,548 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-24 14:17:29,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-24 14:17:29,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-24 14:17:29,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-10-24 14:17:29,549 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 17 states. [2020-10-24 14:17:29,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 14:17:29,617 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2020-10-24 14:17:29,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-24 14:17:29,618 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 32 [2020-10-24 14:17:29,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 14:17:29,619 INFO L225 Difference]: With dead ends: 40 [2020-10-24 14:17:29,619 INFO L226 Difference]: Without dead ends: 36 [2020-10-24 14:17:29,620 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-10-24 14:17:29,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-24 14:17:29,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2020-10-24 14:17:29,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-24 14:17:29,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2020-10-24 14:17:29,625 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 32 [2020-10-24 14:17:29,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 14:17:29,625 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2020-10-24 14:17:29,625 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-24 14:17:29,625 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2020-10-24 14:17:29,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-24 14:17:29,626 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 14:17:29,626 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1] [2020-10-24 14:17:29,837 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-10-24 14:17:29,838 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 14:17:29,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 14:17:29,839 INFO L82 PathProgramCache]: Analyzing trace with hash -1155303607, now seen corresponding path program 14 times [2020-10-24 14:17:29,839 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-24 14:17:29,840 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530546272] [2020-10-24 14:17:29,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 14:17:29,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 14:17:30,086 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 14:17:30,087 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530546272] [2020-10-24 14:17:30,087 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1760332256] [2020-10-24 14:17:30,087 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-24 14:17:30,141 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-24 14:17:30,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-24 14:17:30,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-24 14:17:30,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-24 14:17:30,185 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 14:17:30,186 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-24 14:17:30,186 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-10-24 14:17:30,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172259998] [2020-10-24 14:17:30,187 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-24 14:17:30,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-24 14:17:30,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-24 14:17:30,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-10-24 14:17:30,188 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 18 states. [2020-10-24 14:17:30,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 14:17:30,253 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2020-10-24 14:17:30,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-24 14:17:30,254 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 34 [2020-10-24 14:17:30,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 14:17:30,254 INFO L225 Difference]: With dead ends: 42 [2020-10-24 14:17:30,255 INFO L226 Difference]: Without dead ends: 38 [2020-10-24 14:17:30,255 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-10-24 14:17:30,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-24 14:17:30,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2020-10-24 14:17:30,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-24 14:17:30,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2020-10-24 14:17:30,261 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 34 [2020-10-24 14:17:30,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 14:17:30,261 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2020-10-24 14:17:30,261 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-24 14:17:30,261 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2020-10-24 14:17:30,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-24 14:17:30,262 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 14:17:30,262 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1] [2020-10-24 14:17:30,463 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-24 14:17:30,463 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 14:17:30,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 14:17:30,465 INFO L82 PathProgramCache]: Analyzing trace with hash -2091971637, now seen corresponding path program 15 times [2020-10-24 14:17:30,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-24 14:17:30,466 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883610657] [2020-10-24 14:17:30,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 14:17:30,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 14:17:30,724 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 14:17:30,724 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883610657] [2020-10-24 14:17:30,725 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [871528898] [2020-10-24 14:17:30,725 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-24 14:17:30,809 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2020-10-24 14:17:30,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-24 14:17:30,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-24 14:17:30,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-24 14:17:30,890 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 14:17:30,890 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-24 14:17:30,890 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-10-24 14:17:30,891 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195605185] [2020-10-24 14:17:30,891 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-24 14:17:30,891 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-24 14:17:30,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-24 14:17:30,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-10-24 14:17:30,893 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 19 states. [2020-10-24 14:17:30,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 14:17:30,974 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2020-10-24 14:17:30,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-24 14:17:30,977 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 36 [2020-10-24 14:17:30,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 14:17:30,978 INFO L225 Difference]: With dead ends: 44 [2020-10-24 14:17:30,979 INFO L226 Difference]: Without dead ends: 40 [2020-10-24 14:17:30,980 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-10-24 14:17:30,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-24 14:17:30,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2020-10-24 14:17:30,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-24 14:17:30,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2020-10-24 14:17:30,985 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 36 [2020-10-24 14:17:30,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 14:17:30,985 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2020-10-24 14:17:30,985 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-24 14:17:30,986 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2020-10-24 14:17:30,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-24 14:17:30,986 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 14:17:30,987 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1] [2020-10-24 14:17:31,197 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-10-24 14:17:31,198 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 14:17:31,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 14:17:31,199 INFO L82 PathProgramCache]: Analyzing trace with hash -286816307, now seen corresponding path program 16 times [2020-10-24 14:17:31,199 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-24 14:17:31,200 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154173697] [2020-10-24 14:17:31,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 14:17:31,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 14:17:31,521 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 14:17:31,522 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154173697] [2020-10-24 14:17:31,522 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [593361077] [2020-10-24 14:17:31,522 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-24 14:17:31,584 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-24 14:17:31,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-24 14:17:31,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-24 14:17:31,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-24 14:17:31,657 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 14:17:31,657 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-24 14:17:31,657 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-24 14:17:31,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090483061] [2020-10-24 14:17:31,662 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-24 14:17:31,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-24 14:17:31,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-24 14:17:31,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-10-24 14:17:31,663 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 20 states. [2020-10-24 14:17:31,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 14:17:31,754 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2020-10-24 14:17:31,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-24 14:17:31,756 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 38 [2020-10-24 14:17:31,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 14:17:31,756 INFO L225 Difference]: With dead ends: 46 [2020-10-24 14:17:31,756 INFO L226 Difference]: Without dead ends: 42 [2020-10-24 14:17:31,757 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-10-24 14:17:31,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-24 14:17:31,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2020-10-24 14:17:31,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-24 14:17:31,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2020-10-24 14:17:31,767 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 38 [2020-10-24 14:17:31,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 14:17:31,767 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2020-10-24 14:17:31,767 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-24 14:17:31,767 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2020-10-24 14:17:31,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-24 14:17:31,770 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 14:17:31,771 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1] [2020-10-24 14:17:31,971 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-10-24 14:17:31,971 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 14:17:31,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 14:17:31,972 INFO L82 PathProgramCache]: Analyzing trace with hash -699331761, now seen corresponding path program 17 times [2020-10-24 14:17:31,972 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-24 14:17:31,972 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191763137] [2020-10-24 14:17:31,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 14:17:31,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 14:17:32,272 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 14:17:32,273 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191763137] [2020-10-24 14:17:32,273 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730484098] [2020-10-24 14:17:32,273 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-24 14:17:32,337 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2020-10-24 14:17:32,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-24 14:17:32,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-24 14:17:32,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-24 14:17:32,392 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 14:17:32,392 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-24 14:17:32,392 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-24 14:17:32,393 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501334203] [2020-10-24 14:17:32,393 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-24 14:17:32,393 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-24 14:17:32,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-24 14:17:32,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-10-24 14:17:32,395 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 21 states. [2020-10-24 14:17:32,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 14:17:32,485 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2020-10-24 14:17:32,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-24 14:17:32,485 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 40 [2020-10-24 14:17:32,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 14:17:32,486 INFO L225 Difference]: With dead ends: 48 [2020-10-24 14:17:32,486 INFO L226 Difference]: Without dead ends: 44 [2020-10-24 14:17:32,487 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-10-24 14:17:32,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-24 14:17:32,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2020-10-24 14:17:32,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-24 14:17:32,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2020-10-24 14:17:32,493 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 40 [2020-10-24 14:17:32,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 14:17:32,493 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2020-10-24 14:17:32,493 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-24 14:17:32,494 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2020-10-24 14:17:32,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-24 14:17:32,494 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 14:17:32,495 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1] [2020-10-24 14:17:32,708 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-10-24 14:17:32,709 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 14:17:32,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 14:17:32,710 INFO L82 PathProgramCache]: Analyzing trace with hash -1989691823, now seen corresponding path program 18 times [2020-10-24 14:17:32,710 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-24 14:17:32,710 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260723212] [2020-10-24 14:17:32,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 14:17:32,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 14:17:33,109 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 14:17:33,109 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260723212] [2020-10-24 14:17:33,109 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1325750799] [2020-10-24 14:17:33,110 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-24 14:17:33,190 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2020-10-24 14:17:33,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-24 14:17:33,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-24 14:17:33,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-24 14:17:33,227 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 14:17:33,227 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-24 14:17:33,227 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-24 14:17:33,228 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896954532] [2020-10-24 14:17:33,228 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-24 14:17:33,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-24 14:17:33,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-24 14:17:33,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2020-10-24 14:17:33,230 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 22 states. [2020-10-24 14:17:33,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 14:17:33,302 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2020-10-24 14:17:33,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-24 14:17:33,303 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 42 [2020-10-24 14:17:33,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 14:17:33,304 INFO L225 Difference]: With dead ends: 50 [2020-10-24 14:17:33,305 INFO L226 Difference]: Without dead ends: 46 [2020-10-24 14:17:33,306 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2020-10-24 14:17:33,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-24 14:17:33,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2020-10-24 14:17:33,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-24 14:17:33,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2020-10-24 14:17:33,319 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 42 [2020-10-24 14:17:33,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 14:17:33,320 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2020-10-24 14:17:33,320 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-24 14:17:33,320 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2020-10-24 14:17:33,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-24 14:17:33,325 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 14:17:33,325 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1] [2020-10-24 14:17:33,526 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-24 14:17:33,526 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 14:17:33,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 14:17:33,527 INFO L82 PathProgramCache]: Analyzing trace with hash -780162861, now seen corresponding path program 19 times [2020-10-24 14:17:33,527 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-24 14:17:33,528 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286280929] [2020-10-24 14:17:33,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 14:17:33,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 14:17:33,878 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 14:17:33,879 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286280929] [2020-10-24 14:17:33,879 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [499050813] [2020-10-24 14:17:33,879 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-24 14:17:33,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 14:17:33,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-24 14:17:33,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-24 14:17:33,989 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 14:17:33,989 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-24 14:17:33,989 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-10-24 14:17:33,990 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008012431] [2020-10-24 14:17:33,990 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-24 14:17:33,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-24 14:17:33,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-24 14:17:33,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-10-24 14:17:33,992 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand 23 states. [2020-10-24 14:17:34,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 14:17:34,083 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2020-10-24 14:17:34,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-24 14:17:34,084 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 44 [2020-10-24 14:17:34,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 14:17:34,084 INFO L225 Difference]: With dead ends: 52 [2020-10-24 14:17:34,085 INFO L226 Difference]: Without dead ends: 48 [2020-10-24 14:17:34,085 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-10-24 14:17:34,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-24 14:17:34,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2020-10-24 14:17:34,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-24 14:17:34,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2020-10-24 14:17:34,090 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 44 [2020-10-24 14:17:34,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 14:17:34,091 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2020-10-24 14:17:34,091 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-24 14:17:34,091 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2020-10-24 14:17:34,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-24 14:17:34,092 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 14:17:34,092 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1] [2020-10-24 14:17:34,302 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-24 14:17:34,303 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 14:17:34,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 14:17:34,304 INFO L82 PathProgramCache]: Analyzing trace with hash 1935999701, now seen corresponding path program 20 times [2020-10-24 14:17:34,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-24 14:17:34,304 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228926209] [2020-10-24 14:17:34,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 14:17:34,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 14:17:34,656 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 14:17:34,656 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228926209] [2020-10-24 14:17:34,657 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1666759284] [2020-10-24 14:17:34,657 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-24 14:17:34,719 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-24 14:17:34,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-24 14:17:34,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-24 14:17:34,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-24 14:17:34,759 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 14:17:34,759 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-24 14:17:34,759 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-10-24 14:17:34,761 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868496185] [2020-10-24 14:17:34,762 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-24 14:17:34,764 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-24 14:17:34,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-24 14:17:34,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2020-10-24 14:17:34,766 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 24 states. [2020-10-24 14:17:34,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 14:17:34,855 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2020-10-24 14:17:34,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-24 14:17:34,856 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 46 [2020-10-24 14:17:34,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 14:17:34,857 INFO L225 Difference]: With dead ends: 54 [2020-10-24 14:17:34,857 INFO L226 Difference]: Without dead ends: 50 [2020-10-24 14:17:34,858 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2020-10-24 14:17:34,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-24 14:17:34,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2020-10-24 14:17:34,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-24 14:17:34,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2020-10-24 14:17:34,866 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 46 [2020-10-24 14:17:34,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 14:17:34,866 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2020-10-24 14:17:34,866 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-24 14:17:34,867 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2020-10-24 14:17:34,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-24 14:17:34,867 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 14:17:34,868 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 1, 1, 1, 1, 1, 1] [2020-10-24 14:17:35,078 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-10-24 14:17:35,079 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 14:17:35,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 14:17:35,079 INFO L82 PathProgramCache]: Analyzing trace with hash 828105815, now seen corresponding path program 21 times [2020-10-24 14:17:35,079 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-24 14:17:35,080 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71452875] [2020-10-24 14:17:35,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 14:17:35,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 14:17:35,531 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 14:17:35,531 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71452875] [2020-10-24 14:17:35,532 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1583512362] [2020-10-24 14:17:35,532 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-24 14:17:35,610 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2020-10-24 14:17:35,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-24 14:17:35,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-24 14:17:35,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-24 14:17:35,654 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 14:17:35,654 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-24 14:17:35,654 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-10-24 14:17:35,655 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164759075] [2020-10-24 14:17:35,655 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-24 14:17:35,655 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-24 14:17:35,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-24 14:17:35,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2020-10-24 14:17:35,656 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand 25 states. [2020-10-24 14:17:35,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 14:17:35,746 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2020-10-24 14:17:35,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-24 14:17:35,750 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 48 [2020-10-24 14:17:35,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 14:17:35,751 INFO L225 Difference]: With dead ends: 56 [2020-10-24 14:17:35,751 INFO L226 Difference]: Without dead ends: 52 [2020-10-24 14:17:35,752 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2020-10-24 14:17:35,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-24 14:17:35,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2020-10-24 14:17:35,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-24 14:17:35,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2020-10-24 14:17:35,762 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 48 [2020-10-24 14:17:35,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 14:17:35,763 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2020-10-24 14:17:35,763 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-24 14:17:35,764 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2020-10-24 14:17:35,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-24 14:17:35,765 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 14:17:35,766 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1] [2020-10-24 14:17:35,967 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-10-24 14:17:35,967 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 14:17:35,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 14:17:35,968 INFO L82 PathProgramCache]: Analyzing trace with hash 1293970777, now seen corresponding path program 22 times [2020-10-24 14:17:35,968 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-24 14:17:35,969 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66878038] [2020-10-24 14:17:35,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 14:17:35,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 14:17:36,409 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 14:17:36,409 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66878038] [2020-10-24 14:17:36,409 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1339443878] [2020-10-24 14:17:36,410 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-24 14:17:36,485 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-24 14:17:36,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-24 14:17:36,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-24 14:17:36,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-24 14:17:36,558 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 14:17:36,559 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-24 14:17:36,559 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-10-24 14:17:36,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517895767] [2020-10-24 14:17:36,561 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-24 14:17:36,561 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-24 14:17:36,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-24 14:17:36,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2020-10-24 14:17:36,562 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand 26 states. [2020-10-24 14:17:36,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 14:17:36,658 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2020-10-24 14:17:36,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-24 14:17:36,659 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 50 [2020-10-24 14:17:36,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 14:17:36,659 INFO L225 Difference]: With dead ends: 58 [2020-10-24 14:17:36,659 INFO L226 Difference]: Without dead ends: 54 [2020-10-24 14:17:36,660 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2020-10-24 14:17:36,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-24 14:17:36,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2020-10-24 14:17:36,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-24 14:17:36,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2020-10-24 14:17:36,664 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 50 [2020-10-24 14:17:36,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 14:17:36,664 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2020-10-24 14:17:36,664 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-24 14:17:36,664 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2020-10-24 14:17:36,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-24 14:17:36,665 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 14:17:36,665 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 1, 1, 1, 1, 1, 1] [2020-10-24 14:17:36,865 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-24 14:17:36,866 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 14:17:36,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 14:17:36,867 INFO L82 PathProgramCache]: Analyzing trace with hash -1981366821, now seen corresponding path program 23 times [2020-10-24 14:17:36,867 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-24 14:17:36,867 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366691932] [2020-10-24 14:17:36,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 14:17:36,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 14:17:37,290 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 14:17:37,291 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366691932] [2020-10-24 14:17:37,291 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [889611839] [2020-10-24 14:17:37,291 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-24 14:17:37,364 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2020-10-24 14:17:37,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-24 14:17:37,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 25 conjunts are in the unsatisfiable core [2020-10-24 14:17:37,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-24 14:17:37,406 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 14:17:37,406 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-24 14:17:37,407 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-10-24 14:17:37,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420941898] [2020-10-24 14:17:37,407 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-24 14:17:37,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-24 14:17:37,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-24 14:17:37,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2020-10-24 14:17:37,409 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand 27 states. [2020-10-24 14:17:37,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 14:17:37,527 INFO L93 Difference]: Finished difference Result 60 states and 60 transitions. [2020-10-24 14:17:37,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-24 14:17:37,528 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 52 [2020-10-24 14:17:37,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 14:17:37,528 INFO L225 Difference]: With dead ends: 60 [2020-10-24 14:17:37,528 INFO L226 Difference]: Without dead ends: 56 [2020-10-24 14:17:37,529 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2020-10-24 14:17:37,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-24 14:17:37,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2020-10-24 14:17:37,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-24 14:17:37,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2020-10-24 14:17:37,533 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 52 [2020-10-24 14:17:37,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 14:17:37,533 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2020-10-24 14:17:37,533 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-24 14:17:37,534 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2020-10-24 14:17:37,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-24 14:17:37,534 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 14:17:37,535 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 1, 1, 1, 1, 1, 1] [2020-10-24 14:17:37,744 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-10-24 14:17:37,745 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 14:17:37,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 14:17:37,746 INFO L82 PathProgramCache]: Analyzing trace with hash -1369770531, now seen corresponding path program 24 times [2020-10-24 14:17:37,746 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-24 14:17:37,746 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956060980] [2020-10-24 14:17:37,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 14:17:37,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 14:17:38,260 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 14:17:38,260 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956060980] [2020-10-24 14:17:38,260 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1917123721] [2020-10-24 14:17:38,261 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-24 14:17:38,352 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2020-10-24 14:17:38,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-24 14:17:38,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 26 conjunts are in the unsatisfiable core [2020-10-24 14:17:38,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-24 14:17:38,393 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 14:17:38,393 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-24 14:17:38,393 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-10-24 14:17:38,394 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746131613] [2020-10-24 14:17:38,394 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-24 14:17:38,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-24 14:17:38,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-24 14:17:38,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2020-10-24 14:17:38,400 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand 28 states. [2020-10-24 14:17:38,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 14:17:38,518 INFO L93 Difference]: Finished difference Result 62 states and 62 transitions. [2020-10-24 14:17:38,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-24 14:17:38,519 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 54 [2020-10-24 14:17:38,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 14:17:38,519 INFO L225 Difference]: With dead ends: 62 [2020-10-24 14:17:38,520 INFO L226 Difference]: Without dead ends: 58 [2020-10-24 14:17:38,520 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2020-10-24 14:17:38,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-24 14:17:38,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2020-10-24 14:17:38,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-24 14:17:38,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2020-10-24 14:17:38,524 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 54 [2020-10-24 14:17:38,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 14:17:38,525 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2020-10-24 14:17:38,525 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-24 14:17:38,525 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2020-10-24 14:17:38,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-24 14:17:38,526 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 14:17:38,526 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 1, 1, 1, 1, 1, 1] [2020-10-24 14:17:38,736 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-24 14:17:38,737 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 14:17:38,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 14:17:38,738 INFO L82 PathProgramCache]: Analyzing trace with hash -2036255393, now seen corresponding path program 25 times [2020-10-24 14:17:38,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-24 14:17:38,738 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132374012] [2020-10-24 14:17:38,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 14:17:38,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 14:17:39,288 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 14:17:39,288 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132374012] [2020-10-24 14:17:39,289 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [249502314] [2020-10-24 14:17:39,289 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-24 14:17:39,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 14:17:39,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 27 conjunts are in the unsatisfiable core [2020-10-24 14:17:39,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-24 14:17:39,403 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 14:17:39,404 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-24 14:17:39,404 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2020-10-24 14:17:39,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302127080] [2020-10-24 14:17:39,405 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-24 14:17:39,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-24 14:17:39,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-24 14:17:39,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2020-10-24 14:17:39,407 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand 29 states. [2020-10-24 14:17:39,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 14:17:39,530 INFO L93 Difference]: Finished difference Result 64 states and 64 transitions. [2020-10-24 14:17:39,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-24 14:17:39,531 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 56 [2020-10-24 14:17:39,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 14:17:39,532 INFO L225 Difference]: With dead ends: 64 [2020-10-24 14:17:39,532 INFO L226 Difference]: Without dead ends: 60 [2020-10-24 14:17:39,533 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2020-10-24 14:17:39,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-24 14:17:39,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2020-10-24 14:17:39,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-24 14:17:39,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2020-10-24 14:17:39,537 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 56 [2020-10-24 14:17:39,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 14:17:39,537 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2020-10-24 14:17:39,538 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-24 14:17:39,538 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2020-10-24 14:17:39,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-24 14:17:39,539 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 14:17:39,539 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 1, 1, 1, 1, 1, 1] [2020-10-24 14:17:39,746 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-10-24 14:17:39,747 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 14:17:39,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 14:17:39,747 INFO L82 PathProgramCache]: Analyzing trace with hash 1716886625, now seen corresponding path program 26 times [2020-10-24 14:17:39,748 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-24 14:17:39,749 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534734486] [2020-10-24 14:17:39,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 14:17:39,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 14:17:40,324 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 14:17:40,325 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534734486] [2020-10-24 14:17:40,325 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1299208396] [2020-10-24 14:17:40,325 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-24 14:17:40,396 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-24 14:17:40,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-24 14:17:40,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 28 conjunts are in the unsatisfiable core [2020-10-24 14:17:40,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-24 14:17:40,433 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 14:17:40,433 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-24 14:17:40,434 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2020-10-24 14:17:40,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967070447] [2020-10-24 14:17:40,434 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-24 14:17:40,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-24 14:17:40,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-24 14:17:40,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2020-10-24 14:17:40,436 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 30 states. [2020-10-24 14:17:40,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 14:17:40,542 INFO L93 Difference]: Finished difference Result 66 states and 66 transitions. [2020-10-24 14:17:40,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-24 14:17:40,542 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 58 [2020-10-24 14:17:40,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 14:17:40,543 INFO L225 Difference]: With dead ends: 66 [2020-10-24 14:17:40,543 INFO L226 Difference]: Without dead ends: 62 [2020-10-24 14:17:40,544 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2020-10-24 14:17:40,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-24 14:17:40,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2020-10-24 14:17:40,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-24 14:17:40,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2020-10-24 14:17:40,552 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 58 [2020-10-24 14:17:40,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 14:17:40,553 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2020-10-24 14:17:40,553 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-24 14:17:40,553 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2020-10-24 14:17:40,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-24 14:17:40,554 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 14:17:40,554 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 1, 1, 1, 1, 1, 1] [2020-10-24 14:17:40,765 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-10-24 14:17:40,766 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 14:17:40,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 14:17:40,767 INFO L82 PathProgramCache]: Analyzing trace with hash 713837283, now seen corresponding path program 27 times [2020-10-24 14:17:40,767 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-24 14:17:40,767 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505389592] [2020-10-24 14:17:40,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 14:17:40,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 14:17:41,400 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 14:17:41,400 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505389592] [2020-10-24 14:17:41,400 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [388438559] [2020-10-24 14:17:41,401 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-24 14:17:41,493 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2020-10-24 14:17:41,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-24 14:17:41,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 29 conjunts are in the unsatisfiable core [2020-10-24 14:17:41,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-24 14:17:41,551 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 14:17:41,552 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-24 14:17:41,552 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2020-10-24 14:17:41,552 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582371237] [2020-10-24 14:17:41,553 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-24 14:17:41,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-24 14:17:41,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-24 14:17:41,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2020-10-24 14:17:41,556 INFO L87 Difference]: Start difference. First operand 61 states and 61 transitions. Second operand 31 states. [2020-10-24 14:17:41,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 14:17:41,668 INFO L93 Difference]: Finished difference Result 68 states and 68 transitions. [2020-10-24 14:17:41,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-24 14:17:41,669 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 60 [2020-10-24 14:17:41,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 14:17:41,670 INFO L225 Difference]: With dead ends: 68 [2020-10-24 14:17:41,670 INFO L226 Difference]: Without dead ends: 64 [2020-10-24 14:17:41,671 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2020-10-24 14:17:41,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-24 14:17:41,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2020-10-24 14:17:41,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-24 14:17:41,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2020-10-24 14:17:41,674 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 60 [2020-10-24 14:17:41,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 14:17:41,675 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2020-10-24 14:17:41,675 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-24 14:17:41,675 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2020-10-24 14:17:41,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-24 14:17:41,676 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 14:17:41,676 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 1, 1, 1, 1, 1, 1] [2020-10-24 14:17:41,887 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-10-24 14:17:41,888 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 14:17:41,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 14:17:41,888 INFO L82 PathProgramCache]: Analyzing trace with hash -1143906075, now seen corresponding path program 28 times [2020-10-24 14:17:41,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-24 14:17:41,889 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728203161] [2020-10-24 14:17:41,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 14:17:41,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 14:17:42,550 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 14:17:42,551 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728203161] [2020-10-24 14:17:42,551 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1300658929] [2020-10-24 14:17:42,551 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-24 14:17:42,624 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-24 14:17:42,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-24 14:17:42,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 30 conjunts are in the unsatisfiable core [2020-10-24 14:17:42,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-24 14:17:42,668 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 14:17:42,669 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-24 14:17:42,669 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2020-10-24 14:17:42,670 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268095048] [2020-10-24 14:17:42,670 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-24 14:17:42,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-24 14:17:42,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-24 14:17:42,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2020-10-24 14:17:42,672 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand 32 states. [2020-10-24 14:17:42,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 14:17:42,807 INFO L93 Difference]: Finished difference Result 70 states and 70 transitions. [2020-10-24 14:17:42,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-24 14:17:42,808 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 62 [2020-10-24 14:17:42,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 14:17:42,808 INFO L225 Difference]: With dead ends: 70 [2020-10-24 14:17:42,809 INFO L226 Difference]: Without dead ends: 66 [2020-10-24 14:17:42,809 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2020-10-24 14:17:42,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-24 14:17:42,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 65. [2020-10-24 14:17:42,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-24 14:17:42,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 65 transitions. [2020-10-24 14:17:42,815 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 65 transitions. Word has length 62 [2020-10-24 14:17:42,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 14:17:42,816 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 65 transitions. [2020-10-24 14:17:42,816 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-24 14:17:42,816 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 65 transitions. [2020-10-24 14:17:42,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-24 14:17:42,817 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 14:17:42,817 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 1, 1, 1, 1, 1, 1] [2020-10-24 14:17:43,026 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-10-24 14:17:43,027 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 14:17:43,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 14:17:43,027 INFO L82 PathProgramCache]: Analyzing trace with hash 271122023, now seen corresponding path program 29 times [2020-10-24 14:17:43,028 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-24 14:17:43,028 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058900865] [2020-10-24 14:17:43,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 14:17:43,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 14:17:43,714 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 14:17:43,715 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058900865] [2020-10-24 14:17:43,715 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [797515589] [2020-10-24 14:17:43,716 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-24 14:17:43,807 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2020-10-24 14:17:43,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-24 14:17:43,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 31 conjunts are in the unsatisfiable core [2020-10-24 14:17:43,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-24 14:17:43,846 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 14:17:43,847 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-24 14:17:43,847 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2020-10-24 14:17:43,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003557207] [2020-10-24 14:17:43,848 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-24 14:17:43,849 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-24 14:17:43,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-24 14:17:43,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2020-10-24 14:17:43,850 INFO L87 Difference]: Start difference. First operand 65 states and 65 transitions. Second operand 33 states. [2020-10-24 14:17:43,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 14:17:43,981 INFO L93 Difference]: Finished difference Result 72 states and 72 transitions. [2020-10-24 14:17:43,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-24 14:17:43,982 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 64 [2020-10-24 14:17:43,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 14:17:43,983 INFO L225 Difference]: With dead ends: 72 [2020-10-24 14:17:43,984 INFO L226 Difference]: Without dead ends: 68 [2020-10-24 14:17:43,987 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2020-10-24 14:17:43,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-24 14:17:43,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 67. [2020-10-24 14:17:43,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-24 14:17:43,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2020-10-24 14:17:43,992 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 64 [2020-10-24 14:17:43,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 14:17:43,992 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2020-10-24 14:17:43,992 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-24 14:17:43,993 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2020-10-24 14:17:43,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-24 14:17:43,994 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 14:17:43,994 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 1, 1, 1, 1, 1, 1] [2020-10-24 14:17:44,206 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-24 14:17:44,206 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 14:17:44,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 14:17:44,207 INFO L82 PathProgramCache]: Analyzing trace with hash -1391508631, now seen corresponding path program 30 times [2020-10-24 14:17:44,207 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-24 14:17:44,207 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479172749] [2020-10-24 14:17:44,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 14:17:44,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 14:17:44,914 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 14:17:44,914 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479172749] [2020-10-24 14:17:44,915 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1676630143] [2020-10-24 14:17:44,915 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-24 14:17:45,055 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2020-10-24 14:17:45,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-24 14:17:45,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 32 conjunts are in the unsatisfiable core [2020-10-24 14:17:45,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-24 14:17:45,113 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 14:17:45,113 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-24 14:17:45,114 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2020-10-24 14:17:45,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996705665] [2020-10-24 14:17:45,114 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-24 14:17:45,115 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-24 14:17:45,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-24 14:17:45,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2020-10-24 14:17:45,116 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand 34 states. [2020-10-24 14:17:45,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 14:17:45,252 INFO L93 Difference]: Finished difference Result 74 states and 74 transitions. [2020-10-24 14:17:45,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-24 14:17:45,253 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 66 [2020-10-24 14:17:45,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 14:17:45,254 INFO L225 Difference]: With dead ends: 74 [2020-10-24 14:17:45,254 INFO L226 Difference]: Without dead ends: 70 [2020-10-24 14:17:45,255 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2020-10-24 14:17:45,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-24 14:17:45,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 69. [2020-10-24 14:17:45,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-24 14:17:45,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 69 transitions. [2020-10-24 14:17:45,259 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 69 transitions. Word has length 66 [2020-10-24 14:17:45,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 14:17:45,260 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 69 transitions. [2020-10-24 14:17:45,260 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-24 14:17:45,260 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 69 transitions. [2020-10-24 14:17:45,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-24 14:17:45,261 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 14:17:45,261 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 1, 1, 1, 1, 1, 1] [2020-10-24 14:17:45,472 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-24 14:17:45,472 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 14:17:45,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 14:17:45,474 INFO L82 PathProgramCache]: Analyzing trace with hash -1451733013, now seen corresponding path program 31 times [2020-10-24 14:17:45,474 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-24 14:17:45,474 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678703758] [2020-10-24 14:17:45,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 14:17:45,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 14:17:46,228 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 14:17:46,229 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678703758] [2020-10-24 14:17:46,229 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [19037889] [2020-10-24 14:17:46,229 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-24 14:17:46,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 14:17:46,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 33 conjunts are in the unsatisfiable core [2020-10-24 14:17:46,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-24 14:17:46,369 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 14:17:46,370 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-24 14:17:46,370 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2020-10-24 14:17:46,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322613047] [2020-10-24 14:17:46,371 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-24 14:17:46,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-24 14:17:46,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-24 14:17:46,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2020-10-24 14:17:46,373 INFO L87 Difference]: Start difference. First operand 69 states and 69 transitions. Second operand 35 states. [2020-10-24 14:17:46,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 14:17:46,511 INFO L93 Difference]: Finished difference Result 76 states and 76 transitions. [2020-10-24 14:17:46,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-24 14:17:46,512 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 68 [2020-10-24 14:17:46,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 14:17:46,512 INFO L225 Difference]: With dead ends: 76 [2020-10-24 14:17:46,512 INFO L226 Difference]: Without dead ends: 72 [2020-10-24 14:17:46,513 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2020-10-24 14:17:46,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-24 14:17:46,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 71. [2020-10-24 14:17:46,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-24 14:17:46,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 71 transitions. [2020-10-24 14:17:46,516 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 71 transitions. Word has length 68 [2020-10-24 14:17:46,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 14:17:46,517 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 71 transitions. [2020-10-24 14:17:46,517 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-24 14:17:46,518 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 71 transitions. [2020-10-24 14:17:46,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-24 14:17:46,519 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 14:17:46,519 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 1, 1, 1, 1, 1, 1] [2020-10-24 14:17:46,730 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-24 14:17:46,731 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 14:17:46,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 14:17:46,731 INFO L82 PathProgramCache]: Analyzing trace with hash 802178029, now seen corresponding path program 32 times [2020-10-24 14:17:46,732 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-24 14:17:46,732 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214980977] [2020-10-24 14:17:46,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 14:17:46,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 14:17:47,573 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 14:17:47,573 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214980977] [2020-10-24 14:17:47,574 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [611303472] [2020-10-24 14:17:47,574 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-24 14:17:47,658 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-24 14:17:47,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-24 14:17:47,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 34 conjunts are in the unsatisfiable core [2020-10-24 14:17:47,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-24 14:17:47,711 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 14:17:47,712 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-24 14:17:47,712 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2020-10-24 14:17:47,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071343474] [2020-10-24 14:17:47,713 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-24 14:17:47,713 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-24 14:17:47,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-24 14:17:47,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2020-10-24 14:17:47,714 INFO L87 Difference]: Start difference. First operand 71 states and 71 transitions. Second operand 36 states. [2020-10-24 14:17:47,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 14:17:47,854 INFO L93 Difference]: Finished difference Result 78 states and 78 transitions. [2020-10-24 14:17:47,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-24 14:17:47,855 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 70 [2020-10-24 14:17:47,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 14:17:47,856 INFO L225 Difference]: With dead ends: 78 [2020-10-24 14:17:47,856 INFO L226 Difference]: Without dead ends: 74 [2020-10-24 14:17:47,859 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2020-10-24 14:17:47,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-24 14:17:47,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2020-10-24 14:17:47,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-24 14:17:47,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 73 transitions. [2020-10-24 14:17:47,862 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 73 transitions. Word has length 70 [2020-10-24 14:17:47,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 14:17:47,862 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 73 transitions. [2020-10-24 14:17:47,863 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-24 14:17:47,863 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 73 transitions. [2020-10-24 14:17:47,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-24 14:17:47,863 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 14:17:47,863 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 1, 1, 1, 1, 1, 1] [2020-10-24 14:17:48,073 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2020-10-24 14:17:48,074 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 14:17:48,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 14:17:48,075 INFO L82 PathProgramCache]: Analyzing trace with hash 2147172207, now seen corresponding path program 33 times [2020-10-24 14:17:48,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-24 14:17:48,076 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030980717] [2020-10-24 14:17:48,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 14:17:48,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 14:17:48,987 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 14:17:48,987 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030980717] [2020-10-24 14:17:48,987 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644341495] [2020-10-24 14:17:48,987 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-24 14:17:49,109 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 34 check-sat command(s) [2020-10-24 14:17:49,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-24 14:17:49,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 35 conjunts are in the unsatisfiable core [2020-10-24 14:17:49,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-24 14:17:49,163 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 14:17:49,163 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-24 14:17:49,163 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2020-10-24 14:17:49,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826349127] [2020-10-24 14:17:49,164 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-24 14:17:49,164 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-24 14:17:49,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-24 14:17:49,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2020-10-24 14:17:49,166 INFO L87 Difference]: Start difference. First operand 73 states and 73 transitions. Second operand 37 states. [2020-10-24 14:17:49,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 14:17:49,314 INFO L93 Difference]: Finished difference Result 80 states and 80 transitions. [2020-10-24 14:17:49,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-24 14:17:49,315 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 72 [2020-10-24 14:17:49,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 14:17:49,316 INFO L225 Difference]: With dead ends: 80 [2020-10-24 14:17:49,316 INFO L226 Difference]: Without dead ends: 76 [2020-10-24 14:17:49,317 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2020-10-24 14:17:49,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-24 14:17:49,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 75. [2020-10-24 14:17:49,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-24 14:17:49,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 75 transitions. [2020-10-24 14:17:49,320 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 75 transitions. Word has length 72 [2020-10-24 14:17:49,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 14:17:49,321 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 75 transitions. [2020-10-24 14:17:49,321 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-24 14:17:49,321 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 75 transitions. [2020-10-24 14:17:49,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-24 14:17:49,322 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 14:17:49,322 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 1, 1, 1, 1, 1, 1] [2020-10-24 14:17:49,532 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-24 14:17:49,533 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 14:17:49,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 14:17:49,534 INFO L82 PathProgramCache]: Analyzing trace with hash 1901421169, now seen corresponding path program 34 times [2020-10-24 14:17:49,534 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-24 14:17:49,534 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431422082] [2020-10-24 14:17:49,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 14:17:49,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 14:17:50,497 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 14:17:50,498 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431422082] [2020-10-24 14:17:50,498 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1647948720] [2020-10-24 14:17:50,498 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-24 14:17:50,577 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-24 14:17:50,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-24 14:17:50,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 36 conjunts are in the unsatisfiable core [2020-10-24 14:17:50,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-24 14:17:50,614 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 14:17:50,615 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-24 14:17:50,615 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2020-10-24 14:17:50,615 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469696033] [2020-10-24 14:17:50,616 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-24 14:17:50,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-24 14:17:50,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-24 14:17:50,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2020-10-24 14:17:50,617 INFO L87 Difference]: Start difference. First operand 75 states and 75 transitions. Second operand 38 states. [2020-10-24 14:17:50,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 14:17:50,761 INFO L93 Difference]: Finished difference Result 82 states and 82 transitions. [2020-10-24 14:17:50,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-24 14:17:50,761 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 74 [2020-10-24 14:17:50,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 14:17:50,762 INFO L225 Difference]: With dead ends: 82 [2020-10-24 14:17:50,762 INFO L226 Difference]: Without dead ends: 78 [2020-10-24 14:17:50,763 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2020-10-24 14:17:50,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-24 14:17:50,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 77. [2020-10-24 14:17:50,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-24 14:17:50,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 77 transitions. [2020-10-24 14:17:50,766 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 77 transitions. Word has length 74 [2020-10-24 14:17:50,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 14:17:50,767 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 77 transitions. [2020-10-24 14:17:50,767 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-24 14:17:50,767 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 77 transitions. [2020-10-24 14:17:50,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-24 14:17:50,767 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 14:17:50,768 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 1, 1, 1, 1, 1, 1] [2020-10-24 14:17:50,977 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2020-10-24 14:17:50,978 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 14:17:50,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 14:17:50,978 INFO L82 PathProgramCache]: Analyzing trace with hash 1957874931, now seen corresponding path program 35 times [2020-10-24 14:17:50,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-24 14:17:50,979 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895037559] [2020-10-24 14:17:50,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 14:17:50,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 14:17:52,022 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 14:17:52,022 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895037559] [2020-10-24 14:17:52,023 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [96359775] [2020-10-24 14:17:52,023 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-24 14:17:52,114 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 36 check-sat command(s) [2020-10-24 14:17:52,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-24 14:17:52,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 37 conjunts are in the unsatisfiable core [2020-10-24 14:17:52,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-24 14:17:52,158 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 14:17:52,158 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-24 14:17:52,159 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 39 [2020-10-24 14:17:52,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102920126] [2020-10-24 14:17:52,159 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-24 14:17:52,160 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-24 14:17:52,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-24 14:17:52,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2020-10-24 14:17:52,161 INFO L87 Difference]: Start difference. First operand 77 states and 77 transitions. Second operand 39 states. [2020-10-24 14:17:52,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 14:17:52,304 INFO L93 Difference]: Finished difference Result 84 states and 84 transitions. [2020-10-24 14:17:52,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-24 14:17:52,305 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 76 [2020-10-24 14:17:52,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 14:17:52,306 INFO L225 Difference]: With dead ends: 84 [2020-10-24 14:17:52,306 INFO L226 Difference]: Without dead ends: 80 [2020-10-24 14:17:52,307 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2020-10-24 14:17:52,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-24 14:17:52,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 79. [2020-10-24 14:17:52,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-24 14:17:52,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 79 transitions. [2020-10-24 14:17:52,310 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 79 transitions. Word has length 76 [2020-10-24 14:17:52,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 14:17:52,311 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 79 transitions. [2020-10-24 14:17:52,311 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-24 14:17:52,311 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 79 transitions. [2020-10-24 14:17:52,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-24 14:17:52,312 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 14:17:52,312 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 1, 1, 1, 1, 1, 1] [2020-10-24 14:17:52,519 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-24 14:17:52,520 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 14:17:52,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 14:17:52,521 INFO L82 PathProgramCache]: Analyzing trace with hash 375365365, now seen corresponding path program 36 times [2020-10-24 14:17:52,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-24 14:17:52,521 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619156709] [2020-10-24 14:17:52,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 14:17:52,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 14:17:53,609 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 14:17:53,610 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619156709] [2020-10-24 14:17:53,610 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2046436205] [2020-10-24 14:17:53,610 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-24 14:17:53,728 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2020-10-24 14:17:53,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-24 14:17:53,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 38 conjunts are in the unsatisfiable core [2020-10-24 14:17:53,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-24 14:17:53,770 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 14:17:53,771 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-24 14:17:53,771 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 40 [2020-10-24 14:17:53,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419309645] [2020-10-24 14:17:53,772 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-24 14:17:53,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-24 14:17:53,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-24 14:17:53,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2020-10-24 14:17:53,774 INFO L87 Difference]: Start difference. First operand 79 states and 79 transitions. Second operand 40 states. [2020-10-24 14:17:53,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 14:17:53,932 INFO L93 Difference]: Finished difference Result 86 states and 86 transitions. [2020-10-24 14:17:53,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-24 14:17:53,933 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 78 [2020-10-24 14:17:53,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 14:17:53,934 INFO L225 Difference]: With dead ends: 86 [2020-10-24 14:17:53,934 INFO L226 Difference]: Without dead ends: 82 [2020-10-24 14:17:53,935 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2020-10-24 14:17:53,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-24 14:17:53,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 81. [2020-10-24 14:17:53,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-24 14:17:53,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 81 transitions. [2020-10-24 14:17:53,940 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 81 transitions. Word has length 78 [2020-10-24 14:17:53,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 14:17:53,940 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 81 transitions. [2020-10-24 14:17:53,940 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-24 14:17:53,940 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 81 transitions. [2020-10-24 14:17:53,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-24 14:17:53,941 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 14:17:53,941 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 1, 1, 1, 1, 1, 1] [2020-10-24 14:17:54,153 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-10-24 14:17:54,153 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 14:17:54,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 14:17:54,154 INFO L82 PathProgramCache]: Analyzing trace with hash 2095223, now seen corresponding path program 37 times [2020-10-24 14:17:54,155 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-24 14:17:54,155 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273582380] [2020-10-24 14:17:54,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 14:17:54,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 14:17:55,298 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 14:17:55,298 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273582380] [2020-10-24 14:17:55,298 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [943593788] [2020-10-24 14:17:55,298 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-24 14:17:55,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 14:17:55,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 39 conjunts are in the unsatisfiable core [2020-10-24 14:17:55,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-24 14:17:55,431 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 14:17:55,432 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-24 14:17:55,432 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 41 [2020-10-24 14:17:55,432 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211528482] [2020-10-24 14:17:55,433 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-24 14:17:55,433 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-24 14:17:55,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-24 14:17:55,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2020-10-24 14:17:55,435 INFO L87 Difference]: Start difference. First operand 81 states and 81 transitions. Second operand 41 states. [2020-10-24 14:17:55,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 14:17:55,603 INFO L93 Difference]: Finished difference Result 88 states and 88 transitions. [2020-10-24 14:17:55,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-24 14:17:55,603 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 80 [2020-10-24 14:17:55,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 14:17:55,604 INFO L225 Difference]: With dead ends: 88 [2020-10-24 14:17:55,605 INFO L226 Difference]: Without dead ends: 84 [2020-10-24 14:17:55,605 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2020-10-24 14:17:55,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-24 14:17:55,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 83. [2020-10-24 14:17:55,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-24 14:17:55,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 83 transitions. [2020-10-24 14:17:55,610 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 83 transitions. Word has length 80 [2020-10-24 14:17:55,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 14:17:55,610 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 83 transitions. [2020-10-24 14:17:55,610 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-24 14:17:55,611 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 83 transitions. [2020-10-24 14:17:55,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-24 14:17:55,612 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 14:17:55,612 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 1, 1, 1, 1, 1, 1] [2020-10-24 14:17:55,823 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-10-24 14:17:55,824 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 14:17:55,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 14:17:55,824 INFO L82 PathProgramCache]: Analyzing trace with hash 2066741625, now seen corresponding path program 38 times [2020-10-24 14:17:55,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-24 14:17:55,825 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534859740] [2020-10-24 14:17:55,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 14:17:55,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 14:17:56,968 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 14:17:56,968 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534859740] [2020-10-24 14:17:56,968 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644281444] [2020-10-24 14:17:56,968 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-24 14:17:57,054 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-24 14:17:57,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-24 14:17:57,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 40 conjunts are in the unsatisfiable core [2020-10-24 14:17:57,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-24 14:17:57,093 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 14:17:57,094 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-24 14:17:57,094 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 42 [2020-10-24 14:17:57,094 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215009008] [2020-10-24 14:17:57,095 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-10-24 14:17:57,095 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-24 14:17:57,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-10-24 14:17:57,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2020-10-24 14:17:57,096 INFO L87 Difference]: Start difference. First operand 83 states and 83 transitions. Second operand 42 states. [2020-10-24 14:17:57,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 14:17:57,288 INFO L93 Difference]: Finished difference Result 90 states and 90 transitions. [2020-10-24 14:17:57,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-24 14:17:57,289 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 82 [2020-10-24 14:17:57,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 14:17:57,290 INFO L225 Difference]: With dead ends: 90 [2020-10-24 14:17:57,290 INFO L226 Difference]: Without dead ends: 86 [2020-10-24 14:17:57,291 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2020-10-24 14:17:57,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-24 14:17:57,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2020-10-24 14:17:57,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-24 14:17:57,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 85 transitions. [2020-10-24 14:17:57,294 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 85 transitions. Word has length 82 [2020-10-24 14:17:57,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 14:17:57,294 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 85 transitions. [2020-10-24 14:17:57,294 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-10-24 14:17:57,294 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 85 transitions. [2020-10-24 14:17:57,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-24 14:17:57,295 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 14:17:57,295 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 1, 1, 1, 1, 1, 1] [2020-10-24 14:17:57,495 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-10-24 14:17:57,496 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 14:17:57,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 14:17:57,497 INFO L82 PathProgramCache]: Analyzing trace with hash 1917043195, now seen corresponding path program 39 times [2020-10-24 14:17:57,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-24 14:17:57,497 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683858790] [2020-10-24 14:17:57,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 14:17:57,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 14:17:58,709 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 14:17:58,709 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683858790] [2020-10-24 14:17:58,709 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1366282290] [2020-10-24 14:17:58,712 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-24 14:17:58,848 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 40 check-sat command(s) [2020-10-24 14:17:58,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-24 14:17:58,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 41 conjunts are in the unsatisfiable core [2020-10-24 14:17:58,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-24 14:17:58,903 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 14:17:58,903 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-24 14:17:58,904 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 43 [2020-10-24 14:17:58,904 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137424040] [2020-10-24 14:17:58,904 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-10-24 14:17:58,904 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-24 14:17:58,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-10-24 14:17:58,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2020-10-24 14:17:58,906 INFO L87 Difference]: Start difference. First operand 85 states and 85 transitions. Second operand 43 states. [2020-10-24 14:17:59,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 14:17:59,083 INFO L93 Difference]: Finished difference Result 92 states and 92 transitions. [2020-10-24 14:17:59,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-24 14:17:59,084 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 84 [2020-10-24 14:17:59,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 14:17:59,085 INFO L225 Difference]: With dead ends: 92 [2020-10-24 14:17:59,085 INFO L226 Difference]: Without dead ends: 88 [2020-10-24 14:17:59,086 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2020-10-24 14:17:59,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-24 14:17:59,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 87. [2020-10-24 14:17:59,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-24 14:17:59,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 87 transitions. [2020-10-24 14:17:59,090 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 87 transitions. Word has length 84 [2020-10-24 14:17:59,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 14:17:59,091 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 87 transitions. [2020-10-24 14:17:59,091 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-10-24 14:17:59,091 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 87 transitions. [2020-10-24 14:17:59,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-10-24 14:17:59,092 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 14:17:59,092 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 1, 1, 1, 1, 1, 1] [2020-10-24 14:17:59,302 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-10-24 14:17:59,303 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 14:17:59,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 14:17:59,304 INFO L82 PathProgramCache]: Analyzing trace with hash -209227267, now seen corresponding path program 40 times [2020-10-24 14:17:59,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-24 14:17:59,304 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565684745] [2020-10-24 14:17:59,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 14:17:59,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 14:18:00,605 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 14:18:00,606 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565684745] [2020-10-24 14:18:00,606 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1560452508] [2020-10-24 14:18:00,606 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-24 14:18:00,702 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-24 14:18:00,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-24 14:18:00,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 42 conjunts are in the unsatisfiable core [2020-10-24 14:18:00,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-24 14:18:00,757 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 14:18:00,758 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-24 14:18:00,758 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 44 [2020-10-24 14:18:00,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594356888] [2020-10-24 14:18:00,759 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-10-24 14:18:00,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-24 14:18:00,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-10-24 14:18:00,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2020-10-24 14:18:00,760 INFO L87 Difference]: Start difference. First operand 87 states and 87 transitions. Second operand 44 states. [2020-10-24 14:18:00,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 14:18:00,906 INFO L93 Difference]: Finished difference Result 94 states and 94 transitions. [2020-10-24 14:18:00,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-24 14:18:00,907 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 86 [2020-10-24 14:18:00,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 14:18:00,908 INFO L225 Difference]: With dead ends: 94 [2020-10-24 14:18:00,908 INFO L226 Difference]: Without dead ends: 90 [2020-10-24 14:18:00,909 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2020-10-24 14:18:00,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-24 14:18:00,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 89. [2020-10-24 14:18:00,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-24 14:18:00,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 89 transitions. [2020-10-24 14:18:00,913 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 89 transitions. Word has length 86 [2020-10-24 14:18:00,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 14:18:00,914 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 89 transitions. [2020-10-24 14:18:00,914 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-10-24 14:18:00,914 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 89 transitions. [2020-10-24 14:18:00,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-10-24 14:18:00,915 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 14:18:00,915 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 1, 1, 1, 1, 1, 1] [2020-10-24 14:18:01,124 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-24 14:18:01,125 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 14:18:01,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 14:18:01,126 INFO L82 PathProgramCache]: Analyzing trace with hash 849291647, now seen corresponding path program 41 times [2020-10-24 14:18:01,126 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-24 14:18:01,126 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109564402] [2020-10-24 14:18:01,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 14:18:01,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 14:18:02,407 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 14:18:02,407 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109564402] [2020-10-24 14:18:02,407 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [572883567] [2020-10-24 14:18:02,408 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-24 14:18:02,532 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 42 check-sat command(s) [2020-10-24 14:18:02,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-24 14:18:02,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 43 conjunts are in the unsatisfiable core [2020-10-24 14:18:02,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-24 14:18:02,580 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 14:18:02,580 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-24 14:18:02,580 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 45 [2020-10-24 14:18:02,580 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127021352] [2020-10-24 14:18:02,581 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-10-24 14:18:02,581 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-24 14:18:02,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-10-24 14:18:02,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2020-10-24 14:18:02,582 INFO L87 Difference]: Start difference. First operand 89 states and 89 transitions. Second operand 45 states. [2020-10-24 14:18:02,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 14:18:02,800 INFO L93 Difference]: Finished difference Result 96 states and 96 transitions. [2020-10-24 14:18:02,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-24 14:18:02,801 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 88 [2020-10-24 14:18:02,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 14:18:02,803 INFO L225 Difference]: With dead ends: 96 [2020-10-24 14:18:02,803 INFO L226 Difference]: Without dead ends: 92 [2020-10-24 14:18:02,804 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2020-10-24 14:18:02,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-24 14:18:02,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 91. [2020-10-24 14:18:02,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-24 14:18:02,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 91 transitions. [2020-10-24 14:18:02,807 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 91 transitions. Word has length 88 [2020-10-24 14:18:02,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 14:18:02,807 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 91 transitions. [2020-10-24 14:18:02,807 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-10-24 14:18:02,807 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 91 transitions. [2020-10-24 14:18:02,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-10-24 14:18:02,808 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 14:18:02,808 INFO L422 BasicCegarLoop]: trace histogram [42, 42, 1, 1, 1, 1, 1, 1] [2020-10-24 14:18:03,018 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2020-10-24 14:18:03,019 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 14:18:03,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 14:18:03,020 INFO L82 PathProgramCache]: Analyzing trace with hash 178718849, now seen corresponding path program 42 times [2020-10-24 14:18:03,020 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-24 14:18:03,020 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207023721] [2020-10-24 14:18:03,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 14:18:03,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 14:18:04,358 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 0 proven. 1764 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 14:18:04,358 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207023721] [2020-10-24 14:18:04,359 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [743355293] [2020-10-24 14:18:04,359 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-24 14:18:04,502 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2020-10-24 14:18:04,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-24 14:18:04,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 44 conjunts are in the unsatisfiable core [2020-10-24 14:18:04,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-24 14:18:04,554 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 0 proven. 1764 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 14:18:04,554 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-24 14:18:04,555 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 46 [2020-10-24 14:18:04,555 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656918954] [2020-10-24 14:18:04,555 INFO L461 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-10-24 14:18:04,555 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-24 14:18:04,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-10-24 14:18:04,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2020-10-24 14:18:04,557 INFO L87 Difference]: Start difference. First operand 91 states and 91 transitions. Second operand 46 states. [2020-10-24 14:18:04,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 14:18:04,748 INFO L93 Difference]: Finished difference Result 98 states and 98 transitions. [2020-10-24 14:18:04,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-24 14:18:04,750 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 90 [2020-10-24 14:18:04,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 14:18:04,751 INFO L225 Difference]: With dead ends: 98 [2020-10-24 14:18:04,752 INFO L226 Difference]: Without dead ends: 94 [2020-10-24 14:18:04,752 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2020-10-24 14:18:04,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-10-24 14:18:04,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 93. [2020-10-24 14:18:04,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-24 14:18:04,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 93 transitions. [2020-10-24 14:18:04,756 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 93 transitions. Word has length 90 [2020-10-24 14:18:04,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 14:18:04,757 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 93 transitions. [2020-10-24 14:18:04,757 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-10-24 14:18:04,757 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 93 transitions. [2020-10-24 14:18:04,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-10-24 14:18:04,758 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 14:18:04,758 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 1, 1, 1, 1, 1, 1] [2020-10-24 14:18:04,969 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-24 14:18:04,970 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 14:18:04,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 14:18:04,970 INFO L82 PathProgramCache]: Analyzing trace with hash 3354371, now seen corresponding path program 43 times [2020-10-24 14:18:04,971 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-24 14:18:04,971 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877891941] [2020-10-24 14:18:04,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 14:18:04,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 14:18:06,466 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 0 proven. 1849 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 14:18:06,466 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877891941] [2020-10-24 14:18:06,466 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1378025098] [2020-10-24 14:18:06,466 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-24 14:18:06,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 14:18:06,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 45 conjunts are in the unsatisfiable core [2020-10-24 14:18:06,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-24 14:18:06,608 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 0 proven. 1849 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 14:18:06,609 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-24 14:18:06,609 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 47 [2020-10-24 14:18:06,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914537164] [2020-10-24 14:18:06,610 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-10-24 14:18:06,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-24 14:18:06,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-10-24 14:18:06,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2020-10-24 14:18:06,611 INFO L87 Difference]: Start difference. First operand 93 states and 93 transitions. Second operand 47 states. [2020-10-24 14:18:06,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 14:18:06,805 INFO L93 Difference]: Finished difference Result 100 states and 100 transitions. [2020-10-24 14:18:06,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-24 14:18:06,806 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 92 [2020-10-24 14:18:06,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 14:18:06,807 INFO L225 Difference]: With dead ends: 100 [2020-10-24 14:18:06,807 INFO L226 Difference]: Without dead ends: 96 [2020-10-24 14:18:06,807 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2020-10-24 14:18:06,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-24 14:18:06,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 95. [2020-10-24 14:18:06,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-10-24 14:18:06,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 95 transitions. [2020-10-24 14:18:06,812 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 95 transitions. Word has length 92 [2020-10-24 14:18:06,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 14:18:06,813 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 95 transitions. [2020-10-24 14:18:06,813 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-10-24 14:18:06,813 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 95 transitions. [2020-10-24 14:18:06,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-10-24 14:18:06,816 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 14:18:06,817 INFO L422 BasicCegarLoop]: trace histogram [44, 44, 1, 1, 1, 1, 1, 1] [2020-10-24 14:18:07,017 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-24 14:18:07,018 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 14:18:07,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 14:18:07,018 INFO L82 PathProgramCache]: Analyzing trace with hash -1018184443, now seen corresponding path program 44 times [2020-10-24 14:18:07,019 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-24 14:18:07,019 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947011508] [2020-10-24 14:18:07,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 14:18:07,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 14:18:08,544 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 0 proven. 1936 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 14:18:08,544 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947011508] [2020-10-24 14:18:08,544 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1271548142] [2020-10-24 14:18:08,544 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-24 14:18:08,646 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-24 14:18:08,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-24 14:18:08,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 46 conjunts are in the unsatisfiable core [2020-10-24 14:18:08,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-24 14:18:08,707 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 0 proven. 1936 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 14:18:08,708 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-24 14:18:08,708 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 48 [2020-10-24 14:18:08,708 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803719178] [2020-10-24 14:18:08,709 INFO L461 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-10-24 14:18:08,709 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-24 14:18:08,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-10-24 14:18:08,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2020-10-24 14:18:08,710 INFO L87 Difference]: Start difference. First operand 95 states and 95 transitions. Second operand 48 states. [2020-10-24 14:18:08,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 14:18:08,933 INFO L93 Difference]: Finished difference Result 102 states and 102 transitions. [2020-10-24 14:18:08,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-24 14:18:08,936 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 94 [2020-10-24 14:18:08,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 14:18:08,937 INFO L225 Difference]: With dead ends: 102 [2020-10-24 14:18:08,938 INFO L226 Difference]: Without dead ends: 98 [2020-10-24 14:18:08,938 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2020-10-24 14:18:08,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-24 14:18:08,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 97. [2020-10-24 14:18:08,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-24 14:18:08,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 97 transitions. [2020-10-24 14:18:08,942 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 97 transitions. Word has length 94 [2020-10-24 14:18:08,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 14:18:08,942 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 97 transitions. [2020-10-24 14:18:08,942 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-10-24 14:18:08,942 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 97 transitions. [2020-10-24 14:18:08,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-10-24 14:18:08,943 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 14:18:08,943 INFO L422 BasicCegarLoop]: trace histogram [45, 45, 1, 1, 1, 1, 1, 1] [2020-10-24 14:18:09,153 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2020-10-24 14:18:09,154 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 14:18:09,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 14:18:09,154 INFO L82 PathProgramCache]: Analyzing trace with hash 830526087, now seen corresponding path program 45 times [2020-10-24 14:18:09,155 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-24 14:18:09,155 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147120092] [2020-10-24 14:18:09,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 14:18:09,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 14:18:10,819 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 0 proven. 2025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 14:18:10,819 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147120092] [2020-10-24 14:18:10,819 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1824640694] [2020-10-24 14:18:10,819 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-24 14:18:10,969 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 46 check-sat command(s) [2020-10-24 14:18:10,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-24 14:18:10,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 47 conjunts are in the unsatisfiable core [2020-10-24 14:18:10,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-24 14:18:11,020 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 0 proven. 2025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 14:18:11,020 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-24 14:18:11,021 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 49 [2020-10-24 14:18:11,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479966355] [2020-10-24 14:18:11,021 INFO L461 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-10-24 14:18:11,021 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-24 14:18:11,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-10-24 14:18:11,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2020-10-24 14:18:11,023 INFO L87 Difference]: Start difference. First operand 97 states and 97 transitions. Second operand 49 states. [2020-10-24 14:18:11,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 14:18:11,209 INFO L93 Difference]: Finished difference Result 104 states and 104 transitions. [2020-10-24 14:18:11,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-10-24 14:18:11,210 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 96 [2020-10-24 14:18:11,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 14:18:11,211 INFO L225 Difference]: With dead ends: 104 [2020-10-24 14:18:11,211 INFO L226 Difference]: Without dead ends: 100 [2020-10-24 14:18:11,211 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2020-10-24 14:18:11,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-24 14:18:11,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 99. [2020-10-24 14:18:11,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-24 14:18:11,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 99 transitions. [2020-10-24 14:18:11,215 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 99 transitions. Word has length 96 [2020-10-24 14:18:11,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 14:18:11,216 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 99 transitions. [2020-10-24 14:18:11,216 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-10-24 14:18:11,216 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 99 transitions. [2020-10-24 14:18:11,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-10-24 14:18:11,216 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 14:18:11,217 INFO L422 BasicCegarLoop]: trace histogram [46, 46, 1, 1, 1, 1, 1, 1] [2020-10-24 14:18:11,428 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2020-10-24 14:18:11,428 INFO L429 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 14:18:11,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 14:18:11,429 INFO L82 PathProgramCache]: Analyzing trace with hash -675115127, now seen corresponding path program 46 times [2020-10-24 14:18:11,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-24 14:18:11,429 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080124374] [2020-10-24 14:18:11,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 14:18:11,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 14:18:13,153 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 14:18:13,153 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080124374] [2020-10-24 14:18:13,153 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1716977938] [2020-10-24 14:18:13,153 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-24 14:18:13,257 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-24 14:18:13,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-24 14:18:13,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 48 conjunts are in the unsatisfiable core [2020-10-24 14:18:13,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-24 14:18:13,308 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 14:18:13,309 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-24 14:18:13,309 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 50 [2020-10-24 14:18:13,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279311914] [2020-10-24 14:18:13,310 INFO L461 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-10-24 14:18:13,310 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-24 14:18:13,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-10-24 14:18:13,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2020-10-24 14:18:13,311 INFO L87 Difference]: Start difference. First operand 99 states and 99 transitions. Second operand 50 states. [2020-10-24 14:18:13,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 14:18:13,518 INFO L93 Difference]: Finished difference Result 106 states and 106 transitions. [2020-10-24 14:18:13,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-10-24 14:18:13,519 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 98 [2020-10-24 14:18:13,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 14:18:13,521 INFO L225 Difference]: With dead ends: 106 [2020-10-24 14:18:13,521 INFO L226 Difference]: Without dead ends: 102 [2020-10-24 14:18:13,522 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2020-10-24 14:18:13,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-24 14:18:13,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 101. [2020-10-24 14:18:13,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-24 14:18:13,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 101 transitions. [2020-10-24 14:18:13,525 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 101 transitions. Word has length 98 [2020-10-24 14:18:13,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 14:18:13,526 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 101 transitions. [2020-10-24 14:18:13,526 INFO L482 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-10-24 14:18:13,526 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 101 transitions. [2020-10-24 14:18:13,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-10-24 14:18:13,527 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 14:18:13,527 INFO L422 BasicCegarLoop]: trace histogram [47, 47, 1, 1, 1, 1, 1, 1] [2020-10-24 14:18:13,737 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2020-10-24 14:18:13,738 INFO L429 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 14:18:13,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 14:18:13,738 INFO L82 PathProgramCache]: Analyzing trace with hash -192343029, now seen corresponding path program 47 times [2020-10-24 14:18:13,739 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-24 14:18:13,739 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010374327] [2020-10-24 14:18:13,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 14:18:13,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 14:18:15,510 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 0 proven. 2209 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 14:18:15,511 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010374327] [2020-10-24 14:18:15,511 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [755880285] [2020-10-24 14:18:15,511 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-24 14:18:15,639 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 48 check-sat command(s) [2020-10-24 14:18:15,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-24 14:18:15,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 49 conjunts are in the unsatisfiable core [2020-10-24 14:18:15,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-24 14:18:15,681 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 0 proven. 2209 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 14:18:15,681 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-24 14:18:15,682 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 51 [2020-10-24 14:18:15,682 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697332096] [2020-10-24 14:18:15,682 INFO L461 AbstractCegarLoop]: Interpolant automaton has 51 states [2020-10-24 14:18:15,682 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-24 14:18:15,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2020-10-24 14:18:15,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2020-10-24 14:18:15,683 INFO L87 Difference]: Start difference. First operand 101 states and 101 transitions. Second operand 51 states. [2020-10-24 14:18:15,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 14:18:15,898 INFO L93 Difference]: Finished difference Result 108 states and 108 transitions. [2020-10-24 14:18:15,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-10-24 14:18:15,899 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 100 [2020-10-24 14:18:15,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 14:18:15,900 INFO L225 Difference]: With dead ends: 108 [2020-10-24 14:18:15,900 INFO L226 Difference]: Without dead ends: 104 [2020-10-24 14:18:15,901 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2020-10-24 14:18:15,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-10-24 14:18:15,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 103. [2020-10-24 14:18:15,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-10-24 14:18:15,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 103 transitions. [2020-10-24 14:18:15,907 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 103 transitions. Word has length 100 [2020-10-24 14:18:15,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 14:18:15,908 INFO L481 AbstractCegarLoop]: Abstraction has 103 states and 103 transitions. [2020-10-24 14:18:15,908 INFO L482 AbstractCegarLoop]: Interpolant automaton has 51 states. [2020-10-24 14:18:15,908 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 103 transitions. [2020-10-24 14:18:15,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-10-24 14:18:15,908 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 14:18:15,908 INFO L422 BasicCegarLoop]: trace histogram [48, 48, 1, 1, 1, 1, 1, 1] [2020-10-24 14:18:16,109 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-24 14:18:16,109 INFO L429 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 14:18:16,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 14:18:16,110 INFO L82 PathProgramCache]: Analyzing trace with hash -104824819, now seen corresponding path program 48 times [2020-10-24 14:18:16,110 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-24 14:18:16,111 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970525284] [2020-10-24 14:18:16,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 14:18:16,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 14:18:17,937 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 14:18:17,937 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970525284] [2020-10-24 14:18:17,937 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1667287037] [2020-10-24 14:18:17,937 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-24 14:18:18,080 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 49 check-sat command(s) [2020-10-24 14:18:18,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-24 14:18:18,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 50 conjunts are in the unsatisfiable core [2020-10-24 14:18:18,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-24 14:18:18,131 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 14:18:18,132 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-24 14:18:18,132 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 52 [2020-10-24 14:18:18,132 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247313117] [2020-10-24 14:18:18,133 INFO L461 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-10-24 14:18:18,133 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-24 14:18:18,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-10-24 14:18:18,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2020-10-24 14:18:18,134 INFO L87 Difference]: Start difference. First operand 103 states and 103 transitions. Second operand 52 states. [2020-10-24 14:18:18,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 14:18:18,375 INFO L93 Difference]: Finished difference Result 110 states and 110 transitions. [2020-10-24 14:18:18,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-10-24 14:18:18,376 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 102 [2020-10-24 14:18:18,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 14:18:18,377 INFO L225 Difference]: With dead ends: 110 [2020-10-24 14:18:18,377 INFO L226 Difference]: Without dead ends: 106 [2020-10-24 14:18:18,378 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2020-10-24 14:18:18,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-24 14:18:18,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 105. [2020-10-24 14:18:18,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-24 14:18:18,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 105 transitions. [2020-10-24 14:18:18,382 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 105 transitions. Word has length 102 [2020-10-24 14:18:18,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 14:18:18,382 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 105 transitions. [2020-10-24 14:18:18,382 INFO L482 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-10-24 14:18:18,382 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 105 transitions. [2020-10-24 14:18:18,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-10-24 14:18:18,383 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 14:18:18,383 INFO L422 BasicCegarLoop]: trace histogram [49, 49, 1, 1, 1, 1, 1, 1] [2020-10-24 14:18:18,593 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2020-10-24 14:18:18,594 INFO L429 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 14:18:18,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 14:18:18,594 INFO L82 PathProgramCache]: Analyzing trace with hash -1899170929, now seen corresponding path program 49 times [2020-10-24 14:18:18,595 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-24 14:18:18,595 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531281570] [2020-10-24 14:18:18,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 14:18:18,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 14:18:20,538 INFO L134 CoverageAnalysis]: Checked inductivity of 2401 backedges. 0 proven. 2401 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 14:18:20,538 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531281570] [2020-10-24 14:18:20,538 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [735321654] [2020-10-24 14:18:20,538 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-24 14:18:20,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 14:18:20,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 384 conjuncts, 51 conjunts are in the unsatisfiable core [2020-10-24 14:18:20,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-24 14:18:20,695 INFO L134 CoverageAnalysis]: Checked inductivity of 2401 backedges. 0 proven. 2401 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 14:18:20,695 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-24 14:18:20,696 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 53 [2020-10-24 14:18:20,696 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739301068] [2020-10-24 14:18:20,696 INFO L461 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-10-24 14:18:20,697 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-24 14:18:20,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-10-24 14:18:20,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2020-10-24 14:18:20,698 INFO L87 Difference]: Start difference. First operand 105 states and 105 transitions. Second operand 53 states. [2020-10-24 14:18:20,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 14:18:20,948 INFO L93 Difference]: Finished difference Result 112 states and 112 transitions. [2020-10-24 14:18:20,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-10-24 14:18:20,949 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 104 [2020-10-24 14:18:20,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 14:18:20,950 INFO L225 Difference]: With dead ends: 112 [2020-10-24 14:18:20,950 INFO L226 Difference]: Without dead ends: 108 [2020-10-24 14:18:20,950 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2020-10-24 14:18:20,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-10-24 14:18:20,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 107. [2020-10-24 14:18:20,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-10-24 14:18:20,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 107 transitions. [2020-10-24 14:18:20,954 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 107 transitions. Word has length 104 [2020-10-24 14:18:20,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 14:18:20,954 INFO L481 AbstractCegarLoop]: Abstraction has 107 states and 107 transitions. [2020-10-24 14:18:20,954 INFO L482 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-10-24 14:18:20,955 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 107 transitions. [2020-10-24 14:18:20,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-10-24 14:18:20,955 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 14:18:20,955 INFO L422 BasicCegarLoop]: trace histogram [50, 50, 1, 1, 1, 1, 1, 1] [2020-10-24 14:18:21,167 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2020-10-24 14:18:21,168 INFO L429 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 14:18:21,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 14:18:21,169 INFO L82 PathProgramCache]: Analyzing trace with hash 311070353, now seen corresponding path program 50 times [2020-10-24 14:18:21,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-24 14:18:21,169 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300391837] [2020-10-24 14:18:21,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 14:18:21,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 14:18:23,276 INFO L134 CoverageAnalysis]: Checked inductivity of 2500 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 14:18:23,277 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300391837] [2020-10-24 14:18:23,277 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [761607580] [2020-10-24 14:18:23,277 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-24 14:18:23,385 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-24 14:18:23,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-24 14:18:23,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 52 conjunts are in the unsatisfiable core [2020-10-24 14:18:23,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-24 14:18:23,440 INFO L134 CoverageAnalysis]: Checked inductivity of 2500 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 14:18:23,440 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-24 14:18:23,440 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 54 [2020-10-24 14:18:23,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789258876] [2020-10-24 14:18:23,441 INFO L461 AbstractCegarLoop]: Interpolant automaton has 54 states [2020-10-24 14:18:23,441 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-24 14:18:23,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2020-10-24 14:18:23,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2020-10-24 14:18:23,443 INFO L87 Difference]: Start difference. First operand 107 states and 107 transitions. Second operand 54 states. [2020-10-24 14:18:23,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 14:18:23,718 INFO L93 Difference]: Finished difference Result 114 states and 114 transitions. [2020-10-24 14:18:23,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-10-24 14:18:23,719 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 106 [2020-10-24 14:18:23,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 14:18:23,720 INFO L225 Difference]: With dead ends: 114 [2020-10-24 14:18:23,721 INFO L226 Difference]: Without dead ends: 110 [2020-10-24 14:18:23,721 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2020-10-24 14:18:23,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-10-24 14:18:23,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 109. [2020-10-24 14:18:23,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-10-24 14:18:23,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 109 transitions. [2020-10-24 14:18:23,725 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 109 transitions. Word has length 106 [2020-10-24 14:18:23,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 14:18:23,725 INFO L481 AbstractCegarLoop]: Abstraction has 109 states and 109 transitions. [2020-10-24 14:18:23,725 INFO L482 AbstractCegarLoop]: Interpolant automaton has 54 states. [2020-10-24 14:18:23,725 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 109 transitions. [2020-10-24 14:18:23,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-10-24 14:18:23,726 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 14:18:23,726 INFO L422 BasicCegarLoop]: trace histogram [51, 51, 1, 1, 1, 1, 1, 1] [2020-10-24 14:18:23,936 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-24 14:18:23,937 INFO L429 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 14:18:23,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 14:18:23,937 INFO L82 PathProgramCache]: Analyzing trace with hash -1655869165, now seen corresponding path program 51 times [2020-10-24 14:18:23,938 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-24 14:18:23,938 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140259728] [2020-10-24 14:18:23,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 14:18:23,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 14:18:25,904 INFO L134 CoverageAnalysis]: Checked inductivity of 2601 backedges. 0 proven. 2601 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 14:18:25,904 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140259728] [2020-10-24 14:18:25,904 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [451435460] [2020-10-24 14:18:25,904 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-24 14:18:26,066 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 52 check-sat command(s) [2020-10-24 14:18:26,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-24 14:18:26,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 398 conjuncts, 53 conjunts are in the unsatisfiable core [2020-10-24 14:18:26,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-24 14:18:26,116 INFO L134 CoverageAnalysis]: Checked inductivity of 2601 backedges. 0 proven. 2601 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 14:18:26,117 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-24 14:18:26,118 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 55 [2020-10-24 14:18:26,118 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549751448] [2020-10-24 14:18:26,119 INFO L461 AbstractCegarLoop]: Interpolant automaton has 55 states [2020-10-24 14:18:26,119 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-24 14:18:26,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2020-10-24 14:18:26,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2020-10-24 14:18:26,120 INFO L87 Difference]: Start difference. First operand 109 states and 109 transitions. Second operand 55 states. [2020-10-24 14:18:26,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 14:18:26,353 INFO L93 Difference]: Finished difference Result 116 states and 116 transitions. [2020-10-24 14:18:26,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-10-24 14:18:26,357 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 108 [2020-10-24 14:18:26,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 14:18:26,358 INFO L225 Difference]: With dead ends: 116 [2020-10-24 14:18:26,358 INFO L226 Difference]: Without dead ends: 112 [2020-10-24 14:18:26,358 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2020-10-24 14:18:26,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-24 14:18:26,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 111. [2020-10-24 14:18:26,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-10-24 14:18:26,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 111 transitions. [2020-10-24 14:18:26,362 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 111 transitions. Word has length 108 [2020-10-24 14:18:26,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 14:18:26,363 INFO L481 AbstractCegarLoop]: Abstraction has 111 states and 111 transitions. [2020-10-24 14:18:26,363 INFO L482 AbstractCegarLoop]: Interpolant automaton has 55 states. [2020-10-24 14:18:26,363 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 111 transitions. [2020-10-24 14:18:26,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-10-24 14:18:26,363 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 14:18:26,364 INFO L422 BasicCegarLoop]: trace histogram [52, 52, 1, 1, 1, 1, 1, 1] [2020-10-24 14:18:26,568 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2020-10-24 14:18:26,569 INFO L429 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 14:18:26,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 14:18:26,570 INFO L82 PathProgramCache]: Analyzing trace with hash -2099135723, now seen corresponding path program 52 times [2020-10-24 14:18:26,570 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-24 14:18:26,570 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709932745] [2020-10-24 14:18:26,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 14:18:26,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 14:18:28,772 INFO L134 CoverageAnalysis]: Checked inductivity of 2704 backedges. 0 proven. 2704 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 14:18:28,772 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709932745] [2020-10-24 14:18:28,772 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1748969792] [2020-10-24 14:18:28,773 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-24 14:18:28,891 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-24 14:18:28,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-24 14:18:28,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 405 conjuncts, 54 conjunts are in the unsatisfiable core [2020-10-24 14:18:28,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-24 14:18:28,932 INFO L134 CoverageAnalysis]: Checked inductivity of 2704 backedges. 0 proven. 2704 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 14:18:28,932 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-24 14:18:28,932 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 56 [2020-10-24 14:18:28,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066977834] [2020-10-24 14:18:28,933 INFO L461 AbstractCegarLoop]: Interpolant automaton has 56 states [2020-10-24 14:18:28,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-24 14:18:28,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2020-10-24 14:18:28,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2020-10-24 14:18:28,934 INFO L87 Difference]: Start difference. First operand 111 states and 111 transitions. Second operand 56 states. [2020-10-24 14:18:29,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 14:18:29,195 INFO L93 Difference]: Finished difference Result 118 states and 118 transitions. [2020-10-24 14:18:29,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-10-24 14:18:29,196 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 110 [2020-10-24 14:18:29,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 14:18:29,197 INFO L225 Difference]: With dead ends: 118 [2020-10-24 14:18:29,197 INFO L226 Difference]: Without dead ends: 114 [2020-10-24 14:18:29,197 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2020-10-24 14:18:29,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-10-24 14:18:29,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 113. [2020-10-24 14:18:29,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-10-24 14:18:29,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 113 transitions. [2020-10-24 14:18:29,201 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 113 transitions. Word has length 110 [2020-10-24 14:18:29,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 14:18:29,201 INFO L481 AbstractCegarLoop]: Abstraction has 113 states and 113 transitions. [2020-10-24 14:18:29,201 INFO L482 AbstractCegarLoop]: Interpolant automaton has 56 states. [2020-10-24 14:18:29,202 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 113 transitions. [2020-10-24 14:18:29,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-10-24 14:18:29,202 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 14:18:29,202 INFO L422 BasicCegarLoop]: trace histogram [53, 53, 1, 1, 1, 1, 1, 1] [2020-10-24 14:18:29,413 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-24 14:18:29,413 INFO L429 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 14:18:29,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 14:18:29,414 INFO L82 PathProgramCache]: Analyzing trace with hash 1418431639, now seen corresponding path program 53 times [2020-10-24 14:18:29,414 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-24 14:18:29,414 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438148745] [2020-10-24 14:18:29,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 14:18:29,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 14:18:31,599 INFO L134 CoverageAnalysis]: Checked inductivity of 2809 backedges. 0 proven. 2809 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 14:18:31,599 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438148745] [2020-10-24 14:18:31,599 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [480232525] [2020-10-24 14:18:31,600 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-24 14:18:31,739 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 54 check-sat command(s) [2020-10-24 14:18:31,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-24 14:18:31,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 412 conjuncts, 55 conjunts are in the unsatisfiable core [2020-10-24 14:18:31,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-24 14:18:31,793 INFO L134 CoverageAnalysis]: Checked inductivity of 2809 backedges. 0 proven. 2809 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 14:18:31,794 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-24 14:18:31,794 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 57 [2020-10-24 14:18:31,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147138702] [2020-10-24 14:18:31,795 INFO L461 AbstractCegarLoop]: Interpolant automaton has 57 states [2020-10-24 14:18:31,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-24 14:18:31,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2020-10-24 14:18:31,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2020-10-24 14:18:31,796 INFO L87 Difference]: Start difference. First operand 113 states and 113 transitions. Second operand 57 states. [2020-10-24 14:18:32,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 14:18:32,085 INFO L93 Difference]: Finished difference Result 120 states and 120 transitions. [2020-10-24 14:18:32,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-10-24 14:18:32,086 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 112 [2020-10-24 14:18:32,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 14:18:32,087 INFO L225 Difference]: With dead ends: 120 [2020-10-24 14:18:32,087 INFO L226 Difference]: Without dead ends: 116 [2020-10-24 14:18:32,087 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2020-10-24 14:18:32,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-10-24 14:18:32,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 115. [2020-10-24 14:18:32,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-10-24 14:18:32,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 115 transitions. [2020-10-24 14:18:32,091 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 115 transitions. Word has length 112 [2020-10-24 14:18:32,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 14:18:32,092 INFO L481 AbstractCegarLoop]: Abstraction has 115 states and 115 transitions. [2020-10-24 14:18:32,092 INFO L482 AbstractCegarLoop]: Interpolant automaton has 57 states. [2020-10-24 14:18:32,092 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 115 transitions. [2020-10-24 14:18:32,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-10-24 14:18:32,093 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 14:18:32,093 INFO L422 BasicCegarLoop]: trace histogram [54, 54, 1, 1, 1, 1, 1, 1] [2020-10-24 14:18:32,303 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2020-10-24 14:18:32,304 INFO L429 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 14:18:32,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 14:18:32,304 INFO L82 PathProgramCache]: Analyzing trace with hash 1661404569, now seen corresponding path program 54 times [2020-10-24 14:18:32,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-24 14:18:32,305 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511016949] [2020-10-24 14:18:32,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 14:18:32,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 14:18:34,625 INFO L134 CoverageAnalysis]: Checked inductivity of 2916 backedges. 0 proven. 2916 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 14:18:34,625 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511016949] [2020-10-24 14:18:34,625 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512621349] [2020-10-24 14:18:34,625 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-24 14:18:34,826 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 55 check-sat command(s) [2020-10-24 14:18:34,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-24 14:18:34,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 419 conjuncts, 56 conjunts are in the unsatisfiable core [2020-10-24 14:18:34,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-24 14:18:34,882 INFO L134 CoverageAnalysis]: Checked inductivity of 2916 backedges. 0 proven. 2916 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 14:18:34,882 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-24 14:18:34,882 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 58 [2020-10-24 14:18:34,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695744448] [2020-10-24 14:18:34,883 INFO L461 AbstractCegarLoop]: Interpolant automaton has 58 states [2020-10-24 14:18:34,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-24 14:18:34,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2020-10-24 14:18:34,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2020-10-24 14:18:34,885 INFO L87 Difference]: Start difference. First operand 115 states and 115 transitions. Second operand 58 states. [2020-10-24 14:18:35,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 14:18:35,149 INFO L93 Difference]: Finished difference Result 122 states and 122 transitions. [2020-10-24 14:18:35,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-10-24 14:18:35,150 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 114 [2020-10-24 14:18:35,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 14:18:35,151 INFO L225 Difference]: With dead ends: 122 [2020-10-24 14:18:35,152 INFO L226 Difference]: Without dead ends: 118 [2020-10-24 14:18:35,152 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2020-10-24 14:18:35,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-24 14:18:35,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 117. [2020-10-24 14:18:35,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-10-24 14:18:35,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 117 transitions. [2020-10-24 14:18:35,157 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 117 transitions. Word has length 114 [2020-10-24 14:18:35,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 14:18:35,158 INFO L481 AbstractCegarLoop]: Abstraction has 117 states and 117 transitions. [2020-10-24 14:18:35,158 INFO L482 AbstractCegarLoop]: Interpolant automaton has 58 states. [2020-10-24 14:18:35,158 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 117 transitions. [2020-10-24 14:18:35,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-10-24 14:18:35,159 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 14:18:35,159 INFO L422 BasicCegarLoop]: trace histogram [55, 55, 1, 1, 1, 1, 1, 1] [2020-10-24 14:18:35,370 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2020-10-24 14:18:35,371 INFO L429 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 14:18:35,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 14:18:35,371 INFO L82 PathProgramCache]: Analyzing trace with hash -1064810981, now seen corresponding path program 55 times [2020-10-24 14:18:35,372 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-24 14:18:35,372 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251740408] [2020-10-24 14:18:35,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 14:18:35,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 14:18:37,691 INFO L134 CoverageAnalysis]: Checked inductivity of 3025 backedges. 0 proven. 3025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 14:18:37,691 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251740408] [2020-10-24 14:18:37,691 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1026885563] [2020-10-24 14:18:37,691 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-24 14:18:37,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 14:18:37,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 426 conjuncts, 57 conjunts are in the unsatisfiable core [2020-10-24 14:18:37,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-24 14:18:37,876 INFO L134 CoverageAnalysis]: Checked inductivity of 3025 backedges. 0 proven. 3025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 14:18:37,877 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-24 14:18:37,877 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 59 [2020-10-24 14:18:37,877 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723176779] [2020-10-24 14:18:37,878 INFO L461 AbstractCegarLoop]: Interpolant automaton has 59 states [2020-10-24 14:18:37,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-24 14:18:37,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2020-10-24 14:18:37,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2020-10-24 14:18:37,880 INFO L87 Difference]: Start difference. First operand 117 states and 117 transitions. Second operand 59 states. [2020-10-24 14:18:38,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 14:18:38,098 INFO L93 Difference]: Finished difference Result 124 states and 124 transitions. [2020-10-24 14:18:38,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2020-10-24 14:18:38,098 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 116 [2020-10-24 14:18:38,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 14:18:38,099 INFO L225 Difference]: With dead ends: 124 [2020-10-24 14:18:38,100 INFO L226 Difference]: Without dead ends: 120 [2020-10-24 14:18:38,100 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2020-10-24 14:18:38,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-10-24 14:18:38,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 119. [2020-10-24 14:18:38,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-10-24 14:18:38,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 119 transitions. [2020-10-24 14:18:38,105 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 119 transitions. Word has length 116 [2020-10-24 14:18:38,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 14:18:38,105 INFO L481 AbstractCegarLoop]: Abstraction has 119 states and 119 transitions. [2020-10-24 14:18:38,105 INFO L482 AbstractCegarLoop]: Interpolant automaton has 59 states. [2020-10-24 14:18:38,106 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 119 transitions. [2020-10-24 14:18:38,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2020-10-24 14:18:38,106 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 14:18:38,107 INFO L422 BasicCegarLoop]: trace histogram [56, 56, 1, 1, 1, 1, 1, 1] [2020-10-24 14:18:38,318 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-24 14:18:38,318 INFO L429 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 14:18:38,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 14:18:38,319 INFO L82 PathProgramCache]: Analyzing trace with hash -1027903971, now seen corresponding path program 56 times [2020-10-24 14:18:38,319 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-24 14:18:38,319 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476936672] [2020-10-24 14:18:38,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 14:18:38,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 14:18:40,672 INFO L134 CoverageAnalysis]: Checked inductivity of 3136 backedges. 0 proven. 3136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 14:18:40,672 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476936672] [2020-10-24 14:18:40,673 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [218508309] [2020-10-24 14:18:40,673 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-24 14:18:40,791 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-24 14:18:40,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-24 14:18:40,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 433 conjuncts, 58 conjunts are in the unsatisfiable core [2020-10-24 14:18:40,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-24 14:18:40,851 INFO L134 CoverageAnalysis]: Checked inductivity of 3136 backedges. 0 proven. 3136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 14:18:40,852 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-24 14:18:40,852 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 60 [2020-10-24 14:18:40,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880280686] [2020-10-24 14:18:40,853 INFO L461 AbstractCegarLoop]: Interpolant automaton has 60 states [2020-10-24 14:18:40,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-24 14:18:40,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2020-10-24 14:18:40,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2020-10-24 14:18:40,855 INFO L87 Difference]: Start difference. First operand 119 states and 119 transitions. Second operand 60 states. [2020-10-24 14:18:41,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 14:18:41,120 INFO L93 Difference]: Finished difference Result 126 states and 126 transitions. [2020-10-24 14:18:41,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2020-10-24 14:18:41,121 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 118 [2020-10-24 14:18:41,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 14:18:41,122 INFO L225 Difference]: With dead ends: 126 [2020-10-24 14:18:41,122 INFO L226 Difference]: Without dead ends: 122 [2020-10-24 14:18:41,123 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2020-10-24 14:18:41,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-10-24 14:18:41,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 121. [2020-10-24 14:18:41,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-24 14:18:41,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 121 transitions. [2020-10-24 14:18:41,127 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 121 transitions. Word has length 118 [2020-10-24 14:18:41,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 14:18:41,128 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 121 transitions. [2020-10-24 14:18:41,128 INFO L482 AbstractCegarLoop]: Interpolant automaton has 60 states. [2020-10-24 14:18:41,128 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 121 transitions. [2020-10-24 14:18:41,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2020-10-24 14:18:41,129 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 14:18:41,129 INFO L422 BasicCegarLoop]: trace histogram [57, 57, 1, 1, 1, 1, 1, 1] [2020-10-24 14:18:41,340 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2020-10-24 14:18:41,341 INFO L429 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 14:18:41,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 14:18:41,341 INFO L82 PathProgramCache]: Analyzing trace with hash 79994271, now seen corresponding path program 57 times [2020-10-24 14:18:41,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-24 14:18:41,342 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944081125] [2020-10-24 14:18:41,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 14:18:41,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 14:18:43,929 INFO L134 CoverageAnalysis]: Checked inductivity of 3249 backedges. 0 proven. 3249 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 14:18:43,929 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944081125] [2020-10-24 14:18:43,929 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [286018773] [2020-10-24 14:18:43,929 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-24 14:18:44,110 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 58 check-sat command(s) [2020-10-24 14:18:44,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-24 14:18:44,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 440 conjuncts, 59 conjunts are in the unsatisfiable core [2020-10-24 14:18:44,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-24 14:18:44,175 INFO L134 CoverageAnalysis]: Checked inductivity of 3249 backedges. 0 proven. 3249 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 14:18:44,176 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-24 14:18:44,176 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 61 [2020-10-24 14:18:44,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957812968] [2020-10-24 14:18:44,177 INFO L461 AbstractCegarLoop]: Interpolant automaton has 61 states [2020-10-24 14:18:44,177 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-24 14:18:44,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2020-10-24 14:18:44,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2020-10-24 14:18:44,178 INFO L87 Difference]: Start difference. First operand 121 states and 121 transitions. Second operand 61 states. [2020-10-24 14:18:44,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 14:18:44,426 INFO L93 Difference]: Finished difference Result 128 states and 128 transitions. [2020-10-24 14:18:44,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2020-10-24 14:18:44,426 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 120 [2020-10-24 14:18:44,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 14:18:44,427 INFO L225 Difference]: With dead ends: 128 [2020-10-24 14:18:44,428 INFO L226 Difference]: Without dead ends: 124 [2020-10-24 14:18:44,428 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2020-10-24 14:18:44,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-10-24 14:18:44,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 123. [2020-10-24 14:18:44,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-10-24 14:18:44,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 123 transitions. [2020-10-24 14:18:44,432 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 123 transitions. Word has length 120 [2020-10-24 14:18:44,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 14:18:44,433 INFO L481 AbstractCegarLoop]: Abstraction has 123 states and 123 transitions. [2020-10-24 14:18:44,433 INFO L482 AbstractCegarLoop]: Interpolant automaton has 61 states. [2020-10-24 14:18:44,433 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 123 transitions. [2020-10-24 14:18:44,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-10-24 14:18:44,434 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 14:18:44,434 INFO L422 BasicCegarLoop]: trace histogram [58, 58, 1, 1, 1, 1, 1, 1] [2020-10-24 14:18:44,645 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-24 14:18:44,646 INFO L429 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 14:18:44,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 14:18:44,646 INFO L82 PathProgramCache]: Analyzing trace with hash -381684575, now seen corresponding path program 58 times [2020-10-24 14:18:44,647 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-24 14:18:44,647 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334413580] [2020-10-24 14:18:44,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 14:18:44,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 14:18:47,318 INFO L134 CoverageAnalysis]: Checked inductivity of 3364 backedges. 0 proven. 3364 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 14:18:47,318 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334413580] [2020-10-24 14:18:47,318 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [323956172] [2020-10-24 14:18:47,318 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-24 14:18:47,438 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-24 14:18:47,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-24 14:18:47,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 447 conjuncts, 60 conjunts are in the unsatisfiable core [2020-10-24 14:18:47,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-24 14:18:47,503 INFO L134 CoverageAnalysis]: Checked inductivity of 3364 backedges. 0 proven. 3364 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 14:18:47,504 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-24 14:18:47,504 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 62 [2020-10-24 14:18:47,504 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320671760] [2020-10-24 14:18:47,505 INFO L461 AbstractCegarLoop]: Interpolant automaton has 62 states [2020-10-24 14:18:47,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-24 14:18:47,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2020-10-24 14:18:47,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2020-10-24 14:18:47,507 INFO L87 Difference]: Start difference. First operand 123 states and 123 transitions. Second operand 62 states. [2020-10-24 14:18:47,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 14:18:47,782 INFO L93 Difference]: Finished difference Result 130 states and 130 transitions. [2020-10-24 14:18:47,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2020-10-24 14:18:47,782 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 122 [2020-10-24 14:18:47,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 14:18:47,783 INFO L225 Difference]: With dead ends: 130 [2020-10-24 14:18:47,783 INFO L226 Difference]: Without dead ends: 126 [2020-10-24 14:18:47,784 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2020-10-24 14:18:47,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-10-24 14:18:47,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 125. [2020-10-24 14:18:47,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-10-24 14:18:47,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 125 transitions. [2020-10-24 14:18:47,788 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 125 transitions. Word has length 122 [2020-10-24 14:18:47,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 14:18:47,789 INFO L481 AbstractCegarLoop]: Abstraction has 125 states and 125 transitions. [2020-10-24 14:18:47,789 INFO L482 AbstractCegarLoop]: Interpolant automaton has 62 states. [2020-10-24 14:18:47,789 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 125 transitions. [2020-10-24 14:18:47,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-10-24 14:18:47,790 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 14:18:47,790 INFO L422 BasicCegarLoop]: trace histogram [59, 59, 1, 1, 1, 1, 1, 1] [2020-10-24 14:18:47,999 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2020-10-24 14:18:47,999 INFO L429 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 14:18:48,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 14:18:48,000 INFO L82 PathProgramCache]: Analyzing trace with hash -1673424093, now seen corresponding path program 59 times [2020-10-24 14:18:48,000 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-24 14:18:48,000 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089538194] [2020-10-24 14:18:48,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 14:18:48,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 14:18:50,735 INFO L134 CoverageAnalysis]: Checked inductivity of 3481 backedges. 0 proven. 3481 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 14:18:50,735 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089538194] [2020-10-24 14:18:50,735 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1706895907] [2020-10-24 14:18:50,735 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-24 14:18:50,906 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 60 check-sat command(s) [2020-10-24 14:18:50,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-24 14:18:50,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 454 conjuncts, 61 conjunts are in the unsatisfiable core [2020-10-24 14:18:50,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-24 14:18:50,961 INFO L134 CoverageAnalysis]: Checked inductivity of 3481 backedges. 0 proven. 3481 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 14:18:50,962 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-24 14:18:50,962 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62] total 63 [2020-10-24 14:18:50,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271377424] [2020-10-24 14:18:50,963 INFO L461 AbstractCegarLoop]: Interpolant automaton has 63 states [2020-10-24 14:18:50,963 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-24 14:18:50,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2020-10-24 14:18:50,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2020-10-24 14:18:50,964 INFO L87 Difference]: Start difference. First operand 125 states and 125 transitions. Second operand 63 states. [2020-10-24 14:18:51,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 14:18:51,275 INFO L93 Difference]: Finished difference Result 132 states and 132 transitions. [2020-10-24 14:18:51,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2020-10-24 14:18:51,275 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 124 [2020-10-24 14:18:51,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 14:18:51,276 INFO L225 Difference]: With dead ends: 132 [2020-10-24 14:18:51,276 INFO L226 Difference]: Without dead ends: 128 [2020-10-24 14:18:51,277 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2020-10-24 14:18:51,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-10-24 14:18:51,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 127. [2020-10-24 14:18:51,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-10-24 14:18:51,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 127 transitions. [2020-10-24 14:18:51,281 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 127 transitions. Word has length 124 [2020-10-24 14:18:51,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 14:18:51,281 INFO L481 AbstractCegarLoop]: Abstraction has 127 states and 127 transitions. [2020-10-24 14:18:51,282 INFO L482 AbstractCegarLoop]: Interpolant automaton has 63 states. [2020-10-24 14:18:51,282 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 127 transitions. [2020-10-24 14:18:51,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-10-24 14:18:51,283 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 14:18:51,283 INFO L422 BasicCegarLoop]: trace histogram [60, 60, 1, 1, 1, 1, 1, 1] [2020-10-24 14:18:51,493 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2020-10-24 14:18:51,493 INFO L429 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 14:18:51,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 14:18:51,495 INFO L82 PathProgramCache]: Analyzing trace with hash -1789552347, now seen corresponding path program 60 times [2020-10-24 14:18:51,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-24 14:18:51,495 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119235779] [2020-10-24 14:18:51,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 14:18:51,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 14:18:54,270 INFO L134 CoverageAnalysis]: Checked inductivity of 3600 backedges. 0 proven. 3600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 14:18:54,271 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119235779] [2020-10-24 14:18:54,271 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1618613489] [2020-10-24 14:18:54,271 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-24 14:18:54,464 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 61 check-sat command(s) [2020-10-24 14:18:54,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-24 14:18:54,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 461 conjuncts, 62 conjunts are in the unsatisfiable core [2020-10-24 14:18:54,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-24 14:18:54,529 INFO L134 CoverageAnalysis]: Checked inductivity of 3600 backedges. 0 proven. 3600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 14:18:54,529 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-24 14:18:54,530 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 64 [2020-10-24 14:18:54,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599827019] [2020-10-24 14:18:54,530 INFO L461 AbstractCegarLoop]: Interpolant automaton has 64 states [2020-10-24 14:18:54,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-24 14:18:54,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2020-10-24 14:18:54,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2020-10-24 14:18:54,532 INFO L87 Difference]: Start difference. First operand 127 states and 127 transitions. Second operand 64 states. [2020-10-24 14:18:54,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 14:18:54,852 INFO L93 Difference]: Finished difference Result 134 states and 134 transitions. [2020-10-24 14:18:54,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2020-10-24 14:18:54,853 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 126 [2020-10-24 14:18:54,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 14:18:54,854 INFO L225 Difference]: With dead ends: 134 [2020-10-24 14:18:54,854 INFO L226 Difference]: Without dead ends: 130 [2020-10-24 14:18:54,855 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2020-10-24 14:18:54,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-10-24 14:18:54,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 129. [2020-10-24 14:18:54,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-10-24 14:18:54,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 129 transitions. [2020-10-24 14:18:54,859 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 129 transitions. Word has length 126 [2020-10-24 14:18:54,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 14:18:54,860 INFO L481 AbstractCegarLoop]: Abstraction has 129 states and 129 transitions. [2020-10-24 14:18:54,860 INFO L482 AbstractCegarLoop]: Interpolant automaton has 64 states. [2020-10-24 14:18:54,860 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 129 transitions. [2020-10-24 14:18:54,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-10-24 14:18:54,861 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 14:18:54,861 INFO L422 BasicCegarLoop]: trace histogram [61, 61, 1, 1, 1, 1, 1, 1] [2020-10-24 14:18:55,073 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,61 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-24 14:18:55,074 INFO L429 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 14:18:55,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 14:18:55,074 INFO L82 PathProgramCache]: Analyzing trace with hash -1719654745, now seen corresponding path program 61 times [2020-10-24 14:18:55,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-24 14:18:55,075 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684823255] [2020-10-24 14:18:55,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 14:18:55,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 14:18:58,005 INFO L134 CoverageAnalysis]: Checked inductivity of 3721 backedges. 0 proven. 3721 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 14:18:58,006 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684823255] [2020-10-24 14:18:58,006 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1774110070] [2020-10-24 14:18:58,006 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-24 14:18:58,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 14:18:58,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 468 conjuncts, 63 conjunts are in the unsatisfiable core [2020-10-24 14:18:58,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-24 14:18:58,182 INFO L134 CoverageAnalysis]: Checked inductivity of 3721 backedges. 0 proven. 3721 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 14:18:58,183 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-24 14:18:58,183 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 65 [2020-10-24 14:18:58,183 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125849548] [2020-10-24 14:18:58,184 INFO L461 AbstractCegarLoop]: Interpolant automaton has 65 states [2020-10-24 14:18:58,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-24 14:18:58,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2020-10-24 14:18:58,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2020-10-24 14:18:58,186 INFO L87 Difference]: Start difference. First operand 129 states and 129 transitions. Second operand 65 states. [2020-10-24 14:18:58,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 14:18:58,470 INFO L93 Difference]: Finished difference Result 136 states and 136 transitions. [2020-10-24 14:18:58,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2020-10-24 14:18:58,471 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 128 [2020-10-24 14:18:58,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 14:18:58,472 INFO L225 Difference]: With dead ends: 136 [2020-10-24 14:18:58,472 INFO L226 Difference]: Without dead ends: 132 [2020-10-24 14:18:58,473 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2020-10-24 14:18:58,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-10-24 14:18:58,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 131. [2020-10-24 14:18:58,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-10-24 14:18:58,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 131 transitions. [2020-10-24 14:18:58,477 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 131 transitions. Word has length 128 [2020-10-24 14:18:58,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 14:18:58,478 INFO L481 AbstractCegarLoop]: Abstraction has 131 states and 131 transitions. [2020-10-24 14:18:58,478 INFO L482 AbstractCegarLoop]: Interpolant automaton has 65 states. [2020-10-24 14:18:58,478 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 131 transitions. [2020-10-24 14:18:58,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-10-24 14:18:58,479 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 14:18:58,479 INFO L422 BasicCegarLoop]: trace histogram [62, 62, 1, 1, 1, 1, 1, 1] [2020-10-24 14:18:58,689 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-24 14:18:58,690 INFO L429 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 14:18:58,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 14:18:58,690 INFO L82 PathProgramCache]: Analyzing trace with hash 1027431337, now seen corresponding path program 62 times [2020-10-24 14:18:58,691 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-24 14:18:58,691 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228417308] [2020-10-24 14:18:58,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 14:18:58,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 14:19:01,743 INFO L134 CoverageAnalysis]: Checked inductivity of 3844 backedges. 0 proven. 3844 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 14:19:01,744 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228417308] [2020-10-24 14:19:01,744 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99576257] [2020-10-24 14:19:01,744 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-24 14:19:01,871 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-24 14:19:01,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-24 14:19:01,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 475 conjuncts, 64 conjunts are in the unsatisfiable core [2020-10-24 14:19:01,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-24 14:19:01,914 INFO L134 CoverageAnalysis]: Checked inductivity of 3844 backedges. 0 proven. 3844 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 14:19:01,914 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-24 14:19:01,914 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 66 [2020-10-24 14:19:01,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21112214] [2020-10-24 14:19:01,915 INFO L461 AbstractCegarLoop]: Interpolant automaton has 66 states [2020-10-24 14:19:01,915 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-24 14:19:01,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2020-10-24 14:19:01,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2020-10-24 14:19:01,916 INFO L87 Difference]: Start difference. First operand 131 states and 131 transitions. Second operand 66 states. [2020-10-24 14:19:02,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 14:19:02,243 INFO L93 Difference]: Finished difference Result 138 states and 138 transitions. [2020-10-24 14:19:02,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2020-10-24 14:19:02,244 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 130 [2020-10-24 14:19:02,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 14:19:02,245 INFO L225 Difference]: With dead ends: 138 [2020-10-24 14:19:02,246 INFO L226 Difference]: Without dead ends: 134 [2020-10-24 14:19:02,246 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2020-10-24 14:19:02,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-10-24 14:19:02,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 133. [2020-10-24 14:19:02,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-10-24 14:19:02,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 133 transitions. [2020-10-24 14:19:02,250 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 133 transitions. Word has length 130 [2020-10-24 14:19:02,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 14:19:02,251 INFO L481 AbstractCegarLoop]: Abstraction has 133 states and 133 transitions. [2020-10-24 14:19:02,251 INFO L482 AbstractCegarLoop]: Interpolant automaton has 66 states. [2020-10-24 14:19:02,251 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 133 transitions. [2020-10-24 14:19:02,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2020-10-24 14:19:02,252 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 14:19:02,252 INFO L422 BasicCegarLoop]: trace histogram [63, 63, 1, 1, 1, 1, 1, 1] [2020-10-24 14:19:02,463 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,63 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-24 14:19:02,464 INFO L429 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 14:19:02,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 14:19:02,464 INFO L82 PathProgramCache]: Analyzing trace with hash -427730901, now seen corresponding path program 63 times [2020-10-24 14:19:02,464 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-24 14:19:02,465 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373329876] [2020-10-24 14:19:02,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 14:19:02,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 14:19:05,580 INFO L134 CoverageAnalysis]: Checked inductivity of 3969 backedges. 0 proven. 3969 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 14:19:05,581 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373329876] [2020-10-24 14:19:05,581 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1433229916] [2020-10-24 14:19:05,581 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-24 14:19:05,777 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 64 check-sat command(s) [2020-10-24 14:19:05,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-24 14:19:05,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 482 conjuncts, 65 conjunts are in the unsatisfiable core [2020-10-24 14:19:05,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-24 14:19:05,837 INFO L134 CoverageAnalysis]: Checked inductivity of 3969 backedges. 0 proven. 3969 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 14:19:05,838 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-24 14:19:05,838 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 67 [2020-10-24 14:19:05,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688369417] [2020-10-24 14:19:05,839 INFO L461 AbstractCegarLoop]: Interpolant automaton has 67 states [2020-10-24 14:19:05,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-24 14:19:05,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2020-10-24 14:19:05,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2020-10-24 14:19:05,840 INFO L87 Difference]: Start difference. First operand 133 states and 133 transitions. Second operand 67 states. [2020-10-24 14:19:06,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 14:19:06,154 INFO L93 Difference]: Finished difference Result 140 states and 140 transitions. [2020-10-24 14:19:06,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2020-10-24 14:19:06,155 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 132 [2020-10-24 14:19:06,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 14:19:06,157 INFO L225 Difference]: With dead ends: 140 [2020-10-24 14:19:06,157 INFO L226 Difference]: Without dead ends: 136 [2020-10-24 14:19:06,158 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2020-10-24 14:19:06,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-10-24 14:19:06,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 135. [2020-10-24 14:19:06,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2020-10-24 14:19:06,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 135 transitions. [2020-10-24 14:19:06,162 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 135 transitions. Word has length 132 [2020-10-24 14:19:06,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 14:19:06,162 INFO L481 AbstractCegarLoop]: Abstraction has 135 states and 135 transitions. [2020-10-24 14:19:06,162 INFO L482 AbstractCegarLoop]: Interpolant automaton has 67 states. [2020-10-24 14:19:06,163 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 135 transitions. [2020-10-24 14:19:06,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2020-10-24 14:19:06,163 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 14:19:06,164 INFO L422 BasicCegarLoop]: trace histogram [64, 64, 1, 1, 1, 1, 1, 1] [2020-10-24 14:19:06,377 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-24 14:19:06,378 INFO L429 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 14:19:06,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 14:19:06,378 INFO L82 PathProgramCache]: Analyzing trace with hash 1320696877, now seen corresponding path program 64 times [2020-10-24 14:19:06,379 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-24 14:19:06,379 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720185567] [2020-10-24 14:19:06,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 14:19:06,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 14:19:09,585 INFO L134 CoverageAnalysis]: Checked inductivity of 4096 backedges. 0 proven. 4096 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 14:19:09,585 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720185567] [2020-10-24 14:19:09,585 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1477927124] [2020-10-24 14:19:09,586 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-24 14:19:09,705 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-24 14:19:09,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-24 14:19:09,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 489 conjuncts, 66 conjunts are in the unsatisfiable core [2020-10-24 14:19:09,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-24 14:19:09,780 INFO L134 CoverageAnalysis]: Checked inductivity of 4096 backedges. 0 proven. 4096 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 14:19:09,781 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-24 14:19:09,781 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 68 [2020-10-24 14:19:09,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829997430] [2020-10-24 14:19:09,782 INFO L461 AbstractCegarLoop]: Interpolant automaton has 68 states [2020-10-24 14:19:09,782 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-24 14:19:09,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2020-10-24 14:19:09,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2020-10-24 14:19:09,783 INFO L87 Difference]: Start difference. First operand 135 states and 135 transitions. Second operand 68 states. [2020-10-24 14:19:10,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 14:19:10,070 INFO L93 Difference]: Finished difference Result 142 states and 142 transitions. [2020-10-24 14:19:10,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2020-10-24 14:19:10,071 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 134 [2020-10-24 14:19:10,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 14:19:10,073 INFO L225 Difference]: With dead ends: 142 [2020-10-24 14:19:10,073 INFO L226 Difference]: Without dead ends: 138 [2020-10-24 14:19:10,074 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2020-10-24 14:19:10,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-10-24 14:19:10,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 137. [2020-10-24 14:19:10,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-10-24 14:19:10,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 137 transitions. [2020-10-24 14:19:10,079 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 137 transitions. Word has length 134 [2020-10-24 14:19:10,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 14:19:10,080 INFO L481 AbstractCegarLoop]: Abstraction has 137 states and 137 transitions. [2020-10-24 14:19:10,080 INFO L482 AbstractCegarLoop]: Interpolant automaton has 68 states. [2020-10-24 14:19:10,080 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 137 transitions. [2020-10-24 14:19:10,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-10-24 14:19:10,081 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 14:19:10,081 INFO L422 BasicCegarLoop]: trace histogram [65, 65, 1, 1, 1, 1, 1, 1] [2020-10-24 14:19:10,293 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-24 14:19:10,294 INFO L429 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 14:19:10,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 14:19:10,295 INFO L82 PathProgramCache]: Analyzing trace with hash -2067388497, now seen corresponding path program 65 times [2020-10-24 14:19:10,295 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-24 14:19:10,295 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432541628] [2020-10-24 14:19:10,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 14:19:10,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 14:19:13,617 INFO L134 CoverageAnalysis]: Checked inductivity of 4225 backedges. 0 proven. 4225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 14:19:13,618 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432541628] [2020-10-24 14:19:13,618 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1259959136] [2020-10-24 14:19:13,618 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-24 14:19:13,780 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 66 check-sat command(s) [2020-10-24 14:19:13,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-24 14:19:13,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 496 conjuncts, 67 conjunts are in the unsatisfiable core [2020-10-24 14:19:13,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-24 14:19:13,848 INFO L134 CoverageAnalysis]: Checked inductivity of 4225 backedges. 0 proven. 4225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 14:19:13,848 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-24 14:19:13,849 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 69 [2020-10-24 14:19:13,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584594792] [2020-10-24 14:19:13,850 INFO L461 AbstractCegarLoop]: Interpolant automaton has 69 states [2020-10-24 14:19:13,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-24 14:19:13,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2020-10-24 14:19:13,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2020-10-24 14:19:13,851 INFO L87 Difference]: Start difference. First operand 137 states and 137 transitions. Second operand 69 states. [2020-10-24 14:19:14,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 14:19:14,121 INFO L93 Difference]: Finished difference Result 144 states and 144 transitions. [2020-10-24 14:19:14,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2020-10-24 14:19:14,122 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 136 [2020-10-24 14:19:14,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 14:19:14,123 INFO L225 Difference]: With dead ends: 144 [2020-10-24 14:19:14,123 INFO L226 Difference]: Without dead ends: 140 [2020-10-24 14:19:14,124 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2020-10-24 14:19:14,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-10-24 14:19:14,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 139. [2020-10-24 14:19:14,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-10-24 14:19:14,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 139 transitions. [2020-10-24 14:19:14,128 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 139 transitions. Word has length 136 [2020-10-24 14:19:14,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 14:19:14,128 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 139 transitions. [2020-10-24 14:19:14,128 INFO L482 AbstractCegarLoop]: Interpolant automaton has 69 states. [2020-10-24 14:19:14,128 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 139 transitions. [2020-10-24 14:19:14,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-10-24 14:19:14,129 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 14:19:14,129 INFO L422 BasicCegarLoop]: trace histogram [66, 66, 1, 1, 1, 1, 1, 1] [2020-10-24 14:19:14,339 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2020-10-24 14:19:14,340 INFO L429 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 14:19:14,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 14:19:14,340 INFO L82 PathProgramCache]: Analyzing trace with hash 1862744753, now seen corresponding path program 66 times [2020-10-24 14:19:14,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-24 14:19:14,341 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28260567] [2020-10-24 14:19:14,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 14:19:14,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 14:19:17,749 INFO L134 CoverageAnalysis]: Checked inductivity of 4356 backedges. 0 proven. 4356 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 14:19:17,749 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28260567] [2020-10-24 14:19:17,749 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1889864399] [2020-10-24 14:19:17,749 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-24 14:19:18,039 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 67 check-sat command(s) [2020-10-24 14:19:18,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-24 14:19:18,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 503 conjuncts, 68 conjunts are in the unsatisfiable core [2020-10-24 14:19:18,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-24 14:19:18,120 INFO L134 CoverageAnalysis]: Checked inductivity of 4356 backedges. 0 proven. 4356 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 14:19:18,121 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-24 14:19:18,121 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 70 [2020-10-24 14:19:18,121 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057995424] [2020-10-24 14:19:18,122 INFO L461 AbstractCegarLoop]: Interpolant automaton has 70 states [2020-10-24 14:19:18,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-24 14:19:18,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2020-10-24 14:19:18,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2020-10-24 14:19:18,124 INFO L87 Difference]: Start difference. First operand 139 states and 139 transitions. Second operand 70 states. [2020-10-24 14:19:18,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 14:19:18,428 INFO L93 Difference]: Finished difference Result 146 states and 146 transitions. [2020-10-24 14:19:18,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2020-10-24 14:19:18,429 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 138 [2020-10-24 14:19:18,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 14:19:18,430 INFO L225 Difference]: With dead ends: 146 [2020-10-24 14:19:18,431 INFO L226 Difference]: Without dead ends: 142 [2020-10-24 14:19:18,431 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2020-10-24 14:19:18,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-10-24 14:19:18,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 141. [2020-10-24 14:19:18,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-10-24 14:19:18,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 141 transitions. [2020-10-24 14:19:18,435 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 141 transitions. Word has length 138 [2020-10-24 14:19:18,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 14:19:18,435 INFO L481 AbstractCegarLoop]: Abstraction has 141 states and 141 transitions. [2020-10-24 14:19:18,436 INFO L482 AbstractCegarLoop]: Interpolant automaton has 70 states. [2020-10-24 14:19:18,436 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 141 transitions. [2020-10-24 14:19:18,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2020-10-24 14:19:18,437 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 14:19:18,437 INFO L422 BasicCegarLoop]: trace histogram [67, 67, 1, 1, 1, 1, 1, 1] [2020-10-24 14:19:18,644 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2020-10-24 14:19:18,645 INFO L429 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 14:19:18,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 14:19:18,646 INFO L82 PathProgramCache]: Analyzing trace with hash -850422477, now seen corresponding path program 67 times [2020-10-24 14:19:18,646 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-24 14:19:18,646 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625521189] [2020-10-24 14:19:18,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 14:19:18,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 14:19:22,151 INFO L134 CoverageAnalysis]: Checked inductivity of 4489 backedges. 0 proven. 4489 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 14:19:22,152 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625521189] [2020-10-24 14:19:22,152 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [738122617] [2020-10-24 14:19:22,152 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-24 14:19:22,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 14:19:22,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 510 conjuncts, 69 conjunts are in the unsatisfiable core [2020-10-24 14:19:22,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-24 14:19:22,356 INFO L134 CoverageAnalysis]: Checked inductivity of 4489 backedges. 0 proven. 4489 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 14:19:22,357 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-24 14:19:22,357 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70] total 71 [2020-10-24 14:19:22,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830768556] [2020-10-24 14:19:22,358 INFO L461 AbstractCegarLoop]: Interpolant automaton has 71 states [2020-10-24 14:19:22,358 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-24 14:19:22,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2020-10-24 14:19:22,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2020-10-24 14:19:22,359 INFO L87 Difference]: Start difference. First operand 141 states and 141 transitions. Second operand 71 states. [2020-10-24 14:19:22,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 14:19:22,667 INFO L93 Difference]: Finished difference Result 148 states and 148 transitions. [2020-10-24 14:19:22,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2020-10-24 14:19:22,668 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 140 [2020-10-24 14:19:22,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 14:19:22,669 INFO L225 Difference]: With dead ends: 148 [2020-10-24 14:19:22,669 INFO L226 Difference]: Without dead ends: 144 [2020-10-24 14:19:22,669 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2020-10-24 14:19:22,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-10-24 14:19:22,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 143. [2020-10-24 14:19:22,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-10-24 14:19:22,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 143 transitions. [2020-10-24 14:19:22,672 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 143 transitions. Word has length 140 [2020-10-24 14:19:22,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 14:19:22,672 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 143 transitions. [2020-10-24 14:19:22,672 INFO L482 AbstractCegarLoop]: Interpolant automaton has 71 states. [2020-10-24 14:19:22,672 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 143 transitions. [2020-10-24 14:19:22,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2020-10-24 14:19:22,673 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 14:19:22,673 INFO L422 BasicCegarLoop]: trace histogram [68, 68, 1, 1, 1, 1, 1, 1] [2020-10-24 14:19:22,873 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-24 14:19:22,874 INFO L429 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 14:19:22,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 14:19:22,875 INFO L82 PathProgramCache]: Analyzing trace with hash -1158981835, now seen corresponding path program 68 times [2020-10-24 14:19:22,875 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-24 14:19:22,875 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330044583] [2020-10-24 14:19:22,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 14:19:22,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 14:19:26,514 INFO L134 CoverageAnalysis]: Checked inductivity of 4624 backedges. 0 proven. 4624 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 14:19:26,514 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330044583] [2020-10-24 14:19:26,515 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1751351890] [2020-10-24 14:19:26,515 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-24 14:19:26,647 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-24 14:19:26,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-24 14:19:26,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 517 conjuncts, 70 conjunts are in the unsatisfiable core [2020-10-24 14:19:26,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-24 14:19:26,706 INFO L134 CoverageAnalysis]: Checked inductivity of 4624 backedges. 0 proven. 4624 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 14:19:26,706 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-24 14:19:26,706 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 72 [2020-10-24 14:19:26,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363842048] [2020-10-24 14:19:26,707 INFO L461 AbstractCegarLoop]: Interpolant automaton has 72 states [2020-10-24 14:19:26,707 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-24 14:19:26,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2020-10-24 14:19:26,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2020-10-24 14:19:26,708 INFO L87 Difference]: Start difference. First operand 143 states and 143 transitions. Second operand 72 states. [2020-10-24 14:19:27,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 14:19:27,066 INFO L93 Difference]: Finished difference Result 150 states and 150 transitions. [2020-10-24 14:19:27,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2020-10-24 14:19:27,067 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 142 [2020-10-24 14:19:27,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 14:19:27,068 INFO L225 Difference]: With dead ends: 150 [2020-10-24 14:19:27,068 INFO L226 Difference]: Without dead ends: 146 [2020-10-24 14:19:27,069 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2020-10-24 14:19:27,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-10-24 14:19:27,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 145. [2020-10-24 14:19:27,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-10-24 14:19:27,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 145 transitions. [2020-10-24 14:19:27,073 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 145 transitions. Word has length 142 [2020-10-24 14:19:27,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 14:19:27,073 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 145 transitions. [2020-10-24 14:19:27,074 INFO L482 AbstractCegarLoop]: Interpolant automaton has 72 states. [2020-10-24 14:19:27,074 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 145 transitions. [2020-10-24 14:19:27,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2020-10-24 14:19:27,075 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 14:19:27,075 INFO L422 BasicCegarLoop]: trace histogram [69, 69, 1, 1, 1, 1, 1, 1] [2020-10-24 14:19:27,286 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2020-10-24 14:19:27,287 INFO L429 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 14:19:27,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 14:19:27,288 INFO L82 PathProgramCache]: Analyzing trace with hash -1331781449, now seen corresponding path program 69 times [2020-10-24 14:19:27,288 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-24 14:19:27,288 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789024212] [2020-10-24 14:19:27,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 14:19:27,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 14:19:31,055 INFO L134 CoverageAnalysis]: Checked inductivity of 4761 backedges. 0 proven. 4761 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 14:19:31,055 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789024212] [2020-10-24 14:19:31,056 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [127774704] [2020-10-24 14:19:31,056 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-24 14:19:31,269 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 70 check-sat command(s) [2020-10-24 14:19:31,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-24 14:19:31,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 524 conjuncts, 71 conjunts are in the unsatisfiable core [2020-10-24 14:19:31,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-24 14:19:31,319 INFO L134 CoverageAnalysis]: Checked inductivity of 4761 backedges. 0 proven. 4761 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 14:19:31,320 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-24 14:19:31,320 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72] total 73 [2020-10-24 14:19:31,320 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708382439] [2020-10-24 14:19:31,320 INFO L461 AbstractCegarLoop]: Interpolant automaton has 73 states [2020-10-24 14:19:31,320 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-24 14:19:31,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2020-10-24 14:19:31,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2020-10-24 14:19:31,321 INFO L87 Difference]: Start difference. First operand 145 states and 145 transitions. Second operand 73 states. [2020-10-24 14:19:31,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 14:19:31,696 INFO L93 Difference]: Finished difference Result 152 states and 152 transitions. [2020-10-24 14:19:31,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2020-10-24 14:19:31,697 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 144 [2020-10-24 14:19:31,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 14:19:31,698 INFO L225 Difference]: With dead ends: 152 [2020-10-24 14:19:31,698 INFO L226 Difference]: Without dead ends: 148 [2020-10-24 14:19:31,699 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2020-10-24 14:19:31,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-10-24 14:19:31,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 147. [2020-10-24 14:19:31,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-10-24 14:19:31,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 147 transitions. [2020-10-24 14:19:31,704 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 147 transitions. Word has length 144 [2020-10-24 14:19:31,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 14:19:31,704 INFO L481 AbstractCegarLoop]: Abstraction has 147 states and 147 transitions. [2020-10-24 14:19:31,704 INFO L482 AbstractCegarLoop]: Interpolant automaton has 73 states. [2020-10-24 14:19:31,704 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 147 transitions. [2020-10-24 14:19:31,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-10-24 14:19:31,705 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 14:19:31,706 INFO L422 BasicCegarLoop]: trace histogram [70, 70, 1, 1, 1, 1, 1, 1] [2020-10-24 14:19:31,917 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2020-10-24 14:19:31,918 INFO L429 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 14:19:31,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 14:19:31,919 INFO L82 PathProgramCache]: Analyzing trace with hash 111514041, now seen corresponding path program 70 times [2020-10-24 14:19:31,919 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-24 14:19:31,919 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358206711] [2020-10-24 14:19:31,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 14:19:31,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 14:19:35,795 INFO L134 CoverageAnalysis]: Checked inductivity of 4900 backedges. 0 proven. 4900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 14:19:35,795 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358206711] [2020-10-24 14:19:35,796 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267501827] [2020-10-24 14:19:35,796 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-24 14:19:35,927 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-24 14:19:35,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-24 14:19:35,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 531 conjuncts, 72 conjunts are in the unsatisfiable core [2020-10-24 14:19:35,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-24 14:19:36,008 INFO L134 CoverageAnalysis]: Checked inductivity of 4900 backedges. 0 proven. 4900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 14:19:36,008 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-24 14:19:36,009 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73] total 74 [2020-10-24 14:19:36,009 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986116465] [2020-10-24 14:19:36,009 INFO L461 AbstractCegarLoop]: Interpolant automaton has 74 states [2020-10-24 14:19:36,010 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-24 14:19:36,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2020-10-24 14:19:36,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2020-10-24 14:19:36,011 INFO L87 Difference]: Start difference. First operand 147 states and 147 transitions. Second operand 74 states. [2020-10-24 14:19:36,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 14:19:36,341 INFO L93 Difference]: Finished difference Result 154 states and 154 transitions. [2020-10-24 14:19:36,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2020-10-24 14:19:36,342 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 146 [2020-10-24 14:19:36,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 14:19:36,343 INFO L225 Difference]: With dead ends: 154 [2020-10-24 14:19:36,343 INFO L226 Difference]: Without dead ends: 150 [2020-10-24 14:19:36,344 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2020-10-24 14:19:36,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-10-24 14:19:36,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 149. [2020-10-24 14:19:36,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2020-10-24 14:19:36,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 149 transitions. [2020-10-24 14:19:36,349 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 149 transitions. Word has length 146 [2020-10-24 14:19:36,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 14:19:36,349 INFO L481 AbstractCegarLoop]: Abstraction has 149 states and 149 transitions. [2020-10-24 14:19:36,349 INFO L482 AbstractCegarLoop]: Interpolant automaton has 74 states. [2020-10-24 14:19:36,349 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 149 transitions. [2020-10-24 14:19:36,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-10-24 14:19:36,350 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 14:19:36,350 INFO L422 BasicCegarLoop]: trace histogram [71, 71, 1, 1, 1, 1, 1, 1] [2020-10-24 14:19:36,561 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable70 [2020-10-24 14:19:36,562 INFO L429 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 14:19:36,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 14:19:36,562 INFO L82 PathProgramCache]: Analyzing trace with hash -155956677, now seen corresponding path program 71 times [2020-10-24 14:19:36,563 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-24 14:19:36,563 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428001639] [2020-10-24 14:19:36,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 14:19:36,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 14:19:40,439 INFO L134 CoverageAnalysis]: Checked inductivity of 5041 backedges. 0 proven. 5041 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 14:19:40,440 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428001639] [2020-10-24 14:19:40,440 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2091740278] [2020-10-24 14:19:40,440 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-24 14:19:40,617 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 72 check-sat command(s) [2020-10-24 14:19:40,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-24 14:19:40,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 538 conjuncts, 73 conjunts are in the unsatisfiable core [2020-10-24 14:19:40,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-24 14:19:40,699 INFO L134 CoverageAnalysis]: Checked inductivity of 5041 backedges. 0 proven. 5041 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 14:19:40,700 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-24 14:19:40,700 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74] total 75 [2020-10-24 14:19:40,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057691040] [2020-10-24 14:19:40,701 INFO L461 AbstractCegarLoop]: Interpolant automaton has 75 states [2020-10-24 14:19:40,701 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-24 14:19:40,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2020-10-24 14:19:40,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2020-10-24 14:19:40,702 INFO L87 Difference]: Start difference. First operand 149 states and 149 transitions. Second operand 75 states. [2020-10-24 14:19:41,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 14:19:41,156 INFO L93 Difference]: Finished difference Result 156 states and 156 transitions. [2020-10-24 14:19:41,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2020-10-24 14:19:41,157 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 148 [2020-10-24 14:19:41,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 14:19:41,158 INFO L225 Difference]: With dead ends: 156 [2020-10-24 14:19:41,158 INFO L226 Difference]: Without dead ends: 152 [2020-10-24 14:19:41,159 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2020-10-24 14:19:41,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-10-24 14:19:41,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 151. [2020-10-24 14:19:41,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2020-10-24 14:19:41,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 151 transitions. [2020-10-24 14:19:41,163 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 151 transitions. Word has length 148 [2020-10-24 14:19:41,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 14:19:41,163 INFO L481 AbstractCegarLoop]: Abstraction has 151 states and 151 transitions. [2020-10-24 14:19:41,163 INFO L482 AbstractCegarLoop]: Interpolant automaton has 75 states. [2020-10-24 14:19:41,164 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 151 transitions. [2020-10-24 14:19:41,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2020-10-24 14:19:41,164 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 14:19:41,165 INFO L422 BasicCegarLoop]: trace histogram [72, 72, 1, 1, 1, 1, 1, 1] [2020-10-24 14:19:41,378 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-24 14:19:41,379 INFO L429 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 14:19:41,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 14:19:41,379 INFO L82 PathProgramCache]: Analyzing trace with hash 502721085, now seen corresponding path program 72 times [2020-10-24 14:19:41,380 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-24 14:19:41,380 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25639015] [2020-10-24 14:19:41,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 14:19:41,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 14:19:45,393 INFO L134 CoverageAnalysis]: Checked inductivity of 5184 backedges. 0 proven. 5184 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 14:19:45,394 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25639015] [2020-10-24 14:19:45,394 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [908100310] [2020-10-24 14:19:45,394 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-24 14:19:45,618 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 73 check-sat command(s) [2020-10-24 14:19:45,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-24 14:19:45,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 545 conjuncts, 74 conjunts are in the unsatisfiable core [2020-10-24 14:19:45,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-24 14:19:45,685 INFO L134 CoverageAnalysis]: Checked inductivity of 5184 backedges. 0 proven. 5184 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 14:19:45,686 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-24 14:19:45,686 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 76 [2020-10-24 14:19:45,687 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983403298] [2020-10-24 14:19:45,687 INFO L461 AbstractCegarLoop]: Interpolant automaton has 76 states [2020-10-24 14:19:45,687 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-24 14:19:45,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2020-10-24 14:19:45,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2020-10-24 14:19:45,689 INFO L87 Difference]: Start difference. First operand 151 states and 151 transitions. Second operand 76 states. [2020-10-24 14:19:46,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 14:19:46,009 INFO L93 Difference]: Finished difference Result 158 states and 158 transitions. [2020-10-24 14:19:46,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2020-10-24 14:19:46,009 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 150 [2020-10-24 14:19:46,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 14:19:46,011 INFO L225 Difference]: With dead ends: 158 [2020-10-24 14:19:46,011 INFO L226 Difference]: Without dead ends: 154 [2020-10-24 14:19:46,012 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2020-10-24 14:19:46,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-10-24 14:19:46,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 153. [2020-10-24 14:19:46,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2020-10-24 14:19:46,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 153 transitions. [2020-10-24 14:19:46,016 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 153 transitions. Word has length 150 [2020-10-24 14:19:46,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 14:19:46,017 INFO L481 AbstractCegarLoop]: Abstraction has 153 states and 153 transitions. [2020-10-24 14:19:46,017 INFO L482 AbstractCegarLoop]: Interpolant automaton has 76 states. [2020-10-24 14:19:46,017 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 153 transitions. [2020-10-24 14:19:46,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2020-10-24 14:19:46,018 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 14:19:46,018 INFO L422 BasicCegarLoop]: trace histogram [73, 73, 1, 1, 1, 1, 1, 1] [2020-10-24 14:19:46,230 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-24 14:19:46,230 INFO L429 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 14:19:46,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 14:19:46,231 INFO L82 PathProgramCache]: Analyzing trace with hash 2131857855, now seen corresponding path program 73 times [2020-10-24 14:19:46,232 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-24 14:19:46,232 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009095239] [2020-10-24 14:19:46,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 14:19:46,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 14:19:50,432 INFO L134 CoverageAnalysis]: Checked inductivity of 5329 backedges. 0 proven. 5329 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 14:19:50,432 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009095239] [2020-10-24 14:19:50,432 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1266041561] [2020-10-24 14:19:50,432 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-24 14:19:50,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 14:19:50,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 552 conjuncts, 75 conjunts are in the unsatisfiable core [2020-10-24 14:19:50,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-24 14:19:50,631 INFO L134 CoverageAnalysis]: Checked inductivity of 5329 backedges. 0 proven. 5329 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 14:19:50,631 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-24 14:19:50,632 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76] total 77 [2020-10-24 14:19:50,632 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855854224] [2020-10-24 14:19:50,632 INFO L461 AbstractCegarLoop]: Interpolant automaton has 77 states [2020-10-24 14:19:50,633 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-24 14:19:50,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2020-10-24 14:19:50,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2020-10-24 14:19:50,634 INFO L87 Difference]: Start difference. First operand 153 states and 153 transitions. Second operand 77 states. [2020-10-24 14:19:51,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 14:19:51,010 INFO L93 Difference]: Finished difference Result 160 states and 160 transitions. [2020-10-24 14:19:51,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2020-10-24 14:19:51,011 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 152 [2020-10-24 14:19:51,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 14:19:51,012 INFO L225 Difference]: With dead ends: 160 [2020-10-24 14:19:51,012 INFO L226 Difference]: Without dead ends: 156 [2020-10-24 14:19:51,012 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2020-10-24 14:19:51,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2020-10-24 14:19:51,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 155. [2020-10-24 14:19:51,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2020-10-24 14:19:51,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 155 transitions. [2020-10-24 14:19:51,018 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 155 transitions. Word has length 152 [2020-10-24 14:19:51,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 14:19:51,018 INFO L481 AbstractCegarLoop]: Abstraction has 155 states and 155 transitions. [2020-10-24 14:19:51,018 INFO L482 AbstractCegarLoop]: Interpolant automaton has 77 states. [2020-10-24 14:19:51,018 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 155 transitions. [2020-10-24 14:19:51,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2020-10-24 14:19:51,019 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 14:19:51,020 INFO L422 BasicCegarLoop]: trace histogram [74, 74, 1, 1, 1, 1, 1, 1] [2020-10-24 14:19:51,226 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-24 14:19:51,227 INFO L429 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 14:19:51,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 14:19:51,228 INFO L82 PathProgramCache]: Analyzing trace with hash 69230785, now seen corresponding path program 74 times [2020-10-24 14:19:51,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-24 14:19:51,228 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933705040] [2020-10-24 14:19:51,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 14:19:51,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 14:19:55,527 INFO L134 CoverageAnalysis]: Checked inductivity of 5476 backedges. 0 proven. 5476 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 14:19:55,527 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933705040] [2020-10-24 14:19:55,527 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [509942740] [2020-10-24 14:19:55,527 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-24 14:19:55,674 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-24 14:19:55,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-24 14:19:55,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 559 conjuncts, 76 conjunts are in the unsatisfiable core [2020-10-24 14:19:55,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-24 14:19:55,750 INFO L134 CoverageAnalysis]: Checked inductivity of 5476 backedges. 0 proven. 5476 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 14:19:55,750 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-24 14:19:55,750 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77] total 78 [2020-10-24 14:19:55,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117326631] [2020-10-24 14:19:55,751 INFO L461 AbstractCegarLoop]: Interpolant automaton has 78 states [2020-10-24 14:19:55,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-24 14:19:55,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2020-10-24 14:19:55,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2020-10-24 14:19:55,753 INFO L87 Difference]: Start difference. First operand 155 states and 155 transitions. Second operand 78 states. [2020-10-24 14:19:56,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 14:19:56,196 INFO L93 Difference]: Finished difference Result 162 states and 162 transitions. [2020-10-24 14:19:56,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2020-10-24 14:19:56,197 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 154 [2020-10-24 14:19:56,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 14:19:56,198 INFO L225 Difference]: With dead ends: 162 [2020-10-24 14:19:56,198 INFO L226 Difference]: Without dead ends: 158 [2020-10-24 14:19:56,198 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2020-10-24 14:19:56,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2020-10-24 14:19:56,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 157. [2020-10-24 14:19:56,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-10-24 14:19:56,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 157 transitions. [2020-10-24 14:19:56,202 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 157 transitions. Word has length 154 [2020-10-24 14:19:56,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 14:19:56,203 INFO L481 AbstractCegarLoop]: Abstraction has 157 states and 157 transitions. [2020-10-24 14:19:56,203 INFO L482 AbstractCegarLoop]: Interpolant automaton has 78 states. [2020-10-24 14:19:56,203 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 157 transitions. [2020-10-24 14:19:56,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2020-10-24 14:19:56,204 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 14:19:56,204 INFO L422 BasicCegarLoop]: trace histogram [75, 75, 1, 1, 1, 1, 1, 1] [2020-10-24 14:19:56,416 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2020-10-24 14:19:56,417 INFO L429 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 14:19:56,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 14:19:56,417 INFO L82 PathProgramCache]: Analyzing trace with hash -2135460029, now seen corresponding path program 75 times [2020-10-24 14:19:56,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-24 14:19:56,418 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611919058] [2020-10-24 14:19:56,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 14:19:56,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 14:20:00,792 INFO L134 CoverageAnalysis]: Checked inductivity of 5625 backedges. 0 proven. 5625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 14:20:00,792 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611919058] [2020-10-24 14:20:00,792 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1271539501] [2020-10-24 14:20:00,792 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-24 14:20:01,022 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 76 check-sat command(s) [2020-10-24 14:20:01,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-24 14:20:01,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 566 conjuncts, 77 conjunts are in the unsatisfiable core [2020-10-24 14:20:01,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-24 14:20:01,121 INFO L134 CoverageAnalysis]: Checked inductivity of 5625 backedges. 0 proven. 5625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 14:20:01,121 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-24 14:20:01,121 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 78] total 79 [2020-10-24 14:20:01,121 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698688308] [2020-10-24 14:20:01,122 INFO L461 AbstractCegarLoop]: Interpolant automaton has 79 states [2020-10-24 14:20:01,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-24 14:20:01,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2020-10-24 14:20:01,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162 [2020-10-24 14:20:01,123 INFO L87 Difference]: Start difference. First operand 157 states and 157 transitions. Second operand 79 states. [2020-10-24 14:20:01,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 14:20:01,568 INFO L93 Difference]: Finished difference Result 164 states and 164 transitions. [2020-10-24 14:20:01,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2020-10-24 14:20:01,568 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 156 [2020-10-24 14:20:01,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 14:20:01,570 INFO L225 Difference]: With dead ends: 164 [2020-10-24 14:20:01,570 INFO L226 Difference]: Without dead ends: 160 [2020-10-24 14:20:01,570 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162 [2020-10-24 14:20:01,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-10-24 14:20:01,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 159. [2020-10-24 14:20:01,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-10-24 14:20:01,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 159 transitions. [2020-10-24 14:20:01,575 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 159 transitions. Word has length 156 [2020-10-24 14:20:01,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 14:20:01,575 INFO L481 AbstractCegarLoop]: Abstraction has 159 states and 159 transitions. [2020-10-24 14:20:01,575 INFO L482 AbstractCegarLoop]: Interpolant automaton has 79 states. [2020-10-24 14:20:01,575 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 159 transitions. [2020-10-24 14:20:01,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2020-10-24 14:20:01,576 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 14:20:01,577 INFO L422 BasicCegarLoop]: trace histogram [76, 76, 1, 1, 1, 1, 1, 1] [2020-10-24 14:20:01,784 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-24 14:20:01,785 INFO L429 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 14:20:01,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 14:20:01,785 INFO L82 PathProgramCache]: Analyzing trace with hash 870511941, now seen corresponding path program 76 times [2020-10-24 14:20:01,786 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-24 14:20:01,786 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142546602] [2020-10-24 14:20:01,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 14:20:01,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 14:20:06,289 INFO L134 CoverageAnalysis]: Checked inductivity of 5776 backedges. 0 proven. 5776 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 14:20:06,289 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142546602] [2020-10-24 14:20:06,289 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [822304517] [2020-10-24 14:20:06,289 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-24 14:20:06,426 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-24 14:20:06,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-24 14:20:06,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 573 conjuncts, 78 conjunts are in the unsatisfiable core [2020-10-24 14:20:06,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-24 14:20:06,490 INFO L134 CoverageAnalysis]: Checked inductivity of 5776 backedges. 0 proven. 5776 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 14:20:06,490 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-24 14:20:06,490 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 79] total 80 [2020-10-24 14:20:06,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447902532] [2020-10-24 14:20:06,491 INFO L461 AbstractCegarLoop]: Interpolant automaton has 80 states [2020-10-24 14:20:06,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-24 14:20:06,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2020-10-24 14:20:06,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3160, Invalid=3160, Unknown=0, NotChecked=0, Total=6320 [2020-10-24 14:20:06,492 INFO L87 Difference]: Start difference. First operand 159 states and 159 transitions. Second operand 80 states. [2020-10-24 14:20:06,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 14:20:06,975 INFO L93 Difference]: Finished difference Result 166 states and 166 transitions. [2020-10-24 14:20:06,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2020-10-24 14:20:06,975 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 158 [2020-10-24 14:20:06,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 14:20:06,977 INFO L225 Difference]: With dead ends: 166 [2020-10-24 14:20:06,977 INFO L226 Difference]: Without dead ends: 162 [2020-10-24 14:20:06,977 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=3160, Invalid=3160, Unknown=0, NotChecked=0, Total=6320 [2020-10-24 14:20:06,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-10-24 14:20:06,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 161. [2020-10-24 14:20:06,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-10-24 14:20:06,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 161 transitions. [2020-10-24 14:20:06,982 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 161 transitions. Word has length 158 [2020-10-24 14:20:06,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 14:20:06,982 INFO L481 AbstractCegarLoop]: Abstraction has 161 states and 161 transitions. [2020-10-24 14:20:06,982 INFO L482 AbstractCegarLoop]: Interpolant automaton has 80 states. [2020-10-24 14:20:06,982 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 161 transitions. [2020-10-24 14:20:06,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2020-10-24 14:20:06,983 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 14:20:06,983 INFO L422 BasicCegarLoop]: trace histogram [77, 77, 1, 1, 1, 1, 1, 1] [2020-10-24 14:20:07,185 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-24 14:20:07,185 INFO L429 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 14:20:07,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 14:20:07,186 INFO L82 PathProgramCache]: Analyzing trace with hash -903415097, now seen corresponding path program 77 times [2020-10-24 14:20:07,186 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-24 14:20:07,186 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211522116] [2020-10-24 14:20:07,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 14:20:07,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 14:20:11,864 INFO L134 CoverageAnalysis]: Checked inductivity of 5929 backedges. 0 proven. 5929 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 14:20:11,864 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211522116] [2020-10-24 14:20:11,864 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [457440438] [2020-10-24 14:20:11,865 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-24 14:20:12,061 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 78 check-sat command(s) [2020-10-24 14:20:12,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-24 14:20:12,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 580 conjuncts, 79 conjunts are in the unsatisfiable core [2020-10-24 14:20:12,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-24 14:20:12,131 INFO L134 CoverageAnalysis]: Checked inductivity of 5929 backedges. 0 proven. 5929 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 14:20:12,131 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-24 14:20:12,131 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 80] total 81 [2020-10-24 14:20:12,131 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248242996] [2020-10-24 14:20:12,132 INFO L461 AbstractCegarLoop]: Interpolant automaton has 81 states [2020-10-24 14:20:12,132 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-24 14:20:12,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2020-10-24 14:20:12,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2020-10-24 14:20:12,133 INFO L87 Difference]: Start difference. First operand 161 states and 161 transitions. Second operand 81 states. [2020-10-24 14:20:12,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 14:20:12,570 INFO L93 Difference]: Finished difference Result 168 states and 168 transitions. [2020-10-24 14:20:12,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2020-10-24 14:20:12,571 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 160 [2020-10-24 14:20:12,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 14:20:12,572 INFO L225 Difference]: With dead ends: 168 [2020-10-24 14:20:12,572 INFO L226 Difference]: Without dead ends: 164 [2020-10-24 14:20:12,572 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2020-10-24 14:20:12,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2020-10-24 14:20:12,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 163. [2020-10-24 14:20:12,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-24 14:20:12,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 163 transitions. [2020-10-24 14:20:12,577 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 163 transitions. Word has length 160 [2020-10-24 14:20:12,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 14:20:12,577 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 163 transitions. [2020-10-24 14:20:12,577 INFO L482 AbstractCegarLoop]: Interpolant automaton has 81 states. [2020-10-24 14:20:12,577 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 163 transitions. [2020-10-24 14:20:12,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2020-10-24 14:20:12,578 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 14:20:12,579 INFO L422 BasicCegarLoop]: trace histogram [78, 78, 1, 1, 1, 1, 1, 1] [2020-10-24 14:20:12,789 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2020-10-24 14:20:12,790 INFO L429 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 14:20:12,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 14:20:12,791 INFO L82 PathProgramCache]: Analyzing trace with hash -545282103, now seen corresponding path program 78 times [2020-10-24 14:20:12,791 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-24 14:20:12,791 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055896290] [2020-10-24 14:20:12,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 14:20:12,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 14:20:17,547 INFO L134 CoverageAnalysis]: Checked inductivity of 6084 backedges. 0 proven. 6084 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 14:20:17,547 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055896290] [2020-10-24 14:20:17,547 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [778622677] [2020-10-24 14:20:17,548 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-24 14:20:17,796 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 79 check-sat command(s) [2020-10-24 14:20:17,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-24 14:20:17,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 587 conjuncts, 80 conjunts are in the unsatisfiable core [2020-10-24 14:20:17,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-24 14:20:17,866 INFO L134 CoverageAnalysis]: Checked inductivity of 6084 backedges. 0 proven. 6084 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 14:20:17,866 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-24 14:20:17,867 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 81] total 82 [2020-10-24 14:20:17,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118025067] [2020-10-24 14:20:17,867 INFO L461 AbstractCegarLoop]: Interpolant automaton has 82 states [2020-10-24 14:20:17,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-24 14:20:17,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2020-10-24 14:20:17,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642 [2020-10-24 14:20:17,868 INFO L87 Difference]: Start difference. First operand 163 states and 163 transitions. Second operand 82 states. [2020-10-24 14:20:18,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 14:20:18,364 INFO L93 Difference]: Finished difference Result 170 states and 170 transitions. [2020-10-24 14:20:18,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2020-10-24 14:20:18,365 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 162 [2020-10-24 14:20:18,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 14:20:18,366 INFO L225 Difference]: With dead ends: 170 [2020-10-24 14:20:18,366 INFO L226 Difference]: Without dead ends: 166 [2020-10-24 14:20:18,367 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642 [2020-10-24 14:20:18,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-10-24 14:20:18,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 165. [2020-10-24 14:20:18,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2020-10-24 14:20:18,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 165 transitions. [2020-10-24 14:20:18,370 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 165 transitions. Word has length 162 [2020-10-24 14:20:18,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 14:20:18,370 INFO L481 AbstractCegarLoop]: Abstraction has 165 states and 165 transitions. [2020-10-24 14:20:18,370 INFO L482 AbstractCegarLoop]: Interpolant automaton has 82 states. [2020-10-24 14:20:18,370 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 165 transitions. [2020-10-24 14:20:18,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2020-10-24 14:20:18,371 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 14:20:18,371 INFO L422 BasicCegarLoop]: trace histogram [79, 79, 1, 1, 1, 1, 1, 1] [2020-10-24 14:20:18,573 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2020-10-24 14:20:18,574 INFO L429 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 14:20:18,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 14:20:18,574 INFO L82 PathProgramCache]: Analyzing trace with hash 23141451, now seen corresponding path program 79 times [2020-10-24 14:20:18,575 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-24 14:20:18,575 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999315369] [2020-10-24 14:20:18,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 14:20:18,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 14:20:23,464 INFO L134 CoverageAnalysis]: Checked inductivity of 6241 backedges. 0 proven. 6241 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 14:20:23,464 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999315369] [2020-10-24 14:20:23,464 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [64135203] [2020-10-24 14:20:23,464 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-24 14:20:23,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 14:20:23,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 594 conjuncts, 81 conjunts are in the unsatisfiable core [2020-10-24 14:20:23,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-24 14:20:23,662 INFO L134 CoverageAnalysis]: Checked inductivity of 6241 backedges. 0 proven. 6241 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 14:20:23,662 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-24 14:20:23,663 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [82, 82] total 83 [2020-10-24 14:20:23,663 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982373554] [2020-10-24 14:20:23,663 INFO L461 AbstractCegarLoop]: Interpolant automaton has 83 states [2020-10-24 14:20:23,663 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-24 14:20:23,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2020-10-24 14:20:23,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3403, Invalid=3403, Unknown=0, NotChecked=0, Total=6806 [2020-10-24 14:20:23,664 INFO L87 Difference]: Start difference. First operand 165 states and 165 transitions. Second operand 83 states. [2020-10-24 14:20:24,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 14:20:24,057 INFO L93 Difference]: Finished difference Result 172 states and 172 transitions. [2020-10-24 14:20:24,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2020-10-24 14:20:24,058 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 164 [2020-10-24 14:20:24,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 14:20:24,059 INFO L225 Difference]: With dead ends: 172 [2020-10-24 14:20:24,059 INFO L226 Difference]: Without dead ends: 168 [2020-10-24 14:20:24,060 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=3403, Invalid=3403, Unknown=0, NotChecked=0, Total=6806 [2020-10-24 14:20:24,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2020-10-24 14:20:24,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 167. [2020-10-24 14:20:24,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-10-24 14:20:24,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 167 transitions. [2020-10-24 14:20:24,064 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 167 transitions. Word has length 164 [2020-10-24 14:20:24,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 14:20:24,064 INFO L481 AbstractCegarLoop]: Abstraction has 167 states and 167 transitions. [2020-10-24 14:20:24,064 INFO L482 AbstractCegarLoop]: Interpolant automaton has 83 states. [2020-10-24 14:20:24,064 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 167 transitions. [2020-10-24 14:20:24,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2020-10-24 14:20:24,065 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 14:20:24,065 INFO L422 BasicCegarLoop]: trace histogram [80, 80, 1, 1, 1, 1, 1, 1] [2020-10-24 14:20:24,266 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-24 14:20:24,266 INFO L429 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 14:20:24,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 14:20:24,267 INFO L82 PathProgramCache]: Analyzing trace with hash 817330253, now seen corresponding path program 80 times [2020-10-24 14:20:24,267 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-24 14:20:24,268 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651135756] [2020-10-24 14:20:24,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 14:20:24,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 14:20:29,276 INFO L134 CoverageAnalysis]: Checked inductivity of 6400 backedges. 0 proven. 6400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 14:20:29,277 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651135756] [2020-10-24 14:20:29,277 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1335389421] [2020-10-24 14:20:29,277 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-24 14:20:29,419 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-24 14:20:29,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-24 14:20:29,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 601 conjuncts, 82 conjunts are in the unsatisfiable core [2020-10-24 14:20:29,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-24 14:20:29,488 INFO L134 CoverageAnalysis]: Checked inductivity of 6400 backedges. 0 proven. 6400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 14:20:29,489 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-24 14:20:29,489 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 83] total 84 [2020-10-24 14:20:29,489 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107408410] [2020-10-24 14:20:29,489 INFO L461 AbstractCegarLoop]: Interpolant automaton has 84 states [2020-10-24 14:20:29,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-24 14:20:29,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2020-10-24 14:20:29,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3486, Invalid=3486, Unknown=0, NotChecked=0, Total=6972 [2020-10-24 14:20:29,491 INFO L87 Difference]: Start difference. First operand 167 states and 167 transitions. Second operand 84 states. [2020-10-24 14:20:29,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 14:20:29,922 INFO L93 Difference]: Finished difference Result 174 states and 174 transitions. [2020-10-24 14:20:29,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2020-10-24 14:20:29,922 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 166 [2020-10-24 14:20:29,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 14:20:29,924 INFO L225 Difference]: With dead ends: 174 [2020-10-24 14:20:29,924 INFO L226 Difference]: Without dead ends: 170 [2020-10-24 14:20:29,924 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=3486, Invalid=3486, Unknown=0, NotChecked=0, Total=6972 [2020-10-24 14:20:29,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2020-10-24 14:20:29,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 169. [2020-10-24 14:20:29,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-10-24 14:20:29,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 169 transitions. [2020-10-24 14:20:29,927 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 169 transitions. Word has length 166 [2020-10-24 14:20:29,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 14:20:29,928 INFO L481 AbstractCegarLoop]: Abstraction has 169 states and 169 transitions. [2020-10-24 14:20:29,928 INFO L482 AbstractCegarLoop]: Interpolant automaton has 84 states. [2020-10-24 14:20:29,928 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 169 transitions. [2020-10-24 14:20:29,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2020-10-24 14:20:29,929 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 14:20:29,929 INFO L422 BasicCegarLoop]: trace histogram [81, 81, 1, 1, 1, 1, 1, 1] [2020-10-24 14:20:30,140 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-24 14:20:30,141 INFO L429 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 14:20:30,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 14:20:30,142 INFO L82 PathProgramCache]: Analyzing trace with hash -471409713, now seen corresponding path program 81 times [2020-10-24 14:20:30,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-24 14:20:30,142 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478557995] [2020-10-24 14:20:30,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 14:20:30,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 14:20:35,316 INFO L134 CoverageAnalysis]: Checked inductivity of 6561 backedges. 0 proven. 6561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 14:20:35,316 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478557995] [2020-10-24 14:20:35,316 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1949611824] [2020-10-24 14:20:35,316 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-24 14:20:35,573 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 82 check-sat command(s) [2020-10-24 14:20:35,573 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-24 14:20:35,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 608 conjuncts, 83 conjunts are in the unsatisfiable core [2020-10-24 14:20:35,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-24 14:20:35,651 INFO L134 CoverageAnalysis]: Checked inductivity of 6561 backedges. 0 proven. 6561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 14:20:35,652 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-24 14:20:35,652 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [84, 84] total 85 [2020-10-24 14:20:35,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279145638] [2020-10-24 14:20:35,653 INFO L461 AbstractCegarLoop]: Interpolant automaton has 85 states [2020-10-24 14:20:35,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-24 14:20:35,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2020-10-24 14:20:35,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3570, Invalid=3570, Unknown=0, NotChecked=0, Total=7140 [2020-10-24 14:20:35,655 INFO L87 Difference]: Start difference. First operand 169 states and 169 transitions. Second operand 85 states. [2020-10-24 14:20:36,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 14:20:36,113 INFO L93 Difference]: Finished difference Result 176 states and 176 transitions. [2020-10-24 14:20:36,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2020-10-24 14:20:36,114 INFO L78 Accepts]: Start accepts. Automaton has 85 states. Word has length 168 [2020-10-24 14:20:36,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 14:20:36,114 INFO L225 Difference]: With dead ends: 176 [2020-10-24 14:20:36,115 INFO L226 Difference]: Without dead ends: 172 [2020-10-24 14:20:36,115 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=3570, Invalid=3570, Unknown=0, NotChecked=0, Total=7140 [2020-10-24 14:20:36,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-10-24 14:20:36,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 171. [2020-10-24 14:20:36,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2020-10-24 14:20:36,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 171 transitions. [2020-10-24 14:20:36,118 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 171 transitions. Word has length 168 [2020-10-24 14:20:36,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 14:20:36,119 INFO L481 AbstractCegarLoop]: Abstraction has 171 states and 171 transitions. [2020-10-24 14:20:36,119 INFO L482 AbstractCegarLoop]: Interpolant automaton has 85 states. [2020-10-24 14:20:36,119 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 171 transitions. [2020-10-24 14:20:36,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2020-10-24 14:20:36,120 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 14:20:36,120 INFO L422 BasicCegarLoop]: trace histogram [82, 82, 1, 1, 1, 1, 1, 1] [2020-10-24 14:20:36,331 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-24 14:20:36,332 INFO L429 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 14:20:36,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 14:20:36,332 INFO L82 PathProgramCache]: Analyzing trace with hash -1999935791, now seen corresponding path program 82 times [2020-10-24 14:20:36,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-24 14:20:36,333 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676798443] [2020-10-24 14:20:36,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 14:20:36,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 14:20:41,657 INFO L134 CoverageAnalysis]: Checked inductivity of 6724 backedges. 0 proven. 6724 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 14:20:41,657 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676798443] [2020-10-24 14:20:41,657 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [977680528] [2020-10-24 14:20:41,657 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-24 14:20:41,804 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-24 14:20:41,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-24 14:20:41,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 615 conjuncts, 84 conjunts are in the unsatisfiable core [2020-10-24 14:20:41,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-24 14:20:41,880 INFO L134 CoverageAnalysis]: Checked inductivity of 6724 backedges. 0 proven. 6724 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 14:20:41,880 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-24 14:20:41,881 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 85] total 86 [2020-10-24 14:20:41,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448424317] [2020-10-24 14:20:41,881 INFO L461 AbstractCegarLoop]: Interpolant automaton has 86 states [2020-10-24 14:20:41,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-24 14:20:41,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2020-10-24 14:20:41,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3655, Invalid=3655, Unknown=0, NotChecked=0, Total=7310 [2020-10-24 14:20:41,882 INFO L87 Difference]: Start difference. First operand 171 states and 171 transitions. Second operand 86 states. [2020-10-24 14:20:42,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 14:20:42,335 INFO L93 Difference]: Finished difference Result 178 states and 178 transitions. [2020-10-24 14:20:42,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2020-10-24 14:20:42,336 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 170 [2020-10-24 14:20:42,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 14:20:42,337 INFO L225 Difference]: With dead ends: 178 [2020-10-24 14:20:42,337 INFO L226 Difference]: Without dead ends: 174 [2020-10-24 14:20:42,337 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=3655, Invalid=3655, Unknown=0, NotChecked=0, Total=7310 [2020-10-24 14:20:42,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2020-10-24 14:20:42,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 173. [2020-10-24 14:20:42,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2020-10-24 14:20:42,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 173 transitions. [2020-10-24 14:20:42,340 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 173 transitions. Word has length 170 [2020-10-24 14:20:42,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 14:20:42,341 INFO L481 AbstractCegarLoop]: Abstraction has 173 states and 173 transitions. [2020-10-24 14:20:42,341 INFO L482 AbstractCegarLoop]: Interpolant automaton has 86 states. [2020-10-24 14:20:42,341 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 173 transitions. [2020-10-24 14:20:42,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2020-10-24 14:20:42,342 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 14:20:42,342 INFO L422 BasicCegarLoop]: trace histogram [83, 83, 1, 1, 1, 1, 1, 1] [2020-10-24 14:20:42,542 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-24 14:20:42,543 INFO L429 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 14:20:42,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 14:20:42,543 INFO L82 PathProgramCache]: Analyzing trace with hash -2034681517, now seen corresponding path program 83 times [2020-10-24 14:20:42,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-24 14:20:42,544 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470433421] [2020-10-24 14:20:42,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 14:20:42,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 14:20:48,119 INFO L134 CoverageAnalysis]: Checked inductivity of 6889 backedges. 0 proven. 6889 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 14:20:48,120 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470433421] [2020-10-24 14:20:48,120 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [815134704] [2020-10-24 14:20:48,120 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-24 14:20:48,337 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 84 check-sat command(s) [2020-10-24 14:20:48,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-24 14:20:48,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 622 conjuncts, 85 conjunts are in the unsatisfiable core [2020-10-24 14:20:48,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-24 14:20:48,423 INFO L134 CoverageAnalysis]: Checked inductivity of 6889 backedges. 0 proven. 6889 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 14:20:48,423 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-24 14:20:48,423 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [86, 86] total 87 [2020-10-24 14:20:48,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423083248] [2020-10-24 14:20:48,424 INFO L461 AbstractCegarLoop]: Interpolant automaton has 87 states [2020-10-24 14:20:48,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-24 14:20:48,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2020-10-24 14:20:48,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3741, Invalid=3741, Unknown=0, NotChecked=0, Total=7482 [2020-10-24 14:20:48,425 INFO L87 Difference]: Start difference. First operand 173 states and 173 transitions. Second operand 87 states. [2020-10-24 14:20:48,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 14:20:48,846 INFO L93 Difference]: Finished difference Result 180 states and 180 transitions. [2020-10-24 14:20:48,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2020-10-24 14:20:48,847 INFO L78 Accepts]: Start accepts. Automaton has 87 states. Word has length 172 [2020-10-24 14:20:48,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 14:20:48,848 INFO L225 Difference]: With dead ends: 180 [2020-10-24 14:20:48,848 INFO L226 Difference]: Without dead ends: 176 [2020-10-24 14:20:48,848 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=3741, Invalid=3741, Unknown=0, NotChecked=0, Total=7482 [2020-10-24 14:20:48,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2020-10-24 14:20:48,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 175. [2020-10-24 14:20:48,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2020-10-24 14:20:48,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 175 transitions. [2020-10-24 14:20:48,854 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 175 transitions. Word has length 172 [2020-10-24 14:20:48,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 14:20:48,854 INFO L481 AbstractCegarLoop]: Abstraction has 175 states and 175 transitions. [2020-10-24 14:20:48,854 INFO L482 AbstractCegarLoop]: Interpolant automaton has 87 states. [2020-10-24 14:20:48,855 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 175 transitions. [2020-10-24 14:20:48,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2020-10-24 14:20:48,856 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 14:20:48,856 INFO L422 BasicCegarLoop]: trace histogram [84, 84, 1, 1, 1, 1, 1, 1] [2020-10-24 14:20:49,066 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-24 14:20:49,068 INFO L429 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 14:20:49,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 14:20:49,069 INFO L82 PathProgramCache]: Analyzing trace with hash -1065585835, now seen corresponding path program 84 times [2020-10-24 14:20:49,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-24 14:20:49,069 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243523472] [2020-10-24 14:20:49,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 14:20:49,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 14:20:54,671 INFO L134 CoverageAnalysis]: Checked inductivity of 7056 backedges. 0 proven. 7056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 14:20:54,672 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243523472] [2020-10-24 14:20:54,672 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1615347857] [2020-10-24 14:20:54,672 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-24 14:20:54,945 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 85 check-sat command(s) [2020-10-24 14:20:54,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-24 14:20:54,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 629 conjuncts, 86 conjunts are in the unsatisfiable core [2020-10-24 14:20:54,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-24 14:20:55,027 INFO L134 CoverageAnalysis]: Checked inductivity of 7056 backedges. 0 proven. 7056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 14:20:55,027 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-24 14:20:55,028 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 87] total 88 [2020-10-24 14:20:55,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048018439] [2020-10-24 14:20:55,028 INFO L461 AbstractCegarLoop]: Interpolant automaton has 88 states [2020-10-24 14:20:55,029 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-24 14:20:55,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2020-10-24 14:20:55,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3828, Invalid=3828, Unknown=0, NotChecked=0, Total=7656 [2020-10-24 14:20:55,030 INFO L87 Difference]: Start difference. First operand 175 states and 175 transitions. Second operand 88 states. [2020-10-24 14:20:55,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 14:20:55,474 INFO L93 Difference]: Finished difference Result 182 states and 182 transitions. [2020-10-24 14:20:55,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2020-10-24 14:20:55,475 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 174 [2020-10-24 14:20:55,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 14:20:55,476 INFO L225 Difference]: With dead ends: 182 [2020-10-24 14:20:55,476 INFO L226 Difference]: Without dead ends: 178 [2020-10-24 14:20:55,477 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=3828, Invalid=3828, Unknown=0, NotChecked=0, Total=7656 [2020-10-24 14:20:55,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2020-10-24 14:20:55,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 177. [2020-10-24 14:20:55,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2020-10-24 14:20:55,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 177 transitions. [2020-10-24 14:20:55,481 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 177 transitions. Word has length 174 [2020-10-24 14:20:55,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 14:20:55,482 INFO L481 AbstractCegarLoop]: Abstraction has 177 states and 177 transitions. [2020-10-24 14:20:55,482 INFO L482 AbstractCegarLoop]: Interpolant automaton has 88 states. [2020-10-24 14:20:55,482 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 177 transitions. [2020-10-24 14:20:55,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2020-10-24 14:20:55,483 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 14:20:55,483 INFO L422 BasicCegarLoop]: trace histogram [85, 85, 1, 1, 1, 1, 1, 1] [2020-10-24 14:20:55,692 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable84 [2020-10-24 14:20:55,693 INFO L429 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 14:20:55,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 14:20:55,694 INFO L82 PathProgramCache]: Analyzing trace with hash -1772538665, now seen corresponding path program 85 times [2020-10-24 14:20:55,694 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-24 14:20:55,695 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55678679] [2020-10-24 14:20:55,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 14:20:55,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 14:21:01,480 INFO L134 CoverageAnalysis]: Checked inductivity of 7225 backedges. 0 proven. 7225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 14:21:01,482 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55678679] [2020-10-24 14:21:01,482 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [382380799] [2020-10-24 14:21:01,482 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-24 14:21:01,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 14:21:01,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 636 conjuncts, 87 conjunts are in the unsatisfiable core [2020-10-24 14:21:01,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-24 14:21:01,718 INFO L134 CoverageAnalysis]: Checked inductivity of 7225 backedges. 0 proven. 7225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 14:21:01,719 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-24 14:21:01,719 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [88, 88] total 89 [2020-10-24 14:21:01,720 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067448473] [2020-10-24 14:21:01,720 INFO L461 AbstractCegarLoop]: Interpolant automaton has 89 states [2020-10-24 14:21:01,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-24 14:21:01,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2020-10-24 14:21:01,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3916, Invalid=3916, Unknown=0, NotChecked=0, Total=7832 [2020-10-24 14:21:01,722 INFO L87 Difference]: Start difference. First operand 177 states and 177 transitions. Second operand 89 states. [2020-10-24 14:21:02,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 14:21:02,303 INFO L93 Difference]: Finished difference Result 184 states and 184 transitions. [2020-10-24 14:21:02,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2020-10-24 14:21:02,303 INFO L78 Accepts]: Start accepts. Automaton has 89 states. Word has length 176 [2020-10-24 14:21:02,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 14:21:02,304 INFO L225 Difference]: With dead ends: 184 [2020-10-24 14:21:02,304 INFO L226 Difference]: Without dead ends: 180 [2020-10-24 14:21:02,305 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=3916, Invalid=3916, Unknown=0, NotChecked=0, Total=7832 [2020-10-24 14:21:02,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2020-10-24 14:21:02,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 179. [2020-10-24 14:21:02,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2020-10-24 14:21:02,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 179 transitions. [2020-10-24 14:21:02,309 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 179 transitions. Word has length 176 [2020-10-24 14:21:02,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 14:21:02,309 INFO L481 AbstractCegarLoop]: Abstraction has 179 states and 179 transitions. [2020-10-24 14:21:02,309 INFO L482 AbstractCegarLoop]: Interpolant automaton has 89 states. [2020-10-24 14:21:02,310 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 179 transitions. [2020-10-24 14:21:02,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2020-10-24 14:21:02,310 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 14:21:02,310 INFO L422 BasicCegarLoop]: trace histogram [86, 86, 1, 1, 1, 1, 1, 1] [2020-10-24 14:21:02,511 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-24 14:21:02,511 INFO L429 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 14:21:02,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 14:21:02,512 INFO L82 PathProgramCache]: Analyzing trace with hash 1745591769, now seen corresponding path program 86 times [2020-10-24 14:21:02,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-24 14:21:02,513 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142032325] [2020-10-24 14:21:02,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 14:21:02,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 14:21:08,476 INFO L134 CoverageAnalysis]: Checked inductivity of 7396 backedges. 0 proven. 7396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 14:21:08,476 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142032325] [2020-10-24 14:21:08,476 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1972939572] [2020-10-24 14:21:08,476 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-24 14:21:08,629 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-24 14:21:08,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-24 14:21:08,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 643 conjuncts, 88 conjunts are in the unsatisfiable core [2020-10-24 14:21:08,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-24 14:21:08,689 INFO L134 CoverageAnalysis]: Checked inductivity of 7396 backedges. 0 proven. 7396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 14:21:08,689 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-24 14:21:08,690 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [89, 89] total 90 [2020-10-24 14:21:08,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84234471] [2020-10-24 14:21:08,691 INFO L461 AbstractCegarLoop]: Interpolant automaton has 90 states [2020-10-24 14:21:08,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-24 14:21:08,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2020-10-24 14:21:08,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4005, Invalid=4005, Unknown=0, NotChecked=0, Total=8010 [2020-10-24 14:21:08,692 INFO L87 Difference]: Start difference. First operand 179 states and 179 transitions. Second operand 90 states. [2020-10-24 14:21:09,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 14:21:09,226 INFO L93 Difference]: Finished difference Result 186 states and 186 transitions. [2020-10-24 14:21:09,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2020-10-24 14:21:09,227 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 178 [2020-10-24 14:21:09,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 14:21:09,228 INFO L225 Difference]: With dead ends: 186 [2020-10-24 14:21:09,228 INFO L226 Difference]: Without dead ends: 182 [2020-10-24 14:21:09,228 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=4005, Invalid=4005, Unknown=0, NotChecked=0, Total=8010 [2020-10-24 14:21:09,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2020-10-24 14:21:09,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 181. [2020-10-24 14:21:09,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2020-10-24 14:21:09,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 181 transitions. [2020-10-24 14:21:09,231 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 181 transitions. Word has length 178 [2020-10-24 14:21:09,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 14:21:09,232 INFO L481 AbstractCegarLoop]: Abstraction has 181 states and 181 transitions. [2020-10-24 14:21:09,232 INFO L482 AbstractCegarLoop]: Interpolant automaton has 90 states. [2020-10-24 14:21:09,232 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 181 transitions. [2020-10-24 14:21:09,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2020-10-24 14:21:09,232 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 14:21:09,233 INFO L422 BasicCegarLoop]: trace histogram [87, 87, 1, 1, 1, 1, 1, 1] [2020-10-24 14:21:09,434 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable86 [2020-10-24 14:21:09,435 INFO L429 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 14:21:09,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 14:21:09,435 INFO L82 PathProgramCache]: Analyzing trace with hash -1765290405, now seen corresponding path program 87 times [2020-10-24 14:21:09,436 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-24 14:21:09,436 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242480525] [2020-10-24 14:21:09,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 14:21:09,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 14:21:15,582 INFO L134 CoverageAnalysis]: Checked inductivity of 7569 backedges. 0 proven. 7569 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 14:21:15,582 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242480525] [2020-10-24 14:21:15,582 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2001939523] [2020-10-24 14:21:15,582 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-24 14:21:15,864 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 88 check-sat command(s) [2020-10-24 14:21:15,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-24 14:21:15,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 650 conjuncts, 89 conjunts are in the unsatisfiable core [2020-10-24 14:21:15,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-24 14:21:15,941 INFO L134 CoverageAnalysis]: Checked inductivity of 7569 backedges. 0 proven. 7569 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 14:21:15,941 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-24 14:21:15,942 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [90, 90] total 91 [2020-10-24 14:21:15,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005414737] [2020-10-24 14:21:15,942 INFO L461 AbstractCegarLoop]: Interpolant automaton has 91 states [2020-10-24 14:21:15,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-24 14:21:15,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2020-10-24 14:21:15,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4095, Invalid=4095, Unknown=0, NotChecked=0, Total=8190 [2020-10-24 14:21:15,943 INFO L87 Difference]: Start difference. First operand 181 states and 181 transitions. Second operand 91 states. [2020-10-24 14:21:16,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 14:21:16,418 INFO L93 Difference]: Finished difference Result 188 states and 188 transitions. [2020-10-24 14:21:16,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2020-10-24 14:21:16,419 INFO L78 Accepts]: Start accepts. Automaton has 91 states. Word has length 180 [2020-10-24 14:21:16,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 14:21:16,420 INFO L225 Difference]: With dead ends: 188 [2020-10-24 14:21:16,420 INFO L226 Difference]: Without dead ends: 184 [2020-10-24 14:21:16,421 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=4095, Invalid=4095, Unknown=0, NotChecked=0, Total=8190 [2020-10-24 14:21:16,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2020-10-24 14:21:16,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 183. [2020-10-24 14:21:16,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2020-10-24 14:21:16,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 183 transitions. [2020-10-24 14:21:16,426 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 183 transitions. Word has length 180 [2020-10-24 14:21:16,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 14:21:16,427 INFO L481 AbstractCegarLoop]: Abstraction has 183 states and 183 transitions. [2020-10-24 14:21:16,427 INFO L482 AbstractCegarLoop]: Interpolant automaton has 91 states. [2020-10-24 14:21:16,427 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 183 transitions. [2020-10-24 14:21:16,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2020-10-24 14:21:16,428 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 14:21:16,428 INFO L422 BasicCegarLoop]: trace histogram [88, 88, 1, 1, 1, 1, 1, 1] [2020-10-24 14:21:16,637 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2020-10-24 14:21:16,638 INFO L429 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 14:21:16,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 14:21:16,638 INFO L82 PathProgramCache]: Analyzing trace with hash 121235037, now seen corresponding path program 88 times [2020-10-24 14:21:16,639 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-24 14:21:16,639 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038027794] [2020-10-24 14:21:16,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 14:21:16,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 14:21:22,933 INFO L134 CoverageAnalysis]: Checked inductivity of 7744 backedges. 0 proven. 7744 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 14:21:22,933 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038027794] [2020-10-24 14:21:22,934 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [409959957] [2020-10-24 14:21:22,934 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-24 14:21:23,098 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-24 14:21:23,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-24 14:21:23,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 657 conjuncts, 90 conjunts are in the unsatisfiable core [2020-10-24 14:21:23,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-24 14:21:23,168 INFO L134 CoverageAnalysis]: Checked inductivity of 7744 backedges. 0 proven. 7744 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 14:21:23,169 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-24 14:21:23,169 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [91, 91] total 92 [2020-10-24 14:21:23,169 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68747855] [2020-10-24 14:21:23,169 INFO L461 AbstractCegarLoop]: Interpolant automaton has 92 states [2020-10-24 14:21:23,169 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-24 14:21:23,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2020-10-24 14:21:23,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4186, Invalid=4186, Unknown=0, NotChecked=0, Total=8372 [2020-10-24 14:21:23,172 INFO L87 Difference]: Start difference. First operand 183 states and 183 transitions. Second operand 92 states. [2020-10-24 14:21:23,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 14:21:23,630 INFO L93 Difference]: Finished difference Result 190 states and 190 transitions. [2020-10-24 14:21:23,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2020-10-24 14:21:23,631 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 182 [2020-10-24 14:21:23,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 14:21:23,632 INFO L225 Difference]: With dead ends: 190 [2020-10-24 14:21:23,632 INFO L226 Difference]: Without dead ends: 186 [2020-10-24 14:21:23,632 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=4186, Invalid=4186, Unknown=0, NotChecked=0, Total=8372 [2020-10-24 14:21:23,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-10-24 14:21:23,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 185. [2020-10-24 14:21:23,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2020-10-24 14:21:23,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 185 transitions. [2020-10-24 14:21:23,637 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 185 transitions. Word has length 182 [2020-10-24 14:21:23,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 14:21:23,637 INFO L481 AbstractCegarLoop]: Abstraction has 185 states and 185 transitions. [2020-10-24 14:21:23,637 INFO L482 AbstractCegarLoop]: Interpolant automaton has 92 states. [2020-10-24 14:21:23,637 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 185 transitions. [2020-10-24 14:21:23,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2020-10-24 14:21:23,638 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 14:21:23,639 INFO L422 BasicCegarLoop]: trace histogram [89, 89, 1, 1, 1, 1, 1, 1] [2020-10-24 14:21:23,850 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-24 14:21:23,850 INFO L429 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 14:21:23,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 14:21:23,851 INFO L82 PathProgramCache]: Analyzing trace with hash 595985887, now seen corresponding path program 89 times [2020-10-24 14:21:23,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-24 14:21:23,852 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904775051] [2020-10-24 14:21:23,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 14:21:23,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 14:21:30,346 INFO L134 CoverageAnalysis]: Checked inductivity of 7921 backedges. 0 proven. 7921 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 14:21:30,346 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904775051] [2020-10-24 14:21:30,346 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1077797920] [2020-10-24 14:21:30,346 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-24 14:21:30,574 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 90 check-sat command(s) [2020-10-24 14:21:30,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-24 14:21:30,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 664 conjuncts, 91 conjunts are in the unsatisfiable core [2020-10-24 14:21:30,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-24 14:21:30,665 INFO L134 CoverageAnalysis]: Checked inductivity of 7921 backedges. 0 proven. 7921 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 14:21:30,665 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-24 14:21:30,666 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [92, 92] total 93 [2020-10-24 14:21:30,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062074722] [2020-10-24 14:21:30,666 INFO L461 AbstractCegarLoop]: Interpolant automaton has 93 states [2020-10-24 14:21:30,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-24 14:21:30,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2020-10-24 14:21:30,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4278, Invalid=4278, Unknown=0, NotChecked=0, Total=8556 [2020-10-24 14:21:30,668 INFO L87 Difference]: Start difference. First operand 185 states and 185 transitions. Second operand 93 states. [2020-10-24 14:21:31,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 14:21:31,187 INFO L93 Difference]: Finished difference Result 192 states and 192 transitions. [2020-10-24 14:21:31,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2020-10-24 14:21:31,188 INFO L78 Accepts]: Start accepts. Automaton has 93 states. Word has length 184 [2020-10-24 14:21:31,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 14:21:31,189 INFO L225 Difference]: With dead ends: 192 [2020-10-24 14:21:31,190 INFO L226 Difference]: Without dead ends: 188 [2020-10-24 14:21:31,190 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=4278, Invalid=4278, Unknown=0, NotChecked=0, Total=8556 [2020-10-24 14:21:31,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2020-10-24 14:21:31,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 187. [2020-10-24 14:21:31,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2020-10-24 14:21:31,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 187 transitions. [2020-10-24 14:21:31,194 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 187 transitions. Word has length 184 [2020-10-24 14:21:31,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 14:21:31,195 INFO L481 AbstractCegarLoop]: Abstraction has 187 states and 187 transitions. [2020-10-24 14:21:31,195 INFO L482 AbstractCegarLoop]: Interpolant automaton has 93 states. [2020-10-24 14:21:31,195 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 187 transitions. [2020-10-24 14:21:31,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2020-10-24 14:21:31,196 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 14:21:31,197 INFO L422 BasicCegarLoop]: trace histogram [90, 90, 1, 1, 1, 1, 1, 1] [2020-10-24 14:21:31,410 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-24 14:21:31,411 INFO L429 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 14:21:31,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 14:21:31,411 INFO L82 PathProgramCache]: Analyzing trace with hash 1565019361, now seen corresponding path program 90 times [2020-10-24 14:21:31,412 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-24 14:21:31,412 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834720915] [2020-10-24 14:21:31,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 14:21:31,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 14:21:38,103 INFO L134 CoverageAnalysis]: Checked inductivity of 8100 backedges. 0 proven. 8100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 14:21:38,104 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834720915] [2020-10-24 14:21:38,104 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [710985053] [2020-10-24 14:21:38,104 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-24 14:21:38,386 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 91 check-sat command(s) [2020-10-24 14:21:38,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-24 14:21:38,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 671 conjuncts, 92 conjunts are in the unsatisfiable core [2020-10-24 14:21:38,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-24 14:21:38,469 INFO L134 CoverageAnalysis]: Checked inductivity of 8100 backedges. 0 proven. 8100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 14:21:38,469 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-24 14:21:38,470 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [93, 93] total 94 [2020-10-24 14:21:38,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817560504] [2020-10-24 14:21:38,470 INFO L461 AbstractCegarLoop]: Interpolant automaton has 94 states [2020-10-24 14:21:38,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-24 14:21:38,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2020-10-24 14:21:38,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4371, Invalid=4371, Unknown=0, NotChecked=0, Total=8742 [2020-10-24 14:21:38,471 INFO L87 Difference]: Start difference. First operand 187 states and 187 transitions. Second operand 94 states. [2020-10-24 14:21:39,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 14:21:39,072 INFO L93 Difference]: Finished difference Result 194 states and 194 transitions. [2020-10-24 14:21:39,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2020-10-24 14:21:39,072 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 186 [2020-10-24 14:21:39,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 14:21:39,073 INFO L225 Difference]: With dead ends: 194 [2020-10-24 14:21:39,073 INFO L226 Difference]: Without dead ends: 190 [2020-10-24 14:21:39,074 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=4371, Invalid=4371, Unknown=0, NotChecked=0, Total=8742 [2020-10-24 14:21:39,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2020-10-24 14:21:39,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 189. [2020-10-24 14:21:39,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2020-10-24 14:21:39,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 189 transitions. [2020-10-24 14:21:39,078 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 189 transitions. Word has length 186 [2020-10-24 14:21:39,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 14:21:39,078 INFO L481 AbstractCegarLoop]: Abstraction has 189 states and 189 transitions. [2020-10-24 14:21:39,078 INFO L482 AbstractCegarLoop]: Interpolant automaton has 94 states. [2020-10-24 14:21:39,078 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 189 transitions. [2020-10-24 14:21:39,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2020-10-24 14:21:39,079 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 14:21:39,079 INFO L422 BasicCegarLoop]: trace histogram [91, 91, 1, 1, 1, 1, 1, 1] [2020-10-24 14:21:39,279 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-24 14:21:39,280 INFO L429 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 14:21:39,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 14:21:39,281 INFO L82 PathProgramCache]: Analyzing trace with hash 798284643, now seen corresponding path program 91 times [2020-10-24 14:21:39,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-24 14:21:39,281 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300558121] [2020-10-24 14:21:39,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 14:21:39,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 14:21:46,160 INFO L134 CoverageAnalysis]: Checked inductivity of 8281 backedges. 0 proven. 8281 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 14:21:46,160 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300558121] [2020-10-24 14:21:46,161 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1116317019] [2020-10-24 14:21:46,161 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-24 14:21:46,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 14:21:46,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 678 conjuncts, 93 conjunts are in the unsatisfiable core [2020-10-24 14:21:46,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-24 14:21:46,401 INFO L134 CoverageAnalysis]: Checked inductivity of 8281 backedges. 0 proven. 8281 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 14:21:46,401 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-24 14:21:46,402 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [94, 94] total 95 [2020-10-24 14:21:46,402 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814069325] [2020-10-24 14:21:46,402 INFO L461 AbstractCegarLoop]: Interpolant automaton has 95 states [2020-10-24 14:21:46,402 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-24 14:21:46,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2020-10-24 14:21:46,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4465, Invalid=4465, Unknown=0, NotChecked=0, Total=8930 [2020-10-24 14:21:46,403 INFO L87 Difference]: Start difference. First operand 189 states and 189 transitions. Second operand 95 states. [2020-10-24 14:21:46,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 14:21:46,921 INFO L93 Difference]: Finished difference Result 196 states and 196 transitions. [2020-10-24 14:21:46,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2020-10-24 14:21:46,922 INFO L78 Accepts]: Start accepts. Automaton has 95 states. Word has length 188 [2020-10-24 14:21:46,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 14:21:46,923 INFO L225 Difference]: With dead ends: 196 [2020-10-24 14:21:46,923 INFO L226 Difference]: Without dead ends: 192 [2020-10-24 14:21:46,924 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 188 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=4465, Invalid=4465, Unknown=0, NotChecked=0, Total=8930 [2020-10-24 14:21:46,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-10-24 14:21:46,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 191. [2020-10-24 14:21:46,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2020-10-24 14:21:46,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 191 transitions. [2020-10-24 14:21:46,927 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 191 transitions. Word has length 188 [2020-10-24 14:21:46,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 14:21:46,927 INFO L481 AbstractCegarLoop]: Abstraction has 191 states and 191 transitions. [2020-10-24 14:21:46,927 INFO L482 AbstractCegarLoop]: Interpolant automaton has 95 states. [2020-10-24 14:21:46,927 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 191 transitions. [2020-10-24 14:21:46,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2020-10-24 14:21:46,928 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 14:21:46,928 INFO L422 BasicCegarLoop]: trace histogram [92, 92, 1, 1, 1, 1, 1, 1] [2020-10-24 14:21:47,129 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,92 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-24 14:21:47,130 INFO L429 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 14:21:47,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 14:21:47,131 INFO L82 PathProgramCache]: Analyzing trace with hash -1594371739, now seen corresponding path program 92 times [2020-10-24 14:21:47,131 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-24 14:21:47,131 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52130558] [2020-10-24 14:21:47,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 14:21:47,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 14:21:54,221 INFO L134 CoverageAnalysis]: Checked inductivity of 8464 backedges. 0 proven. 8464 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 14:21:54,221 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52130558] [2020-10-24 14:21:54,222 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1326075223] [2020-10-24 14:21:54,222 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-24 14:21:54,403 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-24 14:21:54,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-24 14:21:54,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 685 conjuncts, 94 conjunts are in the unsatisfiable core [2020-10-24 14:21:54,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-24 14:21:54,469 INFO L134 CoverageAnalysis]: Checked inductivity of 8464 backedges. 0 proven. 8464 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 14:21:54,469 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-24 14:21:54,469 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 95] total 96 [2020-10-24 14:21:54,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671244073] [2020-10-24 14:21:54,470 INFO L461 AbstractCegarLoop]: Interpolant automaton has 96 states [2020-10-24 14:21:54,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-24 14:21:54,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2020-10-24 14:21:54,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2020-10-24 14:21:54,471 INFO L87 Difference]: Start difference. First operand 191 states and 191 transitions. Second operand 96 states. [2020-10-24 14:21:54,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 14:21:54,997 INFO L93 Difference]: Finished difference Result 198 states and 198 transitions. [2020-10-24 14:21:54,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2020-10-24 14:21:54,998 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 190 [2020-10-24 14:21:54,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 14:21:54,999 INFO L225 Difference]: With dead ends: 198 [2020-10-24 14:21:55,000 INFO L226 Difference]: Without dead ends: 194 [2020-10-24 14:21:55,000 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2020-10-24 14:21:55,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2020-10-24 14:21:55,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 193. [2020-10-24 14:21:55,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2020-10-24 14:21:55,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 193 transitions. [2020-10-24 14:21:55,004 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 193 transitions. Word has length 190 [2020-10-24 14:21:55,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 14:21:55,004 INFO L481 AbstractCegarLoop]: Abstraction has 193 states and 193 transitions. [2020-10-24 14:21:55,004 INFO L482 AbstractCegarLoop]: Interpolant automaton has 96 states. [2020-10-24 14:21:55,004 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 193 transitions. [2020-10-24 14:21:55,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2020-10-24 14:21:55,005 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 14:21:55,005 INFO L422 BasicCegarLoop]: trace histogram [93, 93, 1, 1, 1, 1, 1, 1] [2020-10-24 14:21:55,206 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-24 14:21:55,206 INFO L429 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 14:21:55,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 14:21:55,207 INFO L82 PathProgramCache]: Analyzing trace with hash 1165315815, now seen corresponding path program 93 times [2020-10-24 14:21:55,207 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-24 14:21:55,208 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945334511] [2020-10-24 14:21:55,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 14:21:55,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 14:22:02,502 INFO L134 CoverageAnalysis]: Checked inductivity of 8649 backedges. 0 proven. 8649 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 14:22:02,502 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945334511] [2020-10-24 14:22:02,502 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [22066551] [2020-10-24 14:22:02,502 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-24 14:22:02,817 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 94 check-sat command(s) [2020-10-24 14:22:02,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-24 14:22:02,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 692 conjuncts, 95 conjunts are in the unsatisfiable core [2020-10-24 14:22:02,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-24 14:22:02,885 INFO L134 CoverageAnalysis]: Checked inductivity of 8649 backedges. 0 proven. 8649 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 14:22:02,885 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-24 14:22:02,885 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 96] total 97 [2020-10-24 14:22:02,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030564924] [2020-10-24 14:22:02,886 INFO L461 AbstractCegarLoop]: Interpolant automaton has 97 states [2020-10-24 14:22:02,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-24 14:22:02,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2020-10-24 14:22:02,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2020-10-24 14:22:02,887 INFO L87 Difference]: Start difference. First operand 193 states and 193 transitions. Second operand 97 states. [2020-10-24 14:22:03,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 14:22:03,569 INFO L93 Difference]: Finished difference Result 200 states and 200 transitions. [2020-10-24 14:22:03,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2020-10-24 14:22:03,570 INFO L78 Accepts]: Start accepts. Automaton has 97 states. Word has length 192 [2020-10-24 14:22:03,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 14:22:03,571 INFO L225 Difference]: With dead ends: 200 [2020-10-24 14:22:03,571 INFO L226 Difference]: Without dead ends: 196 [2020-10-24 14:22:03,573 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2020-10-24 14:22:03,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-10-24 14:22:03,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 195. [2020-10-24 14:22:03,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2020-10-24 14:22:03,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 195 transitions. [2020-10-24 14:22:03,577 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 195 transitions. Word has length 192 [2020-10-24 14:22:03,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 14:22:03,578 INFO L481 AbstractCegarLoop]: Abstraction has 195 states and 195 transitions. [2020-10-24 14:22:03,578 INFO L482 AbstractCegarLoop]: Interpolant automaton has 97 states. [2020-10-24 14:22:03,578 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 195 transitions. [2020-10-24 14:22:03,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2020-10-24 14:22:03,579 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 14:22:03,579 INFO L422 BasicCegarLoop]: trace histogram [94, 94, 1, 1, 1, 1, 1, 1] [2020-10-24 14:22:03,790 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,94 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-24 14:22:03,791 INFO L429 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 14:22:03,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 14:22:03,791 INFO L82 PathProgramCache]: Analyzing trace with hash -1064733719, now seen corresponding path program 94 times [2020-10-24 14:22:03,792 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-24 14:22:03,792 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534240791] [2020-10-24 14:22:03,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 14:22:03,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 14:22:11,334 INFO L134 CoverageAnalysis]: Checked inductivity of 8836 backedges. 0 proven. 8836 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 14:22:11,334 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534240791] [2020-10-24 14:22:11,334 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1469302362] [2020-10-24 14:22:11,335 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-24 14:22:11,499 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-24 14:22:11,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-24 14:22:11,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 699 conjuncts, 96 conjunts are in the unsatisfiable core [2020-10-24 14:22:11,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-24 14:22:11,578 INFO L134 CoverageAnalysis]: Checked inductivity of 8836 backedges. 0 proven. 8836 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 14:22:11,578 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-24 14:22:11,579 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 97] total 98 [2020-10-24 14:22:11,579 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791072132] [2020-10-24 14:22:11,579 INFO L461 AbstractCegarLoop]: Interpolant automaton has 98 states [2020-10-24 14:22:11,580 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-24 14:22:11,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2020-10-24 14:22:11,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4753, Invalid=4753, Unknown=0, NotChecked=0, Total=9506 [2020-10-24 14:22:11,581 INFO L87 Difference]: Start difference. First operand 195 states and 195 transitions. Second operand 98 states. [2020-10-24 14:22:12,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 14:22:12,190 INFO L93 Difference]: Finished difference Result 202 states and 202 transitions. [2020-10-24 14:22:12,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2020-10-24 14:22:12,191 INFO L78 Accepts]: Start accepts. Automaton has 98 states. Word has length 194 [2020-10-24 14:22:12,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 14:22:12,192 INFO L225 Difference]: With dead ends: 202 [2020-10-24 14:22:12,192 INFO L226 Difference]: Without dead ends: 198 [2020-10-24 14:22:12,193 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=4753, Invalid=4753, Unknown=0, NotChecked=0, Total=9506 [2020-10-24 14:22:12,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2020-10-24 14:22:12,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 197. [2020-10-24 14:22:12,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 197 states. [2020-10-24 14:22:12,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 197 transitions. [2020-10-24 14:22:12,198 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 197 transitions. Word has length 194 [2020-10-24 14:22:12,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 14:22:12,199 INFO L481 AbstractCegarLoop]: Abstraction has 197 states and 197 transitions. [2020-10-24 14:22:12,199 INFO L482 AbstractCegarLoop]: Interpolant automaton has 98 states. [2020-10-24 14:22:12,199 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 197 transitions. [2020-10-24 14:22:12,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2020-10-24 14:22:12,200 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 14:22:12,200 INFO L422 BasicCegarLoop]: trace histogram [95, 95, 1, 1, 1, 1, 1, 1] [2020-10-24 14:22:12,413 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-24 14:22:12,414 INFO L429 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 14:22:12,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 14:22:12,414 INFO L82 PathProgramCache]: Analyzing trace with hash -953655189, now seen corresponding path program 95 times [2020-10-24 14:22:12,415 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-24 14:22:12,415 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075792897] [2020-10-24 14:22:12,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 14:22:12,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 14:22:20,197 INFO L134 CoverageAnalysis]: Checked inductivity of 9025 backedges. 0 proven. 9025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 14:22:20,197 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075792897] [2020-10-24 14:22:20,197 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [222511085] [2020-10-24 14:22:20,197 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-24 14:22:20,432 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 96 check-sat command(s) [2020-10-24 14:22:20,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-24 14:22:20,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 706 conjuncts, 97 conjunts are in the unsatisfiable core [2020-10-24 14:22:20,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-24 14:22:20,518 INFO L134 CoverageAnalysis]: Checked inductivity of 9025 backedges. 0 proven. 9025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 14:22:20,519 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-24 14:22:20,519 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [98, 98] total 99 [2020-10-24 14:22:20,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410837446] [2020-10-24 14:22:20,519 INFO L461 AbstractCegarLoop]: Interpolant automaton has 99 states [2020-10-24 14:22:20,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-24 14:22:20,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2020-10-24 14:22:20,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4851, Invalid=4851, Unknown=0, NotChecked=0, Total=9702 [2020-10-24 14:22:20,521 INFO L87 Difference]: Start difference. First operand 197 states and 197 transitions. Second operand 99 states. [2020-10-24 14:22:21,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 14:22:21,095 INFO L93 Difference]: Finished difference Result 204 states and 204 transitions. [2020-10-24 14:22:21,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2020-10-24 14:22:21,098 INFO L78 Accepts]: Start accepts. Automaton has 99 states. Word has length 196 [2020-10-24 14:22:21,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 14:22:21,099 INFO L225 Difference]: With dead ends: 204 [2020-10-24 14:22:21,099 INFO L226 Difference]: Without dead ends: 200 [2020-10-24 14:22:21,100 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=4851, Invalid=4851, Unknown=0, NotChecked=0, Total=9702 [2020-10-24 14:22:21,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2020-10-24 14:22:21,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 199. [2020-10-24 14:22:21,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2020-10-24 14:22:21,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 199 transitions. [2020-10-24 14:22:21,104 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 199 transitions. Word has length 196 [2020-10-24 14:22:21,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 14:22:21,105 INFO L481 AbstractCegarLoop]: Abstraction has 199 states and 199 transitions. [2020-10-24 14:22:21,105 INFO L482 AbstractCegarLoop]: Interpolant automaton has 99 states. [2020-10-24 14:22:21,105 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 199 transitions. [2020-10-24 14:22:21,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2020-10-24 14:22:21,106 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 14:22:21,106 INFO L422 BasicCegarLoop]: trace histogram [96, 96, 1, 1, 1, 1, 1, 1] [2020-10-24 14:22:21,306 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-24 14:22:21,307 INFO L429 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 14:22:21,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 14:22:21,307 INFO L82 PathProgramCache]: Analyzing trace with hash -1581370259, now seen corresponding path program 96 times [2020-10-24 14:22:21,308 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-24 14:22:21,308 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987608440] [2020-10-24 14:22:21,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 14:22:21,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 14:22:29,380 INFO L134 CoverageAnalysis]: Checked inductivity of 9216 backedges. 0 proven. 9216 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 14:22:29,380 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987608440] [2020-10-24 14:22:29,380 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003506313] [2020-10-24 14:22:29,380 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-24 14:22:29,701 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 97 check-sat command(s) [2020-10-24 14:22:29,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-24 14:22:29,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 713 conjuncts, 98 conjunts are in the unsatisfiable core [2020-10-24 14:22:29,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-24 14:22:29,772 INFO L134 CoverageAnalysis]: Checked inductivity of 9216 backedges. 0 proven. 9216 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 14:22:29,772 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-24 14:22:29,772 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [99, 99] total 100 [2020-10-24 14:22:29,773 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461071142] [2020-10-24 14:22:29,773 INFO L461 AbstractCegarLoop]: Interpolant automaton has 100 states [2020-10-24 14:22:29,773 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-24 14:22:29,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2020-10-24 14:22:29,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4950, Invalid=4950, Unknown=0, NotChecked=0, Total=9900 [2020-10-24 14:22:29,774 INFO L87 Difference]: Start difference. First operand 199 states and 199 transitions. Second operand 100 states. [2020-10-24 14:22:30,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 14:22:30,387 INFO L93 Difference]: Finished difference Result 206 states and 206 transitions. [2020-10-24 14:22:30,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2020-10-24 14:22:30,388 INFO L78 Accepts]: Start accepts. Automaton has 100 states. Word has length 198 [2020-10-24 14:22:30,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 14:22:30,389 INFO L225 Difference]: With dead ends: 206 [2020-10-24 14:22:30,389 INFO L226 Difference]: Without dead ends: 202 [2020-10-24 14:22:30,390 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 198 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=4950, Invalid=4950, Unknown=0, NotChecked=0, Total=9900 [2020-10-24 14:22:30,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2020-10-24 14:22:30,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 201. [2020-10-24 14:22:30,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 201 states. [2020-10-24 14:22:30,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 201 transitions. [2020-10-24 14:22:30,393 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 201 transitions. Word has length 198 [2020-10-24 14:22:30,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 14:22:30,393 INFO L481 AbstractCegarLoop]: Abstraction has 201 states and 201 transitions. [2020-10-24 14:22:30,393 INFO L482 AbstractCegarLoop]: Interpolant automaton has 100 states. [2020-10-24 14:22:30,393 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 201 transitions. [2020-10-24 14:22:30,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2020-10-24 14:22:30,394 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 14:22:30,394 INFO L422 BasicCegarLoop]: trace histogram [97, 97, 1, 1, 1, 1, 1, 1] [2020-10-24 14:22:30,595 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable96 [2020-10-24 14:22:30,595 INFO L429 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 14:22:30,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 14:22:30,596 INFO L82 PathProgramCache]: Analyzing trace with hash 774836207, now seen corresponding path program 97 times [2020-10-24 14:22:30,596 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-24 14:22:30,596 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897479010] [2020-10-24 14:22:30,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 14:22:30,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 14:22:38,892 INFO L134 CoverageAnalysis]: Checked inductivity of 9409 backedges. 0 proven. 9409 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 14:22:38,892 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897479010] [2020-10-24 14:22:38,893 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1352399769] [2020-10-24 14:22:38,893 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-24 14:22:39,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 14:22:39,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 720 conjuncts, 99 conjunts are in the unsatisfiable core [2020-10-24 14:22:39,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-24 14:22:39,144 INFO L134 CoverageAnalysis]: Checked inductivity of 9409 backedges. 0 proven. 9409 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 14:22:39,145 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-24 14:22:39,145 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [100, 100] total 101 [2020-10-24 14:22:39,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17435731] [2020-10-24 14:22:39,145 INFO L461 AbstractCegarLoop]: Interpolant automaton has 101 states [2020-10-24 14:22:39,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-24 14:22:39,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2020-10-24 14:22:39,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5050, Invalid=5050, Unknown=0, NotChecked=0, Total=10100 [2020-10-24 14:22:39,147 INFO L87 Difference]: Start difference. First operand 201 states and 201 transitions. Second operand 101 states. [2020-10-24 14:22:39,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 14:22:39,829 INFO L93 Difference]: Finished difference Result 208 states and 208 transitions. [2020-10-24 14:22:39,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2020-10-24 14:22:39,830 INFO L78 Accepts]: Start accepts. Automaton has 101 states. Word has length 200 [2020-10-24 14:22:39,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 14:22:39,831 INFO L225 Difference]: With dead ends: 208 [2020-10-24 14:22:39,831 INFO L226 Difference]: Without dead ends: 204 [2020-10-24 14:22:39,832 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 299 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=5050, Invalid=5050, Unknown=0, NotChecked=0, Total=10100 [2020-10-24 14:22:39,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2020-10-24 14:22:39,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 203. [2020-10-24 14:22:39,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2020-10-24 14:22:39,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 203 transitions. [2020-10-24 14:22:39,835 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 203 transitions. Word has length 200 [2020-10-24 14:22:39,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 14:22:39,836 INFO L481 AbstractCegarLoop]: Abstraction has 203 states and 203 transitions. [2020-10-24 14:22:39,836 INFO L482 AbstractCegarLoop]: Interpolant automaton has 101 states. [2020-10-24 14:22:39,836 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 203 transitions. [2020-10-24 14:22:39,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2020-10-24 14:22:39,836 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 14:22:39,837 INFO L422 BasicCegarLoop]: trace histogram [98, 98, 1, 1, 1, 1, 1, 1] [2020-10-24 14:22:40,037 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,98 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-24 14:22:40,037 INFO L429 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 14:22:40,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 14:22:40,038 INFO L82 PathProgramCache]: Analyzing trace with hash 1641485041, now seen corresponding path program 98 times [2020-10-24 14:22:40,039 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-24 14:22:40,039 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177200055] [2020-10-24 14:22:40,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 14:22:40,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 14:22:48,635 INFO L134 CoverageAnalysis]: Checked inductivity of 9604 backedges. 0 proven. 9604 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 14:22:48,635 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177200055] [2020-10-24 14:22:48,635 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1393594589] [2020-10-24 14:22:48,635 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-24 14:22:48,804 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-24 14:22:48,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-24 14:22:48,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 727 conjuncts, 100 conjunts are in the unsatisfiable core [2020-10-24 14:22:48,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-24 14:22:48,890 INFO L134 CoverageAnalysis]: Checked inductivity of 9604 backedges. 0 proven. 9604 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 14:22:48,891 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-24 14:22:48,891 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 101] total 102 [2020-10-24 14:22:48,891 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352487212] [2020-10-24 14:22:48,892 INFO L461 AbstractCegarLoop]: Interpolant automaton has 102 states [2020-10-24 14:22:48,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-24 14:22:48,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2020-10-24 14:22:48,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2020-10-24 14:22:48,893 INFO L87 Difference]: Start difference. First operand 203 states and 203 transitions. Second operand 102 states. [2020-10-24 14:22:49,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 14:22:49,626 INFO L93 Difference]: Finished difference Result 210 states and 210 transitions. [2020-10-24 14:22:49,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2020-10-24 14:22:49,627 INFO L78 Accepts]: Start accepts. Automaton has 102 states. Word has length 202 [2020-10-24 14:22:49,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 14:22:49,628 INFO L225 Difference]: With dead ends: 210 [2020-10-24 14:22:49,628 INFO L226 Difference]: Without dead ends: 206 [2020-10-24 14:22:49,629 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 302 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2020-10-24 14:22:49,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2020-10-24 14:22:49,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 205. [2020-10-24 14:22:49,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 205 states. [2020-10-24 14:22:49,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 205 transitions. [2020-10-24 14:22:49,633 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 205 transitions. Word has length 202 [2020-10-24 14:22:49,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 14:22:49,633 INFO L481 AbstractCegarLoop]: Abstraction has 205 states and 205 transitions. [2020-10-24 14:22:49,633 INFO L482 AbstractCegarLoop]: Interpolant automaton has 102 states. [2020-10-24 14:22:49,633 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 205 transitions. [2020-10-24 14:22:49,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2020-10-24 14:22:49,634 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 14:22:49,634 INFO L422 BasicCegarLoop]: trace histogram [99, 99, 1, 1, 1, 1, 1, 1] [2020-10-24 14:22:49,835 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-24 14:22:49,835 INFO L429 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 14:22:49,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 14:22:49,836 INFO L82 PathProgramCache]: Analyzing trace with hash 1267359091, now seen corresponding path program 99 times [2020-10-24 14:22:49,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-24 14:22:49,836 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416938116] [2020-10-24 14:22:49,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 14:22:49,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 14:22:58,695 INFO L134 CoverageAnalysis]: Checked inductivity of 9801 backedges. 0 proven. 9801 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 14:22:58,696 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416938116] [2020-10-24 14:22:58,696 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1617045102] [2020-10-24 14:22:58,696 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-24 14:22:59,028 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 100 check-sat command(s) [2020-10-24 14:22:59,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-24 14:22:59,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 734 conjuncts, 101 conjunts are in the unsatisfiable core [2020-10-24 14:22:59,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-24 14:22:59,113 INFO L134 CoverageAnalysis]: Checked inductivity of 9801 backedges. 0 proven. 9801 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 14:22:59,114 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-24 14:22:59,114 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [102, 102] total 103 [2020-10-24 14:22:59,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219983357] [2020-10-24 14:22:59,115 INFO L461 AbstractCegarLoop]: Interpolant automaton has 103 states [2020-10-24 14:22:59,115 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-24 14:22:59,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2020-10-24 14:22:59,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5253, Invalid=5253, Unknown=0, NotChecked=0, Total=10506 [2020-10-24 14:22:59,116 INFO L87 Difference]: Start difference. First operand 205 states and 205 transitions. Second operand 103 states. [2020-10-24 14:22:59,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 14:22:59,804 INFO L93 Difference]: Finished difference Result 211 states and 211 transitions. [2020-10-24 14:22:59,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2020-10-24 14:22:59,805 INFO L78 Accepts]: Start accepts. Automaton has 103 states. Word has length 204 [2020-10-24 14:22:59,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 14:22:59,807 INFO L225 Difference]: With dead ends: 211 [2020-10-24 14:22:59,807 INFO L226 Difference]: Without dead ends: 207 [2020-10-24 14:22:59,808 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 305 GetRequests, 204 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=5253, Invalid=5253, Unknown=0, NotChecked=0, Total=10506 [2020-10-24 14:22:59,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2020-10-24 14:22:59,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 207. [2020-10-24 14:22:59,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 207 states. [2020-10-24 14:22:59,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 207 transitions. [2020-10-24 14:22:59,813 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 207 transitions. Word has length 204 [2020-10-24 14:22:59,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 14:22:59,814 INFO L481 AbstractCegarLoop]: Abstraction has 207 states and 207 transitions. [2020-10-24 14:22:59,814 INFO L482 AbstractCegarLoop]: Interpolant automaton has 103 states. [2020-10-24 14:22:59,814 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 207 transitions. [2020-10-24 14:22:59,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2020-10-24 14:22:59,815 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 14:22:59,816 INFO L422 BasicCegarLoop]: trace histogram [100, 100, 1, 1, 1, 1, 1, 1] [2020-10-24 14:23:00,029 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2020-10-24 14:23:00,030 INFO L429 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 14:23:00,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 14:23:00,030 INFO L82 PathProgramCache]: Analyzing trace with hash -1785393291, now seen corresponding path program 100 times [2020-10-24 14:23:00,031 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-24 14:23:00,031 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442817826] [2020-10-24 14:23:00,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 14:23:00,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-24 14:23:00,063 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-24 14:23:00,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-24 14:23:00,171 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-24 14:23:00,234 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-24 14:23:00,235 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-24 14:23:00,235 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2020-10-24 14:23:00,412 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.10 02:23:00 BoogieIcfgContainer [2020-10-24 14:23:00,412 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-24 14:23:00,413 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-24 14:23:00,413 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-24 14:23:00,414 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-24 14:23:00,414 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 02:17:21" (3/4) ... [2020-10-24 14:23:00,418 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-10-24 14:23:00,418 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-24 14:23:00,420 INFO L168 Benchmark]: Toolchain (without parser) took 339269.41 ms. Allocated memory was 39.8 MB in the beginning and 264.2 MB in the end (delta: 224.4 MB). Free memory was 15.9 MB in the beginning and 96.1 MB in the end (delta: -80.1 MB). Peak memory consumption was 145.5 MB. Max. memory is 16.1 GB. [2020-10-24 14:23:00,422 INFO L168 Benchmark]: CDTParser took 0.33 ms. Allocated memory is still 39.8 MB. Free memory is still 24.7 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-10-24 14:23:00,422 INFO L168 Benchmark]: CACSL2BoogieTranslator took 351.52 ms. Allocated memory was 39.8 MB in the beginning and 48.2 MB in the end (delta: 8.4 MB). Free memory was 15.4 MB in the beginning and 23.4 MB in the end (delta: -8.1 MB). Peak memory consumption was 3.5 MB. Max. memory is 16.1 GB. [2020-10-24 14:23:00,423 INFO L168 Benchmark]: Boogie Procedure Inliner took 45.63 ms. Allocated memory is still 48.2 MB. Free memory was 23.4 MB in the beginning and 22.1 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-10-24 14:23:00,423 INFO L168 Benchmark]: Boogie Preprocessor took 29.33 ms. Allocated memory is still 48.2 MB. Free memory was 22.1 MB in the beginning and 21.0 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-10-24 14:23:00,424 INFO L168 Benchmark]: RCFGBuilder took 370.21 ms. Allocated memory is still 48.2 MB. Free memory was 21.0 MB in the beginning and 22.6 MB in the end (delta: -1.6 MB). Peak memory consumption was 4.9 MB. Max. memory is 16.1 GB. [2020-10-24 14:23:00,424 INFO L168 Benchmark]: TraceAbstraction took 338453.81 ms. Allocated memory was 48.2 MB in the beginning and 264.2 MB in the end (delta: 216.0 MB). Free memory was 22.0 MB in the beginning and 96.1 MB in the end (delta: -74.1 MB). Peak memory consumption was 141.4 MB. Max. memory is 16.1 GB. [2020-10-24 14:23:00,425 INFO L168 Benchmark]: Witness Printer took 5.52 ms. Allocated memory is still 264.2 MB. Free memory is still 96.1 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-10-24 14:23:00,427 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.33 ms. Allocated memory is still 39.8 MB. Free memory is still 24.7 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 351.52 ms. Allocated memory was 39.8 MB in the beginning and 48.2 MB in the end (delta: 8.4 MB). Free memory was 15.4 MB in the beginning and 23.4 MB in the end (delta: -8.1 MB). Peak memory consumption was 3.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 45.63 ms. Allocated memory is still 48.2 MB. Free memory was 23.4 MB in the beginning and 22.1 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 29.33 ms. Allocated memory is still 48.2 MB. Free memory was 22.1 MB in the beginning and 21.0 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 370.21 ms. Allocated memory is still 48.2 MB. Free memory was 21.0 MB in the beginning and 22.6 MB in the end (delta: -1.6 MB). Peak memory consumption was 4.9 MB. Max. memory is 16.1 GB. * TraceAbstraction took 338453.81 ms. Allocated memory was 48.2 MB in the beginning and 264.2 MB in the end (delta: 216.0 MB). Free memory was 22.0 MB in the beginning and 96.1 MB in the end (delta: -74.1 MB). Peak memory consumption was 141.4 MB. Max. memory is 16.1 GB. * Witness Printer took 5.52 ms. Allocated memory is still 264.2 MB. Free memory is still 96.1 MB. There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 3]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of someBinaryArithmeticDOUBLE_SMToperation at line 22, overapproximation of someBinaryDOUBLE_SMTComparisonOperation at line 27. Possible FailurePath: [L16] double x0, x1, x2; [L17] int i; [L19] x0 = 11. / 2. [L20] x1 = 61. / 11. [L21] i = 0 [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND FALSE !(i < 100) [L12] COND TRUE !(cond) [L3] __assert_fail("0", "Muller_Kahan.c", 3, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 13 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 338.1s, OverallIterations: 101, TraceHistogramMax: 100, AutomataDifference: 27.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 604 SDtfs, 5050 SDslu, 14152 SDs, 0 SdLazy, 13904 SolverSat, 150 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 14.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 15645 GetRequests, 10496 SyntacticMatches, 0 SemanticMatches, 5149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9702 ImplicationChecksByTransitivity, 263.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=207occurred in iteration=100, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.4s AutomataMinimizationTime, 100 MinimizatonAttempts, 99 StatesRemovedByMinimization, 99 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 3.0s SsaConstructionTime, 10.5s SatisfiabilityAnalysisTime, 271.5s InterpolantComputationTime, 21200 NumberOfCodeBlocks, 21200 NumberOfCodeBlocksAsserted, 2716 NumberOfCheckSat, 20795 ConstructedInterpolants, 0 QuantifiedInterpolants, 8322965 SizeOfPredicates, 99 NumberOfNonLiveVariables, 38709 ConjunctsInSsa, 5148 ConjunctsInUnsatCore, 199 InterpolantComputations, 1 PerfectInterpolantSequences, 0/656700 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 could not prove your program: unable to determine feasibility of some traces Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.0-ee8e70e [2020-10-24 14:23:02,917 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2020-10-24 14:23:02,973 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-24 14:23:02,975 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-24 14:23:02,976 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-24 14:23:02,978 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-24 14:23:02,980 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-24 14:23:02,981 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-24 14:23:02,984 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-24 14:23:02,987 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-24 14:23:02,992 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-24 14:23:02,997 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-24 14:23:02,998 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-24 14:23:03,000 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-24 14:23:03,003 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-24 14:23:03,004 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-24 14:23:03,004 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-24 14:23:03,017 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-24 14:23:03,018 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-24 14:23:03,019 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-24 14:23:03,020 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-24 14:23:03,021 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-24 14:23:03,022 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-24 14:23:03,023 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-24 14:23:03,025 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-24 14:23:03,025 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-24 14:23:03,026 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-24 14:23:03,027 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-24 14:23:03,027 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-24 14:23:03,028 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-24 14:23:03,029 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-24 14:23:03,031 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2020-10-24 14:23:03,059 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-24 14:23:03,059 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-24 14:23:03,061 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-24 14:23:03,062 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-24 14:23:03,062 INFO L138 SettingsManager]: * Use SBE=true [2020-10-24 14:23:03,062 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-24 14:23:03,063 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-24 14:23:03,063 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-24 14:23:03,063 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-24 14:23:03,064 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-24 14:23:03,064 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-24 14:23:03,064 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-24 14:23:03,065 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2020-10-24 14:23:03,065 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2020-10-24 14:23:03,065 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-24 14:23:03,066 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-24 14:23:03,066 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-24 14:23:03,066 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-24 14:23:03,066 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-24 14:23:03,067 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-24 14:23:03,067 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-24 14:23:03,067 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-24 14:23:03,068 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-24 14:23:03,068 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-24 14:23:03,068 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-24 14:23:03,069 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-24 14:23:03,069 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2020-10-24 14:23:03,069 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2020-10-24 14:23:03,070 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-24 14:23:03,070 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-24 14:23:03,070 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-10-24 14:23:03,071 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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-2/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 34d9ef61eabdd9c5759553acd1add875b11b0827 [2020-10-24 14:23:03,541 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-24 14:23:03,595 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-24 14:23:03,599 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-24 14:23:03,601 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-24 14:23:03,602 INFO L275 PluginConnector]: CDTParser initialized [2020-10-24 14:23:03,603 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/float-benchs/Muller_Kahan.c [2020-10-24 14:23:03,685 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/318273b29/da70f062829c48f7a85b0415f4692d45/FLAG6cd363d6a [2020-10-24 14:23:04,246 INFO L306 CDTParser]: Found 1 translation units. [2020-10-24 14:23:04,247 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/releaseScripts/default/sv-benchmarks/c/float-benchs/Muller_Kahan.c [2020-10-24 14:23:04,255 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/318273b29/da70f062829c48f7a85b0415f4692d45/FLAG6cd363d6a [2020-10-24 14:23:04,610 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/318273b29/da70f062829c48f7a85b0415f4692d45 [2020-10-24 14:23:04,614 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-24 14:23:04,622 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-24 14:23:04,624 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-24 14:23:04,624 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-24 14:23:04,628 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-24 14:23:04,629 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 02:23:04" (1/1) ... [2020-10-24 14:23:04,634 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7a931647 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:23:04, skipping insertion in model container [2020-10-24 14:23:04,634 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 02:23:04" (1/1) ... [2020-10-24 14:23:04,649 INFO L146 MainTranslator]: Starting translation in SV-COMP mode [2020-10-24 14:23:04,674 INFO L179 MainTranslator]: Built tables and reachable declarations [2020-10-24 14:23:04,854 INFO L211 PostProcessor]: Analyzing one entry point: main [2020-10-24 14:23:04,873 INFO L212 MainTranslator]: Completed pre-run [2020-10-24 14:23:04,895 INFO L211 PostProcessor]: Analyzing one entry point: main [2020-10-24 14:23:04,922 INFO L217 MainTranslator]: Completed translation [2020-10-24 14:23:04,922 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:23:04 WrapperNode [2020-10-24 14:23:04,923 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-24 14:23:04,924 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-24 14:23:04,925 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-24 14:23:04,925 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-24 14:23:04,934 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:23:04" (1/1) ... [2020-10-24 14:23:04,945 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:23:04" (1/1) ... [2020-10-24 14:23:04,970 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-24 14:23:04,971 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-24 14:23:04,971 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-24 14:23:04,971 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-24 14:23:04,981 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:23:04" (1/1) ... [2020-10-24 14:23:04,982 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:23:04" (1/1) ... [2020-10-24 14:23:04,986 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:23:04" (1/1) ... [2020-10-24 14:23:04,987 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:23:04" (1/1) ... [2020-10-24 14:23:04,995 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:23:04" (1/1) ... [2020-10-24 14:23:05,001 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:23:04" (1/1) ... [2020-10-24 14:23:05,003 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:23:04" (1/1) ... [2020-10-24 14:23:05,007 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-24 14:23:05,009 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-24 14:23:05,009 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-24 14:23:05,009 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-24 14:23:05,010 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:23:04" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-24 14:23:05,093 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.float_to_bitvec_DOUBLE [2020-10-24 14:23:05,094 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2020-10-24 14:23:05,094 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-24 14:23:05,094 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-24 14:23:05,094 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-24 14:23:07,945 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-24 14:23:07,946 INFO L298 CfgBuilder]: Removed 9 assume(true) statements. [2020-10-24 14:23:07,948 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 02:23:07 BoogieIcfgContainer [2020-10-24 14:23:07,948 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-24 14:23:07,950 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-24 14:23:07,951 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-24 14:23:07,954 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-24 14:23:07,955 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 02:23:04" (1/3) ... [2020-10-24 14:23:07,956 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b1e00e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 02:23:07, skipping insertion in model container [2020-10-24 14:23:07,956 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:23:04" (2/3) ... [2020-10-24 14:23:07,957 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b1e00e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 02:23:07, skipping insertion in model container [2020-10-24 14:23:07,957 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 02:23:07" (3/3) ... [2020-10-24 14:23:07,959 INFO L111 eAbstractionObserver]: Analyzing ICFG Muller_Kahan.c [2020-10-24 14:23:07,971 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-24 14:23:07,977 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-24 14:23:07,991 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-24 14:23:08,021 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-24 14:23:08,021 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-24 14:23:08,022 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-24 14:23:08,022 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-24 14:23:08,022 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-24 14:23:08,022 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-24 14:23:08,023 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-24 14:23:08,023 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-24 14:23:08,038 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states. [2020-10-24 14:23:08,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-10-24 14:23:08,044 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 14:23:08,045 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 14:23:08,046 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 14:23:08,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 14:23:08,054 INFO L82 PathProgramCache]: Analyzing trace with hash 211951409, now seen corresponding path program 1 times [2020-10-24 14:23:08,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-24 14:23:08,074 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1025013928] [2020-10-24 14:23:08,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 2 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with mathsat -unsat_core_generation=3 [2020-10-24 14:23:09,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 14:23:09,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 2 conjunts are in the unsatisfiable core [2020-10-24 14:23:09,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-24 14:23:10,055 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 14:23:10,056 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-24 14:23:10,122 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 14:23:10,124 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1025013928] [2020-10-24 14:23:10,124 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-24 14:23:10,125 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2020-10-24 14:23:10,126 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504796646] [2020-10-24 14:23:10,131 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-24 14:23:10,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-10-24 14:23:10,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-24 14:23:10,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-24 14:23:10,147 INFO L87 Difference]: Start difference. First operand 15 states. Second operand 4 states. [2020-10-24 14:23:13,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 14:23:13,891 INFO L93 Difference]: Finished difference Result 26 states and 32 transitions. [2020-10-24 14:23:13,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-24 14:23:13,894 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2020-10-24 14:23:13,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 14:23:13,903 INFO L225 Difference]: With dead ends: 26 [2020-10-24 14:23:13,904 INFO L226 Difference]: Without dead ends: 11 [2020-10-24 14:23:13,907 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-24 14:23:13,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2020-10-24 14:23:13,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2020-10-24 14:23:13,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2020-10-24 14:23:13,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2020-10-24 14:23:13,945 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 8 [2020-10-24 14:23:13,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 14:23:13,945 INFO L481 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2020-10-24 14:23:13,945 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-24 14:23:13,946 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2020-10-24 14:23:13,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-24 14:23:13,946 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 14:23:13,947 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 14:23:14,162 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2020-10-24 14:23:14,162 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 14:23:14,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 14:23:14,165 INFO L82 PathProgramCache]: Analyzing trace with hash 1435849267, now seen corresponding path program 1 times [2020-10-24 14:23:14,166 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-24 14:23:14,167 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2101798089] [2020-10-24 14:23:14,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 3 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with mathsat -unsat_core_generation=3 [2020-10-24 14:23:17,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 14:23:17,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 3 conjunts are in the unsatisfiable core [2020-10-24 14:23:17,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-24 14:23:18,040 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 14:23:18,041 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-24 14:23:18,252 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 14:23:18,253 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2101798089] [2020-10-24 14:23:18,253 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-24 14:23:18,254 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2020-10-24 14:23:18,254 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913262576] [2020-10-24 14:23:18,256 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-24 14:23:18,256 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-10-24 14:23:18,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-24 14:23:18,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-24 14:23:18,258 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand 6 states. [2020-10-24 14:23:25,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 14:23:25,763 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2020-10-24 14:23:25,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-24 14:23:25,766 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-10-24 14:23:25,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 14:23:25,767 INFO L225 Difference]: With dead ends: 21 [2020-10-24 14:23:25,767 INFO L226 Difference]: Without dead ends: 15 [2020-10-24 14:23:25,768 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-24 14:23:25,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-10-24 14:23:25,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-10-24 14:23:25,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-10-24 14:23:25,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2020-10-24 14:23:25,778 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 10 [2020-10-24 14:23:25,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 14:23:25,779 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2020-10-24 14:23:25,779 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-24 14:23:25,780 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2020-10-24 14:23:25,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-24 14:23:25,780 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 14:23:25,782 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 14:23:25,982 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2020-10-24 14:23:25,984 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 14:23:25,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 14:23:25,986 INFO L82 PathProgramCache]: Analyzing trace with hash -1798984009, now seen corresponding path program 2 times [2020-10-24 14:23:25,988 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-24 14:23:25,988 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1782098503] [2020-10-24 14:23:25,988 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 4 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with mathsat -unsat_core_generation=3 [2020-10-24 14:23:33,473 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-24 14:23:33,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-24 14:23:34,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 30 conjunts are in the unsatisfiable core [2020-10-24 14:23:34,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-24 14:23:36,570 WARN L838 $PredicateComparison]: unable to prove that (and (= roundNearestTiesToEven c_~CRM) (exists ((|v_ULTIMATE.start_main_#t~nondet8_8| (_ BitVec 64)) (|v_ULTIMATE.start_main_#t~nondet7_8| (_ BitVec 64))) (let ((.cse1 (fp ((_ extract 63 63) |v_ULTIMATE.start_main_#t~nondet8_8|) ((_ extract 62 52) |v_ULTIMATE.start_main_#t~nondet8_8|) ((_ extract 51 0) |v_ULTIMATE.start_main_#t~nondet8_8|))) (.cse0 (fp ((_ extract 63 63) |v_ULTIMATE.start_main_#t~nondet7_8|) ((_ extract 62 52) |v_ULTIMATE.start_main_#t~nondet7_8|) ((_ extract 51 0) |v_ULTIMATE.start_main_#t~nondet7_8|)))) (and (= (fp.div c_~CRM .cse0 .cse1) (fp ((_ extract 63 63) c_ULTIMATE.start_main_~x0~0) ((_ extract 62 52) c_ULTIMATE.start_main_~x0~0) ((_ extract 51 0) c_ULTIMATE.start_main_~x0~0))) (= ((_ to_fp 11 53) c_~CRM 2.0) .cse1) (= ((_ to_fp 11 53) c_~CRM 11.0) .cse0)))) (exists ((|v_ULTIMATE.start_main_#t~nondet10_8| (_ BitVec 64)) (|v_ULTIMATE.start_main_#t~nondet11_8| (_ BitVec 64))) (let ((.cse2 (fp ((_ extract 63 63) |v_ULTIMATE.start_main_#t~nondet10_8|) ((_ extract 62 52) |v_ULTIMATE.start_main_#t~nondet10_8|) ((_ extract 51 0) |v_ULTIMATE.start_main_#t~nondet10_8|))) (.cse3 (fp ((_ extract 63 63) |v_ULTIMATE.start_main_#t~nondet11_8|) ((_ extract 62 52) |v_ULTIMATE.start_main_#t~nondet11_8|) ((_ extract 51 0) |v_ULTIMATE.start_main_#t~nondet11_8|)))) (and (= .cse2 ((_ to_fp 11 53) c_~CRM 61.0)) (= (fp.div c_~CRM .cse2 .cse3) (fp ((_ extract 63 63) c_ULTIMATE.start_main_~x1~0) ((_ extract 62 52) c_ULTIMATE.start_main_~x1~0) ((_ extract 51 0) c_ULTIMATE.start_main_~x1~0))) (= ((_ to_fp 11 53) c_~CRM 11.0) .cse3))))) is different from false [2020-10-24 14:23:41,225 WARN L838 $PredicateComparison]: unable to prove that (and (= roundNearestTiesToEven c_~CRM) (exists ((v_ULTIMATE.start_main_~x0~0_13 (_ BitVec 64)) (|v_ULTIMATE.start_main_#t~nondet16_8| (_ BitVec 64)) (|v_ULTIMATE.start_main_#t~nondet17_8| (_ BitVec 64)) (|v_ULTIMATE.start_main_#t~nondet18_8| (_ BitVec 64)) (|v_ULTIMATE.start_main_#t~nondet8_8| (_ BitVec 64)) (|v_ULTIMATE.start_main_#t~nondet19_8| (_ BitVec 64)) (|v_ULTIMATE.start_main_#t~nondet7_8| (_ BitVec 64)) (|v_ULTIMATE.start_main_#t~nondet14_8| (_ BitVec 64)) (|v_ULTIMATE.start_main_#t~nondet15_8| (_ BitVec 64))) (let ((.cse1 (fp ((_ extract 63 63) |v_ULTIMATE.start_main_#t~nondet16_8|) ((_ extract 62 52) |v_ULTIMATE.start_main_#t~nondet16_8|) ((_ extract 51 0) |v_ULTIMATE.start_main_#t~nondet16_8|))) (.cse5 (fp ((_ extract 63 63) |v_ULTIMATE.start_main_#t~nondet18_8|) ((_ extract 62 52) |v_ULTIMATE.start_main_#t~nondet18_8|) ((_ extract 51 0) |v_ULTIMATE.start_main_#t~nondet18_8|))) (.cse8 (fp ((_ extract 63 63) |v_ULTIMATE.start_main_#t~nondet15_8|) ((_ extract 62 52) |v_ULTIMATE.start_main_#t~nondet15_8|) ((_ extract 51 0) |v_ULTIMATE.start_main_#t~nondet15_8|))) (.cse0 (fp ((_ extract 63 63) |v_ULTIMATE.start_main_#t~nondet17_8|) ((_ extract 62 52) |v_ULTIMATE.start_main_#t~nondet17_8|) ((_ extract 51 0) |v_ULTIMATE.start_main_#t~nondet17_8|))) (.cse3 (fp ((_ extract 63 63) |v_ULTIMATE.start_main_#t~nondet14_8|) ((_ extract 62 52) |v_ULTIMATE.start_main_#t~nondet14_8|) ((_ extract 51 0) |v_ULTIMATE.start_main_#t~nondet14_8|))) (.cse4 (fp ((_ extract 63 63) |v_ULTIMATE.start_main_#t~nondet19_8|) ((_ extract 62 52) |v_ULTIMATE.start_main_#t~nondet19_8|) ((_ extract 51 0) |v_ULTIMATE.start_main_#t~nondet19_8|))) (.cse7 (fp ((_ extract 63 63) |v_ULTIMATE.start_main_#t~nondet7_8|) ((_ extract 62 52) |v_ULTIMATE.start_main_#t~nondet7_8|) ((_ extract 51 0) |v_ULTIMATE.start_main_#t~nondet7_8|))) (.cse6 (fp ((_ extract 63 63) |v_ULTIMATE.start_main_#t~nondet8_8|) ((_ extract 62 52) |v_ULTIMATE.start_main_#t~nondet8_8|) ((_ extract 51 0) |v_ULTIMATE.start_main_#t~nondet8_8|))) (.cse2 (fp ((_ extract 63 63) v_ULTIMATE.start_main_~x0~0_13) ((_ extract 62 52) v_ULTIMATE.start_main_~x0~0_13) ((_ extract 51 0) v_ULTIMATE.start_main_~x0~0_13)))) (and (= .cse0 (fp.div c_~CRM .cse1 .cse2)) (= ((_ to_fp 11 53) c_~CRM 111.0) .cse3) (= .cse4 (fp.div c_~CRM .cse5 (fp ((_ extract 63 63) c_ULTIMATE.start_main_~x0~0) ((_ extract 62 52) c_ULTIMATE.start_main_~x0~0) ((_ extract 51 0) c_ULTIMATE.start_main_~x0~0)))) (= ((_ to_fp 11 53) c_~CRM 3000.0) .cse1) (= ((_ to_fp 11 53) c_~CRM 2.0) .cse6) (= ((_ to_fp 11 53) c_~CRM 11.0) .cse7) (= ((_ to_fp 11 53) c_~CRM 1130.0) .cse8) (= .cse5 (fp.sub c_~CRM .cse8 .cse0)) (= (fp.sub c_~CRM .cse3 .cse4) (fp ((_ extract 63 63) c_ULTIMATE.start_main_~x1~0) ((_ extract 62 52) c_ULTIMATE.start_main_~x1~0) ((_ extract 51 0) c_ULTIMATE.start_main_~x1~0))) (= (fp.div c_~CRM .cse7 .cse6) .cse2)))) (exists ((|v_ULTIMATE.start_main_#t~nondet10_8| (_ BitVec 64)) (|v_ULTIMATE.start_main_#t~nondet11_8| (_ BitVec 64))) (let ((.cse9 (fp ((_ extract 63 63) |v_ULTIMATE.start_main_#t~nondet10_8|) ((_ extract 62 52) |v_ULTIMATE.start_main_#t~nondet10_8|) ((_ extract 51 0) |v_ULTIMATE.start_main_#t~nondet10_8|))) (.cse10 (fp ((_ extract 63 63) |v_ULTIMATE.start_main_#t~nondet11_8|) ((_ extract 62 52) |v_ULTIMATE.start_main_#t~nondet11_8|) ((_ extract 51 0) |v_ULTIMATE.start_main_#t~nondet11_8|)))) (and (= (fp.div c_~CRM .cse9 .cse10) (fp ((_ extract 63 63) c_ULTIMATE.start_main_~x0~0) ((_ extract 62 52) c_ULTIMATE.start_main_~x0~0) ((_ extract 51 0) c_ULTIMATE.start_main_~x0~0))) (= .cse9 ((_ to_fp 11 53) c_~CRM 61.0)) (= ((_ to_fp 11 53) c_~CRM 11.0) .cse10))))) is different from false [2020-10-24 14:23:50,185 WARN L838 $PredicateComparison]: unable to prove that (and (= roundNearestTiesToEven c_~CRM) (exists ((|v_ULTIMATE.start_main_#t~nondet19_9| (_ BitVec 64)) (|v_ULTIMATE.start_main_#t~nondet8_8| (_ BitVec 64)) (v_ULTIMATE.start_main_~x1~0_12 (_ BitVec 64)) (|v_ULTIMATE.start_main_#t~nondet7_8| (_ BitVec 64)) (|v_ULTIMATE.start_main_#t~nondet10_8| (_ BitVec 64)) (|v_ULTIMATE.start_main_#t~nondet11_8| (_ BitVec 64)) (v_ULTIMATE.start_main_~x0~0_13 (_ BitVec 64)) (v_ULTIMATE.start_main_~x0~0_14 (_ BitVec 64)) (|v_ULTIMATE.start_main_#t~nondet16_8| (_ BitVec 64)) (|v_ULTIMATE.start_main_#t~nondet15_9| (_ BitVec 64)) (|v_ULTIMATE.start_main_#t~nondet17_8| (_ BitVec 64)) (|v_ULTIMATE.start_main_#t~nondet16_9| (_ BitVec 64)) (|v_ULTIMATE.start_main_#t~nondet18_8| (_ BitVec 64)) (|v_ULTIMATE.start_main_#t~nondet17_9| (_ BitVec 64)) (|v_ULTIMATE.start_main_#t~nondet19_8| (_ BitVec 64)) (|v_ULTIMATE.start_main_#t~nondet18_9| (_ BitVec 64)) (|v_ULTIMATE.start_main_#t~nondet14_8| (_ BitVec 64)) (|v_ULTIMATE.start_main_#t~nondet14_9| (_ BitVec 64)) (|v_ULTIMATE.start_main_#t~nondet15_8| (_ BitVec 64))) (let ((.cse4 (fp ((_ extract 63 63) |v_ULTIMATE.start_main_#t~nondet19_8|) ((_ extract 62 52) |v_ULTIMATE.start_main_#t~nondet19_8|) ((_ extract 51 0) |v_ULTIMATE.start_main_#t~nondet19_8|))) (.cse7 ((_ to_fp 11 53) c_~CRM 3000.0)) (.cse1 (fp ((_ extract 63 63) |v_ULTIMATE.start_main_#t~nondet16_8|) ((_ extract 62 52) |v_ULTIMATE.start_main_#t~nondet16_8|) ((_ extract 51 0) |v_ULTIMATE.start_main_#t~nondet16_8|))) (.cse5 (fp ((_ extract 63 63) v_ULTIMATE.start_main_~x1~0_12) ((_ extract 62 52) v_ULTIMATE.start_main_~x1~0_12) ((_ extract 51 0) v_ULTIMATE.start_main_~x1~0_12))) (.cse9 (fp ((_ extract 63 63) |v_ULTIMATE.start_main_#t~nondet18_8|) ((_ extract 62 52) |v_ULTIMATE.start_main_#t~nondet18_8|) ((_ extract 51 0) |v_ULTIMATE.start_main_#t~nondet18_8|))) (.cse0 (fp ((_ extract 63 63) |v_ULTIMATE.start_main_#t~nondet17_8|) ((_ extract 62 52) |v_ULTIMATE.start_main_#t~nondet17_8|) ((_ extract 51 0) |v_ULTIMATE.start_main_#t~nondet17_8|))) (.cse14 (fp ((_ extract 63 63) |v_ULTIMATE.start_main_#t~nondet7_8|) ((_ extract 62 52) |v_ULTIMATE.start_main_#t~nondet7_8|) ((_ extract 51 0) |v_ULTIMATE.start_main_#t~nondet7_8|))) (.cse2 (fp ((_ extract 63 63) v_ULTIMATE.start_main_~x0~0_13) ((_ extract 62 52) v_ULTIMATE.start_main_~x0~0_13) ((_ extract 51 0) v_ULTIMATE.start_main_~x0~0_13))) (.cse11 ((_ to_fp 11 53) c_~CRM 111.0)) (.cse3 (fp ((_ extract 63 63) |v_ULTIMATE.start_main_#t~nondet14_8|) ((_ extract 62 52) |v_ULTIMATE.start_main_#t~nondet14_8|) ((_ extract 51 0) |v_ULTIMATE.start_main_#t~nondet14_8|))) (.cse6 (fp ((_ extract 63 63) |v_ULTIMATE.start_main_#t~nondet10_8|) ((_ extract 62 52) |v_ULTIMATE.start_main_#t~nondet10_8|) ((_ extract 51 0) |v_ULTIMATE.start_main_#t~nondet10_8|))) (.cse18 (fp ((_ extract 63 63) |v_ULTIMATE.start_main_#t~nondet8_8|) ((_ extract 62 52) |v_ULTIMATE.start_main_#t~nondet8_8|) ((_ extract 51 0) |v_ULTIMATE.start_main_#t~nondet8_8|))) (.cse8 (fp ((_ extract 63 63) |v_ULTIMATE.start_main_#t~nondet16_9|) ((_ extract 62 52) |v_ULTIMATE.start_main_#t~nondet16_9|) ((_ extract 51 0) |v_ULTIMATE.start_main_#t~nondet16_9|))) (.cse10 (fp ((_ extract 63 63) v_ULTIMATE.start_main_~x0~0_14) ((_ extract 62 52) v_ULTIMATE.start_main_~x0~0_14) ((_ extract 51 0) v_ULTIMATE.start_main_~x0~0_14))) (.cse13 ((_ to_fp 11 53) c_~CRM 11.0)) (.cse21 (fp ((_ extract 63 63) |v_ULTIMATE.start_main_#t~nondet11_8|) ((_ extract 62 52) |v_ULTIMATE.start_main_#t~nondet11_8|) ((_ extract 51 0) |v_ULTIMATE.start_main_#t~nondet11_8|))) (.cse19 ((_ to_fp 11 53) c_~CRM 1130.0)) (.cse17 (fp ((_ extract 63 63) |v_ULTIMATE.start_main_#t~nondet15_8|) ((_ extract 62 52) |v_ULTIMATE.start_main_#t~nondet15_8|) ((_ extract 51 0) |v_ULTIMATE.start_main_#t~nondet15_8|))) (.cse12 (fp ((_ extract 63 63) |v_ULTIMATE.start_main_#t~nondet14_9|) ((_ extract 62 52) |v_ULTIMATE.start_main_#t~nondet14_9|) ((_ extract 51 0) |v_ULTIMATE.start_main_#t~nondet14_9|))) (.cse16 (fp ((_ extract 63 63) |v_ULTIMATE.start_main_#t~nondet19_9|) ((_ extract 62 52) |v_ULTIMATE.start_main_#t~nondet19_9|) ((_ extract 51 0) |v_ULTIMATE.start_main_#t~nondet19_9|))) (.cse20 (fp ((_ extract 63 63) |v_ULTIMATE.start_main_#t~nondet15_9|) ((_ extract 62 52) |v_ULTIMATE.start_main_#t~nondet15_9|) ((_ extract 51 0) |v_ULTIMATE.start_main_#t~nondet15_9|))) (.cse22 (fp ((_ extract 63 63) |v_ULTIMATE.start_main_#t~nondet17_9|) ((_ extract 62 52) |v_ULTIMATE.start_main_#t~nondet17_9|) ((_ extract 51 0) |v_ULTIMATE.start_main_#t~nondet17_9|))) (.cse15 (fp ((_ extract 63 63) |v_ULTIMATE.start_main_#t~nondet18_9|) ((_ extract 62 52) |v_ULTIMATE.start_main_#t~nondet18_9|) ((_ extract 51 0) |v_ULTIMATE.start_main_#t~nondet18_9|)))) (and (= .cse0 (fp.div c_~CRM .cse1 .cse2)) (= (fp.sub c_~CRM .cse3 .cse4) .cse5) (= .cse6 ((_ to_fp 11 53) c_~CRM 61.0)) (= .cse7 .cse8) (= .cse4 (fp.div c_~CRM .cse9 .cse10)) (= .cse7 .cse1) (= .cse11 .cse12) (= .cse13 .cse14) (= (fp.div c_~CRM .cse15 .cse5) .cse16) (= .cse9 (fp.sub c_~CRM .cse17 .cse0)) (= (fp.div c_~CRM .cse14 .cse18) .cse2) (= .cse11 .cse3) (= .cse19 .cse20) (= (fp.div c_~CRM .cse6 .cse21) .cse10) (= ((_ to_fp 11 53) c_~CRM 2.0) .cse18) (= (fp.div c_~CRM .cse8 .cse10) .cse22) (= .cse13 .cse21) (= .cse19 .cse17) (= (fp.sub c_~CRM .cse12 .cse16) (fp ((_ extract 63 63) c_ULTIMATE.start_main_~x1~0) ((_ extract 62 52) c_ULTIMATE.start_main_~x1~0) ((_ extract 51 0) c_ULTIMATE.start_main_~x1~0))) (= (fp.sub c_~CRM .cse20 .cse22) .cse15))))) is different from false [2020-10-24 14:23:56,224 WARN L195 Executor]: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000) stderr output: (error "out of memory") [2020-10-24 14:23:56,227 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1782098503] [2020-10-24 14:23:56,228 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000)Received EOF on stdin. stderr output: (error "out of memory") [2020-10-24 14:23:56,228 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [655372918] [2020-10-24 14:23:56,228 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/cvc4 Starting monitored process 5 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2020-10-24 14:24:10,766 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-24 14:24:10,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-24 14:24:10,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 5 conjunts are in the unsatisfiable core [2020-10-24 14:24:10,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-24 14:24:10,787 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.MonolithicImplicationChecker@594c7602 [2020-10-24 14:24:10,788 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1593876583] [2020-10-24 14:24:10,788 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-24 14:24:30,271 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-24 14:24:30,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-24 14:24:30,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-24 14:24:30,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-24 14:24:30,612 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.MonolithicImplicationChecker@594c7602 [2020-10-24 14:24:30,612 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2020-10-24 14:24:30,613 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2020-10-24 14:24:30,613 ERROR L205 FreeRefinementEngine]: Strategy WOLF failed to provide any proof altough trace is infeasible [2020-10-24 14:24:30,613 INFO L523 BasicCegarLoop]: Counterexample might be feasible [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forcibly destroying the process [2020-10-24 14:24:31,230 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 mathsat -unsat_core_generation=3,5 cvc4 --incremental --print-success --lang smt --rewrite-divk,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-24 14:24:31,285 WARN L238 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2020-10-24 14:24:31,288 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.10 02:24:31 BoogieIcfgContainer [2020-10-24 14:24:31,288 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-24 14:24:31,289 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-24 14:24:31,290 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-24 14:24:31,291 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-24 14:24:31,291 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 02:23:07" (3/4) ... [2020-10-24 14:24:31,296 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-10-24 14:24:31,297 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-24 14:24:31,300 INFO L168 Benchmark]: Toolchain (without parser) took 86681.91 ms. Allocated memory was 35.7 MB in the beginning and 125.8 MB in the end (delta: 90.2 MB). Free memory was 19.7 MB in the beginning and 101.1 MB in the end (delta: -81.4 MB). Peak memory consumption was 8.1 MB. Max. memory is 16.1 GB. [2020-10-24 14:24:31,302 INFO L168 Benchmark]: CDTParser took 0.33 ms. Allocated memory is still 35.7 MB. Free memory was 20.6 MB in the beginning and 20.6 MB in the end (delta: 26.3 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-10-24 14:24:31,306 INFO L168 Benchmark]: CACSL2BoogieTranslator took 299.67 ms. Allocated memory was 35.7 MB in the beginning and 48.2 MB in the end (delta: 12.6 MB). Free memory was 19.0 MB in the beginning and 29.1 MB in the end (delta: -10.1 MB). Peak memory consumption was 6.8 MB. Max. memory is 16.1 GB. [2020-10-24 14:24:31,307 INFO L168 Benchmark]: Boogie Procedure Inliner took 45.88 ms. Allocated memory is still 48.2 MB. Free memory was 29.1 MB in the beginning and 27.5 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-10-24 14:24:31,308 INFO L168 Benchmark]: Boogie Preprocessor took 36.82 ms. Allocated memory is still 48.2 MB. Free memory was 27.5 MB in the beginning and 26.1 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-10-24 14:24:31,316 INFO L168 Benchmark]: RCFGBuilder took 2939.72 ms. Allocated memory is still 48.2 MB. Free memory was 26.1 MB in the beginning and 23.5 MB in the end (delta: 2.6 MB). Peak memory consumption was 9.7 MB. Max. memory is 16.1 GB. [2020-10-24 14:24:31,318 INFO L168 Benchmark]: TraceAbstraction took 83338.27 ms. Allocated memory was 48.2 MB in the beginning and 125.8 MB in the end (delta: 77.6 MB). Free memory was 23.0 MB in the beginning and 102.2 MB in the end (delta: -79.2 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-10-24 14:24:31,320 INFO L168 Benchmark]: Witness Printer took 7.46 ms. Allocated memory is still 125.8 MB. Free memory was 102.2 MB in the beginning and 101.1 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-10-24 14:24:31,330 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.33 ms. Allocated memory is still 35.7 MB. Free memory was 20.6 MB in the beginning and 20.6 MB in the end (delta: 26.3 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 299.67 ms. Allocated memory was 35.7 MB in the beginning and 48.2 MB in the end (delta: 12.6 MB). Free memory was 19.0 MB in the beginning and 29.1 MB in the end (delta: -10.1 MB). Peak memory consumption was 6.8 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 45.88 ms. Allocated memory is still 48.2 MB. Free memory was 29.1 MB in the beginning and 27.5 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 36.82 ms. Allocated memory is still 48.2 MB. Free memory was 27.5 MB in the beginning and 26.1 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 2939.72 ms. Allocated memory is still 48.2 MB. Free memory was 26.1 MB in the beginning and 23.5 MB in the end (delta: 2.6 MB). Peak memory consumption was 9.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 83338.27 ms. Allocated memory was 48.2 MB in the beginning and 125.8 MB in the end (delta: 77.6 MB). Free memory was 23.0 MB in the beginning and 102.2 MB in the end (delta: -79.2 MB). There was no memory consumed. Max. memory is 16.1 GB. * Witness Printer took 7.46 ms. Allocated memory is still 125.8 MB. Free memory was 102.2 MB in the beginning and 101.1 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 3]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L16] double x0, x1, x2; [L17] int i; [L19] EXPR 11. [L19] EXPR 2. [L19] EXPR 11. / 2. [L19] x0 = 11. / 2. [L20] EXPR 61. [L20] EXPR 11. [L20] EXPR 61. / 11. [L20] x1 = 61. / 11. [L21] i = 0 [L21] COND TRUE i < 100 [L22] EXPR 111. [L22] EXPR 1130. [L22] EXPR 3000. [L22] EXPR 3000. / x0 [L22] EXPR 1130. - 3000. / x0 [L22] EXPR (1130. - 3000. / x0) / x1 [L22] EXPR 111. - (1130. - 3000. / x0) / x1 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] EXPR 111. [L22] EXPR 1130. [L22] EXPR 3000. [L22] EXPR 3000. / x0 [L22] EXPR 1130. - 3000. / x0 [L22] EXPR (1130. - 3000. / x0) / x1 [L22] EXPR 111. - (1130. - 3000. / x0) / x1 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] EXPR 111. [L22] EXPR 1130. [L22] EXPR 3000. [L22] EXPR 3000. / x0 [L22] EXPR 1130. - 3000. / x0 [L22] EXPR (1130. - 3000. / x0) / x1 [L22] EXPR 111. - (1130. - 3000. / x0) / x1 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND FALSE !(i < 100) [L27] EXPR 99. [L27] x0 >= 99. && x0 <= 101. [L27] EXPR 101. [L27] x0 >= 99. && x0 <= 101. [L12] COND TRUE !(cond) [L3] __assert_fail("0", "Muller_Kahan.c", 3, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 15 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNKNOWN, OverallTime: 83.2s, OverallIterations: 3, TraceHistogramMax: 3, AutomataDifference: 11.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 23 SDtfs, 0 SDslu, 36 SDs, 0 SdLazy, 11 SolverSat, 2 SolverUnsat, 3 SolverUnknown, 0 SolverNotchecked, 10.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 32 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=15occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 2 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 5.0s SatisfiabilityAnalysisTime, 0.9s InterpolantComputationTime, 18 NumberOfCodeBlocks, 18 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 32 ConstructedInterpolants, 0 QuantifiedInterpolants, 432 SizeOfPredicates, 2 NumberOfNonLiveVariables, 89 ConjunctsInSsa, 5 ConjunctsInUnsatCore, 4 InterpolantComputations, 2 PerfectInterpolantSequences, 0/2 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 could not prove your program: unable to determine feasibility of some traces Received shutdown request...