./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/pthread/triangular-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 96f16385 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/pthread/triangular-2.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 39211c46f4aae13996ba33c19e2c7157964c8aaa ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.0-96f1638 [2020-12-02 11:43:07,552 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-02 11:43:07,556 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-02 11:43:07,614 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-02 11:43:07,614 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-02 11:43:07,616 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-02 11:43:07,618 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-02 11:43:07,620 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-02 11:43:07,623 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-02 11:43:07,624 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-02 11:43:07,625 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-02 11:43:07,627 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-02 11:43:07,627 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-02 11:43:07,629 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-02 11:43:07,630 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-02 11:43:07,632 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-02 11:43:07,633 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-02 11:43:07,634 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-02 11:43:07,636 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-02 11:43:07,639 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-02 11:43:07,641 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-02 11:43:07,644 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-02 11:43:07,645 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-02 11:43:07,647 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-02 11:43:07,650 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-02 11:43:07,651 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-02 11:43:07,651 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-02 11:43:07,652 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-02 11:43:07,653 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-02 11:43:07,654 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-02 11:43:07,655 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-02 11:43:07,656 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-02 11:43:07,657 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-02 11:43:07,659 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-02 11:43:07,661 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-02 11:43:07,661 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-02 11:43:07,662 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-02 11:43:07,663 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-02 11:43:07,663 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-02 11:43:07,664 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-02 11:43:07,665 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-02 11:43:07,667 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-12-02 11:43:07,697 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-02 11:43:07,698 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-02 11:43:07,699 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-02 11:43:07,700 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-02 11:43:07,700 INFO L138 SettingsManager]: * Use SBE=true [2020-12-02 11:43:07,701 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-02 11:43:07,701 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-02 11:43:07,701 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-02 11:43:07,701 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-02 11:43:07,702 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-02 11:43:07,702 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-02 11:43:07,702 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-02 11:43:07,703 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-02 11:43:07,703 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-02 11:43:07,703 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-02 11:43:07,703 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-02 11:43:07,704 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-02 11:43:07,704 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-02 11:43:07,704 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-02 11:43:07,705 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-12-02 11:43:07,705 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-02 11:43:07,705 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-02 11:43:07,705 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-02 11:43:07,706 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-02 11:43:07,706 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-02 11:43:07,706 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-02 11:43:07,707 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-02 11:43:07,707 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-02 11:43:07,707 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-02 11:43:07,707 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 39211c46f4aae13996ba33c19e2c7157964c8aaa [2020-12-02 11:43:08,099 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-02 11:43:08,138 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-02 11:43:08,141 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-02 11:43:08,143 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-02 11:43:08,145 INFO L275 PluginConnector]: CDTParser initialized [2020-12-02 11:43:08,146 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread/triangular-2.i [2020-12-02 11:43:08,226 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/66e800068/231bafd8ebda4131bf292dcb7d3da675/FLAGeb27dea7a [2020-12-02 11:43:09,005 INFO L306 CDTParser]: Found 1 translation units. [2020-12-02 11:43:09,006 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread/triangular-2.i [2020-12-02 11:43:09,023 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/66e800068/231bafd8ebda4131bf292dcb7d3da675/FLAGeb27dea7a [2020-12-02 11:43:09,245 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/66e800068/231bafd8ebda4131bf292dcb7d3da675 [2020-12-02 11:43:09,250 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-02 11:43:09,252 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-02 11:43:09,259 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-02 11:43:09,259 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-02 11:43:09,266 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-02 11:43:09,267 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 11:43:09" (1/1) ... [2020-12-02 11:43:09,271 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@53d9fd58 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 11:43:09, skipping insertion in model container [2020-12-02 11:43:09,272 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 11:43:09" (1/1) ... [2020-12-02 11:43:09,280 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-02 11:43:09,336 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-02 11:43:09,673 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread/triangular-2.i[30952,30965] [2020-12-02 11:43:09,678 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-02 11:43:09,689 INFO L203 MainTranslator]: Completed pre-run [2020-12-02 11:43:09,759 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread/triangular-2.i[30952,30965] [2020-12-02 11:43:09,761 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-02 11:43:09,884 INFO L208 MainTranslator]: Completed translation [2020-12-02 11:43:09,884 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 11:43:09 WrapperNode [2020-12-02 11:43:09,885 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-02 11:43:09,888 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-02 11:43:09,888 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-02 11:43:09,888 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-02 11:43:09,898 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 11:43:09" (1/1) ... [2020-12-02 11:43:09,940 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 11:43:09" (1/1) ... [2020-12-02 11:43:09,971 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-02 11:43:09,973 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-02 11:43:09,974 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-02 11:43:09,974 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-02 11:43:09,984 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 11:43:09" (1/1) ... [2020-12-02 11:43:09,984 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 11:43:09" (1/1) ... [2020-12-02 11:43:09,992 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 11:43:09" (1/1) ... [2020-12-02 11:43:09,993 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 11:43:09" (1/1) ... [2020-12-02 11:43:10,009 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 11:43:09" (1/1) ... [2020-12-02 11:43:10,014 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 11:43:09" (1/1) ... [2020-12-02 11:43:10,017 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 11:43:09" (1/1) ... [2020-12-02 11:43:10,020 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-02 11:43:10,022 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-02 11:43:10,022 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-02 11:43:10,022 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-02 11:43:10,023 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 11:43:09" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-02 11:43:10,135 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2020-12-02 11:43:10,136 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2020-12-02 11:43:10,136 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2020-12-02 11:43:10,136 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2020-12-02 11:43:10,137 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-02 11:43:10,137 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-12-02 11:43:10,137 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-02 11:43:10,138 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-02 11:43:10,138 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-02 11:43:10,138 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-12-02 11:43:10,139 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-02 11:43:10,139 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-02 11:43:10,141 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-12-02 11:43:10,587 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-02 11:43:10,587 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-12-02 11:43:10,590 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 11:43:10 BoogieIcfgContainer [2020-12-02 11:43:10,591 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-02 11:43:10,593 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-02 11:43:10,593 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-02 11:43:10,597 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-02 11:43:10,598 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 11:43:09" (1/3) ... [2020-12-02 11:43:10,599 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35f0faaa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 11:43:10, skipping insertion in model container [2020-12-02 11:43:10,599 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 11:43:09" (2/3) ... [2020-12-02 11:43:10,600 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35f0faaa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 11:43:10, skipping insertion in model container [2020-12-02 11:43:10,600 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 11:43:10" (3/3) ... [2020-12-02 11:43:10,602 INFO L111 eAbstractionObserver]: Analyzing ICFG triangular-2.i [2020-12-02 11:43:10,622 WARN L169 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-12-02 11:43:10,622 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-02 11:43:10,627 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-02 11:43:10,628 INFO L354 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-12-02 11:43:10,660 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-02 11:43:10,660 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-02 11:43:10,661 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-02 11:43:10,661 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-02 11:43:10,661 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-02 11:43:10,661 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-02 11:43:10,662 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-02 11:43:10,662 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-02 11:43:10,662 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-02 11:43:10,663 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-02 11:43:10,663 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-02 11:43:10,663 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-02 11:43:10,664 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-02 11:43:10,664 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-02 11:43:10,664 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-02 11:43:10,665 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-02 11:43:10,665 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-02 11:43:10,665 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-02 11:43:10,666 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-02 11:43:10,666 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-02 11:43:10,666 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-02 11:43:10,667 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-02 11:43:10,667 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-02 11:43:10,667 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-02 11:43:10,668 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-02 11:43:10,668 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-02 11:43:10,668 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-02 11:43:10,668 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-02 11:43:10,669 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-02 11:43:10,669 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-02 11:43:10,670 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-02 11:43:10,670 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-02 11:43:10,670 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-02 11:43:10,670 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-02 11:43:10,671 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-02 11:43:10,671 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-02 11:43:10,671 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-02 11:43:10,672 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-02 11:43:10,672 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-02 11:43:10,672 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-02 11:43:10,673 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-02 11:43:10,673 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-02 11:43:10,673 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-02 11:43:10,673 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-02 11:43:10,674 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-02 11:43:10,674 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-02 11:43:10,674 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-02 11:43:10,679 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-02 11:43:10,680 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-02 11:43:10,680 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-02 11:43:10,681 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-02 11:43:10,681 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-02 11:43:10,681 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-02 11:43:10,681 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-02 11:43:10,682 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-02 11:43:10,682 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-02 11:43:10,685 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-02 11:43:10,686 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-02 11:43:10,686 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-02 11:43:10,686 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-02 11:43:10,686 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-02 11:43:10,687 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-02 11:43:10,692 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-02 11:43:10,693 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-02 11:43:10,693 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-02 11:43:10,693 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-02 11:43:10,694 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-02 11:43:10,694 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-02 11:43:10,696 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2020-12-02 11:43:10,711 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-12-02 11:43:10,738 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-02 11:43:10,738 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-02 11:43:10,738 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-02 11:43:10,739 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-02 11:43:10,739 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-02 11:43:10,739 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-02 11:43:10,739 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-02 11:43:10,740 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-02 11:43:10,754 INFO L120 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2020-12-02 11:43:10,757 INFO L135 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 62 places, 60 transitions, 130 flow [2020-12-02 11:43:10,760 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 62 places, 60 transitions, 130 flow [2020-12-02 11:43:10,763 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 62 places, 60 transitions, 130 flow [2020-12-02 11:43:10,808 INFO L129 PetriNetUnfolder]: 5/58 cut-off events. [2020-12-02 11:43:10,809 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-12-02 11:43:10,817 INFO L84 FinitePrefix]: Finished finitePrefix Result has 65 conditions, 58 events. 5/58 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 78 event pairs, 0 based on Foata normal form. 0/52 useless extension candidates. Maximal degree in co-relation 42. Up to 2 conditions per place. [2020-12-02 11:43:10,823 INFO L116 LiptonReduction]: Number of co-enabled transitions 968 [2020-12-02 11:43:13,338 WARN L197 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 89 [2020-12-02 11:43:13,473 WARN L197 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2020-12-02 11:43:13,747 WARN L197 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 89 [2020-12-02 11:43:13,874 WARN L197 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2020-12-02 11:43:13,900 INFO L131 LiptonReduction]: Checked pairs total: 998 [2020-12-02 11:43:13,901 INFO L133 LiptonReduction]: Total number of compositions: 52 [2020-12-02 11:43:13,909 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 16 transitions, 42 flow [2020-12-02 11:43:13,925 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 44 states. [2020-12-02 11:43:13,927 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-12-02 11:43:13,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-02 11:43:13,934 INFO L414 BasicCegarLoop]: Found error trace [2020-12-02 11:43:13,935 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-02 11:43:13,935 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-02 11:43:13,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-02 11:43:13,942 INFO L82 PathProgramCache]: Analyzing trace with hash -1332860337, now seen corresponding path program 1 times [2020-12-02 11:43:13,952 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-02 11:43:13,953 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130923499] [2020-12-02 11:43:13,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-02 11:43:14,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-02 11:43:14,244 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 11:43:14,246 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130923499] [2020-12-02 11:43:14,248 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-02 11:43:14,249 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-02 11:43:14,250 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542867295] [2020-12-02 11:43:14,256 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-02 11:43:14,257 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-02 11:43:14,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-02 11:43:14,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-02 11:43:14,281 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 4 states. [2020-12-02 11:43:14,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-02 11:43:14,355 INFO L93 Difference]: Finished difference Result 83 states and 212 transitions. [2020-12-02 11:43:14,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-02 11:43:14,357 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-12-02 11:43:14,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-02 11:43:14,370 INFO L225 Difference]: With dead ends: 83 [2020-12-02 11:43:14,370 INFO L226 Difference]: Without dead ends: 54 [2020-12-02 11:43:14,372 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-02 11:43:14,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-12-02 11:43:14,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 50. [2020-12-02 11:43:14,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-12-02 11:43:14,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 120 transitions. [2020-12-02 11:43:14,414 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 120 transitions. Word has length 6 [2020-12-02 11:43:14,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-02 11:43:14,415 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 120 transitions. [2020-12-02 11:43:14,415 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-02 11:43:14,415 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 120 transitions. [2020-12-02 11:43:14,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-02 11:43:14,416 INFO L414 BasicCegarLoop]: Found error trace [2020-12-02 11:43:14,416 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-02 11:43:14,416 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-02 11:43:14,417 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-02 11:43:14,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-02 11:43:14,417 INFO L82 PathProgramCache]: Analyzing trace with hash -978539367, now seen corresponding path program 1 times [2020-12-02 11:43:14,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-02 11:43:14,418 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145614263] [2020-12-02 11:43:14,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-02 11:43:14,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-02 11:43:14,517 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 11:43:14,518 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145614263] [2020-12-02 11:43:14,518 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-02 11:43:14,518 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-02 11:43:14,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200045688] [2020-12-02 11:43:14,520 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-02 11:43:14,520 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-02 11:43:14,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-02 11:43:14,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-02 11:43:14,522 INFO L87 Difference]: Start difference. First operand 50 states and 120 transitions. Second operand 5 states. [2020-12-02 11:43:14,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-02 11:43:14,561 INFO L93 Difference]: Finished difference Result 86 states and 200 transitions. [2020-12-02 11:43:14,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-02 11:43:14,562 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-12-02 11:43:14,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-02 11:43:14,564 INFO L225 Difference]: With dead ends: 86 [2020-12-02 11:43:14,564 INFO L226 Difference]: Without dead ends: 78 [2020-12-02 11:43:14,565 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-12-02 11:43:14,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-12-02 11:43:14,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 56. [2020-12-02 11:43:14,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-12-02 11:43:14,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 137 transitions. [2020-12-02 11:43:14,577 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 137 transitions. Word has length 8 [2020-12-02 11:43:14,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-02 11:43:14,577 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 137 transitions. [2020-12-02 11:43:14,577 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-02 11:43:14,578 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 137 transitions. [2020-12-02 11:43:14,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-02 11:43:14,578 INFO L414 BasicCegarLoop]: Found error trace [2020-12-02 11:43:14,579 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-02 11:43:14,579 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-02 11:43:14,579 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-02 11:43:14,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-02 11:43:14,580 INFO L82 PathProgramCache]: Analyzing trace with hash -978459387, now seen corresponding path program 2 times [2020-12-02 11:43:14,580 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-02 11:43:14,580 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127647002] [2020-12-02 11:43:14,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-02 11:43:14,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-02 11:43:14,677 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 11:43:14,679 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127647002] [2020-12-02 11:43:14,679 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-02 11:43:14,679 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-02 11:43:14,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742214253] [2020-12-02 11:43:14,680 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-02 11:43:14,680 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-02 11:43:14,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-02 11:43:14,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-02 11:43:14,681 INFO L87 Difference]: Start difference. First operand 56 states and 137 transitions. Second operand 5 states. [2020-12-02 11:43:14,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-02 11:43:14,740 INFO L93 Difference]: Finished difference Result 62 states and 143 transitions. [2020-12-02 11:43:14,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-02 11:43:14,741 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-12-02 11:43:14,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-02 11:43:14,743 INFO L225 Difference]: With dead ends: 62 [2020-12-02 11:43:14,744 INFO L226 Difference]: Without dead ends: 50 [2020-12-02 11:43:14,744 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-02 11:43:14,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-12-02 11:43:14,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 42. [2020-12-02 11:43:14,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-12-02 11:43:14,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 98 transitions. [2020-12-02 11:43:14,761 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 98 transitions. Word has length 8 [2020-12-02 11:43:14,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-02 11:43:14,763 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 98 transitions. [2020-12-02 11:43:14,764 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-02 11:43:14,764 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 98 transitions. [2020-12-02 11:43:14,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-02 11:43:14,766 INFO L414 BasicCegarLoop]: Found error trace [2020-12-02 11:43:14,766 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-02 11:43:14,767 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-02 11:43:14,767 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-02 11:43:14,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-02 11:43:14,769 INFO L82 PathProgramCache]: Analyzing trace with hash -978842826, now seen corresponding path program 1 times [2020-12-02 11:43:14,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-02 11:43:14,770 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741618910] [2020-12-02 11:43:14,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-02 11:43:14,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-02 11:43:14,892 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 11:43:14,893 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741618910] [2020-12-02 11:43:14,895 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-02 11:43:14,896 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-02 11:43:14,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017781899] [2020-12-02 11:43:14,897 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-02 11:43:14,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-02 11:43:14,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-02 11:43:14,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-02 11:43:14,903 INFO L87 Difference]: Start difference. First operand 42 states and 98 transitions. Second operand 5 states. [2020-12-02 11:43:14,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-02 11:43:14,955 INFO L93 Difference]: Finished difference Result 56 states and 130 transitions. [2020-12-02 11:43:14,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-02 11:43:14,956 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-12-02 11:43:14,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-02 11:43:14,957 INFO L225 Difference]: With dead ends: 56 [2020-12-02 11:43:14,957 INFO L226 Difference]: Without dead ends: 50 [2020-12-02 11:43:14,958 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-02 11:43:14,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-12-02 11:43:14,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 42. [2020-12-02 11:43:14,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-12-02 11:43:14,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 100 transitions. [2020-12-02 11:43:14,964 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 100 transitions. Word has length 8 [2020-12-02 11:43:14,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-02 11:43:14,965 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 100 transitions. [2020-12-02 11:43:14,965 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-02 11:43:14,965 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 100 transitions. [2020-12-02 11:43:14,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-02 11:43:14,966 INFO L414 BasicCegarLoop]: Found error trace [2020-12-02 11:43:14,966 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-02 11:43:14,967 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-02 11:43:14,967 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-02 11:43:14,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-02 11:43:14,968 INFO L82 PathProgramCache]: Analyzing trace with hash 220478720, now seen corresponding path program 1 times [2020-12-02 11:43:14,968 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-02 11:43:14,968 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056000989] [2020-12-02 11:43:14,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-02 11:43:14,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-02 11:43:15,037 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 11:43:15,038 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056000989] [2020-12-02 11:43:15,038 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-02 11:43:15,038 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-02 11:43:15,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280900610] [2020-12-02 11:43:15,039 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-02 11:43:15,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-02 11:43:15,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-02 11:43:15,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-02 11:43:15,040 INFO L87 Difference]: Start difference. First operand 42 states and 100 transitions. Second operand 6 states. [2020-12-02 11:43:15,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-02 11:43:15,114 INFO L93 Difference]: Finished difference Result 58 states and 132 transitions. [2020-12-02 11:43:15,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-02 11:43:15,115 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-12-02 11:43:15,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-02 11:43:15,117 INFO L225 Difference]: With dead ends: 58 [2020-12-02 11:43:15,118 INFO L226 Difference]: Without dead ends: 51 [2020-12-02 11:43:15,119 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-12-02 11:43:15,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-12-02 11:43:15,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 45. [2020-12-02 11:43:15,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-12-02 11:43:15,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 107 transitions. [2020-12-02 11:43:15,137 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 107 transitions. Word has length 10 [2020-12-02 11:43:15,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-02 11:43:15,137 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 107 transitions. [2020-12-02 11:43:15,137 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-02 11:43:15,138 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 107 transitions. [2020-12-02 11:43:15,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-02 11:43:15,139 INFO L414 BasicCegarLoop]: Found error trace [2020-12-02 11:43:15,139 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-02 11:43:15,140 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-02 11:43:15,140 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-02 11:43:15,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-02 11:43:15,141 INFO L82 PathProgramCache]: Analyzing trace with hash 266866190, now seen corresponding path program 2 times [2020-12-02 11:43:15,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-02 11:43:15,142 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104820021] [2020-12-02 11:43:15,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-02 11:43:15,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-02 11:43:15,259 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 11:43:15,259 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104820021] [2020-12-02 11:43:15,259 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-02 11:43:15,260 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-02 11:43:15,260 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489884196] [2020-12-02 11:43:15,260 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-02 11:43:15,261 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-02 11:43:15,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-02 11:43:15,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-02 11:43:15,262 INFO L87 Difference]: Start difference. First operand 45 states and 107 transitions. Second operand 6 states. [2020-12-02 11:43:15,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-02 11:43:15,333 INFO L93 Difference]: Finished difference Result 78 states and 180 transitions. [2020-12-02 11:43:15,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-02 11:43:15,334 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-12-02 11:43:15,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-02 11:43:15,336 INFO L225 Difference]: With dead ends: 78 [2020-12-02 11:43:15,336 INFO L226 Difference]: Without dead ends: 71 [2020-12-02 11:43:15,337 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-12-02 11:43:15,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-12-02 11:43:15,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 46. [2020-12-02 11:43:15,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-12-02 11:43:15,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 113 transitions. [2020-12-02 11:43:15,344 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 113 transitions. Word has length 10 [2020-12-02 11:43:15,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-02 11:43:15,344 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 113 transitions. [2020-12-02 11:43:15,344 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-02 11:43:15,345 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 113 transitions. [2020-12-02 11:43:15,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-02 11:43:15,345 INFO L414 BasicCegarLoop]: Found error trace [2020-12-02 11:43:15,346 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-02 11:43:15,346 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-02 11:43:15,346 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-02 11:43:15,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-02 11:43:15,347 INFO L82 PathProgramCache]: Analyzing trace with hash 266888510, now seen corresponding path program 3 times [2020-12-02 11:43:15,347 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-02 11:43:15,348 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435617179] [2020-12-02 11:43:15,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-02 11:43:15,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-02 11:43:15,412 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 11:43:15,413 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435617179] [2020-12-02 11:43:15,413 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-02 11:43:15,413 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-02 11:43:15,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235326852] [2020-12-02 11:43:15,414 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-02 11:43:15,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-02 11:43:15,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-02 11:43:15,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-12-02 11:43:15,416 INFO L87 Difference]: Start difference. First operand 46 states and 113 transitions. Second operand 6 states. [2020-12-02 11:43:15,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-02 11:43:15,515 INFO L93 Difference]: Finished difference Result 54 states and 125 transitions. [2020-12-02 11:43:15,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-02 11:43:15,516 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-12-02 11:43:15,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-02 11:43:15,521 INFO L225 Difference]: With dead ends: 54 [2020-12-02 11:43:15,521 INFO L226 Difference]: Without dead ends: 43 [2020-12-02 11:43:15,521 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-12-02 11:43:15,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-12-02 11:43:15,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 34. [2020-12-02 11:43:15,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-12-02 11:43:15,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 80 transitions. [2020-12-02 11:43:15,526 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 80 transitions. Word has length 10 [2020-12-02 11:43:15,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-02 11:43:15,526 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 80 transitions. [2020-12-02 11:43:15,526 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-02 11:43:15,526 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 80 transitions. [2020-12-02 11:43:15,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-02 11:43:15,527 INFO L414 BasicCegarLoop]: Found error trace [2020-12-02 11:43:15,527 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-02 11:43:15,527 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-02 11:43:15,527 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-02 11:43:15,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-02 11:43:15,528 INFO L82 PathProgramCache]: Analyzing trace with hash 266773190, now seen corresponding path program 4 times [2020-12-02 11:43:15,528 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-02 11:43:15,528 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816804151] [2020-12-02 11:43:15,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-02 11:43:15,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-02 11:43:15,584 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 11:43:15,584 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816804151] [2020-12-02 11:43:15,585 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-02 11:43:15,585 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-02 11:43:15,585 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461572238] [2020-12-02 11:43:15,585 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-02 11:43:15,585 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-02 11:43:15,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-02 11:43:15,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-12-02 11:43:15,586 INFO L87 Difference]: Start difference. First operand 34 states and 80 transitions. Second operand 6 states. [2020-12-02 11:43:15,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-02 11:43:15,702 INFO L93 Difference]: Finished difference Result 55 states and 129 transitions. [2020-12-02 11:43:15,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-02 11:43:15,703 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-12-02 11:43:15,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-02 11:43:15,703 INFO L225 Difference]: With dead ends: 55 [2020-12-02 11:43:15,703 INFO L226 Difference]: Without dead ends: 49 [2020-12-02 11:43:15,704 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2020-12-02 11:43:15,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-12-02 11:43:15,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 40. [2020-12-02 11:43:15,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-12-02 11:43:15,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 97 transitions. [2020-12-02 11:43:15,708 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 97 transitions. Word has length 10 [2020-12-02 11:43:15,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-02 11:43:15,708 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 97 transitions. [2020-12-02 11:43:15,709 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-02 11:43:15,709 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 97 transitions. [2020-12-02 11:43:15,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-02 11:43:15,709 INFO L414 BasicCegarLoop]: Found error trace [2020-12-02 11:43:15,709 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-02 11:43:15,710 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-02 11:43:15,710 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-02 11:43:15,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-02 11:43:15,710 INFO L82 PathProgramCache]: Analyzing trace with hash -1755209235, now seen corresponding path program 5 times [2020-12-02 11:43:15,710 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-02 11:43:15,711 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745161527] [2020-12-02 11:43:15,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-02 11:43:15,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-02 11:43:15,813 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 11:43:15,816 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745161527] [2020-12-02 11:43:15,816 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1879390874] [2020-12-02 11:43:15,817 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/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 [2020-12-02 11:43:15,895 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-02 11:43:15,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-02 11:43:15,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-02 11:43:15,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-02 11:43:16,036 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 11:43:16,036 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-02 11:43:16,037 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-12-02 11:43:16,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803235677] [2020-12-02 11:43:16,039 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-02 11:43:16,040 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-02 11:43:16,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-02 11:43:16,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-12-02 11:43:16,043 INFO L87 Difference]: Start difference. First operand 40 states and 97 transitions. Second operand 8 states. [2020-12-02 11:43:16,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-02 11:43:16,101 INFO L93 Difference]: Finished difference Result 55 states and 127 transitions. [2020-12-02 11:43:16,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-02 11:43:16,102 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-12-02 11:43:16,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-02 11:43:16,102 INFO L225 Difference]: With dead ends: 55 [2020-12-02 11:43:16,102 INFO L226 Difference]: Without dead ends: 49 [2020-12-02 11:43:16,103 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-12-02 11:43:16,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-12-02 11:43:16,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 43. [2020-12-02 11:43:16,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-12-02 11:43:16,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 103 transitions. [2020-12-02 11:43:16,107 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 103 transitions. Word has length 11 [2020-12-02 11:43:16,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-02 11:43:16,108 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 103 transitions. [2020-12-02 11:43:16,108 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-02 11:43:16,108 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 103 transitions. [2020-12-02 11:43:16,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-02 11:43:16,109 INFO L414 BasicCegarLoop]: Found error trace [2020-12-02 11:43:16,109 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-02 11:43:16,322 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-12-02 11:43:16,323 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-02 11:43:16,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-02 11:43:16,324 INFO L82 PathProgramCache]: Analyzing trace with hash -316364261, now seen corresponding path program 6 times [2020-12-02 11:43:16,324 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-02 11:43:16,325 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622750934] [2020-12-02 11:43:16,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-02 11:43:16,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-02 11:43:16,448 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 11:43:16,449 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622750934] [2020-12-02 11:43:16,449 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [921575470] [2020-12-02 11:43:16,449 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/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 [2020-12-02 11:43:16,590 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-12-02 11:43:16,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-02 11:43:16,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-02 11:43:16,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-02 11:43:16,643 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-02 11:43:16,666 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 11:43:16,667 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-02 11:43:16,667 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2020-12-02 11:43:16,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304674053] [2020-12-02 11:43:16,668 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-02 11:43:16,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-02 11:43:16,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-02 11:43:16,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-12-02 11:43:16,669 INFO L87 Difference]: Start difference. First operand 43 states and 103 transitions. Second operand 9 states. [2020-12-02 11:43:16,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-02 11:43:16,790 INFO L93 Difference]: Finished difference Result 72 states and 169 transitions. [2020-12-02 11:43:16,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-02 11:43:16,791 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 11 [2020-12-02 11:43:16,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-02 11:43:16,792 INFO L225 Difference]: With dead ends: 72 [2020-12-02 11:43:16,793 INFO L226 Difference]: Without dead ends: 62 [2020-12-02 11:43:16,793 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2020-12-02 11:43:16,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-12-02 11:43:16,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 51. [2020-12-02 11:43:16,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-12-02 11:43:16,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 121 transitions. [2020-12-02 11:43:16,803 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 121 transitions. Word has length 11 [2020-12-02 11:43:16,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-02 11:43:16,804 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 121 transitions. [2020-12-02 11:43:16,804 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-02 11:43:16,804 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 121 transitions. [2020-12-02 11:43:16,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-02 11:43:16,812 INFO L414 BasicCegarLoop]: Found error trace [2020-12-02 11:43:16,812 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-02 11:43:17,027 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-12-02 11:43:17,029 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-02 11:43:17,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-02 11:43:17,029 INFO L82 PathProgramCache]: Analyzing trace with hash -1328990746, now seen corresponding path program 7 times [2020-12-02 11:43:17,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-02 11:43:17,030 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978640749] [2020-12-02 11:43:17,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-02 11:43:17,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-02 11:43:17,098 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-02 11:43:17,098 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978640749] [2020-12-02 11:43:17,098 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852135551] [2020-12-02 11:43:17,098 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/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 [2020-12-02 11:43:17,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-02 11:43:17,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-02 11:43:17,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-02 11:43:17,227 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-02 11:43:17,228 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-02 11:43:17,228 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-12-02 11:43:17,228 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935235174] [2020-12-02 11:43:17,229 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-02 11:43:17,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-02 11:43:17,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-02 11:43:17,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-12-02 11:43:17,230 INFO L87 Difference]: Start difference. First operand 51 states and 121 transitions. Second operand 8 states. [2020-12-02 11:43:17,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-02 11:43:17,342 INFO L93 Difference]: Finished difference Result 92 states and 215 transitions. [2020-12-02 11:43:17,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-02 11:43:17,343 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2020-12-02 11:43:17,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-02 11:43:17,345 INFO L225 Difference]: With dead ends: 92 [2020-12-02 11:43:17,345 INFO L226 Difference]: Without dead ends: 84 [2020-12-02 11:43:17,345 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2020-12-02 11:43:17,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-12-02 11:43:17,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 57. [2020-12-02 11:43:17,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-12-02 11:43:17,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 143 transitions. [2020-12-02 11:43:17,358 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 143 transitions. Word has length 12 [2020-12-02 11:43:17,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-02 11:43:17,359 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 143 transitions. [2020-12-02 11:43:17,359 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-02 11:43:17,359 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 143 transitions. [2020-12-02 11:43:17,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-02 11:43:17,363 INFO L414 BasicCegarLoop]: Found error trace [2020-12-02 11:43:17,363 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-02 11:43:17,576 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2020-12-02 11:43:17,577 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-02 11:43:17,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-02 11:43:17,578 INFO L82 PathProgramCache]: Analyzing trace with hash -1328272662, now seen corresponding path program 8 times [2020-12-02 11:43:17,578 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-02 11:43:17,578 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748548582] [2020-12-02 11:43:17,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-02 11:43:17,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-02 11:43:17,688 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 11:43:17,689 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748548582] [2020-12-02 11:43:17,689 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [335713877] [2020-12-02 11:43:17,689 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/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 [2020-12-02 11:43:17,749 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-02 11:43:17,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-02 11:43:17,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-02 11:43:17,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-02 11:43:17,803 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-02 11:43:17,810 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 11:43:17,811 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-02 11:43:17,812 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-12-02 11:43:17,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973364136] [2020-12-02 11:43:17,815 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-02 11:43:17,816 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-02 11:43:17,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-02 11:43:17,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-12-02 11:43:17,817 INFO L87 Difference]: Start difference. First operand 57 states and 143 transitions. Second operand 9 states. [2020-12-02 11:43:17,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-02 11:43:17,995 INFO L93 Difference]: Finished difference Result 72 states and 172 transitions. [2020-12-02 11:43:17,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-02 11:43:17,996 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-12-02 11:43:17,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-02 11:43:17,997 INFO L225 Difference]: With dead ends: 72 [2020-12-02 11:43:17,997 INFO L226 Difference]: Without dead ends: 59 [2020-12-02 11:43:17,998 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=110, Invalid=196, Unknown=0, NotChecked=0, Total=306 [2020-12-02 11:43:17,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-12-02 11:43:18,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 52. [2020-12-02 11:43:18,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-12-02 11:43:18,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 127 transitions. [2020-12-02 11:43:18,008 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 127 transitions. Word has length 12 [2020-12-02 11:43:18,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-02 11:43:18,008 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 127 transitions. [2020-12-02 11:43:18,008 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-02 11:43:18,008 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 127 transitions. [2020-12-02 11:43:18,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-02 11:43:18,010 INFO L414 BasicCegarLoop]: Found error trace [2020-12-02 11:43:18,011 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-02 11:43:18,225 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-02 11:43:18,225 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-02 11:43:18,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-02 11:43:18,227 INFO L82 PathProgramCache]: Analyzing trace with hash 1277025601, now seen corresponding path program 9 times [2020-12-02 11:43:18,227 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-02 11:43:18,227 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002319120] [2020-12-02 11:43:18,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-02 11:43:18,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-02 11:43:18,350 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-02 11:43:18,351 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002319120] [2020-12-02 11:43:18,352 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1393090575] [2020-12-02 11:43:18,352 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/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 [2020-12-02 11:43:18,417 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-02 11:43:18,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-02 11:43:18,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-02 11:43:18,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-02 11:43:18,494 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-02 11:43:18,495 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-02 11:43:18,495 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2020-12-02 11:43:18,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669686557] [2020-12-02 11:43:18,496 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-02 11:43:18,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-02 11:43:18,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-02 11:43:18,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-12-02 11:43:18,498 INFO L87 Difference]: Start difference. First operand 52 states and 127 transitions. Second operand 10 states. [2020-12-02 11:43:18,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-02 11:43:18,633 INFO L93 Difference]: Finished difference Result 73 states and 169 transitions. [2020-12-02 11:43:18,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-02 11:43:18,634 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-12-02 11:43:18,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-02 11:43:18,634 INFO L225 Difference]: With dead ends: 73 [2020-12-02 11:43:18,635 INFO L226 Difference]: Without dead ends: 65 [2020-12-02 11:43:18,635 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2020-12-02 11:43:18,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-12-02 11:43:18,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 54. [2020-12-02 11:43:18,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-12-02 11:43:18,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 131 transitions. [2020-12-02 11:43:18,644 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 131 transitions. Word has length 13 [2020-12-02 11:43:18,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-02 11:43:18,646 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 131 transitions. [2020-12-02 11:43:18,646 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-02 11:43:18,646 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 131 transitions. [2020-12-02 11:43:18,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-02 11:43:18,647 INFO L414 BasicCegarLoop]: Found error trace [2020-12-02 11:43:18,647 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-02 11:43:18,860 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-12-02 11:43:18,861 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-02 11:43:18,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-02 11:43:18,862 INFO L82 PathProgramCache]: Analyzing trace with hash 226675059, now seen corresponding path program 10 times [2020-12-02 11:43:18,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-02 11:43:18,862 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145711607] [2020-12-02 11:43:18,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-02 11:43:18,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-02 11:43:18,937 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-02 11:43:18,937 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145711607] [2020-12-02 11:43:18,937 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1978880044] [2020-12-02 11:43:18,938 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/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 [2020-12-02 11:43:19,019 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-02 11:43:19,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-02 11:43:19,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-02 11:43:19,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-02 11:43:19,068 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-02 11:43:19,068 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-02 11:43:19,069 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-12-02 11:43:19,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827043840] [2020-12-02 11:43:19,070 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-02 11:43:19,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-02 11:43:19,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-02 11:43:19,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-12-02 11:43:19,072 INFO L87 Difference]: Start difference. First operand 54 states and 131 transitions. Second operand 9 states. [2020-12-02 11:43:19,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-02 11:43:19,167 INFO L93 Difference]: Finished difference Result 80 states and 183 transitions. [2020-12-02 11:43:19,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-02 11:43:19,168 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2020-12-02 11:43:19,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-02 11:43:19,170 INFO L225 Difference]: With dead ends: 80 [2020-12-02 11:43:19,170 INFO L226 Difference]: Without dead ends: 73 [2020-12-02 11:43:19,171 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2020-12-02 11:43:19,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-12-02 11:43:19,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 52. [2020-12-02 11:43:19,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-12-02 11:43:19,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 127 transitions. [2020-12-02 11:43:19,178 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 127 transitions. Word has length 13 [2020-12-02 11:43:19,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-02 11:43:19,178 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 127 transitions. [2020-12-02 11:43:19,178 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-02 11:43:19,178 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 127 transitions. [2020-12-02 11:43:19,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-02 11:43:19,179 INFO L414 BasicCegarLoop]: Found error trace [2020-12-02 11:43:19,179 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-02 11:43:19,392 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-02 11:43:19,393 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-02 11:43:19,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-02 11:43:19,394 INFO L82 PathProgramCache]: Analyzing trace with hash 916634619, now seen corresponding path program 11 times [2020-12-02 11:43:19,394 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-02 11:43:19,395 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508769042] [2020-12-02 11:43:19,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-02 11:43:19,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-02 11:43:19,478 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-02 11:43:19,479 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508769042] [2020-12-02 11:43:19,479 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [414956314] [2020-12-02 11:43:19,479 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/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 [2020-12-02 11:43:19,539 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-02 11:43:19,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-02 11:43:19,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-02 11:43:19,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-02 11:43:19,584 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-02 11:43:19,584 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-02 11:43:19,584 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-12-02 11:43:19,585 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417480244] [2020-12-02 11:43:19,585 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-02 11:43:19,585 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-02 11:43:19,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-02 11:43:19,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-12-02 11:43:19,586 INFO L87 Difference]: Start difference. First operand 52 states and 127 transitions. Second operand 9 states. [2020-12-02 11:43:19,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-02 11:43:19,715 INFO L93 Difference]: Finished difference Result 94 states and 219 transitions. [2020-12-02 11:43:19,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-02 11:43:19,715 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2020-12-02 11:43:19,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-02 11:43:19,716 INFO L225 Difference]: With dead ends: 94 [2020-12-02 11:43:19,716 INFO L226 Difference]: Without dead ends: 86 [2020-12-02 11:43:19,717 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2020-12-02 11:43:19,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-12-02 11:43:19,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 54. [2020-12-02 11:43:19,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-12-02 11:43:19,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 136 transitions. [2020-12-02 11:43:19,720 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 136 transitions. Word has length 13 [2020-12-02 11:43:19,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-02 11:43:19,721 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 136 transitions. [2020-12-02 11:43:19,721 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-02 11:43:19,721 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 136 transitions. [2020-12-02 11:43:19,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-02 11:43:19,721 INFO L414 BasicCegarLoop]: Found error trace [2020-12-02 11:43:19,721 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-02 11:43:19,935 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-12-02 11:43:19,936 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-02 11:43:19,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-02 11:43:19,937 INFO L82 PathProgramCache]: Analyzing trace with hash 917352703, now seen corresponding path program 12 times [2020-12-02 11:43:19,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-02 11:43:19,938 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100368407] [2020-12-02 11:43:19,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-02 11:43:19,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-02 11:43:20,009 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 11:43:20,010 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100368407] [2020-12-02 11:43:20,010 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1580783728] [2020-12-02 11:43:20,010 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/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 [2020-12-02 11:43:20,072 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-12-02 11:43:20,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-02 11:43:20,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-02 11:43:20,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-02 11:43:20,113 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 11:43:20,114 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-02 11:43:20,114 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2020-12-02 11:43:20,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351439511] [2020-12-02 11:43:20,114 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-02 11:43:20,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-02 11:43:20,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-02 11:43:20,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-12-02 11:43:20,115 INFO L87 Difference]: Start difference. First operand 54 states and 136 transitions. Second operand 11 states. [2020-12-02 11:43:20,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-02 11:43:20,379 INFO L93 Difference]: Finished difference Result 89 states and 210 transitions. [2020-12-02 11:43:20,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-02 11:43:20,380 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 13 [2020-12-02 11:43:20,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-02 11:43:20,381 INFO L225 Difference]: With dead ends: 89 [2020-12-02 11:43:20,381 INFO L226 Difference]: Without dead ends: 71 [2020-12-02 11:43:20,381 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=157, Invalid=349, Unknown=0, NotChecked=0, Total=506 [2020-12-02 11:43:20,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-12-02 11:43:20,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 57. [2020-12-02 11:43:20,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-12-02 11:43:20,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 136 transitions. [2020-12-02 11:43:20,385 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 136 transitions. Word has length 13 [2020-12-02 11:43:20,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-02 11:43:20,385 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 136 transitions. [2020-12-02 11:43:20,385 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-02 11:43:20,385 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 136 transitions. [2020-12-02 11:43:20,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-02 11:43:20,386 INFO L414 BasicCegarLoop]: Found error trace [2020-12-02 11:43:20,386 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-02 11:43:20,587 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-12-02 11:43:20,587 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-02 11:43:20,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-02 11:43:20,588 INFO L82 PathProgramCache]: Analyzing trace with hash -1554689406, now seen corresponding path program 13 times [2020-12-02 11:43:20,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-02 11:43:20,589 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274941019] [2020-12-02 11:43:20,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-02 11:43:20,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-02 11:43:20,673 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-02 11:43:20,673 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274941019] [2020-12-02 11:43:20,674 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1824431243] [2020-12-02 11:43:20,674 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/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 [2020-12-02 11:43:20,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-02 11:43:20,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-02 11:43:20,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-02 11:43:20,755 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-02 11:43:20,756 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-02 11:43:20,756 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-12-02 11:43:20,756 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121408622] [2020-12-02 11:43:20,756 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-02 11:43:20,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-02 11:43:20,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-02 11:43:20,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-12-02 11:43:20,757 INFO L87 Difference]: Start difference. First operand 57 states and 136 transitions. Second operand 9 states. [2020-12-02 11:43:20,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-02 11:43:20,892 INFO L93 Difference]: Finished difference Result 74 states and 171 transitions. [2020-12-02 11:43:20,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-02 11:43:20,892 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 14 [2020-12-02 11:43:20,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-02 11:43:20,893 INFO L225 Difference]: With dead ends: 74 [2020-12-02 11:43:20,893 INFO L226 Difference]: Without dead ends: 67 [2020-12-02 11:43:20,894 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2020-12-02 11:43:20,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-12-02 11:43:20,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 58. [2020-12-02 11:43:20,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-12-02 11:43:20,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 139 transitions. [2020-12-02 11:43:20,897 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 139 transitions. Word has length 14 [2020-12-02 11:43:20,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-02 11:43:20,897 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 139 transitions. [2020-12-02 11:43:20,897 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-02 11:43:20,897 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 139 transitions. [2020-12-02 11:43:20,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-02 11:43:20,898 INFO L414 BasicCegarLoop]: Found error trace [2020-12-02 11:43:20,898 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-02 11:43:21,111 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-02 11:43:21,112 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-02 11:43:21,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-02 11:43:21,113 INFO L82 PathProgramCache]: Analyzing trace with hash -864729846, now seen corresponding path program 14 times [2020-12-02 11:43:21,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-02 11:43:21,114 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199389320] [2020-12-02 11:43:21,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-02 11:43:21,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-02 11:43:21,178 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-02 11:43:21,179 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199389320] [2020-12-02 11:43:21,183 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [163673310] [2020-12-02 11:43:21,183 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/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 [2020-12-02 11:43:21,237 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-02 11:43:21,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-02 11:43:21,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-02 11:43:21,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-02 11:43:21,261 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-02 11:43:21,261 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-02 11:43:21,261 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-12-02 11:43:21,261 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649023726] [2020-12-02 11:43:21,262 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-02 11:43:21,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-02 11:43:21,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-02 11:43:21,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-12-02 11:43:21,263 INFO L87 Difference]: Start difference. First operand 58 states and 139 transitions. Second operand 9 states. [2020-12-02 11:43:21,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-02 11:43:21,438 INFO L93 Difference]: Finished difference Result 101 states and 237 transitions. [2020-12-02 11:43:21,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-02 11:43:21,439 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 14 [2020-12-02 11:43:21,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-02 11:43:21,440 INFO L225 Difference]: With dead ends: 101 [2020-12-02 11:43:21,440 INFO L226 Difference]: Without dead ends: 93 [2020-12-02 11:43:21,441 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=128, Invalid=252, Unknown=0, NotChecked=0, Total=380 [2020-12-02 11:43:21,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-12-02 11:43:21,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 65. [2020-12-02 11:43:21,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-12-02 11:43:21,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 163 transitions. [2020-12-02 11:43:21,444 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 163 transitions. Word has length 14 [2020-12-02 11:43:21,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-02 11:43:21,445 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 163 transitions. [2020-12-02 11:43:21,445 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-02 11:43:21,445 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 163 transitions. [2020-12-02 11:43:21,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-02 11:43:21,445 INFO L414 BasicCegarLoop]: Found error trace [2020-12-02 11:43:21,445 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-02 11:43:21,660 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-02 11:43:21,661 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-02 11:43:21,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-02 11:43:21,663 INFO L82 PathProgramCache]: Analyzing trace with hash -864011762, now seen corresponding path program 15 times [2020-12-02 11:43:21,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-02 11:43:21,665 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358688360] [2020-12-02 11:43:21,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-02 11:43:21,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-02 11:43:21,742 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 11:43:21,742 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358688360] [2020-12-02 11:43:21,742 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1102168778] [2020-12-02 11:43:21,743 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/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 [2020-12-02 11:43:21,812 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-02 11:43:21,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-02 11:43:21,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-02 11:43:21,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-02 11:43:21,860 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 11:43:21,861 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-02 11:43:21,861 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2020-12-02 11:43:21,861 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484127833] [2020-12-02 11:43:21,862 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-02 11:43:21,862 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-02 11:43:21,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-02 11:43:21,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2020-12-02 11:43:21,863 INFO L87 Difference]: Start difference. First operand 65 states and 163 transitions. Second operand 12 states. [2020-12-02 11:43:22,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-02 11:43:22,205 INFO L93 Difference]: Finished difference Result 96 states and 229 transitions. [2020-12-02 11:43:22,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-02 11:43:22,205 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 14 [2020-12-02 11:43:22,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-02 11:43:22,206 INFO L225 Difference]: With dead ends: 96 [2020-12-02 11:43:22,207 INFO L226 Difference]: Without dead ends: 78 [2020-12-02 11:43:22,207 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=189, Invalid=461, Unknown=0, NotChecked=0, Total=650 [2020-12-02 11:43:22,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-12-02 11:43:22,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 47. [2020-12-02 11:43:22,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-12-02 11:43:22,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 113 transitions. [2020-12-02 11:43:22,210 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 113 transitions. Word has length 14 [2020-12-02 11:43:22,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-02 11:43:22,211 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 113 transitions. [2020-12-02 11:43:22,211 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-02 11:43:22,211 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 113 transitions. [2020-12-02 11:43:22,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-02 11:43:22,211 INFO L414 BasicCegarLoop]: Found error trace [2020-12-02 11:43:22,211 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-02 11:43:22,419 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-02 11:43:22,420 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-02 11:43:22,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-02 11:43:22,421 INFO L82 PathProgramCache]: Analyzing trace with hash -1138913507, now seen corresponding path program 16 times [2020-12-02 11:43:22,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-02 11:43:22,422 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221870946] [2020-12-02 11:43:22,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-02 11:43:22,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-02 11:43:22,515 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-02 11:43:22,516 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221870946] [2020-12-02 11:43:22,516 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [430861125] [2020-12-02 11:43:22,516 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/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 [2020-12-02 11:43:22,585 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-02 11:43:22,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-02 11:43:22,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-02 11:43:22,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-02 11:43:22,643 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-02 11:43:22,644 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-02 11:43:22,644 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2020-12-02 11:43:22,645 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717379317] [2020-12-02 11:43:22,645 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-02 11:43:22,645 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-02 11:43:22,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-02 11:43:22,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2020-12-02 11:43:22,647 INFO L87 Difference]: Start difference. First operand 47 states and 113 transitions. Second operand 12 states. [2020-12-02 11:43:22,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-02 11:43:22,805 INFO L93 Difference]: Finished difference Result 66 states and 151 transitions. [2020-12-02 11:43:22,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-02 11:43:22,805 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-12-02 11:43:22,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-02 11:43:22,806 INFO L225 Difference]: With dead ends: 66 [2020-12-02 11:43:22,806 INFO L226 Difference]: Without dead ends: 59 [2020-12-02 11:43:22,807 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=124, Invalid=256, Unknown=0, NotChecked=0, Total=380 [2020-12-02 11:43:22,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-12-02 11:43:22,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 54. [2020-12-02 11:43:22,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-12-02 11:43:22,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 127 transitions. [2020-12-02 11:43:22,810 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 127 transitions. Word has length 15 [2020-12-02 11:43:22,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-02 11:43:22,810 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 127 transitions. [2020-12-02 11:43:22,811 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-02 11:43:22,811 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 127 transitions. [2020-12-02 11:43:22,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-02 11:43:22,811 INFO L414 BasicCegarLoop]: Found error trace [2020-12-02 11:43:22,812 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-02 11:43:23,025 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-02 11:43:23,026 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-02 11:43:23,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-02 11:43:23,027 INFO L82 PathProgramCache]: Analyzing trace with hash -1208469809, now seen corresponding path program 17 times [2020-12-02 11:43:23,028 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-02 11:43:23,028 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275159017] [2020-12-02 11:43:23,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-02 11:43:23,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-02 11:43:23,112 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-02 11:43:23,113 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275159017] [2020-12-02 11:43:23,113 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1142804788] [2020-12-02 11:43:23,113 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/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 [2020-12-02 11:43:23,183 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-12-02 11:43:23,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-02 11:43:23,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-02 11:43:23,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-02 11:43:23,221 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-02 11:43:23,222 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-02 11:43:23,222 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-12-02 11:43:23,223 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906432681] [2020-12-02 11:43:23,223 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-02 11:43:23,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-02 11:43:23,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-02 11:43:23,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-12-02 11:43:23,224 INFO L87 Difference]: Start difference. First operand 54 states and 127 transitions. Second operand 11 states. [2020-12-02 11:43:23,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-02 11:43:23,337 INFO L93 Difference]: Finished difference Result 92 states and 207 transitions. [2020-12-02 11:43:23,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-02 11:43:23,338 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-12-02 11:43:23,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-02 11:43:23,339 INFO L225 Difference]: With dead ends: 92 [2020-12-02 11:43:23,339 INFO L226 Difference]: Without dead ends: 85 [2020-12-02 11:43:23,339 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2020-12-02 11:43:23,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-12-02 11:43:23,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 58. [2020-12-02 11:43:23,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-12-02 11:43:23,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 139 transitions. [2020-12-02 11:43:23,343 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 139 transitions. Word has length 15 [2020-12-02 11:43:23,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-02 11:43:23,343 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 139 transitions. [2020-12-02 11:43:23,343 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-02 11:43:23,344 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 139 transitions. [2020-12-02 11:43:23,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-02 11:43:23,344 INFO L414 BasicCegarLoop]: Found error trace [2020-12-02 11:43:23,344 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-02 11:43:23,558 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-12-02 11:43:23,559 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-02 11:43:23,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-02 11:43:23,560 INFO L82 PathProgramCache]: Analyzing trace with hash 417703767, now seen corresponding path program 18 times [2020-12-02 11:43:23,560 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-02 11:43:23,560 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778203151] [2020-12-02 11:43:23,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-02 11:43:23,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-02 11:43:23,646 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-02 11:43:23,646 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778203151] [2020-12-02 11:43:23,647 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [13192054] [2020-12-02 11:43:23,647 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/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 [2020-12-02 11:43:23,717 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-12-02 11:43:23,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-02 11:43:23,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-02 11:43:23,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-02 11:43:23,763 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-02 11:43:23,763 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-02 11:43:23,763 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-12-02 11:43:23,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852331300] [2020-12-02 11:43:23,764 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-02 11:43:23,764 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-02 11:43:23,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-02 11:43:23,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-12-02 11:43:23,765 INFO L87 Difference]: Start difference. First operand 58 states and 139 transitions. Second operand 11 states. [2020-12-02 11:43:23,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-02 11:43:23,904 INFO L93 Difference]: Finished difference Result 90 states and 205 transitions. [2020-12-02 11:43:23,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-02 11:43:23,905 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-12-02 11:43:23,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-02 11:43:23,906 INFO L225 Difference]: With dead ends: 90 [2020-12-02 11:43:23,906 INFO L226 Difference]: Without dead ends: 83 [2020-12-02 11:43:23,906 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=114, Invalid=266, Unknown=0, NotChecked=0, Total=380 [2020-12-02 11:43:23,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-12-02 11:43:23,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 60. [2020-12-02 11:43:23,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-12-02 11:43:23,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 145 transitions. [2020-12-02 11:43:23,909 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 145 transitions. Word has length 15 [2020-12-02 11:43:23,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-02 11:43:23,910 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 145 transitions. [2020-12-02 11:43:23,910 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-02 11:43:23,910 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 145 transitions. [2020-12-02 11:43:23,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-02 11:43:23,910 INFO L414 BasicCegarLoop]: Found error trace [2020-12-02 11:43:23,911 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-02 11:43:24,124 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-02 11:43:24,125 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-02 11:43:24,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-02 11:43:24,126 INFO L82 PathProgramCache]: Analyzing trace with hash 1107663327, now seen corresponding path program 19 times [2020-12-02 11:43:24,126 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-02 11:43:24,126 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73120712] [2020-12-02 11:43:24,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-02 11:43:24,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-02 11:43:24,223 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-02 11:43:24,224 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73120712] [2020-12-02 11:43:24,224 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [704522019] [2020-12-02 11:43:24,224 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/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 [2020-12-02 11:43:24,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-02 11:43:24,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-02 11:43:24,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-02 11:43:24,321 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-02 11:43:24,321 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-02 11:43:24,321 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-12-02 11:43:24,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568260784] [2020-12-02 11:43:24,321 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-02 11:43:24,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-02 11:43:24,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-02 11:43:24,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-12-02 11:43:24,323 INFO L87 Difference]: Start difference. First operand 60 states and 145 transitions. Second operand 11 states. [2020-12-02 11:43:24,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-02 11:43:24,534 INFO L93 Difference]: Finished difference Result 112 states and 261 transitions. [2020-12-02 11:43:24,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-02 11:43:24,535 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-12-02 11:43:24,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-02 11:43:24,536 INFO L225 Difference]: With dead ends: 112 [2020-12-02 11:43:24,536 INFO L226 Difference]: Without dead ends: 104 [2020-12-02 11:43:24,537 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=148, Invalid=314, Unknown=0, NotChecked=0, Total=462 [2020-12-02 11:43:24,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-12-02 11:43:24,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 67. [2020-12-02 11:43:24,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-12-02 11:43:24,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 169 transitions. [2020-12-02 11:43:24,541 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 169 transitions. Word has length 15 [2020-12-02 11:43:24,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-02 11:43:24,542 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 169 transitions. [2020-12-02 11:43:24,542 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-02 11:43:24,542 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 169 transitions. [2020-12-02 11:43:24,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-02 11:43:24,543 INFO L414 BasicCegarLoop]: Found error trace [2020-12-02 11:43:24,543 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-02 11:43:24,758 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-12-02 11:43:24,758 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-02 11:43:24,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-02 11:43:24,759 INFO L82 PathProgramCache]: Analyzing trace with hash 1108381411, now seen corresponding path program 20 times [2020-12-02 11:43:24,760 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-02 11:43:24,760 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562307335] [2020-12-02 11:43:24,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-02 11:43:24,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-02 11:43:24,861 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 11:43:24,861 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562307335] [2020-12-02 11:43:24,861 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [574085839] [2020-12-02 11:43:24,861 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/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 [2020-12-02 11:43:24,922 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-02 11:43:24,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-02 11:43:24,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-02 11:43:24,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-02 11:43:24,957 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-02 11:43:24,970 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 11:43:24,970 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-02 11:43:24,970 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2020-12-02 11:43:24,970 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528568689] [2020-12-02 11:43:24,970 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-02 11:43:24,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-02 11:43:24,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-02 11:43:24,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2020-12-02 11:43:24,971 INFO L87 Difference]: Start difference. First operand 67 states and 169 transitions. Second operand 13 states. [2020-12-02 11:43:25,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-02 11:43:25,288 INFO L93 Difference]: Finished difference Result 107 states and 252 transitions. [2020-12-02 11:43:25,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-02 11:43:25,288 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 15 [2020-12-02 11:43:25,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-02 11:43:25,289 INFO L225 Difference]: With dead ends: 107 [2020-12-02 11:43:25,289 INFO L226 Difference]: Without dead ends: 89 [2020-12-02 11:43:25,290 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=225, Invalid=477, Unknown=0, NotChecked=0, Total=702 [2020-12-02 11:43:25,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-12-02 11:43:25,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 63. [2020-12-02 11:43:25,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-12-02 11:43:25,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 150 transitions. [2020-12-02 11:43:25,301 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 150 transitions. Word has length 15 [2020-12-02 11:43:25,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-02 11:43:25,302 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 150 transitions. [2020-12-02 11:43:25,302 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-02 11:43:25,302 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 150 transitions. [2020-12-02 11:43:25,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-02 11:43:25,302 INFO L414 BasicCegarLoop]: Found error trace [2020-12-02 11:43:25,302 INFO L422 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-02 11:43:25,517 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-02 11:43:25,518 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-02 11:43:25,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-02 11:43:25,519 INFO L82 PathProgramCache]: Analyzing trace with hash 592230430, now seen corresponding path program 21 times [2020-12-02 11:43:25,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-02 11:43:25,520 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903370988] [2020-12-02 11:43:25,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-02 11:43:25,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-02 11:43:25,604 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-02 11:43:25,604 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903370988] [2020-12-02 11:43:25,604 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [82128166] [2020-12-02 11:43:25,604 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/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 [2020-12-02 11:43:25,680 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-02 11:43:25,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-02 11:43:25,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-02 11:43:25,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-02 11:43:25,726 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-02 11:43:25,726 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-02 11:43:25,727 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-12-02 11:43:25,727 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162409620] [2020-12-02 11:43:25,727 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-02 11:43:25,727 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-02 11:43:25,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-02 11:43:25,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2020-12-02 11:43:25,728 INFO L87 Difference]: Start difference. First operand 63 states and 150 transitions. Second operand 12 states. [2020-12-02 11:43:25,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-02 11:43:25,910 INFO L93 Difference]: Finished difference Result 82 states and 189 transitions. [2020-12-02 11:43:25,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-02 11:43:25,910 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-12-02 11:43:25,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-02 11:43:25,911 INFO L225 Difference]: With dead ends: 82 [2020-12-02 11:43:25,911 INFO L226 Difference]: Without dead ends: 75 [2020-12-02 11:43:25,912 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=133, Invalid=329, Unknown=0, NotChecked=0, Total=462 [2020-12-02 11:43:25,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-12-02 11:43:25,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 64. [2020-12-02 11:43:25,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-12-02 11:43:25,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 153 transitions. [2020-12-02 11:43:25,915 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 153 transitions. Word has length 16 [2020-12-02 11:43:25,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-02 11:43:25,915 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 153 transitions. [2020-12-02 11:43:25,915 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-02 11:43:25,916 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 153 transitions. [2020-12-02 11:43:25,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-02 11:43:25,916 INFO L414 BasicCegarLoop]: Found error trace [2020-12-02 11:43:25,916 INFO L422 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-02 11:43:26,117 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-12-02 11:43:26,117 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-02 11:43:26,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-02 11:43:26,118 INFO L82 PathProgramCache]: Analyzing trace with hash -2076563290, now seen corresponding path program 22 times [2020-12-02 11:43:26,118 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-02 11:43:26,119 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756513655] [2020-12-02 11:43:26,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-02 11:43:26,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-02 11:43:26,213 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-02 11:43:26,214 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756513655] [2020-12-02 11:43:26,214 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [892799452] [2020-12-02 11:43:26,214 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/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 [2020-12-02 11:43:26,274 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-02 11:43:26,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-02 11:43:26,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-02 11:43:26,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-02 11:43:26,310 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-02 11:43:26,310 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-02 11:43:26,310 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-12-02 11:43:26,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236579193] [2020-12-02 11:43:26,311 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-02 11:43:26,311 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-02 11:43:26,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-02 11:43:26,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-12-02 11:43:26,311 INFO L87 Difference]: Start difference. First operand 64 states and 153 transitions. Second operand 12 states. [2020-12-02 11:43:26,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-02 11:43:26,536 INFO L93 Difference]: Finished difference Result 87 states and 201 transitions. [2020-12-02 11:43:26,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-02 11:43:26,536 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-12-02 11:43:26,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-02 11:43:26,537 INFO L225 Difference]: With dead ends: 87 [2020-12-02 11:43:26,537 INFO L226 Difference]: Without dead ends: 80 [2020-12-02 11:43:26,538 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=180, Invalid=420, Unknown=0, NotChecked=0, Total=600 [2020-12-02 11:43:26,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-12-02 11:43:26,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 66. [2020-12-02 11:43:26,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-12-02 11:43:26,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 159 transitions. [2020-12-02 11:43:26,541 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 159 transitions. Word has length 16 [2020-12-02 11:43:26,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-02 11:43:26,541 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 159 transitions. [2020-12-02 11:43:26,541 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-02 11:43:26,541 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 159 transitions. [2020-12-02 11:43:26,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-02 11:43:26,542 INFO L414 BasicCegarLoop]: Found error trace [2020-12-02 11:43:26,542 INFO L422 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-02 11:43:26,754 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-12-02 11:43:26,755 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-02 11:43:26,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-02 11:43:26,756 INFO L82 PathProgramCache]: Analyzing trace with hash -1386603730, now seen corresponding path program 23 times [2020-12-02 11:43:26,756 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-02 11:43:26,756 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110151441] [2020-12-02 11:43:26,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-02 11:43:26,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-02 11:43:26,842 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-02 11:43:26,842 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110151441] [2020-12-02 11:43:26,842 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1294772978] [2020-12-02 11:43:26,843 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/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 [2020-12-02 11:43:26,910 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-12-02 11:43:26,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-02 11:43:26,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-02 11:43:26,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-02 11:43:26,944 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-02 11:43:26,944 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-02 11:43:26,944 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-12-02 11:43:26,945 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836706687] [2020-12-02 11:43:26,945 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-02 11:43:26,945 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-02 11:43:26,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-02 11:43:26,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2020-12-02 11:43:26,946 INFO L87 Difference]: Start difference. First operand 66 states and 159 transitions. Second operand 12 states. [2020-12-02 11:43:27,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-02 11:43:27,228 INFO L93 Difference]: Finished difference Result 109 states and 257 transitions. [2020-12-02 11:43:27,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-02 11:43:27,228 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-12-02 11:43:27,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-02 11:43:27,229 INFO L225 Difference]: With dead ends: 109 [2020-12-02 11:43:27,229 INFO L226 Difference]: Without dead ends: 101 [2020-12-02 11:43:27,230 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=227, Invalid=475, Unknown=0, NotChecked=0, Total=702 [2020-12-02 11:43:27,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-12-02 11:43:27,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 73. [2020-12-02 11:43:27,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-12-02 11:43:27,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 183 transitions. [2020-12-02 11:43:27,233 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 183 transitions. Word has length 16 [2020-12-02 11:43:27,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-02 11:43:27,234 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 183 transitions. [2020-12-02 11:43:27,234 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-02 11:43:27,234 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 183 transitions. [2020-12-02 11:43:27,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-02 11:43:27,234 INFO L414 BasicCegarLoop]: Found error trace [2020-12-02 11:43:27,234 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-02 11:43:27,444 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-12-02 11:43:27,445 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-02 11:43:27,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-02 11:43:27,446 INFO L82 PathProgramCache]: Analyzing trace with hash -1385885646, now seen corresponding path program 24 times [2020-12-02 11:43:27,446 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-02 11:43:27,446 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798895796] [2020-12-02 11:43:27,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-02 11:43:27,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-02 11:43:27,530 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 11:43:27,530 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798895796] [2020-12-02 11:43:27,530 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [857236344] [2020-12-02 11:43:27,530 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/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 [2020-12-02 11:43:27,602 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-12-02 11:43:27,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-02 11:43:27,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-02 11:43:27,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-02 11:43:27,640 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 11:43:27,640 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-02 11:43:27,641 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-12-02 11:43:27,641 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117794265] [2020-12-02 11:43:27,641 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-02 11:43:27,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-02 11:43:27,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-02 11:43:27,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2020-12-02 11:43:27,642 INFO L87 Difference]: Start difference. First operand 73 states and 183 transitions. Second operand 13 states. [2020-12-02 11:43:27,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-02 11:43:27,992 INFO L93 Difference]: Finished difference Result 88 states and 212 transitions. [2020-12-02 11:43:27,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-02 11:43:27,992 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-12-02 11:43:27,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-02 11:43:27,993 INFO L225 Difference]: With dead ends: 88 [2020-12-02 11:43:27,993 INFO L226 Difference]: Without dead ends: 75 [2020-12-02 11:43:27,994 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=259, Invalid=611, Unknown=0, NotChecked=0, Total=870 [2020-12-02 11:43:27,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-12-02 11:43:27,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 68. [2020-12-02 11:43:27,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-12-02 11:43:27,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 167 transitions. [2020-12-02 11:43:27,997 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 167 transitions. Word has length 16 [2020-12-02 11:43:27,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-02 11:43:27,997 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 167 transitions. [2020-12-02 11:43:27,997 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-02 11:43:27,997 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 167 transitions. [2020-12-02 11:43:27,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-02 11:43:27,997 INFO L414 BasicCegarLoop]: Found error trace [2020-12-02 11:43:27,997 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-02 11:43:28,210 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-12-02 11:43:28,211 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-02 11:43:28,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-02 11:43:28,212 INFO L82 PathProgramCache]: Analyzing trace with hash 720910841, now seen corresponding path program 25 times [2020-12-02 11:43:28,212 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-02 11:43:28,212 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76898063] [2020-12-02 11:43:28,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-02 11:43:28,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-02 11:43:28,320 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-02 11:43:28,320 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76898063] [2020-12-02 11:43:28,320 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [929260445] [2020-12-02 11:43:28,321 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/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 [2020-12-02 11:43:28,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-02 11:43:28,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-02 11:43:28,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-02 11:43:28,433 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-02 11:43:28,434 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-02 11:43:28,434 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2020-12-02 11:43:28,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837464928] [2020-12-02 11:43:28,434 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-02 11:43:28,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-02 11:43:28,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-02 11:43:28,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2020-12-02 11:43:28,435 INFO L87 Difference]: Start difference. First operand 68 states and 167 transitions. Second operand 14 states. [2020-12-02 11:43:28,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-02 11:43:28,633 INFO L93 Difference]: Finished difference Result 97 states and 225 transitions. [2020-12-02 11:43:28,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-02 11:43:28,634 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-12-02 11:43:28,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-02 11:43:28,635 INFO L225 Difference]: With dead ends: 97 [2020-12-02 11:43:28,635 INFO L226 Difference]: Without dead ends: 89 [2020-12-02 11:43:28,636 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=177, Invalid=375, Unknown=0, NotChecked=0, Total=552 [2020-12-02 11:43:28,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-12-02 11:43:28,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 70. [2020-12-02 11:43:28,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-12-02 11:43:28,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 171 transitions. [2020-12-02 11:43:28,639 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 171 transitions. Word has length 17 [2020-12-02 11:43:28,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-02 11:43:28,639 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 171 transitions. [2020-12-02 11:43:28,639 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-02 11:43:28,639 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 171 transitions. [2020-12-02 11:43:28,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-02 11:43:28,640 INFO L414 BasicCegarLoop]: Found error trace [2020-12-02 11:43:28,640 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-02 11:43:28,854 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-12-02 11:43:28,855 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-02 11:43:28,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-02 11:43:28,856 INFO L82 PathProgramCache]: Analyzing trace with hash -1698185941, now seen corresponding path program 26 times [2020-12-02 11:43:28,856 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-02 11:43:28,856 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712792561] [2020-12-02 11:43:28,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-02 11:43:28,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-02 11:43:28,966 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-02 11:43:28,967 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712792561] [2020-12-02 11:43:28,967 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1684490163] [2020-12-02 11:43:28,967 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/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 [2020-12-02 11:43:29,036 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-02 11:43:29,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-02 11:43:29,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-02 11:43:29,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-02 11:43:29,070 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-02 11:43:29,070 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-02 11:43:29,070 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-12-02 11:43:29,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447872439] [2020-12-02 11:43:29,072 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-02 11:43:29,072 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-02 11:43:29,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-02 11:43:29,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-12-02 11:43:29,073 INFO L87 Difference]: Start difference. First operand 70 states and 171 transitions. Second operand 13 states. [2020-12-02 11:43:29,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-02 11:43:29,239 INFO L93 Difference]: Finished difference Result 108 states and 247 transitions. [2020-12-02 11:43:29,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-02 11:43:29,240 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-12-02 11:43:29,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-02 11:43:29,241 INFO L225 Difference]: With dead ends: 108 [2020-12-02 11:43:29,241 INFO L226 Difference]: Without dead ends: 101 [2020-12-02 11:43:29,241 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=143, Invalid=319, Unknown=0, NotChecked=0, Total=462 [2020-12-02 11:43:29,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-12-02 11:43:29,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 68. [2020-12-02 11:43:29,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-12-02 11:43:29,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 167 transitions. [2020-12-02 11:43:29,245 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 167 transitions. Word has length 17 [2020-12-02 11:43:29,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-02 11:43:29,245 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 167 transitions. [2020-12-02 11:43:29,246 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-02 11:43:29,246 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 167 transitions. [2020-12-02 11:43:29,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-02 11:43:29,246 INFO L414 BasicCegarLoop]: Found error trace [2020-12-02 11:43:29,246 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-02 11:43:29,460 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-02 11:43:29,461 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-02 11:43:29,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-02 11:43:29,462 INFO L82 PathProgramCache]: Analyzing trace with hash 1981492147, now seen corresponding path program 27 times [2020-12-02 11:43:29,462 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-02 11:43:29,462 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641331797] [2020-12-02 11:43:29,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-02 11:43:29,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-02 11:43:29,551 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-02 11:43:29,551 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641331797] [2020-12-02 11:43:29,552 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [906868016] [2020-12-02 11:43:29,552 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/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 [2020-12-02 11:43:29,613 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-02 11:43:29,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-02 11:43:29,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-02 11:43:29,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-02 11:43:29,658 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-02 11:43:29,659 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-02 11:43:29,659 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-12-02 11:43:29,659 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419374873] [2020-12-02 11:43:29,659 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-02 11:43:29,659 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-02 11:43:29,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-02 11:43:29,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-12-02 11:43:29,660 INFO L87 Difference]: Start difference. First operand 68 states and 167 transitions. Second operand 13 states. [2020-12-02 11:43:29,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-02 11:43:29,886 INFO L93 Difference]: Finished difference Result 99 states and 229 transitions. [2020-12-02 11:43:29,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-02 11:43:29,887 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-12-02 11:43:29,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-02 11:43:29,888 INFO L225 Difference]: With dead ends: 99 [2020-12-02 11:43:29,888 INFO L226 Difference]: Without dead ends: 92 [2020-12-02 11:43:29,889 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=159, Invalid=393, Unknown=0, NotChecked=0, Total=552 [2020-12-02 11:43:29,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-12-02 11:43:29,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 66. [2020-12-02 11:43:29,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-12-02 11:43:29,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 163 transitions. [2020-12-02 11:43:29,892 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 163 transitions. Word has length 17 [2020-12-02 11:43:29,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-02 11:43:29,892 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 163 transitions. [2020-12-02 11:43:29,892 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-02 11:43:29,892 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 163 transitions. [2020-12-02 11:43:29,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-02 11:43:29,893 INFO L414 BasicCegarLoop]: Found error trace [2020-12-02 11:43:29,893 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-02 11:43:30,107 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2020-12-02 11:43:30,108 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-02 11:43:30,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-02 11:43:30,109 INFO L82 PathProgramCache]: Analyzing trace with hash -687301573, now seen corresponding path program 28 times [2020-12-02 11:43:30,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-02 11:43:30,109 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321609886] [2020-12-02 11:43:30,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-02 11:43:30,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-02 11:43:30,202 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-02 11:43:30,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321609886] [2020-12-02 11:43:30,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1726385498] [2020-12-02 11:43:30,202 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/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 [2020-12-02 11:43:30,273 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-02 11:43:30,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-02 11:43:30,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-02 11:43:30,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-02 11:43:30,309 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-02 11:43:30,310 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-02 11:43:30,310 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-12-02 11:43:30,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593652030] [2020-12-02 11:43:30,311 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-02 11:43:30,311 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-02 11:43:30,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-02 11:43:30,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2020-12-02 11:43:30,313 INFO L87 Difference]: Start difference. First operand 66 states and 163 transitions. Second operand 13 states. [2020-12-02 11:43:30,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-02 11:43:30,546 INFO L93 Difference]: Finished difference Result 93 states and 217 transitions. [2020-12-02 11:43:30,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-02 11:43:30,548 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-12-02 11:43:30,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-02 11:43:30,549 INFO L225 Difference]: With dead ends: 93 [2020-12-02 11:43:30,550 INFO L226 Difference]: Without dead ends: 86 [2020-12-02 11:43:30,550 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=191, Invalid=459, Unknown=0, NotChecked=0, Total=650 [2020-12-02 11:43:30,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-12-02 11:43:30,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 64. [2020-12-02 11:43:30,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-12-02 11:43:30,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 159 transitions. [2020-12-02 11:43:30,554 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 159 transitions. Word has length 17 [2020-12-02 11:43:30,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-02 11:43:30,555 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 159 transitions. [2020-12-02 11:43:30,555 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-02 11:43:30,555 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 159 transitions. [2020-12-02 11:43:30,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-02 11:43:30,555 INFO L414 BasicCegarLoop]: Found error trace [2020-12-02 11:43:30,556 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-02 11:43:30,768 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-02 11:43:30,769 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-02 11:43:30,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-02 11:43:30,770 INFO L82 PathProgramCache]: Analyzing trace with hash 2657987, now seen corresponding path program 29 times [2020-12-02 11:43:30,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-02 11:43:30,770 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482318205] [2020-12-02 11:43:30,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-02 11:43:30,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-02 11:43:30,869 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-02 11:43:30,870 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482318205] [2020-12-02 11:43:30,870 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [590360155] [2020-12-02 11:43:30,870 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/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 [2020-12-02 11:43:30,938 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-12-02 11:43:30,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-02 11:43:30,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-02 11:43:30,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-02 11:43:30,972 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-02 11:43:30,972 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-02 11:43:30,972 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-12-02 11:43:30,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648768848] [2020-12-02 11:43:30,973 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-02 11:43:30,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-02 11:43:30,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-02 11:43:30,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2020-12-02 11:43:30,974 INFO L87 Difference]: Start difference. First operand 64 states and 159 transitions. Second operand 13 states. [2020-12-02 11:43:31,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-02 11:43:31,230 INFO L93 Difference]: Finished difference Result 110 states and 259 transitions. [2020-12-02 11:43:31,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-02 11:43:31,230 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-12-02 11:43:31,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-02 11:43:31,231 INFO L225 Difference]: With dead ends: 110 [2020-12-02 11:43:31,232 INFO L226 Difference]: Without dead ends: 102 [2020-12-02 11:43:31,232 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=239, Invalid=517, Unknown=0, NotChecked=0, Total=756 [2020-12-02 11:43:31,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-12-02 11:43:31,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 66. [2020-12-02 11:43:31,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-12-02 11:43:31,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 168 transitions. [2020-12-02 11:43:31,235 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 168 transitions. Word has length 17 [2020-12-02 11:43:31,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-02 11:43:31,236 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 168 transitions. [2020-12-02 11:43:31,236 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-02 11:43:31,236 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 168 transitions. [2020-12-02 11:43:31,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-02 11:43:31,236 INFO L414 BasicCegarLoop]: Found error trace [2020-12-02 11:43:31,236 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-02 11:43:31,445 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2020-12-02 11:43:31,445 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-02 11:43:31,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-02 11:43:31,446 INFO L82 PathProgramCache]: Analyzing trace with hash 3376071, now seen corresponding path program 30 times [2020-12-02 11:43:31,446 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-02 11:43:31,446 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166461537] [2020-12-02 11:43:31,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-02 11:43:31,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-02 11:43:31,533 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 11:43:31,533 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166461537] [2020-12-02 11:43:31,533 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [322298202] [2020-12-02 11:43:31,533 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/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 [2020-12-02 11:43:31,596 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-12-02 11:43:31,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-02 11:43:31,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-02 11:43:31,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-02 11:43:31,639 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 11:43:31,640 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-02 11:43:31,640 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-12-02 11:43:31,641 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185769012] [2020-12-02 11:43:31,641 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-02 11:43:31,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-02 11:43:31,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-02 11:43:31,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-12-02 11:43:31,642 INFO L87 Difference]: Start difference. First operand 66 states and 168 transitions. Second operand 14 states. [2020-12-02 11:43:32,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-02 11:43:32,108 INFO L93 Difference]: Finished difference Result 90 states and 216 transitions. [2020-12-02 11:43:32,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-02 11:43:32,110 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-12-02 11:43:32,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-02 11:43:32,111 INFO L225 Difference]: With dead ends: 90 [2020-12-02 11:43:32,112 INFO L226 Difference]: Without dead ends: 77 [2020-12-02 11:43:32,112 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=322, Invalid=734, Unknown=0, NotChecked=0, Total=1056 [2020-12-02 11:43:32,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-12-02 11:43:32,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 54. [2020-12-02 11:43:32,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-12-02 11:43:32,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 132 transitions. [2020-12-02 11:43:32,120 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 132 transitions. Word has length 17 [2020-12-02 11:43:32,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-02 11:43:32,120 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 132 transitions. [2020-12-02 11:43:32,120 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-02 11:43:32,120 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 132 transitions. [2020-12-02 11:43:32,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-02 11:43:32,121 INFO L414 BasicCegarLoop]: Found error trace [2020-12-02 11:43:32,121 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-02 11:43:32,335 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-12-02 11:43:32,335 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-02 11:43:32,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-02 11:43:32,336 INFO L82 PathProgramCache]: Analyzing trace with hash 1179278347, now seen corresponding path program 31 times [2020-12-02 11:43:32,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-02 11:43:32,337 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544419803] [2020-12-02 11:43:32,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-02 11:43:32,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-02 11:43:32,458 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 11:43:32,458 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544419803] [2020-12-02 11:43:32,459 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [209653143] [2020-12-02 11:43:32,459 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/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 [2020-12-02 11:43:32,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-02 11:43:32,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-02 11:43:32,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-02 11:43:32,564 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 11:43:32,565 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-02 11:43:32,565 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-12-02 11:43:32,566 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582446837] [2020-12-02 11:43:32,566 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-02 11:43:32,566 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-02 11:43:32,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-02 11:43:32,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2020-12-02 11:43:32,567 INFO L87 Difference]: Start difference. First operand 54 states and 132 transitions. Second operand 14 states. [2020-12-02 11:43:32,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-02 11:43:32,792 INFO L93 Difference]: Finished difference Result 83 states and 191 transitions. [2020-12-02 11:43:32,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-02 11:43:32,794 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-12-02 11:43:32,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-02 11:43:32,795 INFO L225 Difference]: With dead ends: 83 [2020-12-02 11:43:32,795 INFO L226 Difference]: Without dead ends: 77 [2020-12-02 11:43:32,795 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=185, Invalid=465, Unknown=0, NotChecked=0, Total=650 [2020-12-02 11:43:32,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-12-02 11:43:32,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 55. [2020-12-02 11:43:32,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-12-02 11:43:32,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 135 transitions. [2020-12-02 11:43:32,798 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 135 transitions. Word has length 17 [2020-12-02 11:43:32,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-02 11:43:32,798 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 135 transitions. [2020-12-02 11:43:32,798 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-02 11:43:32,798 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 135 transitions. [2020-12-02 11:43:32,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-02 11:43:32,799 INFO L414 BasicCegarLoop]: Found error trace [2020-12-02 11:43:32,799 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-02 11:43:33,012 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2020-12-02 11:43:33,013 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-02 11:43:33,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-02 11:43:33,013 INFO L82 PathProgramCache]: Analyzing trace with hash 51051651, now seen corresponding path program 32 times [2020-12-02 11:43:33,014 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-02 11:43:33,014 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549118643] [2020-12-02 11:43:33,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-02 11:43:33,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-02 11:43:33,132 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 11:43:33,132 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549118643] [2020-12-02 11:43:33,132 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1984673630] [2020-12-02 11:43:33,132 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/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 [2020-12-02 11:43:33,188 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-02 11:43:33,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-02 11:43:33,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-02 11:43:33,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-02 11:43:33,223 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 11:43:33,224 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-02 11:43:33,224 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-12-02 11:43:33,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478044633] [2020-12-02 11:43:33,224 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-02 11:43:33,224 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-02 11:43:33,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-02 11:43:33,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2020-12-02 11:43:33,225 INFO L87 Difference]: Start difference. First operand 55 states and 135 transitions. Second operand 14 states. [2020-12-02 11:43:33,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-02 11:43:33,489 INFO L93 Difference]: Finished difference Result 90 states and 207 transitions. [2020-12-02 11:43:33,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-02 11:43:33,490 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-12-02 11:43:33,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-02 11:43:33,491 INFO L225 Difference]: With dead ends: 90 [2020-12-02 11:43:33,491 INFO L226 Difference]: Without dead ends: 84 [2020-12-02 11:43:33,491 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=233, Invalid=579, Unknown=0, NotChecked=0, Total=812 [2020-12-02 11:43:33,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-12-02 11:43:33,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 57. [2020-12-02 11:43:33,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-12-02 11:43:33,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 141 transitions. [2020-12-02 11:43:33,503 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 141 transitions. Word has length 17 [2020-12-02 11:43:33,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-02 11:43:33,504 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 141 transitions. [2020-12-02 11:43:33,504 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-02 11:43:33,504 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 141 transitions. [2020-12-02 11:43:33,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-02 11:43:33,505 INFO L414 BasicCegarLoop]: Found error trace [2020-12-02 11:43:33,505 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-02 11:43:33,715 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-12-02 11:43:33,716 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-02 11:43:33,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-02 11:43:33,717 INFO L82 PathProgramCache]: Analyzing trace with hash -35038469, now seen corresponding path program 33 times [2020-12-02 11:43:33,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-02 11:43:33,717 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201564708] [2020-12-02 11:43:33,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-02 11:43:33,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-02 11:43:33,818 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 11:43:33,819 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201564708] [2020-12-02 11:43:33,819 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1380254092] [2020-12-02 11:43:33,819 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/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 [2020-12-02 11:43:33,889 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-12-02 11:43:33,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-02 11:43:33,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-02 11:43:33,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-02 11:43:33,927 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 11:43:33,927 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-02 11:43:33,928 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-12-02 11:43:33,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36974592] [2020-12-02 11:43:33,928 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-02 11:43:33,929 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-02 11:43:33,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-02 11:43:33,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2020-12-02 11:43:33,930 INFO L87 Difference]: Start difference. First operand 57 states and 141 transitions. Second operand 14 states. [2020-12-02 11:43:34,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-02 11:43:34,250 INFO L93 Difference]: Finished difference Result 88 states and 205 transitions. [2020-12-02 11:43:34,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-02 11:43:34,250 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-12-02 11:43:34,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-02 11:43:34,251 INFO L225 Difference]: With dead ends: 88 [2020-12-02 11:43:34,251 INFO L226 Difference]: Without dead ends: 82 [2020-12-02 11:43:34,252 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=278, Invalid=652, Unknown=0, NotChecked=0, Total=930 [2020-12-02 11:43:34,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-12-02 11:43:34,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 59. [2020-12-02 11:43:34,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-12-02 11:43:34,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 147 transitions. [2020-12-02 11:43:34,259 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 147 transitions. Word has length 17 [2020-12-02 11:43:34,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-02 11:43:34,259 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 147 transitions. [2020-12-02 11:43:34,260 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-02 11:43:34,260 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 147 transitions. [2020-12-02 11:43:34,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-02 11:43:34,260 INFO L414 BasicCegarLoop]: Found error trace [2020-12-02 11:43:34,260 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-02 11:43:34,474 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-12-02 11:43:34,475 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-02 11:43:34,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-02 11:43:34,476 INFO L82 PathProgramCache]: Analyzing trace with hash -12781709, now seen corresponding path program 34 times [2020-12-02 11:43:34,476 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-02 11:43:34,476 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615723238] [2020-12-02 11:43:34,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-02 11:43:34,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-02 11:43:34,575 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 11:43:34,575 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615723238] [2020-12-02 11:43:34,576 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [635689193] [2020-12-02 11:43:34,576 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/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 [2020-12-02 11:43:34,632 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-02 11:43:34,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-02 11:43:34,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-02 11:43:34,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-02 11:43:34,668 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 11:43:34,668 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-02 11:43:34,669 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-12-02 11:43:34,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751893248] [2020-12-02 11:43:34,669 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-02 11:43:34,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-02 11:43:34,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-02 11:43:34,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2020-12-02 11:43:34,670 INFO L87 Difference]: Start difference. First operand 59 states and 147 transitions. Second operand 14 states. [2020-12-02 11:43:35,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-02 11:43:35,050 INFO L93 Difference]: Finished difference Result 105 states and 249 transitions. [2020-12-02 11:43:35,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-02 11:43:35,051 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-12-02 11:43:35,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-02 11:43:35,052 INFO L225 Difference]: With dead ends: 105 [2020-12-02 11:43:35,052 INFO L226 Difference]: Without dead ends: 99 [2020-12-02 11:43:35,052 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=339, Invalid=717, Unknown=0, NotChecked=0, Total=1056 [2020-12-02 11:43:35,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-12-02 11:43:35,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 64. [2020-12-02 11:43:35,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-12-02 11:43:35,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 165 transitions. [2020-12-02 11:43:35,056 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 165 transitions. Word has length 17 [2020-12-02 11:43:35,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-02 11:43:35,056 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 165 transitions. [2020-12-02 11:43:35,056 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-02 11:43:35,056 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 165 transitions. [2020-12-02 11:43:35,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-02 11:43:35,056 INFO L414 BasicCegarLoop]: Found error trace [2020-12-02 11:43:35,057 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-02 11:43:35,269 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-02 11:43:35,271 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-02 11:43:35,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-02 11:43:35,272 INFO L82 PathProgramCache]: Analyzing trace with hash -12759389, now seen corresponding path program 35 times [2020-12-02 11:43:35,272 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-02 11:43:35,272 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791257180] [2020-12-02 11:43:35,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-02 11:43:35,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-02 11:43:35,375 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 11:43:35,375 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791257180] [2020-12-02 11:43:35,376 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2000907922] [2020-12-02 11:43:35,376 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/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 [2020-12-02 11:43:35,444 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-12-02 11:43:35,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-02 11:43:35,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-02 11:43:35,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-02 11:43:35,492 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 11:43:35,492 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-02 11:43:35,493 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2020-12-02 11:43:35,493 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404991566] [2020-12-02 11:43:35,493 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-02 11:43:35,493 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-02 11:43:35,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-02 11:43:35,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2020-12-02 11:43:35,495 INFO L87 Difference]: Start difference. First operand 64 states and 165 transitions. Second operand 15 states. [2020-12-02 11:43:35,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-02 11:43:35,980 INFO L93 Difference]: Finished difference Result 100 states and 238 transitions. [2020-12-02 11:43:35,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-02 11:43:35,983 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 17 [2020-12-02 11:43:35,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-02 11:43:35,984 INFO L225 Difference]: With dead ends: 100 [2020-12-02 11:43:35,984 INFO L226 Difference]: Without dead ends: 87 [2020-12-02 11:43:35,985 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=379, Invalid=881, Unknown=0, NotChecked=0, Total=1260 [2020-12-02 11:43:35,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-12-02 11:43:35,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 63. [2020-12-02 11:43:35,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-12-02 11:43:35,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 159 transitions. [2020-12-02 11:43:35,988 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 159 transitions. Word has length 17 [2020-12-02 11:43:35,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-02 11:43:35,988 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 159 transitions. [2020-12-02 11:43:35,988 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-02 11:43:35,988 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 159 transitions. [2020-12-02 11:43:35,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-02 11:43:35,988 INFO L414 BasicCegarLoop]: Found error trace [2020-12-02 11:43:35,989 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-02 11:43:36,202 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-12-02 11:43:36,203 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-02 11:43:36,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-02 11:43:36,204 INFO L82 PathProgramCache]: Analyzing trace with hash 873403792, now seen corresponding path program 36 times [2020-12-02 11:43:36,204 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-02 11:43:36,204 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023967510] [2020-12-02 11:43:36,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-02 11:43:36,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-02 11:43:36,215 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-02 11:43:36,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-02 11:43:36,226 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-02 11:43:36,248 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-12-02 11:43:36,248 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-02 11:43:36,248 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-12-02 11:43:36,344 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.12 11:43:36 BasicIcfg [2020-12-02 11:43:36,344 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-02 11:43:36,345 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-02 11:43:36,345 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-02 11:43:36,345 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-02 11:43:36,345 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 11:43:10" (3/4) ... [2020-12-02 11:43:36,348 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-12-02 11:43:36,413 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2020-12-02 11:43:36,413 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-02 11:43:36,414 INFO L168 Benchmark]: Toolchain (without parser) took 27162.22 ms. Allocated memory was 39.8 MB in the beginning and 125.8 MB in the end (delta: 86.0 MB). Free memory was 24.5 MB in the beginning and 66.3 MB in the end (delta: -41.8 MB). Peak memory consumption was 43.8 MB. Max. memory is 16.1 GB. [2020-12-02 11:43:36,415 INFO L168 Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 39.8 MB. Free memory was 24.5 MB in the beginning and 24.5 MB in the end (delta: 70.0 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-02 11:43:36,415 INFO L168 Benchmark]: CACSL2BoogieTranslator took 627.94 ms. Allocated memory was 39.8 MB in the beginning and 48.2 MB in the end (delta: 8.4 MB). Free memory was 24.3 MB in the beginning and 22.6 MB in the end (delta: 1.7 MB). Peak memory consumption was 12.7 MB. Max. memory is 16.1 GB. [2020-12-02 11:43:36,416 INFO L168 Benchmark]: Boogie Procedure Inliner took 83.74 ms. Allocated memory is still 48.2 MB. Free memory was 22.4 MB in the beginning and 20.6 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-02 11:43:36,416 INFO L168 Benchmark]: Boogie Preprocessor took 47.68 ms. Allocated memory is still 48.2 MB. Free memory was 20.6 MB in the beginning and 19.2 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-02 11:43:36,416 INFO L168 Benchmark]: RCFGBuilder took 569.05 ms. Allocated memory is still 48.2 MB. Free memory was 19.2 MB in the beginning and 24.2 MB in the end (delta: -4.9 MB). Peak memory consumption was 2.6 MB. Max. memory is 16.1 GB. [2020-12-02 11:43:36,417 INFO L168 Benchmark]: TraceAbstraction took 25751.29 ms. Allocated memory was 48.2 MB in the beginning and 125.8 MB in the end (delta: 77.6 MB). Free memory was 23.7 MB in the beginning and 71.5 MB in the end (delta: -47.8 MB). Peak memory consumption was 28.4 MB. Max. memory is 16.1 GB. [2020-12-02 11:43:36,417 INFO L168 Benchmark]: Witness Printer took 68.60 ms. Allocated memory is still 125.8 MB. Free memory was 71.5 MB in the beginning and 66.3 MB in the end (delta: 5.2 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2020-12-02 11:43:36,420 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28 ms. Allocated memory is still 39.8 MB. Free memory was 24.5 MB in the beginning and 24.5 MB in the end (delta: 70.0 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 627.94 ms. Allocated memory was 39.8 MB in the beginning and 48.2 MB in the end (delta: 8.4 MB). Free memory was 24.3 MB in the beginning and 22.6 MB in the end (delta: 1.7 MB). Peak memory consumption was 12.7 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 83.74 ms. Allocated memory is still 48.2 MB. Free memory was 22.4 MB in the beginning and 20.6 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 47.68 ms. Allocated memory is still 48.2 MB. Free memory was 20.6 MB in the beginning and 19.2 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 569.05 ms. Allocated memory is still 48.2 MB. Free memory was 19.2 MB in the beginning and 24.2 MB in the end (delta: -4.9 MB). Peak memory consumption was 2.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 25751.29 ms. Allocated memory was 48.2 MB in the beginning and 125.8 MB in the end (delta: 77.6 MB). Free memory was 23.7 MB in the beginning and 71.5 MB in the end (delta: -47.8 MB). Peak memory consumption was 28.4 MB. Max. memory is 16.1 GB. * Witness Printer took 68.60 ms. Allocated memory is still 125.8 MB. Free memory was 71.5 MB in the beginning and 66.3 MB in the end (delta: 5.2 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks 645 VarBasedMoverChecksPositive, 20 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 20 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.2s, 20 CheckedPairsTotal, LiptonReductionStatistics: ReductionTime: 3.1s, 62 PlacesBefore, 20 PlacesAfterwards, 60 TransitionsBefore, 16 TransitionsAfterwards, 968 CoEnabledTransitionPairs, 5 FixpointIterations, 16 TrivialSequentialCompositions, 25 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 9 ConcurrentYvCompositions, 2 ChoiceCompositions, 52 TotalNumberOfCompositions, 998 MoverChecksTotal - CounterExampleResult [Line: 722]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L694] 0 int i = 3, j = 6; [L712] 0 pthread_t id1, id2; [L713] FCALL, FORK 0 pthread_create(&id1, ((void *)0), t1, ((void *)0)) VAL [arg={0:0}, i=3, j=6] [L714] FCALL, FORK 0 pthread_create(&id2, ((void *)0), t2, ((void *)0)) VAL [arg={0:0}, arg={0:0}, i=3, j=6] [L716] 0 int condI = i >= (2*5 +6); VAL [arg={0:0}, arg={0:0}, i=3, j=6] [L704] 2 int k = 0; VAL [arg={0:0}, arg={0:0}, arg={0:0}, i=3, j=6, k=0] [L696] 1 int k = 0; VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=3, j=6, k=0, k=0] [L696] COND TRUE 1 k < 5 [L698] 1 i = j + 1 [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=6, k=1, k=0] [L704] COND TRUE 2 k < 5 [L706] 2 j = i + 1 [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=8, k=1, k=1] [L696] COND TRUE 1 k < 5 [L698] 1 i = j + 1 [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=8, k=2, k=1] [L704] COND TRUE 2 k < 5 [L706] 2 j = i + 1 [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=10, k=2, k=2] [L696] COND TRUE 1 k < 5 [L698] 1 i = j + 1 [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=10, k=3, k=2] [L704] COND TRUE 2 k < 5 [L706] 2 j = i + 1 [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=12, k=3, k=3] [L696] COND TRUE 1 k < 5 [L698] 1 i = j + 1 [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=12, k=3, k=4] [L704] COND TRUE 2 k < 5 [L706] 2 j = i + 1 [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=14, k=4, k=4] [L696] COND TRUE 1 k < 5 [L698] 1 i = j + 1 [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=14, k=5, k=4] [L704] COND TRUE 2 k < 5 [L706] 2 j = i + 1 [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=16, k=5, k=5] [L719] 0 int condJ = j >= (2*5 +6); [L721] COND TRUE 0 condI || condJ [L722] 0 reach_error() VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=16, k=5, k=5] - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 56 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 25.5s, OverallIterations: 40, TraceHistogramMax: 5, AutomataDifference: 7.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 3.1s, HoareTripleCheckerStatistics: 589 SDtfs, 1679 SDslu, 2183 SDs, 0 SdLazy, 2394 SolverSat, 1027 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1098 GetRequests, 398 SyntacticMatches, 0 SemanticMatches, 700 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3060 ImplicationChecksByTransitivity, 6.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=73occurred in iteration=27, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 39 MinimizatonAttempts, 756 StatesRemovedByMinimization, 39 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 1.0s SatisfiabilityAnalysisTime, 4.4s InterpolantComputationTime, 1020 NumberOfCodeBlocks, 1020 NumberOfCodeBlocksAsserted, 120 NumberOfCheckSat, 932 ConstructedInterpolants, 0 QuantifiedInterpolants, 57800 SizeOfPredicates, 209 NumberOfNonLiveVariables, 3570 ConjunctsInSsa, 402 ConjunctsInUnsatCore, 70 InterpolantComputations, 8 PerfectInterpolantSequences, 36/630 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...