./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/parallel-misc-3.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8c2bbc92 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/weaver/parallel-misc-3.wvr.c -s /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash afabfb93c1e265e04efe80e28977b27d25a91660 .......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-8c2bbc9 [2021-10-08 14:37:01,435 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-08 14:37:01,438 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-08 14:37:01,488 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-08 14:37:01,489 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-08 14:37:01,494 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-08 14:37:01,496 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-08 14:37:01,501 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-08 14:37:01,505 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-08 14:37:01,511 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-08 14:37:01,513 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-08 14:37:01,518 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-08 14:37:01,519 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-08 14:37:01,522 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-08 14:37:01,527 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-08 14:37:01,529 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-08 14:37:01,533 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-08 14:37:01,534 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-08 14:37:01,537 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-08 14:37:01,543 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-08 14:37:01,547 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-08 14:37:01,548 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-08 14:37:01,551 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-08 14:37:01,553 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-08 14:37:01,560 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-08 14:37:01,563 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-08 14:37:01,563 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-08 14:37:01,564 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-08 14:37:01,566 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-08 14:37:01,567 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-08 14:37:01,569 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-08 14:37:01,570 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-08 14:37:01,572 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-08 14:37:01,573 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-08 14:37:01,574 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-08 14:37:01,575 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-08 14:37:01,576 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-08 14:37:01,576 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-08 14:37:01,577 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-08 14:37:01,579 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-08 14:37:01,580 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-08 14:37:01,581 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-08 14:37:01,616 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-08 14:37:01,616 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-08 14:37:01,616 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-08 14:37:01,617 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-08 14:37:01,618 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-08 14:37:01,618 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-08 14:37:01,618 INFO L138 SettingsManager]: * Use SBE=true [2021-10-08 14:37:01,619 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-08 14:37:01,619 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-08 14:37:01,619 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-08 14:37:01,619 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-08 14:37:01,619 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-08 14:37:01,620 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-08 14:37:01,620 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-08 14:37:01,620 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-08 14:37:01,620 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-08 14:37:01,620 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-08 14:37:01,620 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-08 14:37:01,621 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-08 14:37:01,621 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-08 14:37:01,621 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-08 14:37:01,621 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-08 14:37:01,621 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-08 14:37:01,622 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-08 14:37:01,622 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-08 14:37:01,622 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-08 14:37:01,622 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-08 14:37:01,622 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-08 14:37:01,623 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-08 14:37:01,623 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-08 14:37:01,623 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> afabfb93c1e265e04efe80e28977b27d25a91660 [2021-10-08 14:37:02,001 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-08 14:37:02,037 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-08 14:37:02,040 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-08 14:37:02,043 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-08 14:37:02,043 INFO L275 PluginConnector]: CDTParser initialized [2021-10-08 14:37:02,045 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/parallel-misc-3.wvr.c [2021-10-08 14:37:02,129 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b9be34f98/534be7ff9f014730ab924736d56042d1/FLAG3829553c9 [2021-10-08 14:37:02,860 INFO L306 CDTParser]: Found 1 translation units. [2021-10-08 14:37:02,861 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/releaseScripts/default/sv-benchmarks/c/weaver/parallel-misc-3.wvr.c [2021-10-08 14:37:02,878 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b9be34f98/534be7ff9f014730ab924736d56042d1/FLAG3829553c9 [2021-10-08 14:37:03,230 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b9be34f98/534be7ff9f014730ab924736d56042d1 [2021-10-08 14:37:03,237 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-08 14:37:03,250 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-08 14:37:03,254 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-08 14:37:03,254 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-08 14:37:03,258 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-08 14:37:03,259 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.10 02:37:03" (1/1) ... [2021-10-08 14:37:03,261 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1ce42baa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.10 02:37:03, skipping insertion in model container [2021-10-08 14:37:03,261 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.10 02:37:03" (1/1) ... [2021-10-08 14:37:03,270 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-08 14:37:03,309 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-08 14:37:03,529 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-2/releaseScripts/default/sv-benchmarks/c/weaver/parallel-misc-3.wvr.c[2273,2286] [2021-10-08 14:37:03,537 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-08 14:37:03,550 INFO L203 MainTranslator]: Completed pre-run [2021-10-08 14:37:03,594 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-2/releaseScripts/default/sv-benchmarks/c/weaver/parallel-misc-3.wvr.c[2273,2286] [2021-10-08 14:37:03,595 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-08 14:37:03,611 INFO L208 MainTranslator]: Completed translation [2021-10-08 14:37:03,612 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.10 02:37:03 WrapperNode [2021-10-08 14:37:03,612 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-08 14:37:03,614 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-08 14:37:03,614 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-08 14:37:03,614 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-08 14:37:03,622 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.10 02:37:03" (1/1) ... [2021-10-08 14:37:03,631 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.10 02:37:03" (1/1) ... [2021-10-08 14:37:03,654 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-08 14:37:03,654 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-08 14:37:03,655 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-08 14:37:03,655 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-08 14:37:03,664 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.10 02:37:03" (1/1) ... [2021-10-08 14:37:03,664 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.10 02:37:03" (1/1) ... [2021-10-08 14:37:03,667 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.10 02:37:03" (1/1) ... [2021-10-08 14:37:03,667 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.10 02:37:03" (1/1) ... [2021-10-08 14:37:03,674 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.10 02:37:03" (1/1) ... [2021-10-08 14:37:03,678 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.10 02:37:03" (1/1) ... [2021-10-08 14:37:03,680 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.10 02:37:03" (1/1) ... [2021-10-08 14:37:03,683 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-08 14:37:03,684 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-08 14:37:03,684 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-08 14:37:03,684 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-08 14:37:03,685 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.10 02:37:03" (1/1) ... [2021-10-08 14:37:03,693 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-08 14:37:03,706 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-08 14:37:03,722 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-08 14:37:03,754 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-08 14:37:03,798 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-10-08 14:37:03,798 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-10-08 14:37:03,798 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-10-08 14:37:03,798 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-10-08 14:37:03,798 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-08 14:37:03,798 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-08 14:37:03,799 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-08 14:37:03,799 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-10-08 14:37:03,799 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-10-08 14:37:03,799 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-08 14:37:03,799 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-08 14:37:03,799 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-08 14:37:03,799 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-08 14:37:03,801 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-10-08 14:37:04,220 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-08 14:37:04,221 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2021-10-08 14:37:04,227 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.10 02:37:04 BoogieIcfgContainer [2021-10-08 14:37:04,227 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-08 14:37:04,232 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-08 14:37:04,233 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-08 14:37:04,244 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-08 14:37:04,244 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.10 02:37:03" (1/3) ... [2021-10-08 14:37:04,245 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@232652ea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.10 02:37:04, skipping insertion in model container [2021-10-08 14:37:04,245 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.10 02:37:03" (2/3) ... [2021-10-08 14:37:04,246 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@232652ea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.10 02:37:04, skipping insertion in model container [2021-10-08 14:37:04,246 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.10 02:37:04" (3/3) ... [2021-10-08 14:37:04,252 INFO L111 eAbstractionObserver]: Analyzing ICFG parallel-misc-3.wvr.c [2021-10-08 14:37:04,269 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-10-08 14:37:04,270 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-08 14:37:04,270 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-08 14:37:04,270 INFO L516 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-10-08 14:37:04,352 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 14:37:04,353 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 14:37:04,353 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 14:37:04,353 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 14:37:04,354 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 14:37:04,354 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 14:37:04,355 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 14:37:04,356 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 14:37:04,357 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 14:37:04,360 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 14:37:04,361 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 14:37:04,361 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 14:37:04,361 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 14:37:04,362 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 14:37:04,362 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 14:37:04,363 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 14:37:04,364 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 14:37:04,365 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 14:37:04,365 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 14:37:04,365 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 14:37:04,369 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 14:37:04,369 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 14:37:04,370 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 14:37:04,370 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 14:37:04,371 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 14:37:04,371 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 14:37:04,371 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 14:37:04,372 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 14:37:04,381 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 14:37:04,381 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 14:37:04,382 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 14:37:04,382 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 14:37:04,382 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 14:37:04,388 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 14:37:04,389 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 14:37:04,389 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 14:37:04,419 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-10-08 14:37:04,499 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-08 14:37:04,520 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-08 14:37:04,521 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-10-08 14:37:04,551 INFO L118 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-10-08 14:37:04,566 INFO L133 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 85 places, 89 transitions, 194 flow [2021-10-08 14:37:04,570 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 85 places, 89 transitions, 194 flow [2021-10-08 14:37:04,573 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 85 places, 89 transitions, 194 flow [2021-10-08 14:37:04,672 INFO L129 PetriNetUnfolder]: 11/87 cut-off events. [2021-10-08 14:37:04,673 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-10-08 14:37:04,683 INFO L84 FinitePrefix]: Finished finitePrefix Result has 96 conditions, 87 events. 11/87 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 91 event pairs, 0 based on Foata normal form. 0/75 useless extension candidates. Maximal degree in co-relation 48. Up to 4 conditions per place. [2021-10-08 14:37:04,688 INFO L116 LiptonReduction]: Number of co-enabled transitions 1088 [2021-10-08 14:37:08,387 INFO L131 LiptonReduction]: Checked pairs total: 1018 [2021-10-08 14:37:08,388 INFO L133 LiptonReduction]: Total number of compositions: 84 [2021-10-08 14:37:08,403 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 21 places, 16 transitions, 48 flow [2021-10-08 14:37:08,417 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 20 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 14:37:08,419 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 14:37:08,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-08 14:37:08,424 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 14:37:08,425 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 14:37:08,425 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-08 14:37:08,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 14:37:08,431 INFO L82 PathProgramCache]: Analyzing trace with hash -677123789, now seen corresponding path program 1 times [2021-10-08 14:37:08,445 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-08 14:37:08,446 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127692548] [2021-10-08 14:37:08,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 14:37:08,447 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-08 14:37:08,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 14:37:08,660 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 14:37:08,661 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-08 14:37:08,661 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127692548] [2021-10-08 14:37:08,664 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127692548] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-08 14:37:08,664 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-08 14:37:08,665 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-08 14:37:08,667 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524138165] [2021-10-08 14:37:08,673 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-08 14:37:08,674 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-08 14:37:08,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-08 14:37:08,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-08 14:37:08,700 INFO L87 Difference]: Start difference. First operand has 20 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 14:37:08,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 14:37:08,734 INFO L93 Difference]: Finished difference Result 26 states and 54 transitions. [2021-10-08 14:37:08,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-08 14:37:08,737 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-10-08 14:37:08,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 14:37:08,749 INFO L225 Difference]: With dead ends: 26 [2021-10-08 14:37:08,749 INFO L226 Difference]: Without dead ends: 26 [2021-10-08 14:37:08,751 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-08 14:37:08,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-10-08 14:37:08,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2021-10-08 14:37:08,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 14:37:08,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 54 transitions. [2021-10-08 14:37:08,801 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 54 transitions. Word has length 11 [2021-10-08 14:37:08,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 14:37:08,805 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 54 transitions. [2021-10-08 14:37:08,805 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 14:37:08,806 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 54 transitions. [2021-10-08 14:37:08,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-08 14:37:08,807 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 14:37:08,808 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 14:37:08,809 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-08 14:37:08,809 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-08 14:37:08,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 14:37:08,816 INFO L82 PathProgramCache]: Analyzing trace with hash -1250314929, now seen corresponding path program 1 times [2021-10-08 14:37:08,816 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-08 14:37:08,817 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938334068] [2021-10-08 14:37:08,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 14:37:08,817 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-08 14:37:08,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 14:37:08,895 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-08 14:37:08,896 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-08 14:37:08,896 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938334068] [2021-10-08 14:37:08,896 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [938334068] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-08 14:37:08,897 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-08 14:37:08,897 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-08 14:37:08,897 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291191775] [2021-10-08 14:37:08,898 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-08 14:37:08,899 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-08 14:37:08,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-08 14:37:08,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-08 14:37:08,900 INFO L87 Difference]: Start difference. First operand 26 states and 54 transitions. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 14:37:08,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 14:37:08,909 INFO L93 Difference]: Finished difference Result 34 states and 73 transitions. [2021-10-08 14:37:08,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-08 14:37:08,909 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-10-08 14:37:08,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 14:37:08,911 INFO L225 Difference]: With dead ends: 34 [2021-10-08 14:37:08,911 INFO L226 Difference]: Without dead ends: 34 [2021-10-08 14:37:08,912 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-08 14:37:08,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-10-08 14:37:08,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2021-10-08 14:37:08,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 2.212121212121212) internal successors, (73), 33 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 14:37:08,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 73 transitions. [2021-10-08 14:37:08,919 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 73 transitions. Word has length 12 [2021-10-08 14:37:08,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 14:37:08,919 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 73 transitions. [2021-10-08 14:37:08,920 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 14:37:08,920 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 73 transitions. [2021-10-08 14:37:08,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-08 14:37:08,921 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 14:37:08,921 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 14:37:08,922 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-08 14:37:08,922 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-08 14:37:08,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 14:37:08,923 INFO L82 PathProgramCache]: Analyzing trace with hash -866148813, now seen corresponding path program 1 times [2021-10-08 14:37:08,923 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-08 14:37:08,923 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691539553] [2021-10-08 14:37:08,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 14:37:08,924 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-08 14:37:09,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 14:37:09,112 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-08 14:37:09,113 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-08 14:37:09,113 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691539553] [2021-10-08 14:37:09,113 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1691539553] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-08 14:37:09,114 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1935233839] [2021-10-08 14:37:09,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 14:37:09,114 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-08 14:37:09,115 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-08 14:37:09,117 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-08 14:37:09,134 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-08 14:37:09,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 14:37:09,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-08 14:37:09,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 14:37:09,413 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-08 14:37:09,416 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1935233839] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-08 14:37:09,416 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-08 14:37:09,417 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2021-10-08 14:37:09,417 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654898567] [2021-10-08 14:37:09,417 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-08 14:37:09,418 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-08 14:37:09,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-08 14:37:09,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-08 14:37:09,421 INFO L87 Difference]: Start difference. First operand 34 states and 73 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 14:37:09,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 14:37:09,512 INFO L93 Difference]: Finished difference Result 52 states and 116 transitions. [2021-10-08 14:37:09,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-08 14:37:09,513 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-10-08 14:37:09,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 14:37:09,516 INFO L225 Difference]: With dead ends: 52 [2021-10-08 14:37:09,518 INFO L226 Difference]: Without dead ends: 52 [2021-10-08 14:37:09,518 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 55.7ms TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-10-08 14:37:09,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-10-08 14:37:09,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2021-10-08 14:37:09,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 2.2745098039215685) internal successors, (116), 51 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 14:37:09,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 116 transitions. [2021-10-08 14:37:09,536 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 116 transitions. Word has length 13 [2021-10-08 14:37:09,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 14:37:09,537 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 116 transitions. [2021-10-08 14:37:09,537 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 14:37:09,538 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 116 transitions. [2021-10-08 14:37:09,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-08 14:37:09,540 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 14:37:09,541 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 14:37:09,578 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-08 14:37:09,757 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-08 14:37:09,758 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-08 14:37:09,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 14:37:09,760 INFO L82 PathProgramCache]: Analyzing trace with hash -383041135, now seen corresponding path program 2 times [2021-10-08 14:37:09,760 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-08 14:37:09,761 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393366682] [2021-10-08 14:37:09,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 14:37:09,761 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-08 14:37:09,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 14:37:10,151 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 14:37:10,152 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-08 14:37:10,152 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393366682] [2021-10-08 14:37:10,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393366682] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-08 14:37:10,153 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1255875373] [2021-10-08 14:37:10,153 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-08 14:37:10,153 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-08 14:37:10,154 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-08 14:37:10,155 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-08 14:37:10,166 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-08 14:37:10,241 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-08 14:37:10,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-08 14:37:10,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 22 conjunts are in the unsatisfiable core [2021-10-08 14:37:10,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 14:37:10,666 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 14:37:10,666 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1255875373] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-08 14:37:10,667 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-08 14:37:10,667 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-10-08 14:37:10,667 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536399141] [2021-10-08 14:37:10,668 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-08 14:37:10,668 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-08 14:37:10,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-08 14:37:10,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-10-08 14:37:10,669 INFO L87 Difference]: Start difference. First operand 52 states and 116 transitions. Second operand has 13 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 14:37:10,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 14:37:10,791 INFO L93 Difference]: Finished difference Result 99 states and 221 transitions. [2021-10-08 14:37:10,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-08 14:37:10,792 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-10-08 14:37:10,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 14:37:10,794 INFO L225 Difference]: With dead ends: 99 [2021-10-08 14:37:10,794 INFO L226 Difference]: Without dead ends: 94 [2021-10-08 14:37:10,794 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 152.9ms TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-10-08 14:37:10,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-10-08 14:37:10,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 80. [2021-10-08 14:37:10,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 2.3797468354430378) internal successors, (188), 79 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 14:37:10,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 188 transitions. [2021-10-08 14:37:10,807 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 188 transitions. Word has length 15 [2021-10-08 14:37:10,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 14:37:10,807 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 188 transitions. [2021-10-08 14:37:10,808 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 14:37:10,808 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 188 transitions. [2021-10-08 14:37:10,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-08 14:37:10,809 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 14:37:10,809 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 14:37:10,845 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-10-08 14:37:11,022 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-08 14:37:11,022 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-08 14:37:11,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 14:37:11,023 INFO L82 PathProgramCache]: Analyzing trace with hash -20914379, now seen corresponding path program 3 times [2021-10-08 14:37:11,024 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-08 14:37:11,024 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276736899] [2021-10-08 14:37:11,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 14:37:11,024 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-08 14:37:11,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 14:37:11,355 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 14:37:11,355 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-08 14:37:11,356 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276736899] [2021-10-08 14:37:11,357 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [276736899] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-08 14:37:11,361 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [318870908] [2021-10-08 14:37:11,361 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-08 14:37:11,361 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-08 14:37:11,362 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-08 14:37:11,363 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-08 14:37:11,381 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-08 14:37:11,452 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-08 14:37:11,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-08 14:37:11,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 20 conjunts are in the unsatisfiable core [2021-10-08 14:37:11,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 14:37:11,834 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 14:37:11,835 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [318870908] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-08 14:37:11,835 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-08 14:37:11,835 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 10 [2021-10-08 14:37:11,836 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042795559] [2021-10-08 14:37:11,836 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-08 14:37:11,836 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-08 14:37:11,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-08 14:37:11,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-10-08 14:37:11,838 INFO L87 Difference]: Start difference. First operand 80 states and 188 transitions. Second operand has 12 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 14:37:11,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 14:37:11,988 INFO L93 Difference]: Finished difference Result 198 states and 454 transitions. [2021-10-08 14:37:11,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-08 14:37:11,988 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-10-08 14:37:11,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 14:37:11,991 INFO L225 Difference]: With dead ends: 198 [2021-10-08 14:37:11,992 INFO L226 Difference]: Without dead ends: 188 [2021-10-08 14:37:11,992 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 123.8ms TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-10-08 14:37:11,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2021-10-08 14:37:12,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 124. [2021-10-08 14:37:12,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 2.5772357723577235) internal successors, (317), 123 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 14:37:12,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 317 transitions. [2021-10-08 14:37:12,018 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 317 transitions. Word has length 15 [2021-10-08 14:37:12,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 14:37:12,019 INFO L470 AbstractCegarLoop]: Abstraction has 124 states and 317 transitions. [2021-10-08 14:37:12,019 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 14:37:12,019 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 317 transitions. [2021-10-08 14:37:12,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-08 14:37:12,021 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 14:37:12,021 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 14:37:12,054 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-08 14:37:12,234 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-08 14:37:12,234 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-08 14:37:12,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 14:37:12,235 INFO L82 PathProgramCache]: Analyzing trace with hash -1093999759, now seen corresponding path program 4 times [2021-10-08 14:37:12,235 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-08 14:37:12,236 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178621430] [2021-10-08 14:37:12,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 14:37:12,237 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-08 14:37:12,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 14:37:12,671 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 14:37:12,671 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-08 14:37:12,671 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178621430] [2021-10-08 14:37:12,671 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178621430] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-08 14:37:12,672 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1570681264] [2021-10-08 14:37:12,672 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-08 14:37:12,672 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-08 14:37:12,672 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-08 14:37:12,673 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-08 14:37:12,680 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-08 14:37:12,767 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-08 14:37:12,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-08 14:37:12,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 20 conjunts are in the unsatisfiable core [2021-10-08 14:37:12,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 14:37:13,131 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 14:37:13,131 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1570681264] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-08 14:37:13,131 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-08 14:37:13,132 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 10 [2021-10-08 14:37:13,132 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111861877] [2021-10-08 14:37:13,132 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-08 14:37:13,133 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-08 14:37:13,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-08 14:37:13,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-10-08 14:37:13,134 INFO L87 Difference]: Start difference. First operand 124 states and 317 transitions. Second operand has 12 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 14:37:13,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 14:37:13,259 INFO L93 Difference]: Finished difference Result 171 states and 426 transitions. [2021-10-08 14:37:13,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-08 14:37:13,260 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-10-08 14:37:13,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 14:37:13,262 INFO L225 Difference]: With dead ends: 171 [2021-10-08 14:37:13,262 INFO L226 Difference]: Without dead ends: 150 [2021-10-08 14:37:13,262 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 156.2ms TimeCoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-10-08 14:37:13,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-10-08 14:37:13,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 130. [2021-10-08 14:37:13,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 129 states have (on average 2.604651162790698) internal successors, (336), 129 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 14:37:13,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 336 transitions. [2021-10-08 14:37:13,275 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 336 transitions. Word has length 15 [2021-10-08 14:37:13,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 14:37:13,276 INFO L470 AbstractCegarLoop]: Abstraction has 130 states and 336 transitions. [2021-10-08 14:37:13,276 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 14:37:13,276 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 336 transitions. [2021-10-08 14:37:13,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-08 14:37:13,278 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 14:37:13,278 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 14:37:13,314 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-08 14:37:13,493 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-08 14:37:13,493 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-08 14:37:13,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 14:37:13,494 INFO L82 PathProgramCache]: Analyzing trace with hash -1833720335, now seen corresponding path program 5 times [2021-10-08 14:37:13,494 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-08 14:37:13,494 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734633209] [2021-10-08 14:37:13,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 14:37:13,494 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-08 14:37:13,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 14:37:13,737 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 14:37:13,737 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-08 14:37:13,737 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734633209] [2021-10-08 14:37:13,738 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [734633209] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-08 14:37:13,738 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [873794485] [2021-10-08 14:37:13,738 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-08 14:37:13,738 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-08 14:37:13,739 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-08 14:37:13,740 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-08 14:37:13,744 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-08 14:37:13,867 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-08 14:37:13,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-08 14:37:13,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2021-10-08 14:37:13,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 14:37:14,259 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 14:37:14,261 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [873794485] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-08 14:37:14,261 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-08 14:37:14,261 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 11 [2021-10-08 14:37:14,262 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920577800] [2021-10-08 14:37:14,262 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-08 14:37:14,262 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-08 14:37:14,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-08 14:37:14,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-10-08 14:37:14,265 INFO L87 Difference]: Start difference. First operand 130 states and 336 transitions. Second operand has 13 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 14:37:14,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 14:37:14,408 INFO L93 Difference]: Finished difference Result 196 states and 484 transitions. [2021-10-08 14:37:14,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-08 14:37:14,408 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-10-08 14:37:14,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 14:37:14,410 INFO L225 Difference]: With dead ends: 196 [2021-10-08 14:37:14,410 INFO L226 Difference]: Without dead ends: 186 [2021-10-08 14:37:14,411 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 161.8ms TimeCoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-10-08 14:37:14,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2021-10-08 14:37:14,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 140. [2021-10-08 14:37:14,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 139 states have (on average 2.6115107913669067) internal successors, (363), 139 states have internal predecessors, (363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 14:37:14,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 363 transitions. [2021-10-08 14:37:14,423 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 363 transitions. Word has length 15 [2021-10-08 14:37:14,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 14:37:14,423 INFO L470 AbstractCegarLoop]: Abstraction has 140 states and 363 transitions. [2021-10-08 14:37:14,423 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 14:37:14,424 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 363 transitions. [2021-10-08 14:37:14,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-08 14:37:14,425 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 14:37:14,425 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 14:37:14,464 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-10-08 14:37:14,638 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-08 14:37:14,639 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-08 14:37:14,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 14:37:14,640 INFO L82 PathProgramCache]: Analyzing trace with hash 1011509771, now seen corresponding path program 6 times [2021-10-08 14:37:14,640 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-08 14:37:14,641 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333037309] [2021-10-08 14:37:14,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 14:37:14,641 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-08 14:37:14,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 14:37:14,844 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-08 14:37:14,844 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-08 14:37:14,845 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333037309] [2021-10-08 14:37:14,845 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333037309] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-08 14:37:14,847 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [79377598] [2021-10-08 14:37:14,847 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-08 14:37:14,847 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-08 14:37:14,847 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-08 14:37:14,850 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-08 14:37:14,859 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-10-08 14:37:14,987 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-10-08 14:37:14,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-08 14:37:14,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-08 14:37:14,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 14:37:15,149 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-08 14:37:15,150 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [79377598] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-08 14:37:15,150 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-08 14:37:15,150 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-10-08 14:37:15,150 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473657179] [2021-10-08 14:37:15,151 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-08 14:37:15,151 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-08 14:37:15,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-08 14:37:15,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-10-08 14:37:15,152 INFO L87 Difference]: Start difference. First operand 140 states and 363 transitions. Second operand has 10 states, 10 states have (on average 2.8) internal successors, (28), 9 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 14:37:15,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 14:37:15,204 INFO L93 Difference]: Finished difference Result 156 states and 380 transitions. [2021-10-08 14:37:15,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-08 14:37:15,205 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 9 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-10-08 14:37:15,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 14:37:15,206 INFO L225 Difference]: With dead ends: 156 [2021-10-08 14:37:15,206 INFO L226 Difference]: Without dead ends: 138 [2021-10-08 14:37:15,207 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 85.8ms TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-10-08 14:37:15,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-10-08 14:37:15,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 108. [2021-10-08 14:37:15,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 2.514018691588785) internal successors, (269), 107 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 14:37:15,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 269 transitions. [2021-10-08 14:37:15,215 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 269 transitions. Word has length 16 [2021-10-08 14:37:15,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 14:37:15,221 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 269 transitions. [2021-10-08 14:37:15,221 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 9 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 14:37:15,222 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 269 transitions. [2021-10-08 14:37:15,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-08 14:37:15,223 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 14:37:15,223 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 14:37:15,258 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-10-08 14:37:15,438 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-08 14:37:15,439 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-08 14:37:15,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 14:37:15,440 INFO L82 PathProgramCache]: Analyzing trace with hash -254435671, now seen corresponding path program 7 times [2021-10-08 14:37:15,440 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-08 14:37:15,441 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35468708] [2021-10-08 14:37:15,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 14:37:15,441 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-08 14:37:15,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 14:37:15,561 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-08 14:37:15,561 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-08 14:37:15,561 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35468708] [2021-10-08 14:37:15,561 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [35468708] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-08 14:37:15,561 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1411921880] [2021-10-08 14:37:15,562 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-08 14:37:15,562 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-08 14:37:15,562 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-08 14:37:15,563 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-08 14:37:15,585 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-10-08 14:37:15,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 14:37:15,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-08 14:37:15,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 14:37:15,891 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-08 14:37:15,891 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1411921880] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-08 14:37:15,891 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-08 14:37:15,891 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2021-10-08 14:37:15,892 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308954827] [2021-10-08 14:37:15,892 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-08 14:37:15,892 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-08 14:37:15,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-08 14:37:15,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-10-08 14:37:15,893 INFO L87 Difference]: Start difference. First operand 108 states and 269 transitions. Second operand has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 14:37:15,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 14:37:15,999 INFO L93 Difference]: Finished difference Result 122 states and 288 transitions. [2021-10-08 14:37:16,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-08 14:37:16,000 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-10-08 14:37:16,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 14:37:16,001 INFO L225 Difference]: With dead ends: 122 [2021-10-08 14:37:16,002 INFO L226 Difference]: Without dead ends: 116 [2021-10-08 14:37:16,002 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 102.3ms TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-10-08 14:37:16,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-10-08 14:37:16,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 86. [2021-10-08 14:37:16,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 2.3411764705882354) internal successors, (199), 85 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 14:37:16,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 199 transitions. [2021-10-08 14:37:16,008 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 199 transitions. Word has length 16 [2021-10-08 14:37:16,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 14:37:16,009 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 199 transitions. [2021-10-08 14:37:16,009 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 14:37:16,009 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 199 transitions. [2021-10-08 14:37:16,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-08 14:37:16,010 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 14:37:16,010 INFO L512 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 14:37:16,054 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-10-08 14:37:16,222 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-08 14:37:16,223 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-08 14:37:16,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 14:37:16,224 INFO L82 PathProgramCache]: Analyzing trace with hash -1273592207, now seen corresponding path program 8 times [2021-10-08 14:37:16,224 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-08 14:37:16,224 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062812111] [2021-10-08 14:37:16,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 14:37:16,225 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-08 14:37:16,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 14:37:16,529 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 14:37:16,529 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-08 14:37:16,529 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062812111] [2021-10-08 14:37:16,529 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062812111] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-08 14:37:16,529 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [552172268] [2021-10-08 14:37:16,530 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-08 14:37:16,530 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-08 14:37:16,530 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-08 14:37:16,531 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-08 14:37:16,553 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-10-08 14:37:16,696 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-08 14:37:16,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-08 14:37:16,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 22 conjunts are in the unsatisfiable core [2021-10-08 14:37:16,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 14:37:17,083 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 14:37:17,084 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [552172268] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-08 14:37:17,084 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-08 14:37:17,090 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 12 [2021-10-08 14:37:17,090 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089905926] [2021-10-08 14:37:17,091 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-08 14:37:17,091 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-08 14:37:17,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-08 14:37:17,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-10-08 14:37:17,092 INFO L87 Difference]: Start difference. First operand 86 states and 199 transitions. Second operand has 14 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 13 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 14:37:17,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 14:37:17,263 INFO L93 Difference]: Finished difference Result 140 states and 327 transitions. [2021-10-08 14:37:17,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-08 14:37:17,264 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 13 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-10-08 14:37:17,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 14:37:17,264 INFO L225 Difference]: With dead ends: 140 [2021-10-08 14:37:17,264 INFO L226 Difference]: Without dead ends: 0 [2021-10-08 14:37:17,265 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 199.6ms TimeCoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-10-08 14:37:17,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-08 14:37:17,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-08 14:37:17,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 14:37:17,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-08 14:37:17,265 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 17 [2021-10-08 14:37:17,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 14:37:17,266 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-08 14:37:17,266 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 13 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 14:37:17,266 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-08 14:37:17,266 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-08 14:37:17,269 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-08 14:37:17,269 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATION [2021-10-08 14:37:17,270 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATION [2021-10-08 14:37:17,308 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-10-08 14:37:17,483 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-10-08 14:37:17,490 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-10-08 14:37:17,490 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-08 14:37:17,492 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 08.10 02:37:17 BasicIcfg [2021-10-08 14:37:17,492 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-08 14:37:17,492 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-08 14:37:17,492 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-08 14:37:17,493 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-08 14:37:17,493 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.10 02:37:04" (3/4) ... [2021-10-08 14:37:17,496 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-08 14:37:17,503 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure thread1 [2021-10-08 14:37:17,503 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure thread2 [2021-10-08 14:37:17,508 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 13 nodes and edges [2021-10-08 14:37:17,508 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-10-08 14:37:17,508 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-08 14:37:17,508 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-08 14:37:17,545 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-10-08 14:37:17,545 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-08 14:37:17,547 INFO L168 Benchmark]: Toolchain (without parser) took 14305.38 ms. Allocated memory was 50.3 MB in the beginning and 92.3 MB in the end (delta: 41.9 MB). Free memory was 26.9 MB in the beginning and 55.4 MB in the end (delta: -28.5 MB). Peak memory consumption was 16.5 MB. Max. memory is 16.1 GB. [2021-10-08 14:37:17,548 INFO L168 Benchmark]: CDTParser took 0.31 ms. Allocated memory is still 41.9 MB. Free memory is still 27.7 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-08 14:37:17,548 INFO L168 Benchmark]: CACSL2BoogieTranslator took 358.94 ms. Allocated memory is still 50.3 MB. Free memory was 26.4 MB in the beginning and 27.2 MB in the end (delta: -789.0 kB). Peak memory consumption was 5.6 MB. Max. memory is 16.1 GB. [2021-10-08 14:37:17,549 INFO L168 Benchmark]: Boogie Procedure Inliner took 40.20 ms. Allocated memory is still 50.3 MB. Free memory was 27.2 MB in the beginning and 25.6 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-08 14:37:17,549 INFO L168 Benchmark]: Boogie Preprocessor took 28.76 ms. Allocated memory is still 50.3 MB. Free memory was 25.6 MB in the beginning and 24.5 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-08 14:37:17,549 INFO L168 Benchmark]: RCFGBuilder took 543.26 ms. Allocated memory is still 50.3 MB. Free memory was 24.5 MB in the beginning and 24.1 MB in the end (delta: 392.6 kB). Peak memory consumption was 2.9 MB. Max. memory is 16.1 GB. [2021-10-08 14:37:17,550 INFO L168 Benchmark]: TraceAbstraction took 13259.53 ms. Allocated memory was 50.3 MB in the beginning and 92.3 MB in the end (delta: 41.9 MB). Free memory was 23.5 MB in the beginning and 58.6 MB in the end (delta: -35.1 MB). Peak memory consumption was 5.9 MB. Max. memory is 16.1 GB. [2021-10-08 14:37:17,551 INFO L168 Benchmark]: Witness Printer took 53.12 ms. Allocated memory is still 92.3 MB. Free memory was 58.6 MB in the beginning and 55.4 MB in the end (delta: 3.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-08 14:37:17,553 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31 ms. Allocated memory is still 41.9 MB. Free memory is still 27.7 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 358.94 ms. Allocated memory is still 50.3 MB. Free memory was 26.4 MB in the beginning and 27.2 MB in the end (delta: -789.0 kB). Peak memory consumption was 5.6 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 40.20 ms. Allocated memory is still 50.3 MB. Free memory was 27.2 MB in the beginning and 25.6 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 28.76 ms. Allocated memory is still 50.3 MB. Free memory was 25.6 MB in the beginning and 24.5 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 543.26 ms. Allocated memory is still 50.3 MB. Free memory was 24.5 MB in the beginning and 24.1 MB in the end (delta: 392.6 kB). Peak memory consumption was 2.9 MB. Max. memory is 16.1 GB. * TraceAbstraction took 13259.53 ms. Allocated memory was 50.3 MB in the beginning and 92.3 MB in the end (delta: 41.9 MB). Free memory was 23.5 MB in the beginning and 58.6 MB in the end (delta: -35.1 MB). Peak memory consumption was 5.9 MB. Max. memory is 16.1 GB. * Witness Printer took 53.12 ms. Allocated memory is still 92.3 MB. Free memory was 58.6 MB in the beginning and 55.4 MB in the end (delta: 3.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 3817.7ms, 85 PlacesBefore, 21 PlacesAfterwards, 89 TransitionsBefore, 16 TransitionsAfterwards, 1088 CoEnabledTransitionPairs, 6 FixpointIterations, 38 TrivialSequentialCompositions, 31 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 6 ConcurrentYvCompositions, 9 ChoiceCompositions, 84 TotalNumberOfCompositions, 1018 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 1018, positive: 1018, positive conditional: 0, positive unconditional: 1018, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 776, positive: 776, positive conditional: 0, positive unconditional: 776, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 776, positive: 766, positive conditional: 0, positive unconditional: 766, negative: 10, negative conditional: 0, negative unconditional: 10, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 10, positive: 10, positive conditional: 0, positive unconditional: 10, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 50, positive: 50, positive conditional: 0, positive unconditional: 50, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 1018, positive: 242, positive conditional: 0, positive unconditional: 242, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 776, unknown conditional: 0, unknown unconditional: 776] , Statistics on independence cache: Total cache size (in pairs): 18, Positive cache size: 18, Positive conditional cache size: 0, Positive unconditional cache size: 18, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0 - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 97]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 107 locations, 3 error locations. Started 1 CEGAR loops. OverallTime: 12994.8ms, OverallIterations: 10, TraceHistogramMax: 4, EmptinessCheckTime: 19.8ms, AutomataDifference: 1088.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 3896.3ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 183 SDtfs, 404 SDslu, 728 SDs, 0 SdLazy, 471 SolverSat, 86 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 561.0ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 174 GetRequests, 78 SyntacticMatches, 6 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 1045.7ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=140occurred in iteration=7, InterpolantAutomatonStates: 82, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 136.2ms AutomataMinimizationTime, 10 MinimizatonAttempts, 204 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 99.4ms SsaConstructionTime, 887.8ms SatisfiabilityAnalysisTime, 4173.1ms InterpolantComputationTime, 267 NumberOfCodeBlocks, 267 NumberOfCodeBlocksAsserted, 25 NumberOfCheckSat, 249 ConstructedInterpolants, 0 QuantifiedInterpolants, 2874 SizeOfPredicates, 27 NumberOfNonLiveVariables, 820 ConjunctsInSsa, 140 ConjunctsInUnsatCore, 18 InterpolantComputations, 2 PerfectInterpolantSequences, 16/115 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 - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-10-08 14:37:17,592 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...