./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/popl20-bad/threaded-sum-2.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/popl20-bad/threaded-sum-2.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 f75773f59645b0ea2511bc9dd2c8c004c487e1dc ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-8c2bbc9 [2021-10-05 21:50:37,640 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-05 21:50:37,644 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-05 21:50:37,699 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-05 21:50:37,700 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-05 21:50:37,705 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-05 21:50:37,707 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-05 21:50:37,711 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-05 21:50:37,718 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-05 21:50:37,724 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-05 21:50:37,726 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-05 21:50:37,728 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-05 21:50:37,728 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-05 21:50:37,731 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-05 21:50:37,735 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-05 21:50:37,739 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-05 21:50:37,741 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-05 21:50:37,742 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-05 21:50:37,745 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-05 21:50:37,752 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-05 21:50:37,754 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-05 21:50:37,756 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-05 21:50:37,757 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-05 21:50:37,758 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-05 21:50:37,761 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-05 21:50:37,762 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-05 21:50:37,762 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-05 21:50:37,763 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-05 21:50:37,764 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-05 21:50:37,765 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-05 21:50:37,765 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-05 21:50:37,766 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-05 21:50:37,767 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-05 21:50:37,768 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-05 21:50:37,769 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-05 21:50:37,769 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-05 21:50:37,770 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-05 21:50:37,771 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-05 21:50:37,771 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-05 21:50:37,772 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-05 21:50:37,773 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-05 21:50:37,774 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-05 21:50:37,802 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-05 21:50:37,802 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-05 21:50:37,802 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-05 21:50:37,803 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-05 21:50:37,804 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-05 21:50:37,804 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-05 21:50:37,805 INFO L138 SettingsManager]: * Use SBE=true [2021-10-05 21:50:37,805 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-05 21:50:37,805 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-05 21:50:37,806 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-05 21:50:37,806 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-05 21:50:37,806 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-05 21:50:37,806 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-05 21:50:37,807 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-05 21:50:37,807 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-05 21:50:37,807 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-05 21:50:37,807 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-05 21:50:37,808 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-05 21:50:37,808 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-05 21:50:37,808 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-05 21:50:37,809 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-05 21:50:37,809 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-05 21:50:37,809 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-05 21:50:37,810 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-05 21:50:37,810 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-05 21:50:37,810 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-05 21:50:37,810 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-05 21:50:37,811 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-05 21:50:37,811 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-05 21:50:37,811 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-05 21:50:37,811 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f75773f59645b0ea2511bc9dd2c8c004c487e1dc [2021-10-05 21:50:38,206 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-05 21:50:38,230 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-05 21:50:38,233 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-05 21:50:38,235 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-05 21:50:38,235 INFO L275 PluginConnector]: CDTParser initialized [2021-10-05 21:50:38,236 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-bad/threaded-sum-2.wvr.c [2021-10-05 21:50:38,313 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a6ab04c9b/7657acd5ddad4a7597ac175f533f36c4/FLAG053bad662 [2021-10-05 21:50:38,921 INFO L306 CDTParser]: Found 1 translation units. [2021-10-05 21:50:38,922 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/releaseScripts/default/sv-benchmarks/c/weaver/popl20-bad/threaded-sum-2.wvr.c [2021-10-05 21:50:38,936 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a6ab04c9b/7657acd5ddad4a7597ac175f533f36c4/FLAG053bad662 [2021-10-05 21:50:39,286 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a6ab04c9b/7657acd5ddad4a7597ac175f533f36c4 [2021-10-05 21:50:39,291 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-05 21:50:39,300 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-05 21:50:39,305 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-05 21:50:39,306 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-05 21:50:39,311 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-05 21:50:39,312 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.10 09:50:39" (1/1) ... [2021-10-05 21:50:39,314 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1f50d336 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 09:50:39, skipping insertion in model container [2021-10-05 21:50:39,315 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.10 09:50:39" (1/1) ... [2021-10-05 21:50:39,324 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-05 21:50:39,359 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-05 21:50:39,595 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/popl20-bad/threaded-sum-2.wvr.c[2084,2097] [2021-10-05 21:50:39,600 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-05 21:50:39,610 INFO L203 MainTranslator]: Completed pre-run [2021-10-05 21:50:39,632 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/popl20-bad/threaded-sum-2.wvr.c[2084,2097] [2021-10-05 21:50:39,633 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-05 21:50:39,650 INFO L208 MainTranslator]: Completed translation [2021-10-05 21:50:39,651 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 09:50:39 WrapperNode [2021-10-05 21:50:39,651 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-05 21:50:39,653 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-05 21:50:39,653 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-05 21:50:39,653 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-05 21:50:39,663 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 09:50:39" (1/1) ... [2021-10-05 21:50:39,673 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 09:50:39" (1/1) ... [2021-10-05 21:50:39,707 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-05 21:50:39,709 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-05 21:50:39,709 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-05 21:50:39,709 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-05 21:50:39,720 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 09:50:39" (1/1) ... [2021-10-05 21:50:39,720 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 09:50:39" (1/1) ... [2021-10-05 21:50:39,734 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 09:50:39" (1/1) ... [2021-10-05 21:50:39,735 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 09:50:39" (1/1) ... [2021-10-05 21:50:39,748 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 09:50:39" (1/1) ... [2021-10-05 21:50:39,760 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 09:50:39" (1/1) ... [2021-10-05 21:50:39,763 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 09:50:39" (1/1) ... [2021-10-05 21:50:39,771 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-05 21:50:39,775 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-05 21:50:39,776 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-05 21:50:39,777 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-05 21:50:39,778 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 09:50:39" (1/1) ... [2021-10-05 21:50:39,789 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-05 21:50:39,807 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 21:50:39,837 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) [2021-10-05 21:50:39,861 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 [2021-10-05 21:50:39,914 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-10-05 21:50:39,914 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-10-05 21:50:39,917 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-10-05 21:50:39,917 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-10-05 21:50:39,918 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-05 21:50:39,918 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-05 21:50:39,918 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-05 21:50:39,918 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-10-05 21:50:39,918 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-10-05 21:50:39,919 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-05 21:50:39,919 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-05 21:50:39,919 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-05 21:50:39,919 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-05 21:50:39,921 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-10-05 21:50:40,392 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-05 21:50:40,393 INFO L299 CfgBuilder]: Removed 10 assume(true) statements. [2021-10-05 21:50:40,395 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.10 09:50:40 BoogieIcfgContainer [2021-10-05 21:50:40,396 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-05 21:50:40,398 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-05 21:50:40,398 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-05 21:50:40,402 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-05 21:50:40,403 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.10 09:50:39" (1/3) ... [2021-10-05 21:50:40,404 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@322a0a42 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.10 09:50:40, skipping insertion in model container [2021-10-05 21:50:40,404 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 09:50:39" (2/3) ... [2021-10-05 21:50:40,405 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@322a0a42 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.10 09:50:40, skipping insertion in model container [2021-10-05 21:50:40,405 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.10 09:50:40" (3/3) ... [2021-10-05 21:50:40,407 INFO L111 eAbstractionObserver]: Analyzing ICFG threaded-sum-2.wvr.c [2021-10-05 21:50:40,414 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-10-05 21:50:40,415 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-05 21:50:40,415 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-05 21:50:40,415 INFO L516 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-10-05 21:50:40,451 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:50:40,451 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:50:40,452 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:50:40,452 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:50:40,453 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:50:40,453 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:50:40,454 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:50:40,454 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:50:40,458 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:50:40,459 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:50:40,459 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:50:40,459 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:50:40,462 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:50:40,463 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:50:40,463 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:50:40,463 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:50:40,472 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-10-05 21:50:40,526 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-05 21:50:40,535 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 [2021-10-05 21:50:40,536 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-10-05 21:50:40,554 INFO L118 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-10-05 21:50:40,568 INFO L133 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 75 places, 75 transitions, 166 flow [2021-10-05 21:50:40,572 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 75 places, 75 transitions, 166 flow [2021-10-05 21:50:40,575 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 75 places, 75 transitions, 166 flow [2021-10-05 21:50:40,628 INFO L129 PetriNetUnfolder]: 7/73 cut-off events. [2021-10-05 21:50:40,628 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-10-05 21:50:40,633 INFO L84 FinitePrefix]: Finished finitePrefix Result has 82 conditions, 73 events. 7/73 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 33 event pairs, 0 based on Foata normal form. 0/65 useless extension candidates. Maximal degree in co-relation 47. Up to 3 conditions per place. [2021-10-05 21:50:40,636 INFO L116 LiptonReduction]: Number of co-enabled transitions 282 [2021-10-05 21:50:43,800 INFO L131 LiptonReduction]: Checked pairs total: 646 [2021-10-05 21:50:43,800 INFO L133 LiptonReduction]: Total number of compositions: 64 [2021-10-05 21:50:43,809 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 23 places, 19 transitions, 54 flow [2021-10-05 21:50:43,822 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 34 states, 33 states have (on average 2.4545454545454546) internal successors, (81), 33 states have internal predecessors, (81), 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) [2021-10-05 21:50:43,825 INFO L276 IsEmpty]: Start isEmpty. Operand has 34 states, 33 states have (on average 2.4545454545454546) internal successors, (81), 33 states have internal predecessors, (81), 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) [2021-10-05 21:50:43,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-05 21:50:43,833 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 21:50:43,833 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 21:50:43,834 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-05 21:50:43,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 21:50:43,840 INFO L82 PathProgramCache]: Analyzing trace with hash 410130097, now seen corresponding path program 1 times [2021-10-05 21:50:43,851 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 21:50:43,851 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844681795] [2021-10-05 21:50:43,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 21:50:43,853 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 21:50:44,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 21:50:44,086 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 21:50:44,087 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 21:50:44,088 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844681795] [2021-10-05 21:50:44,089 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1844681795] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-05 21:50:44,089 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-05 21:50:44,089 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-05 21:50:44,091 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258987077] [2021-10-05 21:50:44,098 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-05 21:50:44,099 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 21:50:44,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-05 21:50:44,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-05 21:50:44,126 INFO L87 Difference]: Start difference. First operand has 34 states, 33 states have (on average 2.4545454545454546) internal successors, (81), 33 states have internal predecessors, (81), 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) [2021-10-05 21:50:44,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 21:50:44,159 INFO L93 Difference]: Finished difference Result 40 states and 95 transitions. [2021-10-05 21:50:44,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-05 21:50:44,161 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 [2021-10-05 21:50:44,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 21:50:44,172 INFO L225 Difference]: With dead ends: 40 [2021-10-05 21:50:44,172 INFO L226 Difference]: Without dead ends: 36 [2021-10-05 21:50:44,174 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-05 21:50:44,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-10-05 21:50:44,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2021-10-05 21:50:44,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 2.4285714285714284) internal successors, (85), 35 states have internal predecessors, (85), 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) [2021-10-05 21:50:44,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 85 transitions. [2021-10-05 21:50:44,214 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 85 transitions. Word has length 11 [2021-10-05 21:50:44,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 21:50:44,214 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 85 transitions. [2021-10-05 21:50:44,215 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) [2021-10-05 21:50:44,215 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 85 transitions. [2021-10-05 21:50:44,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-05 21:50:44,216 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 21:50:44,217 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 21:50:44,217 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-05 21:50:44,217 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-05 21:50:44,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 21:50:44,218 INFO L82 PathProgramCache]: Analyzing trace with hash -72716943, now seen corresponding path program 1 times [2021-10-05 21:50:44,219 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 21:50:44,219 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75631965] [2021-10-05 21:50:44,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 21:50:44,220 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 21:50:44,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 21:50:44,301 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 21:50:44,301 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 21:50:44,302 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75631965] [2021-10-05 21:50:44,302 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75631965] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-05 21:50:44,302 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-05 21:50:44,302 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-05 21:50:44,303 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645225077] [2021-10-05 21:50:44,304 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-05 21:50:44,305 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 21:50:44,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-05 21:50:44,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-05 21:50:44,310 INFO L87 Difference]: Start difference. First operand 36 states and 85 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 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) [2021-10-05 21:50:44,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 21:50:44,344 INFO L93 Difference]: Finished difference Result 68 states and 163 transitions. [2021-10-05 21:50:44,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-05 21:50:44,350 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 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 [2021-10-05 21:50:44,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 21:50:44,352 INFO L225 Difference]: With dead ends: 68 [2021-10-05 21:50:44,353 INFO L226 Difference]: Without dead ends: 68 [2021-10-05 21:50:44,354 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.1ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-05 21:50:44,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-10-05 21:50:44,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 66. [2021-10-05 21:50:44,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 2.4615384615384617) internal successors, (160), 65 states have internal predecessors, (160), 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) [2021-10-05 21:50:44,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 160 transitions. [2021-10-05 21:50:44,366 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 160 transitions. Word has length 13 [2021-10-05 21:50:44,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 21:50:44,367 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 160 transitions. [2021-10-05 21:50:44,367 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 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) [2021-10-05 21:50:44,368 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 160 transitions. [2021-10-05 21:50:44,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-05 21:50:44,369 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 21:50:44,370 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 21:50:44,370 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-05 21:50:44,370 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-05 21:50:44,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 21:50:44,371 INFO L82 PathProgramCache]: Analyzing trace with hash 1789320424, now seen corresponding path program 1 times [2021-10-05 21:50:44,371 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 21:50:44,372 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144781027] [2021-10-05 21:50:44,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 21:50:44,372 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 21:50:44,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 21:50:44,444 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 21:50:44,445 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 21:50:44,445 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144781027] [2021-10-05 21:50:44,445 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144781027] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-05 21:50:44,446 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-05 21:50:44,446 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-05 21:50:44,446 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925814998] [2021-10-05 21:50:44,447 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-05 21:50:44,447 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 21:50:44,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-05 21:50:44,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-05 21:50:44,449 INFO L87 Difference]: Start difference. First operand 66 states and 160 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 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) [2021-10-05 21:50:44,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 21:50:44,468 INFO L93 Difference]: Finished difference Result 88 states and 206 transitions. [2021-10-05 21:50:44,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-05 21:50:44,468 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 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 [2021-10-05 21:50:44,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 21:50:44,470 INFO L225 Difference]: With dead ends: 88 [2021-10-05 21:50:44,471 INFO L226 Difference]: Without dead ends: 88 [2021-10-05 21:50:44,471 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.8ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-05 21:50:44,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-10-05 21:50:44,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 70. [2021-10-05 21:50:44,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 2.4927536231884058) internal successors, (172), 69 states have internal predecessors, (172), 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) [2021-10-05 21:50:44,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 172 transitions. [2021-10-05 21:50:44,483 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 172 transitions. Word has length 15 [2021-10-05 21:50:44,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 21:50:44,484 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 172 transitions. [2021-10-05 21:50:44,485 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 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) [2021-10-05 21:50:44,485 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 172 transitions. [2021-10-05 21:50:44,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-05 21:50:44,487 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 21:50:44,487 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 21:50:44,487 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-05 21:50:44,487 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-05 21:50:44,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 21:50:44,488 INFO L82 PathProgramCache]: Analyzing trace with hash 771424305, now seen corresponding path program 2 times [2021-10-05 21:50:44,489 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 21:50:44,489 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318151224] [2021-10-05 21:50:44,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 21:50:44,490 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 21:50:44,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 21:50:44,811 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 21:50:44,812 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 21:50:44,813 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318151224] [2021-10-05 21:50:44,813 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1318151224] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:50:44,815 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2127712868] [2021-10-05 21:50:44,816 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-05 21:50:44,816 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 21:50:44,816 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 21:50:44,823 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) [2021-10-05 21:50:44,847 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 [2021-10-05 21:50:44,903 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-05 21:50:44,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-05 21:50:44,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 23 conjunts are in the unsatisfiable core [2021-10-05 21:50:44,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 21:50:45,460 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 21:50:45,460 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2127712868] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:50:45,461 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 21:50:45,461 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2021-10-05 21:50:45,461 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266273712] [2021-10-05 21:50:45,462 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-05 21:50:45,462 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 21:50:45,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-05 21:50:45,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-10-05 21:50:45,464 INFO L87 Difference]: Start difference. First operand 70 states and 172 transitions. Second operand has 14 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 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) [2021-10-05 21:50:46,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 21:50:46,088 INFO L93 Difference]: Finished difference Result 202 states and 510 transitions. [2021-10-05 21:50:46,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-05 21:50:46,089 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 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 [2021-10-05 21:50:46,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 21:50:46,092 INFO L225 Difference]: With dead ends: 202 [2021-10-05 21:50:46,092 INFO L226 Difference]: Without dead ends: 180 [2021-10-05 21:50:46,093 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 488.8ms TimeCoverageRelationStatistics Valid=115, Invalid=391, Unknown=0, NotChecked=0, Total=506 [2021-10-05 21:50:46,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2021-10-05 21:50:46,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 104. [2021-10-05 21:50:46,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 2.6893203883495147) internal successors, (277), 103 states have internal predecessors, (277), 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) [2021-10-05 21:50:46,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 277 transitions. [2021-10-05 21:50:46,110 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 277 transitions. Word has length 17 [2021-10-05 21:50:46,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 21:50:46,110 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 277 transitions. [2021-10-05 21:50:46,111 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 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) [2021-10-05 21:50:46,111 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 277 transitions. [2021-10-05 21:50:46,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-05 21:50:46,113 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 21:50:46,113 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 21:50:46,160 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 [2021-10-05 21:50:46,327 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 21:50:46,328 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-05 21:50:46,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 21:50:46,328 INFO L82 PathProgramCache]: Analyzing trace with hash -746477225, now seen corresponding path program 3 times [2021-10-05 21:50:46,328 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 21:50:46,329 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94868158] [2021-10-05 21:50:46,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 21:50:46,330 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 21:50:46,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 21:50:46,628 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 21:50:46,629 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 21:50:46,629 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94868158] [2021-10-05 21:50:46,630 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94868158] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:50:46,630 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1196835418] [2021-10-05 21:50:46,630 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-05 21:50:46,631 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 21:50:46,631 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 21:50:46,632 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) [2021-10-05 21:50:46,657 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 [2021-10-05 21:50:46,721 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-10-05 21:50:46,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-05 21:50:46,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 23 conjunts are in the unsatisfiable core [2021-10-05 21:50:46,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 21:50:47,102 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 21:50:47,103 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1196835418] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:50:47,103 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 21:50:47,104 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 13 [2021-10-05 21:50:47,104 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961846879] [2021-10-05 21:50:47,105 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-05 21:50:47,105 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 21:50:47,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-05 21:50:47,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-10-05 21:50:47,106 INFO L87 Difference]: Start difference. First operand 104 states and 277 transitions. Second operand has 15 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 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) [2021-10-05 21:50:47,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 21:50:47,799 INFO L93 Difference]: Finished difference Result 274 states and 722 transitions. [2021-10-05 21:50:47,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-10-05 21:50:47,803 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 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 [2021-10-05 21:50:47,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 21:50:47,806 INFO L225 Difference]: With dead ends: 274 [2021-10-05 21:50:47,806 INFO L226 Difference]: Without dead ends: 252 [2021-10-05 21:50:47,807 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 535.6ms TimeCoverageRelationStatistics Valid=124, Invalid=526, Unknown=0, NotChecked=0, Total=650 [2021-10-05 21:50:47,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2021-10-05 21:50:47,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 112. [2021-10-05 21:50:47,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 2.7117117117117115) internal successors, (301), 111 states have internal predecessors, (301), 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) [2021-10-05 21:50:47,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 301 transitions. [2021-10-05 21:50:47,824 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 301 transitions. Word has length 17 [2021-10-05 21:50:47,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 21:50:47,825 INFO L470 AbstractCegarLoop]: Abstraction has 112 states and 301 transitions. [2021-10-05 21:50:47,825 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 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) [2021-10-05 21:50:47,825 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 301 transitions. [2021-10-05 21:50:47,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-05 21:50:47,827 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 21:50:47,827 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 21:50:47,855 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-05 21:50:48,040 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 21:50:48,041 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-05 21:50:48,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 21:50:48,043 INFO L82 PathProgramCache]: Analyzing trace with hash 1109449073, now seen corresponding path program 4 times [2021-10-05 21:50:48,044 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 21:50:48,044 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110106713] [2021-10-05 21:50:48,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 21:50:48,044 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 21:50:48,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 21:50:48,237 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 21:50:48,238 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 21:50:48,238 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110106713] [2021-10-05 21:50:48,238 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2110106713] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:50:48,239 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1120189619] [2021-10-05 21:50:48,239 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-05 21:50:48,239 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 21:50:48,240 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 21:50:48,241 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) [2021-10-05 21:50:48,258 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 [2021-10-05 21:50:48,330 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-05 21:50:48,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-05 21:50:48,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 25 conjunts are in the unsatisfiable core [2021-10-05 21:50:48,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 21:50:48,608 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 21:50:48,609 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1120189619] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:50:48,609 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 21:50:48,610 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2021-10-05 21:50:48,610 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293452861] [2021-10-05 21:50:48,610 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-05 21:50:48,611 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 21:50:48,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-05 21:50:48,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-10-05 21:50:48,612 INFO L87 Difference]: Start difference. First operand 112 states and 301 transitions. Second operand has 14 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 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) [2021-10-05 21:50:48,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 21:50:48,982 INFO L93 Difference]: Finished difference Result 235 states and 601 transitions. [2021-10-05 21:50:48,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-05 21:50:48,983 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 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 [2021-10-05 21:50:48,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 21:50:48,986 INFO L225 Difference]: With dead ends: 235 [2021-10-05 21:50:48,986 INFO L226 Difference]: Without dead ends: 196 [2021-10-05 21:50:48,986 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 313.1ms TimeCoverageRelationStatistics Valid=101, Invalid=405, Unknown=0, NotChecked=0, Total=506 [2021-10-05 21:50:48,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2021-10-05 21:50:48,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 132. [2021-10-05 21:50:49,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 131 states have (on average 2.7251908396946565) internal successors, (357), 131 states have internal predecessors, (357), 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) [2021-10-05 21:50:49,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 357 transitions. [2021-10-05 21:50:49,002 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 357 transitions. Word has length 17 [2021-10-05 21:50:49,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 21:50:49,002 INFO L470 AbstractCegarLoop]: Abstraction has 132 states and 357 transitions. [2021-10-05 21:50:49,003 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 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) [2021-10-05 21:50:49,003 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 357 transitions. [2021-10-05 21:50:49,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-05 21:50:49,005 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 21:50:49,005 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 21:50:49,053 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 [2021-10-05 21:50:49,219 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 21:50:49,220 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-05 21:50:49,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 21:50:49,221 INFO L82 PathProgramCache]: Analyzing trace with hash -408452457, now seen corresponding path program 5 times [2021-10-05 21:50:49,222 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 21:50:49,222 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567718841] [2021-10-05 21:50:49,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 21:50:49,223 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 21:50:49,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 21:50:49,371 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 21:50:49,372 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 21:50:49,372 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567718841] [2021-10-05 21:50:49,372 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [567718841] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:50:49,373 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1244645753] [2021-10-05 21:50:49,373 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-05 21:50:49,373 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 21:50:49,373 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 21:50:49,374 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) [2021-10-05 21:50:49,387 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 [2021-10-05 21:50:49,478 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-10-05 21:50:49,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-05 21:50:49,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 25 conjunts are in the unsatisfiable core [2021-10-05 21:50:49,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 21:50:49,810 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 21:50:49,812 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1244645753] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:50:49,813 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 21:50:49,815 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2021-10-05 21:50:49,815 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481225055] [2021-10-05 21:50:49,817 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-05 21:50:49,817 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 21:50:49,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-05 21:50:49,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-10-05 21:50:49,821 INFO L87 Difference]: Start difference. First operand 132 states and 357 transitions. Second operand has 16 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 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) [2021-10-05 21:50:50,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 21:50:50,210 INFO L93 Difference]: Finished difference Result 208 states and 523 transitions. [2021-10-05 21:50:50,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-10-05 21:50:50,211 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 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 [2021-10-05 21:50:50,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 21:50:50,213 INFO L225 Difference]: With dead ends: 208 [2021-10-05 21:50:50,213 INFO L226 Difference]: Without dead ends: 170 [2021-10-05 21:50:50,214 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 349.9ms TimeCoverageRelationStatistics Valid=117, Invalid=533, Unknown=0, NotChecked=0, Total=650 [2021-10-05 21:50:50,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2021-10-05 21:50:50,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 148. [2021-10-05 21:50:50,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 2.7142857142857144) internal successors, (399), 147 states have internal predecessors, (399), 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) [2021-10-05 21:50:50,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 399 transitions. [2021-10-05 21:50:50,227 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 399 transitions. Word has length 17 [2021-10-05 21:50:50,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 21:50:50,228 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 399 transitions. [2021-10-05 21:50:50,228 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 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) [2021-10-05 21:50:50,228 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 399 transitions. [2021-10-05 21:50:50,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-05 21:50:50,230 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 21:50:50,230 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 21:50:50,265 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 [2021-10-05 21:50:50,443 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 21:50:50,444 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-05 21:50:50,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 21:50:50,445 INFO L82 PathProgramCache]: Analyzing trace with hash 364746575, now seen corresponding path program 6 times [2021-10-05 21:50:50,445 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 21:50:50,446 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885127813] [2021-10-05 21:50:50,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 21:50:50,446 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 21:50:50,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 21:50:50,638 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 21:50:50,638 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 21:50:50,639 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885127813] [2021-10-05 21:50:50,639 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1885127813] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:50:50,639 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1095323444] [2021-10-05 21:50:50,639 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-05 21:50:50,640 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 21:50:50,640 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 21:50:50,641 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) [2021-10-05 21:50:50,651 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 [2021-10-05 21:50:50,772 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-10-05 21:50:50,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-05 21:50:50,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 27 conjunts are in the unsatisfiable core [2021-10-05 21:50:50,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 21:50:51,128 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 21:50:51,129 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1095323444] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:50:51,129 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 21:50:51,129 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2021-10-05 21:50:51,129 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229672572] [2021-10-05 21:50:51,130 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-05 21:50:51,130 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 21:50:51,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-05 21:50:51,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-10-05 21:50:51,131 INFO L87 Difference]: Start difference. First operand 148 states and 399 transitions. Second operand has 14 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 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) [2021-10-05 21:50:51,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 21:50:51,579 INFO L93 Difference]: Finished difference Result 258 states and 653 transitions. [2021-10-05 21:50:51,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-10-05 21:50:51,580 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 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 [2021-10-05 21:50:51,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 21:50:51,583 INFO L225 Difference]: With dead ends: 258 [2021-10-05 21:50:51,583 INFO L226 Difference]: Without dead ends: 206 [2021-10-05 21:50:51,584 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 376.0ms TimeCoverageRelationStatistics Valid=113, Invalid=439, Unknown=0, NotChecked=0, Total=552 [2021-10-05 21:50:51,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2021-10-05 21:50:51,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 160. [2021-10-05 21:50:51,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 2.710691823899371) internal successors, (431), 159 states have internal predecessors, (431), 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) [2021-10-05 21:50:51,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 431 transitions. [2021-10-05 21:50:51,597 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 431 transitions. Word has length 17 [2021-10-05 21:50:51,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 21:50:51,598 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 431 transitions. [2021-10-05 21:50:51,598 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 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) [2021-10-05 21:50:51,598 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 431 transitions. [2021-10-05 21:50:51,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-05 21:50:51,600 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 21:50:51,601 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 21:50:51,641 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 [2021-10-05 21:50:51,816 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 21:50:51,817 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-05 21:50:51,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 21:50:51,818 INFO L82 PathProgramCache]: Analyzing trace with hash -508240856, now seen corresponding path program 7 times [2021-10-05 21:50:51,819 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 21:50:51,819 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492118250] [2021-10-05 21:50:51,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 21:50:51,820 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 21:50:51,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 21:50:51,981 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 21:50:51,981 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 21:50:51,981 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492118250] [2021-10-05 21:50:51,981 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492118250] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:50:51,982 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1265421942] [2021-10-05 21:50:51,982 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-05 21:50:51,982 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 21:50:51,982 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 21:50:51,983 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) [2021-10-05 21:50:52,003 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 [2021-10-05 21:50:52,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 21:50:52,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 27 conjunts are in the unsatisfiable core [2021-10-05 21:50:52,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 21:50:52,486 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 21:50:52,486 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1265421942] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:50:52,486 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 21:50:52,487 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2021-10-05 21:50:52,487 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361106282] [2021-10-05 21:50:52,488 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-05 21:50:52,488 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 21:50:52,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-05 21:50:52,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2021-10-05 21:50:52,489 INFO L87 Difference]: Start difference. First operand 160 states and 431 transitions. Second operand has 16 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 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) [2021-10-05 21:50:53,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 21:50:53,514 INFO L93 Difference]: Finished difference Result 334 states and 880 transitions. [2021-10-05 21:50:53,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-10-05 21:50:53,515 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 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 19 [2021-10-05 21:50:53,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 21:50:53,518 INFO L225 Difference]: With dead ends: 334 [2021-10-05 21:50:53,518 INFO L226 Difference]: Without dead ends: 312 [2021-10-05 21:50:53,519 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 827.1ms TimeCoverageRelationStatistics Valid=220, Invalid=970, Unknown=0, NotChecked=0, Total=1190 [2021-10-05 21:50:53,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2021-10-05 21:50:53,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 212. [2021-10-05 21:50:53,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 211 states have (on average 2.7251184834123223) internal successors, (575), 211 states have internal predecessors, (575), 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) [2021-10-05 21:50:53,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 575 transitions. [2021-10-05 21:50:53,531 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 575 transitions. Word has length 19 [2021-10-05 21:50:53,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 21:50:53,531 INFO L470 AbstractCegarLoop]: Abstraction has 212 states and 575 transitions. [2021-10-05 21:50:53,532 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 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) [2021-10-05 21:50:53,532 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 575 transitions. [2021-10-05 21:50:53,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-05 21:50:53,534 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 21:50:53,535 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 21:50:53,564 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-10-05 21:50:53,749 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 21:50:53,750 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-05 21:50:53,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 21:50:53,751 INFO L82 PathProgramCache]: Analyzing trace with hash -2026142386, now seen corresponding path program 8 times [2021-10-05 21:50:53,752 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 21:50:53,752 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450429424] [2021-10-05 21:50:53,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 21:50:53,753 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 21:50:53,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 21:50:53,903 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 21:50:53,904 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 21:50:53,904 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450429424] [2021-10-05 21:50:53,904 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1450429424] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:50:53,905 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1997947818] [2021-10-05 21:50:53,905 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-05 21:50:53,905 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 21:50:53,905 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 21:50:53,906 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) [2021-10-05 21:50:53,932 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 [2021-10-05 21:50:54,074 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-05 21:50:54,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-05 21:50:54,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 27 conjunts are in the unsatisfiable core [2021-10-05 21:50:54,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 21:50:54,466 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 21:50:54,467 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1997947818] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:50:54,467 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 21:50:54,467 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 15 [2021-10-05 21:50:54,467 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480713576] [2021-10-05 21:50:54,468 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-10-05 21:50:54,468 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 21:50:54,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-10-05 21:50:54,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-10-05 21:50:54,469 INFO L87 Difference]: Start difference. First operand 212 states and 575 transitions. Second operand has 17 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 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) [2021-10-05 21:50:55,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 21:50:55,770 INFO L93 Difference]: Finished difference Result 472 states and 1295 transitions. [2021-10-05 21:50:55,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-10-05 21:50:55,771 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 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 19 [2021-10-05 21:50:55,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 21:50:55,775 INFO L225 Difference]: With dead ends: 472 [2021-10-05 21:50:55,775 INFO L226 Difference]: Without dead ends: 450 [2021-10-05 21:50:55,776 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 331 ImplicationChecksByTransitivity, 946.7ms TimeCoverageRelationStatistics Valid=229, Invalid=1177, Unknown=0, NotChecked=0, Total=1406 [2021-10-05 21:50:55,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2021-10-05 21:50:55,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 234. [2021-10-05 21:50:55,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 233 states have (on average 2.7339055793991416) internal successors, (637), 233 states have internal predecessors, (637), 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) [2021-10-05 21:50:55,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 637 transitions. [2021-10-05 21:50:55,790 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 637 transitions. Word has length 19 [2021-10-05 21:50:55,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 21:50:55,790 INFO L470 AbstractCegarLoop]: Abstraction has 234 states and 637 transitions. [2021-10-05 21:50:55,790 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 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) [2021-10-05 21:50:55,790 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 637 transitions. [2021-10-05 21:50:55,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-05 21:50:55,792 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 21:50:55,792 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 21:50:55,821 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 [2021-10-05 21:50:56,006 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-10-05 21:50:56,007 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-05 21:50:56,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 21:50:56,008 INFO L82 PathProgramCache]: Analyzing trace with hash -170216088, now seen corresponding path program 9 times [2021-10-05 21:50:56,008 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 21:50:56,009 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781219212] [2021-10-05 21:50:56,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 21:50:56,010 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 21:50:56,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 21:50:56,129 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-05 21:50:56,130 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 21:50:56,130 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781219212] [2021-10-05 21:50:56,130 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1781219212] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:50:56,130 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2040419353] [2021-10-05 21:50:56,130 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-05 21:50:56,130 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 21:50:56,131 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 21:50:56,132 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) [2021-10-05 21:50:56,140 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 [2021-10-05 21:50:56,325 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-10-05 21:50:56,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-05 21:50:56,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 29 conjunts are in the unsatisfiable core [2021-10-05 21:50:56,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 21:50:56,660 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 21:50:56,660 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2040419353] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:50:56,661 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 21:50:56,661 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 14 [2021-10-05 21:50:56,661 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493030305] [2021-10-05 21:50:56,662 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-05 21:50:56,662 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 21:50:56,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-05 21:50:56,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-10-05 21:50:56,663 INFO L87 Difference]: Start difference. First operand 234 states and 637 transitions. Second operand has 16 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 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) [2021-10-05 21:50:57,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 21:50:57,282 INFO L93 Difference]: Finished difference Result 406 states and 1081 transitions. [2021-10-05 21:50:57,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-10-05 21:50:57,283 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 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 19 [2021-10-05 21:50:57,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 21:50:57,290 INFO L225 Difference]: With dead ends: 406 [2021-10-05 21:50:57,291 INFO L226 Difference]: Without dead ends: 384 [2021-10-05 21:50:57,292 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 456.5ms TimeCoverageRelationStatistics Valid=134, Invalid=568, Unknown=0, NotChecked=0, Total=702 [2021-10-05 21:50:57,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2021-10-05 21:50:57,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 264. [2021-10-05 21:50:57,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 263 states have (on average 2.790874524714829) internal successors, (734), 263 states have internal predecessors, (734), 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) [2021-10-05 21:50:57,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 734 transitions. [2021-10-05 21:50:57,305 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 734 transitions. Word has length 19 [2021-10-05 21:50:57,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 21:50:57,306 INFO L470 AbstractCegarLoop]: Abstraction has 264 states and 734 transitions. [2021-10-05 21:50:57,306 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 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) [2021-10-05 21:50:57,306 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 734 transitions. [2021-10-05 21:50:57,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-05 21:50:57,308 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 21:50:57,308 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 21:50:57,341 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 [2021-10-05 21:50:57,523 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,SelfDestructingSolverStorable10 [2021-10-05 21:50:57,524 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-05 21:50:57,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 21:50:57,525 INFO L82 PathProgramCache]: Analyzing trace with hash -1688117618, now seen corresponding path program 10 times [2021-10-05 21:50:57,525 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 21:50:57,526 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299646264] [2021-10-05 21:50:57,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 21:50:57,527 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 21:50:57,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 21:50:57,648 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 21:50:57,648 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 21:50:57,649 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299646264] [2021-10-05 21:50:57,649 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299646264] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:50:57,650 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [903076740] [2021-10-05 21:50:57,651 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-05 21:50:57,651 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 21:50:57,651 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 21:50:57,653 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 21:50:57,675 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-10-05 21:50:57,850 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-05 21:50:57,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-05 21:50:57,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 29 conjunts are in the unsatisfiable core [2021-10-05 21:50:57,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 21:50:58,236 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 21:50:58,238 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [903076740] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:50:58,238 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 21:50:58,238 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 15 [2021-10-05 21:50:58,239 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563084435] [2021-10-05 21:50:58,239 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-10-05 21:50:58,239 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 21:50:58,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-10-05 21:50:58,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-10-05 21:50:58,241 INFO L87 Difference]: Start difference. First operand 264 states and 734 transitions. Second operand has 17 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 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) [2021-10-05 21:50:58,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 21:50:58,781 INFO L93 Difference]: Finished difference Result 332 states and 876 transitions. [2021-10-05 21:50:58,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-05 21:50:58,782 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 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 19 [2021-10-05 21:50:58,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 21:50:58,784 INFO L225 Difference]: With dead ends: 332 [2021-10-05 21:50:58,784 INFO L226 Difference]: Without dead ends: 296 [2021-10-05 21:50:58,785 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 459.8ms TimeCoverageRelationStatistics Valid=141, Invalid=615, Unknown=0, NotChecked=0, Total=756 [2021-10-05 21:50:58,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2021-10-05 21:50:58,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 284. [2021-10-05 21:50:58,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 283 states have (on average 2.724381625441696) internal successors, (771), 283 states have internal predecessors, (771), 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) [2021-10-05 21:50:58,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 771 transitions. [2021-10-05 21:50:58,796 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 771 transitions. Word has length 19 [2021-10-05 21:50:58,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 21:50:58,796 INFO L470 AbstractCegarLoop]: Abstraction has 284 states and 771 transitions. [2021-10-05 21:50:58,797 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 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) [2021-10-05 21:50:58,797 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 771 transitions. [2021-10-05 21:50:58,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-05 21:50:58,798 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 21:50:58,798 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 21:50:58,834 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-10-05 21:50:59,012 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 21:50:59,013 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-05 21:50:59,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 21:50:59,014 INFO L82 PathProgramCache]: Analyzing trace with hash -914918586, now seen corresponding path program 11 times [2021-10-05 21:50:59,014 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 21:50:59,014 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067888027] [2021-10-05 21:50:59,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 21:50:59,015 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 21:50:59,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 21:50:59,134 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 21:50:59,135 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 21:50:59,135 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067888027] [2021-10-05 21:50:59,135 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067888027] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:50:59,135 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [639025707] [2021-10-05 21:50:59,135 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-05 21:50:59,135 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 21:50:59,136 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 21:50:59,137 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 21:50:59,151 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-10-05 21:50:59,354 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-10-05 21:50:59,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-05 21:50:59,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 29 conjunts are in the unsatisfiable core [2021-10-05 21:50:59,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 21:50:59,689 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 21:50:59,690 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [639025707] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:50:59,690 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 21:50:59,690 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 14 [2021-10-05 21:50:59,690 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049836762] [2021-10-05 21:50:59,692 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-05 21:50:59,692 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 21:50:59,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-05 21:50:59,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-10-05 21:50:59,693 INFO L87 Difference]: Start difference. First operand 284 states and 771 transitions. Second operand has 16 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 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) [2021-10-05 21:51:00,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 21:51:00,349 INFO L93 Difference]: Finished difference Result 346 states and 916 transitions. [2021-10-05 21:51:00,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-05 21:51:00,350 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 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 19 [2021-10-05 21:51:00,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 21:51:00,354 INFO L225 Difference]: With dead ends: 346 [2021-10-05 21:51:00,354 INFO L226 Difference]: Without dead ends: 324 [2021-10-05 21:51:00,355 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 559.8ms TimeCoverageRelationStatistics Valid=160, Invalid=710, Unknown=0, NotChecked=0, Total=870 [2021-10-05 21:51:00,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2021-10-05 21:51:00,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 254. [2021-10-05 21:51:00,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 253 states have (on average 2.6956521739130435) internal successors, (682), 253 states have internal predecessors, (682), 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) [2021-10-05 21:51:00,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 682 transitions. [2021-10-05 21:51:00,371 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 682 transitions. Word has length 19 [2021-10-05 21:51:00,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 21:51:00,373 INFO L470 AbstractCegarLoop]: Abstraction has 254 states and 682 transitions. [2021-10-05 21:51:00,373 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 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) [2021-10-05 21:51:00,373 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 682 transitions. [2021-10-05 21:51:00,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-05 21:51:00,376 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 21:51:00,376 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 21:51:00,403 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2021-10-05 21:51:00,591 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-10-05 21:51:00,592 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-05 21:51:00,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 21:51:00,593 INFO L82 PathProgramCache]: Analyzing trace with hash 1130935207, now seen corresponding path program 12 times [2021-10-05 21:51:00,593 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 21:51:00,593 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66102438] [2021-10-05 21:51:00,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 21:51:00,594 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 21:51:00,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 21:51:00,635 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-05 21:51:00,635 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 21:51:00,636 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66102438] [2021-10-05 21:51:00,636 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [66102438] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:51:00,636 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1062093314] [2021-10-05 21:51:00,636 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-05 21:51:00,636 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 21:51:00,636 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 21:51:00,637 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 21:51:00,645 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-10-05 21:51:00,851 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-10-05 21:51:00,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-05 21:51:00,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-05 21:51:00,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 21:51:00,908 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-05 21:51:00,909 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1062093314] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:51:00,909 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 21:51:00,909 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-10-05 21:51:00,910 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619488340] [2021-10-05 21:51:00,910 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-05 21:51:00,910 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 21:51:00,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-05 21:51:00,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-10-05 21:51:00,911 INFO L87 Difference]: Start difference. First operand 254 states and 682 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 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) [2021-10-05 21:51:00,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 21:51:00,936 INFO L93 Difference]: Finished difference Result 334 states and 878 transitions. [2021-10-05 21:51:00,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-05 21:51:00,937 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 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 19 [2021-10-05 21:51:00,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 21:51:00,940 INFO L225 Difference]: With dead ends: 334 [2021-10-05 21:51:00,940 INFO L226 Difference]: Without dead ends: 332 [2021-10-05 21:51:00,940 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 7.9ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-10-05 21:51:00,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2021-10-05 21:51:00,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 274. [2021-10-05 21:51:00,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 273 states have (on average 2.681318681318681) internal successors, (732), 273 states have internal predecessors, (732), 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) [2021-10-05 21:51:00,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 732 transitions. [2021-10-05 21:51:00,951 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 732 transitions. Word has length 19 [2021-10-05 21:51:00,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 21:51:00,952 INFO L470 AbstractCegarLoop]: Abstraction has 274 states and 732 transitions. [2021-10-05 21:51:00,952 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 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) [2021-10-05 21:51:00,952 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 732 transitions. [2021-10-05 21:51:00,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-05 21:51:00,953 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 21:51:00,953 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 21:51:00,984 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-10-05 21:51:01,166 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,12 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 21:51:01,167 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-05 21:51:01,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 21:51:01,168 INFO L82 PathProgramCache]: Analyzing trace with hash -806666880, now seen corresponding path program 13 times [2021-10-05 21:51:01,168 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 21:51:01,168 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783690006] [2021-10-05 21:51:01,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 21:51:01,169 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 21:51:01,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 21:51:01,368 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 21:51:01,368 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 21:51:01,369 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783690006] [2021-10-05 21:51:01,369 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [783690006] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:51:01,369 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [250990161] [2021-10-05 21:51:01,369 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-05 21:51:01,369 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 21:51:01,370 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 21:51:01,370 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 21:51:01,392 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-10-05 21:51:01,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 21:51:01,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 31 conjunts are in the unsatisfiable core [2021-10-05 21:51:01,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 21:51:02,059 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 21:51:02,060 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [250990161] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:51:02,060 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 21:51:02,060 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2021-10-05 21:51:02,060 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538089777] [2021-10-05 21:51:02,061 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-10-05 21:51:02,061 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 21:51:02,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-10-05 21:51:02,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2021-10-05 21:51:02,063 INFO L87 Difference]: Start difference. First operand 274 states and 732 transitions. Second operand has 20 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 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) [2021-10-05 21:51:02,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 21:51:02,950 INFO L93 Difference]: Finished difference Result 546 states and 1444 transitions. [2021-10-05 21:51:02,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-10-05 21:51:02,951 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 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 21 [2021-10-05 21:51:02,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 21:51:02,956 INFO L225 Difference]: With dead ends: 546 [2021-10-05 21:51:02,956 INFO L226 Difference]: Without dead ends: 528 [2021-10-05 21:51:02,957 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 767.1ms TimeCoverageRelationStatistics Valid=222, Invalid=1184, Unknown=0, NotChecked=0, Total=1406 [2021-10-05 21:51:02,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 528 states. [2021-10-05 21:51:02,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 528 to 366. [2021-10-05 21:51:02,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 366 states, 365 states have (on average 2.756164383561644) internal successors, (1006), 365 states have internal predecessors, (1006), 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) [2021-10-05 21:51:02,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 1006 transitions. [2021-10-05 21:51:02,973 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 1006 transitions. Word has length 21 [2021-10-05 21:51:02,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 21:51:02,973 INFO L470 AbstractCegarLoop]: Abstraction has 366 states and 1006 transitions. [2021-10-05 21:51:02,973 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 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) [2021-10-05 21:51:02,974 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 1006 transitions. [2021-10-05 21:51:02,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-05 21:51:02,975 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 21:51:02,975 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 21:51:03,007 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-10-05 21:51:03,190 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-10-05 21:51:03,191 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-05 21:51:03,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 21:51:03,192 INFO L82 PathProgramCache]: Analyzing trace with hash 1970398886, now seen corresponding path program 14 times [2021-10-05 21:51:03,192 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 21:51:03,192 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063627827] [2021-10-05 21:51:03,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 21:51:03,193 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 21:51:03,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 21:51:03,381 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 21:51:03,381 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 21:51:03,381 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063627827] [2021-10-05 21:51:03,382 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063627827] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:51:03,382 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [43529463] [2021-10-05 21:51:03,382 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-05 21:51:03,382 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 21:51:03,382 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 21:51:03,383 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 21:51:03,409 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-10-05 21:51:03,638 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-05 21:51:03,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-05 21:51:03,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 33 conjunts are in the unsatisfiable core [2021-10-05 21:51:03,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 21:51:04,235 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 21:51:04,236 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [43529463] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:51:04,236 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 21:51:04,236 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 19 [2021-10-05 21:51:04,236 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329974708] [2021-10-05 21:51:04,238 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-10-05 21:51:04,238 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 21:51:04,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-10-05 21:51:04,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-10-05 21:51:04,240 INFO L87 Difference]: Start difference. First operand 366 states and 1006 transitions. Second operand has 21 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 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) [2021-10-05 21:51:05,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 21:51:05,436 INFO L93 Difference]: Finished difference Result 538 states and 1393 transitions. [2021-10-05 21:51:05,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-10-05 21:51:05,437 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 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 21 [2021-10-05 21:51:05,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 21:51:05,440 INFO L225 Difference]: With dead ends: 538 [2021-10-05 21:51:05,441 INFO L226 Difference]: Without dead ends: 524 [2021-10-05 21:51:05,442 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 373 ImplicationChecksByTransitivity, 898.7ms TimeCoverageRelationStatistics Valid=226, Invalid=1414, Unknown=0, NotChecked=0, Total=1640 [2021-10-05 21:51:05,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 524 states. [2021-10-05 21:51:05,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 524 to 372. [2021-10-05 21:51:05,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 372 states, 371 states have (on average 2.7681940700808627) internal successors, (1027), 371 states have internal predecessors, (1027), 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) [2021-10-05 21:51:05,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 1027 transitions. [2021-10-05 21:51:05,458 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 1027 transitions. Word has length 21 [2021-10-05 21:51:05,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 21:51:05,458 INFO L470 AbstractCegarLoop]: Abstraction has 372 states and 1027 transitions. [2021-10-05 21:51:05,459 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 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) [2021-10-05 21:51:05,459 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 1027 transitions. [2021-10-05 21:51:05,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-05 21:51:05,460 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 21:51:05,460 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 21:51:05,494 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-10-05 21:51:05,674 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-10-05 21:51:05,675 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-05 21:51:05,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 21:51:05,676 INFO L82 PathProgramCache]: Analyzing trace with hash -1953109696, now seen corresponding path program 15 times [2021-10-05 21:51:05,676 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 21:51:05,676 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367362354] [2021-10-05 21:51:05,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 21:51:05,677 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 21:51:05,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 21:51:05,838 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-05 21:51:05,838 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 21:51:05,838 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367362354] [2021-10-05 21:51:05,838 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367362354] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:51:05,839 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1930883408] [2021-10-05 21:51:05,839 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-05 21:51:05,839 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 21:51:05,839 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 21:51:05,841 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 21:51:05,842 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-10-05 21:51:06,126 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-05 21:51:06,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-05 21:51:06,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 33 conjunts are in the unsatisfiable core [2021-10-05 21:51:06,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 21:51:06,699 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 21:51:06,700 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1930883408] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:51:06,700 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 21:51:06,700 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 18 [2021-10-05 21:51:06,700 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601707933] [2021-10-05 21:51:06,701 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-10-05 21:51:06,701 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 21:51:06,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-10-05 21:51:06,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2021-10-05 21:51:06,702 INFO L87 Difference]: Start difference. First operand 372 states and 1027 transitions. Second operand has 20 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 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) [2021-10-05 21:51:07,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 21:51:07,687 INFO L93 Difference]: Finished difference Result 518 states and 1396 transitions. [2021-10-05 21:51:07,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-10-05 21:51:07,688 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 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 21 [2021-10-05 21:51:07,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 21:51:07,691 INFO L225 Difference]: With dead ends: 518 [2021-10-05 21:51:07,692 INFO L226 Difference]: Without dead ends: 492 [2021-10-05 21:51:07,692 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 319 ImplicationChecksByTransitivity, 893.9ms TimeCoverageRelationStatistics Valid=227, Invalid=1255, Unknown=0, NotChecked=0, Total=1482 [2021-10-05 21:51:07,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 492 states. [2021-10-05 21:51:07,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 492 to 376. [2021-10-05 21:51:07,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 376 states, 375 states have (on average 2.7386666666666666) internal successors, (1027), 375 states have internal predecessors, (1027), 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) [2021-10-05 21:51:07,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 1027 transitions. [2021-10-05 21:51:07,709 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 1027 transitions. Word has length 21 [2021-10-05 21:51:07,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 21:51:07,709 INFO L470 AbstractCegarLoop]: Abstraction has 376 states and 1027 transitions. [2021-10-05 21:51:07,709 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 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) [2021-10-05 21:51:07,709 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 1027 transitions. [2021-10-05 21:51:07,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-05 21:51:07,711 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 21:51:07,711 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 21:51:07,752 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-10-05 21:51:07,924 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-10-05 21:51:07,925 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-05 21:51:07,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 21:51:07,926 INFO L82 PathProgramCache]: Analyzing trace with hash 823956070, now seen corresponding path program 16 times [2021-10-05 21:51:07,926 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 21:51:07,926 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470841713] [2021-10-05 21:51:07,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 21:51:07,927 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 21:51:07,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 21:51:08,115 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 21:51:08,116 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 21:51:08,116 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470841713] [2021-10-05 21:51:08,116 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470841713] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:51:08,116 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1728366257] [2021-10-05 21:51:08,116 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-05 21:51:08,116 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 21:51:08,117 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 21:51:08,117 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 21:51:08,144 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-10-05 21:51:08,418 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-05 21:51:08,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-05 21:51:08,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 33 conjunts are in the unsatisfiable core [2021-10-05 21:51:08,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 21:51:08,859 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 21:51:08,860 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1728366257] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:51:08,860 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 21:51:08,860 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 19 [2021-10-05 21:51:08,861 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155873030] [2021-10-05 21:51:08,861 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-10-05 21:51:08,862 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 21:51:08,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-10-05 21:51:08,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2021-10-05 21:51:08,863 INFO L87 Difference]: Start difference. First operand 376 states and 1027 transitions. Second operand has 21 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 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) [2021-10-05 21:51:09,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 21:51:09,723 INFO L93 Difference]: Finished difference Result 414 states and 1084 transitions. [2021-10-05 21:51:09,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-10-05 21:51:09,724 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 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 21 [2021-10-05 21:51:09,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 21:51:09,727 INFO L225 Difference]: With dead ends: 414 [2021-10-05 21:51:09,728 INFO L226 Difference]: Without dead ends: 364 [2021-10-05 21:51:09,728 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 344 ImplicationChecksByTransitivity, 754.1ms TimeCoverageRelationStatistics Valid=213, Invalid=1269, Unknown=0, NotChecked=0, Total=1482 [2021-10-05 21:51:09,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2021-10-05 21:51:09,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 244. [2021-10-05 21:51:09,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 243 states have (on average 2.625514403292181) internal successors, (638), 243 states have internal predecessors, (638), 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) [2021-10-05 21:51:09,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 638 transitions. [2021-10-05 21:51:09,741 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 638 transitions. Word has length 21 [2021-10-05 21:51:09,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 21:51:09,741 INFO L470 AbstractCegarLoop]: Abstraction has 244 states and 638 transitions. [2021-10-05 21:51:09,741 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 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) [2021-10-05 21:51:09,741 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 638 transitions. [2021-10-05 21:51:09,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-05 21:51:09,743 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 21:51:09,743 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 21:51:09,780 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-10-05 21:51:09,956 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-10-05 21:51:09,957 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-05 21:51:09,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 21:51:09,957 INFO L82 PathProgramCache]: Analyzing trace with hash 1597155102, now seen corresponding path program 17 times [2021-10-05 21:51:09,957 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 21:51:09,957 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905732881] [2021-10-05 21:51:09,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 21:51:09,958 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 21:51:09,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 21:51:10,105 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 21:51:10,106 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 21:51:10,106 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905732881] [2021-10-05 21:51:10,106 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [905732881] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:51:10,106 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [310285921] [2021-10-05 21:51:10,107 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-05 21:51:10,107 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 21:51:10,107 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 21:51:10,108 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 21:51:10,132 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-10-05 21:51:10,444 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-10-05 21:51:10,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-05 21:51:10,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 33 conjunts are in the unsatisfiable core [2021-10-05 21:51:10,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 21:51:10,883 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 21:51:10,884 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [310285921] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:51:10,884 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 21:51:10,884 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 18 [2021-10-05 21:51:10,884 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039987142] [2021-10-05 21:51:10,885 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-10-05 21:51:10,885 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 21:51:10,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-10-05 21:51:10,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-10-05 21:51:10,886 INFO L87 Difference]: Start difference. First operand 244 states and 638 transitions. Second operand has 20 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 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) [2021-10-05 21:51:11,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 21:51:11,742 INFO L93 Difference]: Finished difference Result 284 states and 732 transitions. [2021-10-05 21:51:11,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-10-05 21:51:11,742 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 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 21 [2021-10-05 21:51:11,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 21:51:11,742 INFO L225 Difference]: With dead ends: 284 [2021-10-05 21:51:11,742 INFO L226 Difference]: Without dead ends: 0 [2021-10-05 21:51:11,743 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 792.4ms TimeCoverageRelationStatistics Valid=196, Invalid=1136, Unknown=0, NotChecked=0, Total=1332 [2021-10-05 21:51:11,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-05 21:51:11,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-05 21:51:11,744 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) [2021-10-05 21:51:11,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-05 21:51:11,744 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 21 [2021-10-05 21:51:11,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 21:51:11,744 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-05 21:51:11,745 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 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) [2021-10-05 21:51:11,745 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-05 21:51:11,745 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-05 21:51:11,747 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-05 21:51:11,748 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATION [2021-10-05 21:51:11,748 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATION [2021-10-05 21:51:11,774 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-10-05 21:51:11,956 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 21:51:11,963 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-10-05 21:51:11,963 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-05 21:51:11,965 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.10 09:51:11 BasicIcfg [2021-10-05 21:51:11,965 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-05 21:51:11,966 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-05 21:51:11,966 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-05 21:51:11,966 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-05 21:51:11,967 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.10 09:50:40" (3/4) ... [2021-10-05 21:51:11,969 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-05 21:51:11,975 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure thread1 [2021-10-05 21:51:11,975 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure thread2 [2021-10-05 21:51:11,981 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 14 nodes and edges [2021-10-05 21:51:11,981 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2021-10-05 21:51:11,981 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-10-05 21:51:11,981 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-05 21:51:12,018 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-10-05 21:51:12,018 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-05 21:51:12,020 INFO L168 Benchmark]: Toolchain (without parser) took 32725.53 ms. Allocated memory was 54.5 MB in the beginning and 157.3 MB in the end (delta: 102.8 MB). Free memory was 30.6 MB in the beginning and 68.7 MB in the end (delta: -38.1 MB). Peak memory consumption was 68.6 MB. Max. memory is 16.1 GB. [2021-10-05 21:51:12,021 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 54.5 MB. Free memory was 37.5 MB in the beginning and 37.4 MB in the end (delta: 73.4 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-05 21:51:12,021 INFO L168 Benchmark]: CACSL2BoogieTranslator took 346.66 ms. Allocated memory is still 54.5 MB. Free memory was 30.2 MB in the beginning and 33.3 MB in the end (delta: -3.1 MB). Peak memory consumption was 7.7 MB. Max. memory is 16.1 GB. [2021-10-05 21:51:12,022 INFO L168 Benchmark]: Boogie Procedure Inliner took 55.30 ms. Allocated memory is still 54.5 MB. Free memory was 33.3 MB in the beginning and 31.8 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-05 21:51:12,022 INFO L168 Benchmark]: Boogie Preprocessor took 64.96 ms. Allocated memory is still 54.5 MB. Free memory was 31.8 MB in the beginning and 30.7 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-05 21:51:12,023 INFO L168 Benchmark]: RCFGBuilder took 621.37 ms. Allocated memory was 54.5 MB in the beginning and 73.4 MB in the end (delta: 18.9 MB). Free memory was 30.7 MB in the beginning and 50.0 MB in the end (delta: -19.2 MB). Peak memory consumption was 8.1 MB. Max. memory is 16.1 GB. [2021-10-05 21:51:12,023 INFO L168 Benchmark]: TraceAbstraction took 31567.35 ms. Allocated memory was 73.4 MB in the beginning and 157.3 MB in the end (delta: 83.9 MB). Free memory was 49.4 MB in the beginning and 71.6 MB in the end (delta: -22.2 MB). Peak memory consumption was 61.3 MB. Max. memory is 16.1 GB. [2021-10-05 21:51:12,024 INFO L168 Benchmark]: Witness Printer took 52.47 ms. Allocated memory is still 157.3 MB. Free memory was 71.6 MB in the beginning and 68.7 MB in the end (delta: 2.9 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-05 21:51:12,026 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 54.5 MB. Free memory was 37.5 MB in the beginning and 37.4 MB in the end (delta: 73.4 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 346.66 ms. Allocated memory is still 54.5 MB. Free memory was 30.2 MB in the beginning and 33.3 MB in the end (delta: -3.1 MB). Peak memory consumption was 7.7 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 55.30 ms. Allocated memory is still 54.5 MB. Free memory was 33.3 MB in the beginning and 31.8 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 64.96 ms. Allocated memory is still 54.5 MB. Free memory was 31.8 MB in the beginning and 30.7 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 621.37 ms. Allocated memory was 54.5 MB in the beginning and 73.4 MB in the end (delta: 18.9 MB). Free memory was 30.7 MB in the beginning and 50.0 MB in the end (delta: -19.2 MB). Peak memory consumption was 8.1 MB. Max. memory is 16.1 GB. * TraceAbstraction took 31567.35 ms. Allocated memory was 73.4 MB in the beginning and 157.3 MB in the end (delta: 83.9 MB). Free memory was 49.4 MB in the beginning and 71.6 MB in the end (delta: -22.2 MB). Peak memory consumption was 61.3 MB. Max. memory is 16.1 GB. * Witness Printer took 52.47 ms. Allocated memory is still 157.3 MB. Free memory was 71.6 MB in the beginning and 68.7 MB in the end (delta: 2.9 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: 3228.3ms, 75 PlacesBefore, 23 PlacesAfterwards, 75 TransitionsBefore, 19 TransitionsAfterwards, 282 CoEnabledTransitionPairs, 7 FixpointIterations, 43 TrivialSequentialCompositions, 10 ConcurrentSequentialCompositions, 3 TrivialYvCompositions, 4 ConcurrentYvCompositions, 4 ChoiceCompositions, 64 TotalNumberOfCompositions, 646 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 459, positive: 425, positive conditional: 0, positive unconditional: 425, negative: 34, negative conditional: 0, negative unconditional: 34, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 197, positive: 192, positive conditional: 0, positive unconditional: 192, negative: 5, negative conditional: 0, negative unconditional: 5, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 197, positive: 184, positive conditional: 0, positive unconditional: 184, negative: 13, negative conditional: 0, negative unconditional: 13, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 13, positive: 8, positive conditional: 0, positive unconditional: 8, negative: 5, negative conditional: 0, negative unconditional: 5, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 41, positive: 26, positive conditional: 0, positive unconditional: 26, negative: 14, negative conditional: 0, negative unconditional: 14, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 459, positive: 233, positive conditional: 0, positive unconditional: 233, negative: 29, negative conditional: 0, negative unconditional: 29, unknown: 197, unknown conditional: 0, unknown unconditional: 197] , Statistics on independence cache: Total cache size (in pairs): 36, Positive cache size: 34, Positive conditional cache size: 0, Positive unconditional cache size: 34, Negative cache size: 2, Negative conditional cache size: 0, Negative unconditional cache size: 2 - 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: 79]: 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, 81 locations, 3 error locations. Started 1 CEGAR loops. OverallTime: 31438.1ms, OverallIterations: 19, TraceHistogramMax: 3, EmptinessCheckTime: 39.1ms, AutomataDifference: 11720.5ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 3286.9ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 402 SDtfs, 1533 SDslu, 2918 SDs, 0 SdLazy, 6538 SolverSat, 486 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 3828.9ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 636 GetRequests, 183 SyntacticMatches, 1 SemanticMatches, 452 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3278 ImplicationChecksByTransitivity, 9442.4ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=376occurred in iteration=17, InterpolantAutomatonStates: 332, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 260.4ms AutomataMinimizationTime, 19 MinimizatonAttempts, 1494 StatesRemovedByMinimization, 17 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 145.3ms SsaConstructionTime, 706.2ms SatisfiabilityAnalysisTime, 8786.5ms InterpolantComputationTime, 647 NumberOfCodeBlocks, 647 NumberOfCodeBlocksAsserted, 60 NumberOfCheckSat, 612 ConstructedInterpolants, 0 QuantifiedInterpolants, 8229 SizeOfPredicates, 39 NumberOfNonLiveVariables, 1770 ConjunctsInSsa, 437 ConjunctsInUnsatCore, 35 InterpolantComputations, 3 PerfectInterpolantSequences, 17/299 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! [2021-10-05 21:51:12,068 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...