./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/test/easy1.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/test/easy1.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 ecdd6379fd7e8765bf476fee1e7dbf04fccd4a7c ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-8c2bbc9 [2021-10-04 18:26:46,770 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-04 18:26:46,773 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-04 18:26:46,808 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-04 18:26:46,809 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-04 18:26:46,811 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-04 18:26:46,813 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-04 18:26:46,816 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-04 18:26:46,818 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-04 18:26:46,820 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-04 18:26:46,821 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-04 18:26:46,823 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-04 18:26:46,823 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-04 18:26:46,825 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-04 18:26:46,827 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-04 18:26:46,829 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-04 18:26:46,830 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-04 18:26:46,831 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-04 18:26:46,833 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-04 18:26:46,836 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-04 18:26:46,838 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-04 18:26:46,844 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-04 18:26:46,846 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-04 18:26:46,847 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-04 18:26:46,851 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-04 18:26:46,851 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-04 18:26:46,852 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-04 18:26:46,856 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-04 18:26:46,857 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-04 18:26:46,858 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-04 18:26:46,862 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-04 18:26:46,863 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-04 18:26:46,864 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-04 18:26:46,865 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-04 18:26:46,866 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-04 18:26:46,866 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-04 18:26:46,869 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-04 18:26:46,869 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-04 18:26:46,870 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-04 18:26:46,871 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-04 18:26:46,874 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-04 18:26:46,877 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-04 18:26:46,938 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-04 18:26:46,938 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-04 18:26:46,939 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-04 18:26:46,940 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-04 18:26:46,941 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-04 18:26:46,942 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-04 18:26:46,943 INFO L138 SettingsManager]: * Use SBE=true [2021-10-04 18:26:46,943 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-04 18:26:46,944 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-04 18:26:46,944 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-04 18:26:46,945 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-04 18:26:46,946 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-04 18:26:46,946 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-04 18:26:46,946 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-04 18:26:46,946 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-04 18:26:46,947 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-04 18:26:46,947 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-04 18:26:46,947 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-04 18:26:46,947 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-04 18:26:46,948 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-04 18:26:46,948 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-04 18:26:46,948 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-04 18:26:46,949 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-04 18:26:46,949 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-04 18:26:46,949 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-04 18:26:46,950 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-04 18:26:46,950 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-04 18:26:46,950 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-04 18:26:46,950 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-04 18:26:46,951 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-04 18:26:46,951 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ecdd6379fd7e8765bf476fee1e7dbf04fccd4a7c [2021-10-04 18:26:47,407 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-04 18:26:47,433 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-04 18:26:47,436 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-04 18:26:47,438 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-04 18:26:47,439 INFO L275 PluginConnector]: CDTParser initialized [2021-10-04 18:26:47,440 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/test/easy1.wvr.c [2021-10-04 18:26:47,525 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/be80caa7b/2cc59743b2cb41a9b13855fe17ce66c4/FLAGb5040cfc8 [2021-10-04 18:26:48,139 INFO L306 CDTParser]: Found 1 translation units. [2021-10-04 18:26:48,140 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/releaseScripts/default/sv-benchmarks/c/weaver/test/easy1.wvr.c [2021-10-04 18:26:48,141 WARN L117 ultiparseSymbolTable]: System include pthread.h could not be resolved by CDT -- only built-in system includes are available. [2021-10-04 18:26:48,141 WARN L117 ultiparseSymbolTable]: System include assert.h could not be resolved by CDT -- only built-in system includes are available. [2021-10-04 18:26:48,148 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/be80caa7b/2cc59743b2cb41a9b13855fe17ce66c4/FLAGb5040cfc8 [2021-10-04 18:26:48,514 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/be80caa7b/2cc59743b2cb41a9b13855fe17ce66c4 [2021-10-04 18:26:48,518 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-04 18:26:48,525 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-04 18:26:48,527 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-04 18:26:48,527 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-04 18:26:48,532 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-04 18:26:48,533 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.10 06:26:48" (1/1) ... [2021-10-04 18:26:48,534 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1780149c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.10 06:26:48, skipping insertion in model container [2021-10-04 18:26:48,535 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.10 06:26:48" (1/1) ... [2021-10-04 18:26:48,543 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-04 18:26:48,559 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-04 18:26:48,689 WARN L612 FunctionHandler]: implicit declaration of function assert [2021-10-04 18:26:48,730 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/test/easy1.wvr.c[835,848] [2021-10-04 18:26:48,735 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-04 18:26:48,746 INFO L203 MainTranslator]: Completed pre-run [2021-10-04 18:26:48,759 WARN L612 FunctionHandler]: implicit declaration of function assert [2021-10-04 18:26:48,768 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/test/easy1.wvr.c[835,848] [2021-10-04 18:26:48,770 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-04 18:26:48,788 INFO L208 MainTranslator]: Completed translation [2021-10-04 18:26:48,789 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.10 06:26:48 WrapperNode [2021-10-04 18:26:48,789 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-04 18:26:48,791 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-04 18:26:48,791 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-04 18:26:48,791 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-04 18:26:48,801 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.10 06:26:48" (1/1) ... [2021-10-04 18:26:48,810 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.10 06:26:48" (1/1) ... [2021-10-04 18:26:48,835 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-04 18:26:48,839 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-04 18:26:48,839 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-04 18:26:48,840 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-04 18:26:48,850 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.10 06:26:48" (1/1) ... [2021-10-04 18:26:48,851 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.10 06:26:48" (1/1) ... [2021-10-04 18:26:48,869 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.10 06:26:48" (1/1) ... [2021-10-04 18:26:48,869 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.10 06:26:48" (1/1) ... [2021-10-04 18:26:48,878 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.10 06:26:48" (1/1) ... [2021-10-04 18:26:48,893 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.10 06:26:48" (1/1) ... [2021-10-04 18:26:48,894 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.10 06:26:48" (1/1) ... [2021-10-04 18:26:48,901 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-04 18:26:48,903 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-04 18:26:48,906 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-04 18:26:48,906 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-04 18:26:48,907 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.10 06:26:48" (1/1) ... [2021-10-04 18:26:48,922 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-04 18:26:48,938 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-04 18:26:48,963 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) [2021-10-04 18:26:48,993 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 [2021-10-04 18:26:49,069 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-10-04 18:26:49,069 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-10-04 18:26:49,070 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-10-04 18:26:49,070 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-10-04 18:26:49,071 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-04 18:26:49,071 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-04 18:26:49,071 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-04 18:26:49,072 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-04 18:26:49,072 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-04 18:26:49,074 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-04 18:26:49,077 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-10-04 18:26:49,406 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-04 18:26:49,409 INFO L299 CfgBuilder]: Removed 10 assume(true) statements. [2021-10-04 18:26:49,415 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.10 06:26:49 BoogieIcfgContainer [2021-10-04 18:26:49,415 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-04 18:26:49,419 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-04 18:26:49,420 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-04 18:26:49,426 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-04 18:26:49,431 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.10 06:26:48" (1/3) ... [2021-10-04 18:26:49,432 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@195de9fb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.10 06:26:49, skipping insertion in model container [2021-10-04 18:26:49,433 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.10 06:26:48" (2/3) ... [2021-10-04 18:26:49,433 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@195de9fb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.10 06:26:49, skipping insertion in model container [2021-10-04 18:26:49,433 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.10 06:26:49" (3/3) ... [2021-10-04 18:26:49,439 INFO L111 eAbstractionObserver]: Analyzing ICFG easy1.wvr.c [2021-10-04 18:26:49,450 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-10-04 18:26:49,455 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-04 18:26:49,455 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-04 18:26:49,456 INFO L516 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-10-04 18:26:49,504 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 18:26:49,504 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 18:26:49,505 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 18:26:49,505 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 18:26:49,506 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 18:26:49,506 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 18:26:49,507 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 18:26:49,508 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 18:26:49,508 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 18:26:49,508 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 18:26:49,509 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 18:26:49,509 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 18:26:49,513 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 18:26:49,514 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 18:26:49,514 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 18:26:49,520 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 18:26:49,521 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 18:26:49,521 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 18:26:49,531 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-10-04 18:26:49,604 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-04 18:26:49,616 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 [2021-10-04 18:26:49,617 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-10-04 18:26:49,656 INFO L118 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-10-04 18:26:49,675 INFO L133 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 68 places, 67 transitions, 150 flow [2021-10-04 18:26:49,683 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 68 places, 67 transitions, 150 flow [2021-10-04 18:26:49,685 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 68 places, 67 transitions, 150 flow [2021-10-04 18:26:49,770 INFO L129 PetriNetUnfolder]: 6/65 cut-off events. [2021-10-04 18:26:49,770 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-10-04 18:26:49,775 INFO L84 FinitePrefix]: Finished finitePrefix Result has 74 conditions, 65 events. 6/65 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 36 event pairs, 0 based on Foata normal form. 0/58 useless extension candidates. Maximal degree in co-relation 38. Up to 2 conditions per place. [2021-10-04 18:26:49,777 INFO L116 LiptonReduction]: Number of co-enabled transitions 308 [2021-10-04 18:26:51,744 INFO L131 LiptonReduction]: Checked pairs total: 341 [2021-10-04 18:26:51,745 INFO L133 LiptonReduction]: Total number of compositions: 62 [2021-10-04 18:26:51,756 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 21 places, 16 transitions, 48 flow [2021-10-04 18:26:51,769 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 20 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 18:26:51,771 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 18:26:51,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-04 18:26:51,778 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 18:26:51,779 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-04 18:26:51,780 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-04 18:26:51,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 18:26:51,787 INFO L82 PathProgramCache]: Analyzing trace with hash -1746083970, now seen corresponding path program 1 times [2021-10-04 18:26:51,798 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 18:26:51,799 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787849620] [2021-10-04 18:26:51,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 18:26:51,800 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 18:26:51,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 18:26:52,059 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 18:26:52,060 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 18:26:52,060 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787849620] [2021-10-04 18:26:52,061 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787849620] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-04 18:26:52,062 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-04 18:26:52,062 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-10-04 18:26:52,064 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279007343] [2021-10-04 18:26:52,070 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-04 18:26:52,070 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 18:26:52,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-04 18:26:52,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-04 18:26:52,090 INFO L87 Difference]: Start difference. First operand has 20 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 5.5) 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) [2021-10-04 18:26:52,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 18:26:52,123 INFO L93 Difference]: Finished difference Result 37 states and 77 transitions. [2021-10-04 18:26:52,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-04 18:26:52,125 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.5) 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 [2021-10-04 18:26:52,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 18:26:52,136 INFO L225 Difference]: With dead ends: 37 [2021-10-04 18:26:52,137 INFO L226 Difference]: Without dead ends: 32 [2021-10-04 18:26:52,138 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-04 18:26:52,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-10-04 18:26:52,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-10-04 18:26:52,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 2.161290322580645) internal successors, (67), 31 states have internal predecessors, (67), 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) [2021-10-04 18:26:52,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 67 transitions. [2021-10-04 18:26:52,185 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 67 transitions. Word has length 11 [2021-10-04 18:26:52,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 18:26:52,186 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 67 transitions. [2021-10-04 18:26:52,186 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.5) 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) [2021-10-04 18:26:52,187 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 67 transitions. [2021-10-04 18:26:52,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-04 18:26:52,188 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 18:26:52,188 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-04 18:26:52,189 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-04 18:26:52,189 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-04 18:26:52,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 18:26:52,190 INFO L82 PathProgramCache]: Analyzing trace with hash -888004464, now seen corresponding path program 1 times [2021-10-04 18:26:52,191 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 18:26:52,191 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305870054] [2021-10-04 18:26:52,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 18:26:52,192 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 18:26:52,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 18:26:52,291 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 18:26:52,292 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 18:26:52,293 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305870054] [2021-10-04 18:26:52,294 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1305870054] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 18:26:52,295 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [963459369] [2021-10-04 18:26:52,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 18:26:52,296 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 18:26:52,296 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-04 18:26:52,301 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) [2021-10-04 18:26:52,313 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 [2021-10-04 18:26:52,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 18:26:52,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-04 18:26:52,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-04 18:26:52,537 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 18:26:52,537 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [963459369] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 18:26:52,538 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-04 18:26:52,538 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2021-10-04 18:26:52,539 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847242572] [2021-10-04 18:26:52,540 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-04 18:26:52,540 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 18:26:52,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-04 18:26:52,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-04 18:26:52,542 INFO L87 Difference]: Start difference. First operand 32 states and 67 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 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) [2021-10-04 18:26:52,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 18:26:52,581 INFO L93 Difference]: Finished difference Result 46 states and 91 transitions. [2021-10-04 18:26:52,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-04 18:26:52,581 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-10-04 18:26:52,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 18:26:52,583 INFO L225 Difference]: With dead ends: 46 [2021-10-04 18:26:52,583 INFO L226 Difference]: Without dead ends: 46 [2021-10-04 18:26:52,584 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 19.0ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-04 18:26:52,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-10-04 18:26:52,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 32. [2021-10-04 18:26:52,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 2.3225806451612905) internal successors, (72), 31 states have internal predecessors, (72), 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) [2021-10-04 18:26:52,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 72 transitions. [2021-10-04 18:26:52,593 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 72 transitions. Word has length 12 [2021-10-04 18:26:52,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 18:26:52,593 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 72 transitions. [2021-10-04 18:26:52,594 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 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) [2021-10-04 18:26:52,594 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 72 transitions. [2021-10-04 18:26:52,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-04 18:26:52,595 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 18:26:52,595 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-04 18:26:52,637 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 [2021-10-04 18:26:52,810 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 18:26:52,811 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-04 18:26:52,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 18:26:52,813 INFO L82 PathProgramCache]: Analyzing trace with hash 2076676924, now seen corresponding path program 1 times [2021-10-04 18:26:52,814 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 18:26:52,814 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763528190] [2021-10-04 18:26:52,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 18:26:52,815 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 18:26:52,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 18:26:52,933 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 18:26:52,934 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 18:26:52,935 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763528190] [2021-10-04 18:26:52,935 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763528190] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-04 18:26:52,937 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-04 18:26:52,937 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-04 18:26:52,937 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493253173] [2021-10-04 18:26:52,938 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-04 18:26:52,938 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 18:26:52,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-04 18:26:52,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-04 18:26:52,941 INFO L87 Difference]: Start difference. First operand 32 states and 72 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 18:26:52,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 18:26:52,974 INFO L93 Difference]: Finished difference Result 38 states and 75 transitions. [2021-10-04 18:26:52,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-04 18:26:52,974 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-10-04 18:26:52,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 18:26:52,976 INFO L225 Difference]: With dead ends: 38 [2021-10-04 18:26:52,979 INFO L226 Difference]: Without dead ends: 30 [2021-10-04 18:26:52,980 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.0ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-04 18:26:52,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-10-04 18:26:52,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2021-10-04 18:26:52,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 2.1724137931034484) internal successors, (63), 29 states have internal predecessors, (63), 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) [2021-10-04 18:26:52,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 63 transitions. [2021-10-04 18:26:52,993 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 63 transitions. Word has length 12 [2021-10-04 18:26:52,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 18:26:52,996 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 63 transitions. [2021-10-04 18:26:52,996 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 18:26:52,996 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 63 transitions. [2021-10-04 18:26:52,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-04 18:26:52,998 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 18:26:52,998 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-04 18:26:52,999 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-04 18:26:53,000 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-04 18:26:53,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 18:26:53,001 INFO L82 PathProgramCache]: Analyzing trace with hash -1274481726, now seen corresponding path program 2 times [2021-10-04 18:26:53,002 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 18:26:53,002 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603620233] [2021-10-04 18:26:53,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 18:26:53,004 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 18:26:53,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 18:26:53,089 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 18:26:53,090 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 18:26:53,090 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603620233] [2021-10-04 18:26:53,090 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603620233] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-04 18:26:53,090 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-04 18:26:53,090 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-04 18:26:53,091 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100927170] [2021-10-04 18:26:53,091 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-04 18:26:53,091 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 18:26:53,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-04 18:26:53,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-04 18:26:53,093 INFO L87 Difference]: Start difference. First operand 30 states and 63 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 18:26:53,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 18:26:53,116 INFO L93 Difference]: Finished difference Result 34 states and 73 transitions. [2021-10-04 18:26:53,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-04 18:26:53,117 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-10-04 18:26:53,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 18:26:53,118 INFO L225 Difference]: With dead ends: 34 [2021-10-04 18:26:53,118 INFO L226 Difference]: Without dead ends: 34 [2021-10-04 18:26:53,119 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.1ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-04 18:26:53,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-10-04 18:26:53,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2021-10-04 18:26:53,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 2.212121212121212) internal successors, (73), 33 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 18:26:53,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 73 transitions. [2021-10-04 18:26:53,129 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 73 transitions. Word has length 12 [2021-10-04 18:26:53,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 18:26:53,130 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 73 transitions. [2021-10-04 18:26:53,130 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 18:26:53,130 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 73 transitions. [2021-10-04 18:26:53,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-04 18:26:53,132 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 18:26:53,132 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-04 18:26:53,132 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-04 18:26:53,132 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-04 18:26:53,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 18:26:53,136 INFO L82 PathProgramCache]: Analyzing trace with hash -1387629462, now seen corresponding path program 1 times [2021-10-04 18:26:53,136 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 18:26:53,137 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270083253] [2021-10-04 18:26:53,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 18:26:53,137 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 18:26:53,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 18:26:53,306 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 18:26:53,307 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 18:26:53,307 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270083253] [2021-10-04 18:26:53,307 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270083253] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 18:26:53,307 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [200365645] [2021-10-04 18:26:53,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 18:26:53,308 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 18:26:53,308 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-04 18:26:53,318 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) [2021-10-04 18:26:53,340 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 [2021-10-04 18:26:53,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 18:26:53,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-04 18:26:53,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-04 18:26:53,549 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 18:26:53,550 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [200365645] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-04 18:26:53,550 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-04 18:26:53,550 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2021-10-04 18:26:53,551 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124071884] [2021-10-04 18:26:53,551 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-04 18:26:53,551 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 18:26:53,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-04 18:26:53,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-10-04 18:26:53,553 INFO L87 Difference]: Start difference. First operand 34 states and 73 transitions. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 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) [2021-10-04 18:26:53,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 18:26:53,574 INFO L93 Difference]: Finished difference Result 43 states and 88 transitions. [2021-10-04 18:26:53,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-04 18:26:53,575 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 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 [2021-10-04 18:26:53,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 18:26:53,576 INFO L225 Difference]: With dead ends: 43 [2021-10-04 18:26:53,577 INFO L226 Difference]: Without dead ends: 28 [2021-10-04 18:26:53,577 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 43.5ms TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-10-04 18:26:53,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-10-04 18:26:53,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-10-04 18:26:53,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 2.074074074074074) internal successors, (56), 27 states have internal predecessors, (56), 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) [2021-10-04 18:26:53,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 56 transitions. [2021-10-04 18:26:53,582 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 56 transitions. Word has length 13 [2021-10-04 18:26:53,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 18:26:53,583 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 56 transitions. [2021-10-04 18:26:53,583 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 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) [2021-10-04 18:26:53,584 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 56 transitions. [2021-10-04 18:26:53,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-04 18:26:53,584 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 18:26:53,585 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-04 18:26:53,627 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 [2021-10-04 18:26:53,800 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 [2021-10-04 18:26:53,801 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-04 18:26:53,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 18:26:53,802 INFO L82 PathProgramCache]: Analyzing trace with hash -443820816, now seen corresponding path program 2 times [2021-10-04 18:26:53,803 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 18:26:53,803 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006739465] [2021-10-04 18:26:53,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 18:26:53,804 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 18:26:53,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 18:26:53,931 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 18:26:53,931 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 18:26:53,932 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006739465] [2021-10-04 18:26:53,933 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2006739465] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 18:26:53,933 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [137502276] [2021-10-04 18:26:53,933 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-04 18:26:53,934 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 18:26:53,934 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-04 18:26:53,936 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) [2021-10-04 18:26:53,963 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 [2021-10-04 18:26:54,011 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-04 18:26:54,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-04 18:26:54,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-04 18:26:54,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-04 18:26:54,147 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 18:26:54,148 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [137502276] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 18:26:54,148 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-04 18:26:54,149 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3] total 8 [2021-10-04 18:26:54,149 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832883461] [2021-10-04 18:26:54,150 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-04 18:26:54,150 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 18:26:54,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-04 18:26:54,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-10-04 18:26:54,151 INFO L87 Difference]: Start difference. First operand 28 states and 56 transitions. Second operand has 9 states, 8 states have (on average 3.25) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 18:26:54,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 18:26:54,265 INFO L93 Difference]: Finished difference Result 63 states and 124 transitions. [2021-10-04 18:26:54,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-04 18:26:54,266 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.25) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-10-04 18:26:54,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 18:26:54,267 INFO L225 Difference]: With dead ends: 63 [2021-10-04 18:26:54,267 INFO L226 Difference]: Without dead ends: 46 [2021-10-04 18:26:54,268 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 101.5ms TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-10-04 18:26:54,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-10-04 18:26:54,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 34. [2021-10-04 18:26:54,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 2.272727272727273) internal successors, (75), 33 states have internal predecessors, (75), 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) [2021-10-04 18:26:54,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 75 transitions. [2021-10-04 18:26:54,275 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 75 transitions. Word has length 13 [2021-10-04 18:26:54,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 18:26:54,275 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 75 transitions. [2021-10-04 18:26:54,276 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.25) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 18:26:54,276 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 75 transitions. [2021-10-04 18:26:54,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-04 18:26:54,277 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 18:26:54,277 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-04 18:26:54,315 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-10-04 18:26:54,491 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 [2021-10-04 18:26:54,492 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-04 18:26:54,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 18:26:54,493 INFO L82 PathProgramCache]: Analyzing trace with hash -685444920, now seen corresponding path program 3 times [2021-10-04 18:26:54,494 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 18:26:54,495 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448686398] [2021-10-04 18:26:54,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 18:26:54,495 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 18:26:54,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 18:26:54,597 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 18:26:54,597 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 18:26:54,598 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448686398] [2021-10-04 18:26:54,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448686398] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 18:26:54,598 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [481020365] [2021-10-04 18:26:54,598 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-04 18:26:54,599 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 18:26:54,599 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-04 18:26:54,600 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) [2021-10-04 18:26:54,619 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 [2021-10-04 18:26:54,665 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-04 18:26:54,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-04 18:26:54,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-04 18:26:54,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-04 18:26:54,782 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 18:26:54,782 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [481020365] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 18:26:54,783 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-04 18:26:54,783 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3] total 8 [2021-10-04 18:26:54,783 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135364629] [2021-10-04 18:26:54,784 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-04 18:26:54,784 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 18:26:54,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-04 18:26:54,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-10-04 18:26:54,785 INFO L87 Difference]: Start difference. First operand 34 states and 75 transitions. Second operand has 9 states, 8 states have (on average 3.25) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 18:26:54,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 18:26:54,888 INFO L93 Difference]: Finished difference Result 55 states and 123 transitions. [2021-10-04 18:26:54,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-04 18:26:54,889 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.25) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-10-04 18:26:54,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 18:26:54,891 INFO L225 Difference]: With dead ends: 55 [2021-10-04 18:26:54,891 INFO L226 Difference]: Without dead ends: 50 [2021-10-04 18:26:54,893 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 100.0ms TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-10-04 18:26:54,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-10-04 18:26:54,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 36. [2021-10-04 18:26:54,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 2.2285714285714286) internal successors, (78), 35 states have internal predecessors, (78), 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) [2021-10-04 18:26:54,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 78 transitions. [2021-10-04 18:26:54,911 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 78 transitions. Word has length 13 [2021-10-04 18:26:54,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 18:26:54,912 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 78 transitions. [2021-10-04 18:26:54,912 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.25) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 18:26:54,912 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 78 transitions. [2021-10-04 18:26:54,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-04 18:26:54,915 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 18:26:54,915 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-04 18:26:54,950 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 [2021-10-04 18:26:55,128 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 [2021-10-04 18:26:55,129 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-04 18:26:55,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 18:26:55,130 INFO L82 PathProgramCache]: Analyzing trace with hash 154708690, now seen corresponding path program 4 times [2021-10-04 18:26:55,130 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 18:26:55,131 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474962309] [2021-10-04 18:26:55,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 18:26:55,131 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 18:26:55,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 18:26:55,189 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 18:26:55,189 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 18:26:55,189 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474962309] [2021-10-04 18:26:55,189 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474962309] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 18:26:55,189 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1816047664] [2021-10-04 18:26:55,190 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-04 18:26:55,190 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 18:26:55,190 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-04 18:26:55,199 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) [2021-10-04 18:26:55,210 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 [2021-10-04 18:26:55,277 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-04 18:26:55,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-04 18:26:55,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-04 18:26:55,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-04 18:26:55,385 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 18:26:55,385 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1816047664] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 18:26:55,385 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-04 18:26:55,385 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-10-04 18:26:55,385 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225978897] [2021-10-04 18:26:55,386 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-04 18:26:55,386 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 18:26:55,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-04 18:26:55,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-10-04 18:26:55,387 INFO L87 Difference]: Start difference. First operand 36 states and 78 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 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) [2021-10-04 18:26:55,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 18:26:55,460 INFO L93 Difference]: Finished difference Result 44 states and 94 transitions. [2021-10-04 18:26:55,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-04 18:26:55,460 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 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 14 [2021-10-04 18:26:55,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 18:26:55,461 INFO L225 Difference]: With dead ends: 44 [2021-10-04 18:26:55,461 INFO L226 Difference]: Without dead ends: 40 [2021-10-04 18:26:55,462 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 61.6ms TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-10-04 18:26:55,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-10-04 18:26:55,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 30. [2021-10-04 18:26:55,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 2.1379310344827585) internal successors, (62), 29 states have internal predecessors, (62), 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) [2021-10-04 18:26:55,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 62 transitions. [2021-10-04 18:26:55,466 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 62 transitions. Word has length 14 [2021-10-04 18:26:55,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 18:26:55,466 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 62 transitions. [2021-10-04 18:26:55,466 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 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) [2021-10-04 18:26:55,466 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 62 transitions. [2021-10-04 18:26:55,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-04 18:26:55,467 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 18:26:55,467 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-04 18:26:55,501 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 [2021-10-04 18:26:55,680 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 [2021-10-04 18:26:55,681 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-04 18:26:55,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 18:26:55,682 INFO L82 PathProgramCache]: Analyzing trace with hash 395421528, now seen corresponding path program 5 times [2021-10-04 18:26:55,682 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 18:26:55,683 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141893661] [2021-10-04 18:26:55,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 18:26:55,683 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 18:26:55,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 18:26:55,742 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 18:26:55,742 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 18:26:55,742 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141893661] [2021-10-04 18:26:55,742 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141893661] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 18:26:55,743 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506726563] [2021-10-04 18:26:55,743 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-04 18:26:55,743 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 18:26:55,743 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-04 18:26:55,744 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) [2021-10-04 18:26:55,751 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 [2021-10-04 18:26:55,838 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-04 18:26:55,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-04 18:26:55,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-04 18:26:55,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-04 18:26:55,938 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 18:26:55,938 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [506726563] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 18:26:55,938 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-04 18:26:55,938 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-10-04 18:26:55,939 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727991185] [2021-10-04 18:26:55,939 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-04 18:26:55,939 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 18:26:55,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-04 18:26:55,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-10-04 18:26:55,940 INFO L87 Difference]: Start difference. First operand 30 states and 62 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 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) [2021-10-04 18:26:55,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 18:26:55,988 INFO L93 Difference]: Finished difference Result 48 states and 93 transitions. [2021-10-04 18:26:55,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-04 18:26:55,988 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 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 14 [2021-10-04 18:26:55,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 18:26:55,989 INFO L225 Difference]: With dead ends: 48 [2021-10-04 18:26:55,989 INFO L226 Difference]: Without dead ends: 46 [2021-10-04 18:26:55,990 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 45.4ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-10-04 18:26:55,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-10-04 18:26:55,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 34. [2021-10-04 18:26:55,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 2.1818181818181817) internal successors, (72), 33 states have internal predecessors, (72), 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) [2021-10-04 18:26:55,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 72 transitions. [2021-10-04 18:26:55,994 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 72 transitions. Word has length 14 [2021-10-04 18:26:55,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 18:26:55,994 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 72 transitions. [2021-10-04 18:26:55,995 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 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) [2021-10-04 18:26:55,995 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 72 transitions. [2021-10-04 18:26:55,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-04 18:26:55,995 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 18:26:55,995 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-04 18:26:56,036 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 [2021-10-04 18:26:56,209 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 [2021-10-04 18:26:56,210 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-04 18:26:56,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 18:26:56,211 INFO L82 PathProgramCache]: Analyzing trace with hash 1453002320, now seen corresponding path program 6 times [2021-10-04 18:26:56,212 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 18:26:56,212 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294595196] [2021-10-04 18:26:56,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 18:26:56,213 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 18:26:56,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 18:26:56,274 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 18:26:56,274 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 18:26:56,274 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294595196] [2021-10-04 18:26:56,275 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294595196] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 18:26:56,275 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2100713699] [2021-10-04 18:26:56,275 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-04 18:26:56,275 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 18:26:56,275 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-04 18:26:56,286 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) [2021-10-04 18:26:56,295 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 [2021-10-04 18:26:56,371 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-10-04 18:26:56,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-04 18:26:56,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-04 18:26:56,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-04 18:26:56,463 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 18:26:56,463 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2100713699] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 18:26:56,463 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-04 18:26:56,463 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-10-04 18:26:56,464 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620715511] [2021-10-04 18:26:56,464 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-04 18:26:56,464 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 18:26:56,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-04 18:26:56,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-10-04 18:26:56,465 INFO L87 Difference]: Start difference. First operand 34 states and 72 transitions. Second operand has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 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) [2021-10-04 18:26:56,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 18:26:56,532 INFO L93 Difference]: Finished difference Result 48 states and 105 transitions. [2021-10-04 18:26:56,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-04 18:26:56,532 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 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 14 [2021-10-04 18:26:56,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 18:26:56,533 INFO L225 Difference]: With dead ends: 48 [2021-10-04 18:26:56,533 INFO L226 Difference]: Without dead ends: 48 [2021-10-04 18:26:56,534 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 58.7ms TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-10-04 18:26:56,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-10-04 18:26:56,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 38. [2021-10-04 18:26:56,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 2.324324324324324) internal successors, (86), 37 states have internal predecessors, (86), 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) [2021-10-04 18:26:56,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 86 transitions. [2021-10-04 18:26:56,538 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 86 transitions. Word has length 14 [2021-10-04 18:26:56,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 18:26:56,539 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 86 transitions. [2021-10-04 18:26:56,539 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 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) [2021-10-04 18:26:56,539 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 86 transitions. [2021-10-04 18:26:56,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-04 18:26:56,540 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 18:26:56,540 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-04 18:26:56,582 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 [2021-10-04 18:26:56,754 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 [2021-10-04 18:26:56,754 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-04 18:26:56,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 18:26:56,755 INFO L82 PathProgramCache]: Analyzing trace with hash 1269162208, now seen corresponding path program 7 times [2021-10-04 18:26:56,755 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 18:26:56,755 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553479408] [2021-10-04 18:26:56,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 18:26:56,755 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 18:26:56,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 18:26:56,813 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 18:26:56,813 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 18:26:56,814 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553479408] [2021-10-04 18:26:56,814 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553479408] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 18:26:56,814 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [328695585] [2021-10-04 18:26:56,815 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-04 18:26:56,815 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 18:26:56,815 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-04 18:26:56,816 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) [2021-10-04 18:26:56,829 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 [2021-10-04 18:26:56,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 18:26:56,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-04 18:26:56,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-04 18:26:57,041 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-04 18:26:57,041 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [328695585] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-04 18:26:57,042 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-04 18:26:57,042 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 10 [2021-10-04 18:26:57,042 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787174903] [2021-10-04 18:26:57,043 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-04 18:26:57,043 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 18:26:57,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-04 18:26:57,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-10-04 18:26:57,044 INFO L87 Difference]: Start difference. First operand 38 states and 86 transitions. Second operand has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 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) [2021-10-04 18:26:57,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 18:26:57,062 INFO L93 Difference]: Finished difference Result 41 states and 93 transitions. [2021-10-04 18:26:57,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-04 18:26:57,063 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 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 14 [2021-10-04 18:26:57,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 18:26:57,064 INFO L225 Difference]: With dead ends: 41 [2021-10-04 18:26:57,064 INFO L226 Difference]: Without dead ends: 0 [2021-10-04 18:26:57,064 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 51.7ms TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-10-04 18:26:57,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-04 18:26:57,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-04 18:26:57,065 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) [2021-10-04 18:26:57,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-04 18:26:57,065 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 14 [2021-10-04 18:26:57,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 18:26:57,066 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-04 18:26:57,066 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 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) [2021-10-04 18:26:57,066 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-04 18:26:57,066 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-04 18:26:57,069 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-04 18:26:57,070 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATION [2021-10-04 18:26:57,070 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATION [2021-10-04 18:26:57,109 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 [2021-10-04 18:26:57,284 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 [2021-10-04 18:26:57,291 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-10-04 18:26:57,291 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-04 18:26:57,293 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.10 06:26:57 BasicIcfg [2021-10-04 18:26:57,293 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-04 18:26:57,294 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-04 18:26:57,294 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-04 18:26:57,294 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-04 18:26:57,295 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.10 06:26:49" (3/4) ... [2021-10-04 18:26:57,298 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-04 18:26:57,305 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure thread1 [2021-10-04 18:26:57,305 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure thread2 [2021-10-04 18:26:57,311 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 12 nodes and edges [2021-10-04 18:26:57,311 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-10-04 18:26:57,311 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-10-04 18:26:57,351 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-10-04 18:26:57,352 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-04 18:26:57,353 INFO L168 Benchmark]: Toolchain (without parser) took 8832.98 ms. Allocated memory was 48.2 MB in the beginning and 94.4 MB in the end (delta: 46.1 MB). Free memory was 23.9 MB in the beginning and 53.4 MB in the end (delta: -29.5 MB). Peak memory consumption was 16.9 MB. Max. memory is 16.1 GB. [2021-10-04 18:26:57,354 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 48.2 MB. Free memory is still 26.9 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-04 18:26:57,354 INFO L168 Benchmark]: CACSL2BoogieTranslator took 262.60 ms. Allocated memory was 48.2 MB in the beginning and 62.9 MB in the end (delta: 14.7 MB). Free memory was 23.6 MB in the beginning and 39.9 MB in the end (delta: -16.3 MB). Peak memory consumption was 5.4 MB. Max. memory is 16.1 GB. [2021-10-04 18:26:57,355 INFO L168 Benchmark]: Boogie Procedure Inliner took 44.77 ms. Allocated memory is still 62.9 MB. Free memory was 39.9 MB in the beginning and 38.4 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-04 18:26:57,355 INFO L168 Benchmark]: Boogie Preprocessor took 62.71 ms. Allocated memory is still 62.9 MB. Free memory was 38.4 MB in the beginning and 37.4 MB in the end (delta: 1.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-04 18:26:57,355 INFO L168 Benchmark]: RCFGBuilder took 512.40 ms. Allocated memory is still 62.9 MB. Free memory was 37.2 MB in the beginning and 42.2 MB in the end (delta: -4.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-04 18:26:57,356 INFO L168 Benchmark]: TraceAbstraction took 7873.47 ms. Allocated memory was 62.9 MB in the beginning and 94.4 MB in the end (delta: 31.5 MB). Free memory was 41.6 MB in the beginning and 55.9 MB in the end (delta: -14.3 MB). Peak memory consumption was 16.0 MB. Max. memory is 16.1 GB. [2021-10-04 18:26:57,356 INFO L168 Benchmark]: Witness Printer took 58.11 ms. Allocated memory is still 94.4 MB. Free memory was 55.9 MB in the beginning and 53.4 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-04 18:26:57,359 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 48.2 MB. Free memory is still 26.9 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 262.60 ms. Allocated memory was 48.2 MB in the beginning and 62.9 MB in the end (delta: 14.7 MB). Free memory was 23.6 MB in the beginning and 39.9 MB in the end (delta: -16.3 MB). Peak memory consumption was 5.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 44.77 ms. Allocated memory is still 62.9 MB. Free memory was 39.9 MB in the beginning and 38.4 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 62.71 ms. Allocated memory is still 62.9 MB. Free memory was 38.4 MB in the beginning and 37.4 MB in the end (delta: 1.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 512.40 ms. Allocated memory is still 62.9 MB. Free memory was 37.2 MB in the beginning and 42.2 MB in the end (delta: -4.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * TraceAbstraction took 7873.47 ms. Allocated memory was 62.9 MB in the beginning and 94.4 MB in the end (delta: 31.5 MB). Free memory was 41.6 MB in the beginning and 55.9 MB in the end (delta: -14.3 MB). Peak memory consumption was 16.0 MB. Max. memory is 16.1 GB. * Witness Printer took 58.11 ms. Allocated memory is still 94.4 MB. Free memory was 55.9 MB in the beginning and 53.4 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 2062.4ms, 68 PlacesBefore, 21 PlacesAfterwards, 67 TransitionsBefore, 16 TransitionsAfterwards, 308 CoEnabledTransitionPairs, 6 FixpointIterations, 38 TrivialSequentialCompositions, 13 ConcurrentSequentialCompositions, 3 TrivialYvCompositions, 4 ConcurrentYvCompositions, 4 ChoiceCompositions, 62 TotalNumberOfCompositions, 341 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 341, positive: 341, positive conditional: 0, positive unconditional: 341, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 222, positive: 222, positive conditional: 0, positive unconditional: 222, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 222, positive: 222, positive conditional: 0, positive unconditional: 222, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 341, positive: 119, positive conditional: 0, positive unconditional: 119, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 222, unknown conditional: 0, unknown unconditional: 222] , Statistics on independence cache: Total cache size (in pairs): 18, Positive cache size: 18, Positive conditional cache size: 0, Positive unconditional cache size: 18, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0 - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 45]: 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, 76 locations, 3 error locations. Started 1 CEGAR loops. OverallTime: 7689.0ms, OverallIterations: 11, TraceHistogramMax: 2, EmptinessCheckTime: 21.0ms, AutomataDifference: 647.5ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 2151.7ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 164 SDtfs, 215 SDslu, 305 SDs, 0 SdLazy, 344 SolverSat, 56 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 256.2ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 163 GetRequests, 88 SyntacticMatches, 2 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 498.6ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=38occurred in iteration=10, InterpolantAutomatonStates: 64, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 96.9ms AutomataMinimizationTime, 11 MinimizatonAttempts, 72 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 78.7ms SsaConstructionTime, 440.5ms SatisfiabilityAnalysisTime, 1740.4ms InterpolantComputationTime, 249 NumberOfCodeBlocks, 249 NumberOfCodeBlocksAsserted, 24 NumberOfCheckSat, 230 ConstructedInterpolants, 0 QuantifiedInterpolants, 1060 SizeOfPredicates, 15 NumberOfNonLiveVariables, 585 ConjunctsInSsa, 88 ConjunctsInUnsatCore, 19 InterpolantComputations, 5 PerfectInterpolantSequences, 24/48 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! [2021-10-04 18:26:57,407 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...