./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/parallel-misc-3.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c503be2a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/weaver/parallel-misc-3.wvr.c -s /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 24f3c8efd7912a35b8049f552a6679ec95fecb2c ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-c503be2 [2021-10-13 17:45:51,030 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 17:45:51,033 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 17:45:51,068 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-13 17:45:51,068 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-13 17:45:51,070 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-13 17:45:51,072 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-13 17:45:51,075 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-13 17:45:51,077 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-13 17:45:51,079 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-13 17:45:51,080 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-13 17:45:51,082 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-13 17:45:51,082 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 17:45:51,084 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 17:45:51,093 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 17:45:51,096 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 17:45:51,097 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 17:45:51,102 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 17:45:51,107 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 17:45:51,110 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 17:45:51,117 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 17:45:51,118 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 17:45:51,120 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 17:45:51,124 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 17:45:51,132 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-13 17:45:51,133 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-13 17:45:51,134 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-13 17:45:51,135 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-13 17:45:51,140 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-13 17:45:51,141 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-13 17:45:51,142 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-13 17:45:51,143 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-13 17:45:51,145 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-13 17:45:51,146 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-13 17:45:51,148 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-13 17:45:51,148 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-13 17:45:51,150 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-13 17:45:51,150 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-13 17:45:51,150 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 17:45:51,153 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 17:45:51,154 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 17:45:51,161 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-13 17:45:51,212 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 17:45:51,212 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 17:45:51,213 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-13 17:45:51,214 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-13 17:45:51,216 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-13 17:45:51,217 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-13 17:45:51,217 INFO L138 SettingsManager]: * Use SBE=true [2021-10-13 17:45:51,217 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 17:45:51,218 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 17:45:51,218 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-13 17:45:51,222 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 17:45:51,222 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 17:45:51,222 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-13 17:45:51,222 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-13 17:45:51,223 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-13 17:45:51,223 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 17:45:51,223 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-13 17:45:51,223 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 17:45:51,223 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-13 17:45:51,223 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 17:45:51,224 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-13 17:45:51,224 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-13 17:45:51,224 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 17:45:51,224 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 17:45:51,224 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-13 17:45:51,225 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-13 17:45:51,225 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-13 17:45:51,225 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-13 17:45:51,225 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-13 17:45:51,225 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 17:45:51,225 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 24f3c8efd7912a35b8049f552a6679ec95fecb2c [2021-10-13 17:45:51,640 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 17:45:51,679 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 17:45:51,682 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 17:45:51,684 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 17:45:51,685 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 17:45:51,686 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/parallel-misc-3.wvr.c [2021-10-13 17:45:51,772 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9c9de42b0/e0d32dc36b374ec49c25974178e8ce88/FLAG91acce8de [2021-10-13 17:45:52,427 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 17:45:52,428 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/releaseScripts/default/sv-benchmarks/c/weaver/parallel-misc-3.wvr.c [2021-10-13 17:45:52,439 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9c9de42b0/e0d32dc36b374ec49c25974178e8ce88/FLAG91acce8de [2021-10-13 17:45:52,807 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9c9de42b0/e0d32dc36b374ec49c25974178e8ce88 [2021-10-13 17:45:52,814 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 17:45:52,821 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-13 17:45:52,835 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 17:45:52,835 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 17:45:52,839 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 17:45:52,841 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 05:45:52" (1/1) ... [2021-10-13 17:45:52,849 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3b3eb2cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:45:52, skipping insertion in model container [2021-10-13 17:45:52,850 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 05:45:52" (1/1) ... [2021-10-13 17:45:52,863 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 17:45:52,885 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 17:45:53,085 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-2/releaseScripts/default/sv-benchmarks/c/weaver/parallel-misc-3.wvr.c[2282,2295] [2021-10-13 17:45:53,093 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 17:45:53,115 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 17:45:53,165 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-2/releaseScripts/default/sv-benchmarks/c/weaver/parallel-misc-3.wvr.c[2282,2295] [2021-10-13 17:45:53,169 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 17:45:53,193 INFO L208 MainTranslator]: Completed translation [2021-10-13 17:45:53,194 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:45:53 WrapperNode [2021-10-13 17:45:53,194 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 17:45:53,196 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-13 17:45:53,206 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-13 17:45:53,207 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-13 17:45:53,220 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:45:53" (1/1) ... [2021-10-13 17:45:53,244 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:45:53" (1/1) ... [2021-10-13 17:45:53,280 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-13 17:45:53,282 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 17:45:53,282 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 17:45:53,282 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 17:45:53,294 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:45:53" (1/1) ... [2021-10-13 17:45:53,294 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:45:53" (1/1) ... [2021-10-13 17:45:53,301 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:45:53" (1/1) ... [2021-10-13 17:45:53,302 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:45:53" (1/1) ... [2021-10-13 17:45:53,323 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:45:53" (1/1) ... [2021-10-13 17:45:53,333 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:45:53" (1/1) ... [2021-10-13 17:45:53,345 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:45:53" (1/1) ... [2021-10-13 17:45:53,352 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 17:45:53,353 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 17:45:53,354 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 17:45:53,354 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 17:45:53,355 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:45:53" (1/1) ... [2021-10-13 17:45:53,367 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 17:45:53,385 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 17:45:53,406 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) [2021-10-13 17:45:53,426 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 [2021-10-13 17:45:53,490 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-10-13 17:45:53,490 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-10-13 17:45:53,491 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-10-13 17:45:53,491 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-10-13 17:45:53,491 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-13 17:45:53,491 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-13 17:45:53,491 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-13 17:45:53,491 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-10-13 17:45:53,492 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-10-13 17:45:53,492 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 17:45:53,492 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 17:45:53,492 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-13 17:45:53,492 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-13 17:45:53,495 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-10-13 17:45:53,963 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 17:45:53,964 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2021-10-13 17:45:53,969 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 05:45:53 BoogieIcfgContainer [2021-10-13 17:45:53,969 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 17:45:53,974 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-13 17:45:53,974 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-13 17:45:53,981 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-13 17:45:53,981 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 05:45:52" (1/3) ... [2021-10-13 17:45:53,982 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@179d25ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 05:45:53, skipping insertion in model container [2021-10-13 17:45:53,982 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:45:53" (2/3) ... [2021-10-13 17:45:53,983 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@179d25ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 05:45:53, skipping insertion in model container [2021-10-13 17:45:53,983 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 05:45:53" (3/3) ... [2021-10-13 17:45:53,989 INFO L111 eAbstractionObserver]: Analyzing ICFG parallel-misc-3.wvr.c [2021-10-13 17:45:53,998 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-10-13 17:45:53,998 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-13 17:45:53,998 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-13 17:45:53,998 INFO L516 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-10-13 17:45:54,056 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 17:45:54,056 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 17:45:54,057 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 17:45:54,057 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 17:45:54,057 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 17:45:54,058 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 17:45:54,058 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 17:45:54,058 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 17:45:54,059 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 17:45:54,061 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 17:45:54,062 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 17:45:54,062 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 17:45:54,062 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 17:45:54,063 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 17:45:54,063 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 17:45:54,063 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 17:45:54,065 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 17:45:54,065 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 17:45:54,065 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 17:45:54,066 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 17:45:54,068 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 17:45:54,069 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 17:45:54,069 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 17:45:54,069 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 17:45:54,069 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 17:45:54,070 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 17:45:54,070 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 17:45:54,070 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 17:45:54,086 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 17:45:54,087 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 17:45:54,087 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 17:45:54,087 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 17:45:54,087 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 17:45:54,093 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 17:45:54,094 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 17:45:54,094 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 17:45:54,123 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-10-13 17:45:54,202 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-13 17:45:54,226 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 [2021-10-13 17:45:54,227 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-10-13 17:45:54,254 INFO L118 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-10-13 17:45:54,270 INFO L133 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 85 places, 89 transitions, 194 flow [2021-10-13 17:45:54,275 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 85 places, 89 transitions, 194 flow [2021-10-13 17:45:54,277 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 85 places, 89 transitions, 194 flow [2021-10-13 17:45:54,369 INFO L129 PetriNetUnfolder]: 11/87 cut-off events. [2021-10-13 17:45:54,369 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-10-13 17:45:54,379 INFO L84 FinitePrefix]: Finished finitePrefix Result has 96 conditions, 87 events. 11/87 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 91 event pairs, 0 based on Foata normal form. 0/75 useless extension candidates. Maximal degree in co-relation 48. Up to 4 conditions per place. [2021-10-13 17:45:54,385 INFO L116 LiptonReduction]: Number of co-enabled transitions 1088 [2021-10-13 17:45:58,418 INFO L131 LiptonReduction]: Checked pairs total: 1018 [2021-10-13 17:45:58,418 INFO L133 LiptonReduction]: Total number of compositions: 84 [2021-10-13 17:45:58,428 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 21 places, 16 transitions, 48 flow [2021-10-13 17:45:58,439 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) [2021-10-13 17:45:58,441 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) [2021-10-13 17:45:58,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-13 17:45:58,447 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 17:45:58,447 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 17:45:58,448 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 17:45:58,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 17:45:58,454 INFO L82 PathProgramCache]: Analyzing trace with hash -677123789, now seen corresponding path program 1 times [2021-10-13 17:45:58,465 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 17:45:58,465 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936261272] [2021-10-13 17:45:58,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 17:45:58,467 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 17:45:58,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 17:45:58,685 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 17:45:58,686 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 17:45:58,686 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936261272] [2021-10-13 17:45:58,687 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1936261272] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 17:45:58,687 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 17:45:58,687 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-13 17:45:58,691 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602987074] [2021-10-13 17:45:58,698 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 17:45:58,699 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 17:45:58,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 17:45:58,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 17:45:58,727 INFO L87 Difference]: Start difference. First operand has 20 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 17:45:58,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 17:45:58,754 INFO L93 Difference]: Finished difference Result 26 states and 54 transitions. [2021-10-13 17:45:58,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 17:45:58,757 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-10-13 17:45:58,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 17:45:58,768 INFO L225 Difference]: With dead ends: 26 [2021-10-13 17:45:58,768 INFO L226 Difference]: Without dead ends: 26 [2021-10-13 17:45:58,769 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 17:45:58,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-10-13 17:45:58,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2021-10-13 17:45:58,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 17:45:58,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 54 transitions. [2021-10-13 17:45:58,809 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 54 transitions. Word has length 11 [2021-10-13 17:45:58,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 17:45:58,810 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 54 transitions. [2021-10-13 17:45:58,810 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 17:45:58,811 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 54 transitions. [2021-10-13 17:45:58,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-13 17:45:58,812 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 17:45:58,812 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 17:45:58,812 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-13 17:45:58,813 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 17:45:58,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 17:45:58,814 INFO L82 PathProgramCache]: Analyzing trace with hash -1250314929, now seen corresponding path program 1 times [2021-10-13 17:45:58,814 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 17:45:58,814 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564985515] [2021-10-13 17:45:58,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 17:45:58,815 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 17:45:58,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 17:45:58,882 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 17:45:58,883 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 17:45:58,883 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564985515] [2021-10-13 17:45:58,884 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1564985515] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 17:45:58,884 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 17:45:58,884 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-13 17:45:58,885 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266634700] [2021-10-13 17:45:58,886 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 17:45:58,887 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 17:45:58,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 17:45:58,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 17:45:58,888 INFO L87 Difference]: Start difference. First operand 26 states and 54 transitions. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 17:45:58,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 17:45:58,897 INFO L93 Difference]: Finished difference Result 34 states and 73 transitions. [2021-10-13 17:45:58,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 17:45:58,897 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-10-13 17:45:58,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 17:45:58,899 INFO L225 Difference]: With dead ends: 34 [2021-10-13 17:45:58,899 INFO L226 Difference]: Without dead ends: 34 [2021-10-13 17:45:58,900 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 17:45:58,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-10-13 17:45:58,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2021-10-13 17:45:58,906 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) [2021-10-13 17:45:58,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 73 transitions. [2021-10-13 17:45:58,908 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 73 transitions. Word has length 12 [2021-10-13 17:45:58,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 17:45:58,909 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 73 transitions. [2021-10-13 17:45:58,909 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 17:45:58,909 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 73 transitions. [2021-10-13 17:45:58,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-13 17:45:58,911 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 17:45:58,911 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 17:45:58,911 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-13 17:45:58,912 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 17:45:58,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 17:45:58,912 INFO L82 PathProgramCache]: Analyzing trace with hash -866148813, now seen corresponding path program 1 times [2021-10-13 17:45:58,913 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 17:45:58,913 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786641347] [2021-10-13 17:45:58,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 17:45:58,914 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 17:45:59,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 17:45:59,134 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 17:45:59,134 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 17:45:59,134 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786641347] [2021-10-13 17:45:59,134 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786641347] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 17:45:59,135 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1903060200] [2021-10-13 17:45:59,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 17:45:59,139 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 17:45:59,140 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 17:45:59,148 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) [2021-10-13 17:45:59,155 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 [2021-10-13 17:45:59,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 17:45:59,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-13 17:45:59,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 17:45:59,496 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 17:45:59,497 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1903060200] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 17:45:59,497 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 17:45:59,497 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2021-10-13 17:45:59,499 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642066272] [2021-10-13 17:45:59,500 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 17:45:59,500 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 17:45:59,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 17:45:59,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-13 17:45:59,502 INFO L87 Difference]: Start difference. First operand 34 states and 73 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 17:45:59,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 17:45:59,618 INFO L93 Difference]: Finished difference Result 52 states and 116 transitions. [2021-10-13 17:45:59,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-13 17:45:59,619 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-10-13 17:45:59,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 17:45:59,621 INFO L225 Difference]: With dead ends: 52 [2021-10-13 17:45:59,621 INFO L226 Difference]: Without dead ends: 52 [2021-10-13 17:45:59,621 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 52.1ms TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-10-13 17:45:59,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-10-13 17:45:59,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2021-10-13 17:45:59,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 2.2745098039215685) internal successors, (116), 51 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 17:45:59,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 116 transitions. [2021-10-13 17:45:59,632 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 116 transitions. Word has length 13 [2021-10-13 17:45:59,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 17:45:59,632 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 116 transitions. [2021-10-13 17:45:59,633 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 17:45:59,633 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 116 transitions. [2021-10-13 17:45:59,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-13 17:45:59,634 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 17:45:59,635 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 17:45:59,679 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 [2021-10-13 17:45:59,848 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 17:45:59,849 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 17:45:59,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 17:45:59,849 INFO L82 PathProgramCache]: Analyzing trace with hash -383041135, now seen corresponding path program 2 times [2021-10-13 17:45:59,849 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 17:45:59,850 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471531951] [2021-10-13 17:45:59,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 17:45:59,850 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 17:45:59,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 17:46:00,342 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 17:46:00,343 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 17:46:00,343 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471531951] [2021-10-13 17:46:00,344 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1471531951] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 17:46:00,345 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [291725189] [2021-10-13 17:46:00,345 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 17:46:00,345 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 17:46:00,346 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 17:46:00,350 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) [2021-10-13 17:46:00,374 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 [2021-10-13 17:46:00,434 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 17:46:00,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 17:46:00,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 22 conjunts are in the unsatisfiable core [2021-10-13 17:46:00,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 17:46:00,873 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 17:46:00,873 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [291725189] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 17:46:00,873 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 17:46:00,874 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-10-13 17:46:00,874 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783139983] [2021-10-13 17:46:00,875 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-13 17:46:00,875 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 17:46:00,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-13 17:46:00,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-10-13 17:46:00,877 INFO L87 Difference]: Start difference. First operand 52 states and 116 transitions. Second operand has 13 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 17:46:01,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 17:46:01,023 INFO L93 Difference]: Finished difference Result 99 states and 221 transitions. [2021-10-13 17:46:01,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-13 17:46:01,025 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-10-13 17:46:01,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 17:46:01,032 INFO L225 Difference]: With dead ends: 99 [2021-10-13 17:46:01,034 INFO L226 Difference]: Without dead ends: 94 [2021-10-13 17:46:01,035 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 167.3ms TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-10-13 17:46:01,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-10-13 17:46:01,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 80. [2021-10-13 17:46:01,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 2.3797468354430378) internal successors, (188), 79 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 17:46:01,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 188 transitions. [2021-10-13 17:46:01,051 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 188 transitions. Word has length 15 [2021-10-13 17:46:01,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 17:46:01,052 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 188 transitions. [2021-10-13 17:46:01,052 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 17:46:01,052 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 188 transitions. [2021-10-13 17:46:01,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-13 17:46:01,054 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 17:46:01,054 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 17:46:01,079 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 [2021-10-13 17:46:01,261 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 17:46:01,262 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 17:46:01,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 17:46:01,263 INFO L82 PathProgramCache]: Analyzing trace with hash -20914379, now seen corresponding path program 3 times [2021-10-13 17:46:01,265 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 17:46:01,266 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010409160] [2021-10-13 17:46:01,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 17:46:01,266 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 17:46:01,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 17:46:01,632 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 17:46:01,632 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 17:46:01,633 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010409160] [2021-10-13 17:46:01,633 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1010409160] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 17:46:01,633 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [201616040] [2021-10-13 17:46:01,634 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 17:46:01,634 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 17:46:01,634 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 17:46:01,635 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) [2021-10-13 17:46:01,652 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 [2021-10-13 17:46:01,720 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-13 17:46:01,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 17:46:01,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 20 conjunts are in the unsatisfiable core [2021-10-13 17:46:01,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 17:46:02,155 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 17:46:02,156 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [201616040] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 17:46:02,156 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 17:46:02,157 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 10 [2021-10-13 17:46:02,157 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201741404] [2021-10-13 17:46:02,158 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-13 17:46:02,159 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 17:46:02,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-13 17:46:02,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-10-13 17:46:02,167 INFO L87 Difference]: Start difference. First operand 80 states and 188 transitions. Second operand has 12 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 17:46:02,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 17:46:02,326 INFO L93 Difference]: Finished difference Result 198 states and 454 transitions. [2021-10-13 17:46:02,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-13 17:46:02,326 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-10-13 17:46:02,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 17:46:02,330 INFO L225 Difference]: With dead ends: 198 [2021-10-13 17:46:02,332 INFO L226 Difference]: Without dead ends: 188 [2021-10-13 17:46:02,333 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 126.1ms TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-10-13 17:46:02,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2021-10-13 17:46:02,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 124. [2021-10-13 17:46:02,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 2.5772357723577235) internal successors, (317), 123 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 17:46:02,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 317 transitions. [2021-10-13 17:46:02,371 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 317 transitions. Word has length 15 [2021-10-13 17:46:02,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 17:46:02,372 INFO L470 AbstractCegarLoop]: Abstraction has 124 states and 317 transitions. [2021-10-13 17:46:02,374 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 17:46:02,374 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 317 transitions. [2021-10-13 17:46:02,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-13 17:46:02,378 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 17:46:02,378 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 17:46:02,407 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-10-13 17:46:02,592 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 17:46:02,594 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 17:46:02,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 17:46:02,595 INFO L82 PathProgramCache]: Analyzing trace with hash -1093999759, now seen corresponding path program 4 times [2021-10-13 17:46:02,596 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 17:46:02,596 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743544690] [2021-10-13 17:46:02,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 17:46:02,596 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 17:46:02,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 17:46:03,097 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 17:46:03,097 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 17:46:03,098 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743544690] [2021-10-13 17:46:03,098 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1743544690] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 17:46:03,098 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [53331419] [2021-10-13 17:46:03,098 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-13 17:46:03,099 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 17:46:03,099 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 17:46:03,100 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) [2021-10-13 17:46:03,106 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 [2021-10-13 17:46:03,239 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-13 17:46:03,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 17:46:03,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 20 conjunts are in the unsatisfiable core [2021-10-13 17:46:03,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 17:46:03,708 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 17:46:03,709 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [53331419] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 17:46:03,709 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 17:46:03,709 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 10 [2021-10-13 17:46:03,709 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887833867] [2021-10-13 17:46:03,710 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-13 17:46:03,711 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 17:46:03,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-13 17:46:03,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-10-13 17:46:03,712 INFO L87 Difference]: Start difference. First operand 124 states and 317 transitions. Second operand has 12 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 17:46:03,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 17:46:03,843 INFO L93 Difference]: Finished difference Result 171 states and 426 transitions. [2021-10-13 17:46:03,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-13 17:46:03,844 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-10-13 17:46:03,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 17:46:03,846 INFO L225 Difference]: With dead ends: 171 [2021-10-13 17:46:03,846 INFO L226 Difference]: Without dead ends: 150 [2021-10-13 17:46:03,847 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 349.6ms TimeCoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-10-13 17:46:03,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-10-13 17:46:03,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 130. [2021-10-13 17:46:03,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 129 states have (on average 2.604651162790698) internal successors, (336), 129 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 17:46:03,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 336 transitions. [2021-10-13 17:46:03,874 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 336 transitions. Word has length 15 [2021-10-13 17:46:03,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 17:46:03,875 INFO L470 AbstractCegarLoop]: Abstraction has 130 states and 336 transitions. [2021-10-13 17:46:03,876 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 17:46:03,877 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 336 transitions. [2021-10-13 17:46:03,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-13 17:46:03,883 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 17:46:03,883 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 17:46:03,908 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 [2021-10-13 17:46:04,091 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 17:46:04,092 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 17:46:04,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 17:46:04,093 INFO L82 PathProgramCache]: Analyzing trace with hash -1833720335, now seen corresponding path program 5 times [2021-10-13 17:46:04,094 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 17:46:04,094 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317525860] [2021-10-13 17:46:04,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 17:46:04,095 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 17:46:04,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 17:46:04,320 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 17:46:04,320 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 17:46:04,320 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317525860] [2021-10-13 17:46:04,321 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1317525860] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 17:46:04,321 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2108721771] [2021-10-13 17:46:04,321 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-13 17:46:04,321 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 17:46:04,321 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 17:46:04,322 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) [2021-10-13 17:46:04,346 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 [2021-10-13 17:46:04,441 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 17:46:04,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 17:46:04,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2021-10-13 17:46:04,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 17:46:04,847 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 17:46:04,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2108721771] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 17:46:04,848 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 17:46:04,848 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 11 [2021-10-13 17:46:04,848 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831574834] [2021-10-13 17:46:04,849 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-13 17:46:04,849 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 17:46:04,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-13 17:46:04,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-10-13 17:46:04,850 INFO L87 Difference]: Start difference. First operand 130 states and 336 transitions. Second operand has 13 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 17:46:04,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 17:46:04,990 INFO L93 Difference]: Finished difference Result 196 states and 484 transitions. [2021-10-13 17:46:04,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-13 17:46:04,991 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-10-13 17:46:04,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 17:46:04,993 INFO L225 Difference]: With dead ends: 196 [2021-10-13 17:46:04,993 INFO L226 Difference]: Without dead ends: 186 [2021-10-13 17:46:04,993 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 149.2ms TimeCoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-10-13 17:46:04,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2021-10-13 17:46:05,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 140. [2021-10-13 17:46:05,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 139 states have (on average 2.6115107913669067) internal successors, (363), 139 states have internal predecessors, (363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 17:46:05,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 363 transitions. [2021-10-13 17:46:05,004 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 363 transitions. Word has length 15 [2021-10-13 17:46:05,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 17:46:05,004 INFO L470 AbstractCegarLoop]: Abstraction has 140 states and 363 transitions. [2021-10-13 17:46:05,004 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 17:46:05,004 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 363 transitions. [2021-10-13 17:46:05,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-13 17:46:05,006 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 17:46:05,006 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 17:46:05,045 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 [2021-10-13 17:46:05,220 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 17:46:05,221 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 17:46:05,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 17:46:05,222 INFO L82 PathProgramCache]: Analyzing trace with hash 1011509771, now seen corresponding path program 6 times [2021-10-13 17:46:05,222 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 17:46:05,222 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538136775] [2021-10-13 17:46:05,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 17:46:05,223 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 17:46:05,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 17:46:05,374 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-13 17:46:05,374 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 17:46:05,375 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538136775] [2021-10-13 17:46:05,375 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538136775] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 17:46:05,375 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [660595785] [2021-10-13 17:46:05,375 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-13 17:46:05,376 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 17:46:05,376 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 17:46:05,377 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) [2021-10-13 17:46:05,399 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 [2021-10-13 17:46:05,507 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-10-13 17:46:05,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 17:46:05,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-13 17:46:05,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 17:46:05,650 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-13 17:46:05,650 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [660595785] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 17:46:05,650 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 17:46:05,650 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-10-13 17:46:05,651 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812826328] [2021-10-13 17:46:05,651 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-13 17:46:05,651 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 17:46:05,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-13 17:46:05,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-10-13 17:46:05,652 INFO L87 Difference]: Start difference. First operand 140 states and 363 transitions. Second operand has 10 states, 10 states have (on average 2.8) internal successors, (28), 9 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 17:46:05,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 17:46:05,700 INFO L93 Difference]: Finished difference Result 156 states and 380 transitions. [2021-10-13 17:46:05,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-13 17:46:05,701 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 9 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-10-13 17:46:05,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 17:46:05,703 INFO L225 Difference]: With dead ends: 156 [2021-10-13 17:46:05,703 INFO L226 Difference]: Without dead ends: 138 [2021-10-13 17:46:05,704 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 76.5ms TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-10-13 17:46:05,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-10-13 17:46:05,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 108. [2021-10-13 17:46:05,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 2.514018691588785) internal successors, (269), 107 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 17:46:05,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 269 transitions. [2021-10-13 17:46:05,717 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 269 transitions. Word has length 16 [2021-10-13 17:46:05,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 17:46:05,718 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 269 transitions. [2021-10-13 17:46:05,718 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 9 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 17:46:05,718 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 269 transitions. [2021-10-13 17:46:05,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-13 17:46:05,719 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 17:46:05,719 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 17:46:05,758 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 [2021-10-13 17:46:05,933 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 17:46:05,934 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 17:46:05,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 17:46:05,935 INFO L82 PathProgramCache]: Analyzing trace with hash -254435671, now seen corresponding path program 7 times [2021-10-13 17:46:05,936 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 17:46:05,936 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582689375] [2021-10-13 17:46:05,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 17:46:05,937 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 17:46:05,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 17:46:06,071 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-13 17:46:06,072 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 17:46:06,072 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582689375] [2021-10-13 17:46:06,072 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1582689375] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 17:46:06,072 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [642719282] [2021-10-13 17:46:06,073 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-13 17:46:06,073 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 17:46:06,073 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 17:46:06,074 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) [2021-10-13 17:46:06,095 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 [2021-10-13 17:46:06,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 17:46:06,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-13 17:46:06,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 17:46:06,386 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-13 17:46:06,386 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [642719282] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 17:46:06,386 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 17:46:06,386 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2021-10-13 17:46:06,387 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055847119] [2021-10-13 17:46:06,387 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-13 17:46:06,387 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 17:46:06,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-13 17:46:06,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-10-13 17:46:06,388 INFO L87 Difference]: Start difference. First operand 108 states and 269 transitions. Second operand has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 17:46:06,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 17:46:06,489 INFO L93 Difference]: Finished difference Result 122 states and 288 transitions. [2021-10-13 17:46:06,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-13 17:46:06,490 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-10-13 17:46:06,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 17:46:06,491 INFO L225 Difference]: With dead ends: 122 [2021-10-13 17:46:06,491 INFO L226 Difference]: Without dead ends: 116 [2021-10-13 17:46:06,492 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 103.0ms TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-10-13 17:46:06,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-10-13 17:46:06,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 86. [2021-10-13 17:46:06,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 2.3411764705882354) internal successors, (199), 85 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 17:46:06,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 199 transitions. [2021-10-13 17:46:06,497 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 199 transitions. Word has length 16 [2021-10-13 17:46:06,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 17:46:06,497 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 199 transitions. [2021-10-13 17:46:06,497 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 17:46:06,497 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 199 transitions. [2021-10-13 17:46:06,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-13 17:46:06,498 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 17:46:06,498 INFO L512 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 17:46:06,541 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 [2021-10-13 17:46:06,710 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 17:46:06,710 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 17:46:06,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 17:46:06,711 INFO L82 PathProgramCache]: Analyzing trace with hash -1273592207, now seen corresponding path program 8 times [2021-10-13 17:46:06,711 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 17:46:06,711 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128426030] [2021-10-13 17:46:06,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 17:46:06,712 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 17:46:06,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 17:46:07,096 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 17:46:07,097 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 17:46:07,097 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128426030] [2021-10-13 17:46:07,097 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2128426030] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 17:46:07,098 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [422470708] [2021-10-13 17:46:07,098 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 17:46:07,098 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 17:46:07,098 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 17:46:07,099 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) [2021-10-13 17:46:07,131 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 [2021-10-13 17:46:07,279 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 17:46:07,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 17:46:07,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 22 conjunts are in the unsatisfiable core [2021-10-13 17:46:07,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 17:46:07,644 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 17:46:07,644 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [422470708] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 17:46:07,644 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 17:46:07,644 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 12 [2021-10-13 17:46:07,645 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68469845] [2021-10-13 17:46:07,645 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-13 17:46:07,645 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 17:46:07,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-13 17:46:07,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-10-13 17:46:07,646 INFO L87 Difference]: Start difference. First operand 86 states and 199 transitions. Second operand has 14 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 13 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 17:46:07,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 17:46:07,814 INFO L93 Difference]: Finished difference Result 140 states and 327 transitions. [2021-10-13 17:46:07,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-13 17:46:07,815 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 13 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-10-13 17:46:07,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 17:46:07,815 INFO L225 Difference]: With dead ends: 140 [2021-10-13 17:46:07,816 INFO L226 Difference]: Without dead ends: 0 [2021-10-13 17:46:07,816 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 213.0ms TimeCoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-10-13 17:46:07,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-13 17:46:07,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-13 17:46:07,817 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) [2021-10-13 17:46:07,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-13 17:46:07,817 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 17 [2021-10-13 17:46:07,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 17:46:07,817 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-13 17:46:07,817 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 13 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 17:46:07,817 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-13 17:46:07,818 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-13 17:46:07,821 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-13 17:46:07,821 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATION [2021-10-13 17:46:07,822 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATION [2021-10-13 17:46:07,864 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 [2021-10-13 17:46:08,032 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-10-13 17:46:08,039 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-10-13 17:46:08,040 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-13 17:46:08,049 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.10 05:46:08 BasicIcfg [2021-10-13 17:46:08,050 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-13 17:46:08,051 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-13 17:46:08,051 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-13 17:46:08,052 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-13 17:46:08,052 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 05:45:53" (3/4) ... [2021-10-13 17:46:08,059 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-13 17:46:08,080 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure thread1 [2021-10-13 17:46:08,080 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure thread2 [2021-10-13 17:46:08,094 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 13 nodes and edges [2021-10-13 17:46:08,095 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-10-13 17:46:08,095 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-13 17:46:08,095 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-13 17:46:08,198 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-10-13 17:46:08,199 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-13 17:46:08,201 INFO L168 Benchmark]: Toolchain (without parser) took 15382.67 ms. Allocated memory was 44.0 MB in the beginning and 98.6 MB in the end (delta: 54.5 MB). Free memory was 20.8 MB in the beginning and 45.2 MB in the end (delta: -24.3 MB). Peak memory consumption was 33.4 MB. Max. memory is 16.1 GB. [2021-10-13 17:46:08,207 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 44.0 MB. Free memory was 30.3 MB in the beginning and 30.3 MB in the end (delta: 23.6 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 17:46:08,208 INFO L168 Benchmark]: CACSL2BoogieTranslator took 359.63 ms. Allocated memory is still 44.0 MB. Free memory was 29.7 MB in the beginning and 19.5 MB in the end (delta: 10.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-13 17:46:08,209 INFO L168 Benchmark]: Boogie Procedure Inliner took 84.77 ms. Allocated memory was 44.0 MB in the beginning and 54.5 MB in the end (delta: 10.5 MB). Free memory was 19.5 MB in the beginning and 38.5 MB in the end (delta: -19.0 MB). Peak memory consumption was 2.6 MB. Max. memory is 16.1 GB. [2021-10-13 17:46:08,210 INFO L168 Benchmark]: Boogie Preprocessor took 70.84 ms. Allocated memory is still 54.5 MB. Free memory was 38.5 MB in the beginning and 37.3 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 17:46:08,211 INFO L168 Benchmark]: RCFGBuilder took 615.68 ms. Allocated memory is still 54.5 MB. Free memory was 37.1 MB in the beginning and 37.8 MB in the end (delta: -723.9 kB). Peak memory consumption was 14.2 MB. Max. memory is 16.1 GB. [2021-10-13 17:46:08,212 INFO L168 Benchmark]: TraceAbstraction took 14075.97 ms. Allocated memory was 54.5 MB in the beginning and 98.6 MB in the end (delta: 44.0 MB). Free memory was 37.5 MB in the beginning and 48.2 MB in the end (delta: -10.6 MB). Peak memory consumption was 34.1 MB. Max. memory is 16.1 GB. [2021-10-13 17:46:08,213 INFO L168 Benchmark]: Witness Printer took 147.70 ms. Allocated memory is still 98.6 MB. Free memory was 48.2 MB in the beginning and 45.2 MB in the end (delta: 3.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 17:46:08,220 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 44.0 MB. Free memory was 30.3 MB in the beginning and 30.3 MB in the end (delta: 23.6 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 359.63 ms. Allocated memory is still 44.0 MB. Free memory was 29.7 MB in the beginning and 19.5 MB in the end (delta: 10.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 84.77 ms. Allocated memory was 44.0 MB in the beginning and 54.5 MB in the end (delta: 10.5 MB). Free memory was 19.5 MB in the beginning and 38.5 MB in the end (delta: -19.0 MB). Peak memory consumption was 2.6 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 70.84 ms. Allocated memory is still 54.5 MB. Free memory was 38.5 MB in the beginning and 37.3 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 615.68 ms. Allocated memory is still 54.5 MB. Free memory was 37.1 MB in the beginning and 37.8 MB in the end (delta: -723.9 kB). Peak memory consumption was 14.2 MB. Max. memory is 16.1 GB. * TraceAbstraction took 14075.97 ms. Allocated memory was 54.5 MB in the beginning and 98.6 MB in the end (delta: 44.0 MB). Free memory was 37.5 MB in the beginning and 48.2 MB in the end (delta: -10.6 MB). Peak memory consumption was 34.1 MB. Max. memory is 16.1 GB. * Witness Printer took 147.70 ms. Allocated memory is still 98.6 MB. Free memory was 48.2 MB in the beginning and 45.2 MB in the end (delta: 3.0 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: 4143.9ms, 85 PlacesBefore, 21 PlacesAfterwards, 89 TransitionsBefore, 16 TransitionsAfterwards, 1088 CoEnabledTransitionPairs, 6 FixpointIterations, 38 TrivialSequentialCompositions, 31 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 6 ConcurrentYvCompositions, 9 ChoiceCompositions, 84 TotalNumberOfCompositions, 1018 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 1018, positive: 1018, positive conditional: 0, positive unconditional: 1018, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 776, positive: 776, positive conditional: 0, positive unconditional: 776, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 776, positive: 766, positive conditional: 0, positive unconditional: 766, negative: 10, negative conditional: 0, negative unconditional: 10, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 10, positive: 10, positive conditional: 0, positive unconditional: 10, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 55, positive: 55, positive conditional: 0, positive unconditional: 55, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 1018, positive: 242, positive conditional: 0, positive unconditional: 242, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 776, unknown conditional: 0, unknown unconditional: 776] , Statistics on independence cache: Total cache size (in pairs): 18, Positive cache size: 18, Positive conditional cache size: 0, Positive unconditional cache size: 18, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0 - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 97]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 107 locations, 3 error locations. Started 1 CEGAR loops. OverallTime: 13839.0ms, OverallIterations: 10, TraceHistogramMax: 4, EmptinessCheckTime: 24.6ms, AutomataDifference: 1145.7ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 4212.3ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 183 SDtfs, 404 SDslu, 728 SDs, 0 SdLazy, 471 SolverSat, 86 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 541.4ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 174 GetRequests, 78 SyntacticMatches, 6 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 1244.5ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=140occurred in iteration=7, InterpolantAutomatonStates: 82, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 150.2ms AutomataMinimizationTime, 10 MinimizatonAttempts, 204 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 92.4ms SsaConstructionTime, 848.3ms SatisfiabilityAnalysisTime, 4678.9ms InterpolantComputationTime, 267 NumberOfCodeBlocks, 267 NumberOfCodeBlocksAsserted, 25 NumberOfCheckSat, 249 ConstructedInterpolants, 0 QuantifiedInterpolants, 2874 SizeOfPredicates, 27 NumberOfNonLiveVariables, 820 ConjunctsInSsa, 140 ConjunctsInUnsatCore, 18 InterpolantComputations, 2 PerfectInterpolantSequences, 16/115 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-10-13 17:46:08,339 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...