./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/test-easy1.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 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/test-easy1.wvr.c -s /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash d4cac6d625e5a9f17718e7cb4b62a8d27fd7d6cb .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. 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 18:43:36,546 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 18:43:36,548 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 18:43:36,583 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-13 18:43:36,584 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-13 18:43:36,585 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-13 18:43:36,587 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-13 18:43:36,589 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-13 18:43:36,592 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-13 18:43:36,593 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-13 18:43:36,594 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-13 18:43:36,596 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-13 18:43:36,597 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 18:43:36,598 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 18:43:36,600 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 18:43:36,602 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 18:43:36,603 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 18:43:36,604 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 18:43:36,607 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 18:43:36,609 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 18:43:36,611 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 18:43:36,613 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 18:43:36,615 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 18:43:36,616 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 18:43:36,620 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-13 18:43:36,621 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-13 18:43:36,621 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-13 18:43:36,622 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-13 18:43:36,623 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-13 18:43:36,624 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-13 18:43:36,625 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-13 18:43:36,626 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-13 18:43:36,627 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-13 18:43:36,628 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-13 18:43:36,630 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-13 18:43:36,630 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-13 18:43:36,631 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-13 18:43:36,631 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-13 18:43:36,632 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 18:43:36,633 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 18:43:36,634 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 18:43:36,638 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 18:43:36,700 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 18:43:36,701 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 18:43:36,701 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-13 18:43:36,702 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-13 18:43:36,705 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-13 18:43:36,705 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-13 18:43:36,705 INFO L138 SettingsManager]: * Use SBE=true [2021-10-13 18:43:36,706 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 18:43:36,706 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 18:43:36,706 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-13 18:43:36,707 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 18:43:36,708 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 18:43:36,708 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-13 18:43:36,708 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-13 18:43:36,709 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-13 18:43:36,709 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 18:43:36,709 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-13 18:43:36,709 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 18:43:36,710 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-13 18:43:36,710 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 18:43:36,710 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-13 18:43:36,710 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-13 18:43:36,711 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 18:43:36,711 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 18:43:36,711 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-13 18:43:36,711 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-13 18:43:36,712 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-13 18:43:36,712 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-13 18:43:36,712 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-13 18:43:36,712 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 18:43:36,713 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d4cac6d625e5a9f17718e7cb4b62a8d27fd7d6cb [2021-10-13 18:43:37,126 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 18:43:37,153 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 18:43:37,157 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 18:43:37,158 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 18:43:37,159 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 18:43:37,160 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/test-easy1.wvr.c [2021-10-13 18:43:37,232 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/89aabe586/369153d19e5c42b5847009b32efad5c4/FLAG3c70bcff9 [2021-10-13 18:43:37,835 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 18:43:37,837 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/releaseScripts/default/sv-benchmarks/c/weaver/test-easy1.wvr.c [2021-10-13 18:43:37,845 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/89aabe586/369153d19e5c42b5847009b32efad5c4/FLAG3c70bcff9 [2021-10-13 18:43:38,175 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/89aabe586/369153d19e5c42b5847009b32efad5c4 [2021-10-13 18:43:38,180 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 18:43:38,198 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-13 18:43:38,200 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 18:43:38,201 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 18:43:38,205 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 18:43:38,206 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 06:43:38" (1/1) ... [2021-10-13 18:43:38,207 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@14d641a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:43:38, skipping insertion in model container [2021-10-13 18:43:38,208 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 06:43:38" (1/1) ... [2021-10-13 18:43:38,216 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 18:43:38,234 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 18:43:38,411 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-2/releaseScripts/default/sv-benchmarks/c/weaver/test-easy1.wvr.c[1876,1889] [2021-10-13 18:43:38,416 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 18:43:38,427 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 18:43:38,448 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-2/releaseScripts/default/sv-benchmarks/c/weaver/test-easy1.wvr.c[1876,1889] [2021-10-13 18:43:38,450 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 18:43:38,466 INFO L208 MainTranslator]: Completed translation [2021-10-13 18:43:38,466 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:43:38 WrapperNode [2021-10-13 18:43:38,467 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 18:43:38,468 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-13 18:43:38,468 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-13 18:43:38,468 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-13 18:43:38,477 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:43:38" (1/1) ... [2021-10-13 18:43:38,486 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:43:38" (1/1) ... [2021-10-13 18:43:38,509 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-13 18:43:38,510 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 18:43:38,510 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 18:43:38,511 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 18:43:38,521 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:43:38" (1/1) ... [2021-10-13 18:43:38,521 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:43:38" (1/1) ... [2021-10-13 18:43:38,523 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:43:38" (1/1) ... [2021-10-13 18:43:38,524 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:43:38" (1/1) ... [2021-10-13 18:43:38,529 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:43:38" (1/1) ... [2021-10-13 18:43:38,534 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:43:38" (1/1) ... [2021-10-13 18:43:38,535 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:43:38" (1/1) ... [2021-10-13 18:43:38,538 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 18:43:38,539 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 18:43:38,539 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 18:43:38,539 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 18:43:38,540 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:43:38" (1/1) ... [2021-10-13 18:43:38,549 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 18:43:38,568 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 18:43:38,586 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 18:43:38,615 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 18:43:38,682 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-10-13 18:43:38,683 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-10-13 18:43:38,684 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-10-13 18:43:38,685 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-10-13 18:43:38,685 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-13 18:43:38,685 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-13 18:43:38,686 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-13 18:43:38,686 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 18:43:38,686 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 18:43:38,687 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-13 18:43:38,687 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-13 18:43:38,689 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 18:43:39,058 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 18:43:39,058 INFO L299 CfgBuilder]: Removed 10 assume(true) statements. [2021-10-13 18:43:39,064 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 06:43:39 BoogieIcfgContainer [2021-10-13 18:43:39,064 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 18:43:39,069 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-13 18:43:39,069 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-13 18:43:39,076 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-13 18:43:39,077 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 06:43:38" (1/3) ... [2021-10-13 18:43:39,080 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6603fb1b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 06:43:39, skipping insertion in model container [2021-10-13 18:43:39,080 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:43:38" (2/3) ... [2021-10-13 18:43:39,080 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6603fb1b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 06:43:39, skipping insertion in model container [2021-10-13 18:43:39,081 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 06:43:39" (3/3) ... [2021-10-13 18:43:39,086 INFO L111 eAbstractionObserver]: Analyzing ICFG test-easy1.wvr.c [2021-10-13 18:43:39,101 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-10-13 18:43:39,102 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-13 18:43:39,102 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-13 18:43:39,103 INFO L516 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-10-13 18:43:39,149 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 18:43:39,149 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 18:43:39,150 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 18:43:39,150 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 18:43:39,150 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 18:43:39,151 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 18:43:39,151 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 18:43:39,151 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 18:43:39,152 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 18:43:39,152 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 18:43:39,153 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 18:43:39,153 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 18:43:39,153 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 18:43:39,154 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 18:43:39,154 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 18:43:39,154 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 18:43:39,155 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 18:43:39,155 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 18:43:39,155 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 18:43:39,156 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 18:43:39,166 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 18:43:39,166 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 18:43:39,167 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 18:43:39,174 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 18:43:39,175 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 18:43:39,176 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 18:43:39,195 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-10-13 18:43:39,274 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-13 18:43:39,286 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 18:43:39,287 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-10-13 18:43:39,324 INFO L118 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-10-13 18:43:39,343 INFO L133 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 77 places, 76 transitions, 168 flow [2021-10-13 18:43:39,346 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 77 places, 76 transitions, 168 flow [2021-10-13 18:43:39,349 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 77 places, 76 transitions, 168 flow [2021-10-13 18:43:39,403 INFO L129 PetriNetUnfolder]: 6/74 cut-off events. [2021-10-13 18:43:39,403 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-10-13 18:43:39,408 INFO L84 FinitePrefix]: Finished finitePrefix Result has 83 conditions, 74 events. 6/74 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 44 event pairs, 0 based on Foata normal form. 0/67 useless extension candidates. Maximal degree in co-relation 44. Up to 2 conditions per place. [2021-10-13 18:43:39,411 INFO L116 LiptonReduction]: Number of co-enabled transitions 368 [2021-10-13 18:43:42,629 INFO L131 LiptonReduction]: Checked pairs total: 382 [2021-10-13 18:43:42,629 INFO L133 LiptonReduction]: Total number of compositions: 69 [2021-10-13 18:43:42,648 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 21 places, 16 transitions, 48 flow [2021-10-13 18:43:42,664 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 18:43:42,667 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 18:43:42,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-13 18:43:42,676 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 18:43:42,676 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 18:43:42,677 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 18:43:42,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 18:43:42,684 INFO L82 PathProgramCache]: Analyzing trace with hash -10847143, now seen corresponding path program 1 times [2021-10-13 18:43:42,695 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 18:43:42,697 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578149251] [2021-10-13 18:43:42,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 18:43:42,698 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 18:43:43,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 18:43:43,414 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 18:43:43,414 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 18:43:43,415 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578149251] [2021-10-13 18:43:43,415 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1578149251] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 18:43:43,416 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 18:43:43,416 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-10-13 18:43:43,420 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801876995] [2021-10-13 18:43:43,429 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 18:43:43,431 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 18:43:43,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 18:43:43,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 18:43:43,485 INFO L87 Difference]: Start difference. First operand has 20 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 18:43:43,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 18:43:43,719 INFO L93 Difference]: Finished difference Result 37 states and 77 transitions. [2021-10-13 18:43:43,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 18:43:43,722 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-10-13 18:43:43,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 18:43:43,752 INFO L225 Difference]: With dead ends: 37 [2021-10-13 18:43:43,753 INFO L226 Difference]: Without dead ends: 32 [2021-10-13 18:43:43,754 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 100.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 18:43:43,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-10-13 18:43:43,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-10-13 18:43:43,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 2.161290322580645) internal successors, (67), 31 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 18:43:43,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 67 transitions. [2021-10-13 18:43:43,833 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 67 transitions. Word has length 11 [2021-10-13 18:43:43,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 18:43:43,834 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 67 transitions. [2021-10-13 18:43:43,835 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 18:43:43,835 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 67 transitions. [2021-10-13 18:43:43,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-13 18:43:43,837 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 18:43:43,837 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 18:43:43,837 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-13 18:43:43,838 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 18:43:43,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 18:43:43,841 INFO L82 PathProgramCache]: Analyzing trace with hash -408597772, now seen corresponding path program 1 times [2021-10-13 18:43:43,841 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 18:43:43,842 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178303349] [2021-10-13 18:43:43,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 18:43:43,843 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 18:43:43,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 18:43:44,004 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 18:43:44,005 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 18:43:44,005 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178303349] [2021-10-13 18:43:44,006 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178303349] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 18:43:44,006 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1686489786] [2021-10-13 18:43:44,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 18:43:44,007 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 18:43:44,007 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 18:43:44,017 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 18:43:44,039 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 18:43:44,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 18:43:44,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-13 18:43:44,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 18:43:44,709 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 18:43:44,711 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1686489786] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 18:43:44,711 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 18:43:44,712 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 4 [2021-10-13 18:43:44,716 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759176683] [2021-10-13 18:43:44,717 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-13 18:43:44,721 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 18:43:44,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-13 18:43:44,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-13 18:43:44,724 INFO L87 Difference]: Start difference. First operand 32 states and 67 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 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 18:43:44,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 18:43:44,792 INFO L93 Difference]: Finished difference Result 77 states and 152 transitions. [2021-10-13 18:43:44,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-13 18:43:44,793 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 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 18:43:44,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 18:43:44,799 INFO L225 Difference]: With dead ends: 77 [2021-10-13 18:43:44,799 INFO L226 Difference]: Without dead ends: 72 [2021-10-13 18:43:44,800 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 37.4ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-13 18:43:44,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-10-13 18:43:44,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 42. [2021-10-13 18:43:44,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 2.292682926829268) internal successors, (94), 41 states have internal predecessors, (94), 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 18:43:44,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 94 transitions. [2021-10-13 18:43:44,822 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 94 transitions. Word has length 12 [2021-10-13 18:43:44,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 18:43:44,823 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 94 transitions. [2021-10-13 18:43:44,824 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 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 18:43:44,824 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 94 transitions. [2021-10-13 18:43:44,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-13 18:43:44,825 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 18:43:44,825 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 18:43:44,881 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-10-13 18:43:45,041 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 18:43:45,041 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 18:43:45,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 18:43:45,042 INFO L82 PathProgramCache]: Analyzing trace with hash -860303794, now seen corresponding path program 1 times [2021-10-13 18:43:45,042 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 18:43:45,043 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343345806] [2021-10-13 18:43:45,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 18:43:45,046 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 18:43:45,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 18:43:45,315 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 18:43:45,316 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 18:43:45,316 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343345806] [2021-10-13 18:43:45,316 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343345806] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 18:43:45,316 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 18:43:45,316 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-13 18:43:45,317 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827196069] [2021-10-13 18:43:45,317 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 18:43:45,317 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 18:43:45,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 18:43:45,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 18:43:45,318 INFO L87 Difference]: Start difference. First operand 42 states and 94 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 18:43:45,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 18:43:45,340 INFO L93 Difference]: Finished difference Result 52 states and 109 transitions. [2021-10-13 18:43:45,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 18:43:45,341 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-10-13 18:43:45,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 18:43:45,342 INFO L225 Difference]: With dead ends: 52 [2021-10-13 18:43:45,343 INFO L226 Difference]: Without dead ends: 44 [2021-10-13 18:43:45,343 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 108.3ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 18:43:45,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-10-13 18:43:45,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2021-10-13 18:43:45,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 2.255813953488372) internal successors, (97), 43 states have internal predecessors, (97), 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 18:43:45,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 97 transitions. [2021-10-13 18:43:45,357 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 97 transitions. Word has length 12 [2021-10-13 18:43:45,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 18:43:45,358 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 97 transitions. [2021-10-13 18:43:45,358 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 18:43:45,359 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 97 transitions. [2021-10-13 18:43:45,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-13 18:43:45,361 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 18:43:45,361 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 18:43:45,361 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-13 18:43:45,362 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 18:43:45,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 18:43:45,362 INFO L82 PathProgramCache]: Analyzing trace with hash 2089316486, now seen corresponding path program 2 times [2021-10-13 18:43:45,362 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 18:43:45,363 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725309540] [2021-10-13 18:43:45,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 18:43:45,365 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 18:43:45,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 18:43:45,472 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 18:43:45,473 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 18:43:45,474 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725309540] [2021-10-13 18:43:45,474 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725309540] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 18:43:45,474 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [777070336] [2021-10-13 18:43:45,475 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 18:43:45,475 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 18:43:45,475 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 18:43:45,476 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 18:43:45,532 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 18:43:45,613 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 18:43:45,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 18:43:45,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-13 18:43:45,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 18:43:45,723 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 18:43:45,724 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [777070336] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 18:43:45,724 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 18:43:45,724 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 4 [2021-10-13 18:43:45,725 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696005804] [2021-10-13 18:43:45,726 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-13 18:43:45,726 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 18:43:45,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-13 18:43:45,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-13 18:43:45,727 INFO L87 Difference]: Start difference. First operand 44 states and 97 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 18:43:45,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 18:43:45,777 INFO L93 Difference]: Finished difference Result 85 states and 178 transitions. [2021-10-13 18:43:45,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-13 18:43:45,778 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-10-13 18:43:45,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 18:43:45,784 INFO L225 Difference]: With dead ends: 85 [2021-10-13 18:43:45,785 INFO L226 Difference]: Without dead ends: 80 [2021-10-13 18:43:45,788 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.5ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-13 18:43:45,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-10-13 18:43:45,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 52. [2021-10-13 18:43:45,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 2.411764705882353) internal successors, (123), 51 states have internal predecessors, (123), 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 18:43:45,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 123 transitions. [2021-10-13 18:43:45,810 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 123 transitions. Word has length 12 [2021-10-13 18:43:45,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 18:43:45,810 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 123 transitions. [2021-10-13 18:43:45,811 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 18:43:45,815 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 123 transitions. [2021-10-13 18:43:45,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-13 18:43:45,816 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 18:43:45,818 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 18:43:45,854 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-10-13 18:43:46,035 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 18:43:46,035 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 18:43:46,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 18:43:46,036 INFO L82 PathProgramCache]: Analyzing trace with hash -291936530, now seen corresponding path program 1 times [2021-10-13 18:43:46,036 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 18:43:46,037 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141341474] [2021-10-13 18:43:46,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 18:43:46,037 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 18:43:46,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 18:43:46,274 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 18:43:46,274 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 18:43:46,275 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141341474] [2021-10-13 18:43:46,275 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141341474] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 18:43:46,275 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [571490174] [2021-10-13 18:43:46,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 18:43:46,276 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 18:43:46,276 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 18:43:46,277 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 18:43:46,315 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 18:43:46,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 18:43:46,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-13 18:43:46,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 18:43:46,729 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 18:43:46,729 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [571490174] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 18:43:46,730 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-13 18:43:46,730 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 10 [2021-10-13 18:43:46,730 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477941] [2021-10-13 18:43:46,731 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 18:43:46,731 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 18:43:46,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 18:43:46,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-10-13 18:43:46,732 INFO L87 Difference]: Start difference. First operand 52 states and 123 transitions. Second operand has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 18:43:46,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 18:43:46,763 INFO L93 Difference]: Finished difference Result 73 states and 165 transitions. [2021-10-13 18:43:46,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-13 18:43:46,764 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-10-13 18:43:46,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 18:43:46,765 INFO L225 Difference]: With dead ends: 73 [2021-10-13 18:43:46,765 INFO L226 Difference]: Without dead ends: 48 [2021-10-13 18:43:46,766 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 86.7ms TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-10-13 18:43:46,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-10-13 18:43:46,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 40. [2021-10-13 18:43:46,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 2.282051282051282) internal successors, (89), 39 states have internal predecessors, (89), 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 18:43:46,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 89 transitions. [2021-10-13 18:43:46,771 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 89 transitions. Word has length 14 [2021-10-13 18:43:46,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 18:43:46,772 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 89 transitions. [2021-10-13 18:43:46,772 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 18:43:46,772 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 89 transitions. [2021-10-13 18:43:46,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-13 18:43:46,773 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 18:43:46,774 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 18:43:46,808 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 18:43:46,989 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 18:43:46,990 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 18:43:46,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 18:43:46,991 INFO L82 PathProgramCache]: Analyzing trace with hash -1637283546, now seen corresponding path program 2 times [2021-10-13 18:43:46,991 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 18:43:46,991 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047161846] [2021-10-13 18:43:46,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 18:43:46,991 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 18:43:47,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 18:43:47,398 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 18:43:47,399 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 18:43:47,399 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047161846] [2021-10-13 18:43:47,399 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1047161846] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 18:43:47,399 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1667800539] [2021-10-13 18:43:47,399 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 18:43:47,400 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 18:43:47,400 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 18:43:47,405 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 18:43:47,421 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 18:43:47,646 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 18:43:47,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 18:43:47,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-13 18:43:47,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 18:43:48,388 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 18:43:48,389 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1667800539] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 18:43:48,389 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-13 18:43:48,389 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2021-10-13 18:43:48,390 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772253174] [2021-10-13 18:43:48,390 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 18:43:48,390 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 18:43:48,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 18:43:48,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-10-13 18:43:48,392 INFO L87 Difference]: Start difference. First operand 40 states and 89 transitions. Second operand has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 18:43:48,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 18:43:48,428 INFO L93 Difference]: Finished difference Result 75 states and 159 transitions. [2021-10-13 18:43:48,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-13 18:43:48,428 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-10-13 18:43:48,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 18:43:48,429 INFO L225 Difference]: With dead ends: 75 [2021-10-13 18:43:48,430 INFO L226 Difference]: Without dead ends: 64 [2021-10-13 18:43:48,430 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 234.2ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-10-13 18:43:48,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-10-13 18:43:48,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 48. [2021-10-13 18:43:48,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 2.3191489361702127) internal successors, (109), 47 states have internal predecessors, (109), 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 18:43:48,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 109 transitions. [2021-10-13 18:43:48,443 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 109 transitions. Word has length 14 [2021-10-13 18:43:48,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 18:43:48,443 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 109 transitions. [2021-10-13 18:43:48,443 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 18:43:48,444 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 109 transitions. [2021-10-13 18:43:48,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-13 18:43:48,445 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 18:43:48,449 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 18:43:48,523 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 18:43:48,667 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 18:43:48,667 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 18:43:48,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 18:43:48,668 INFO L82 PathProgramCache]: Analyzing trace with hash -1958132616, now seen corresponding path program 3 times [2021-10-13 18:43:48,668 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 18:43:48,668 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682004986] [2021-10-13 18:43:48,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 18:43:48,669 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 18:43:48,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 18:43:49,440 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 18:43:49,441 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 18:43:49,441 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682004986] [2021-10-13 18:43:49,441 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682004986] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 18:43:49,441 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2126084585] [2021-10-13 18:43:49,442 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 18:43:49,442 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 18:43:49,444 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 18:43:49,450 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 18:43:49,470 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 18:43:49,573 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-13 18:43:49,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 18:43:49,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-13 18:43:49,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 18:43:49,694 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 18:43:49,694 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2126084585] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 18:43:49,694 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-13 18:43:49,694 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2021-10-13 18:43:49,695 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640924391] [2021-10-13 18:43:49,695 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 18:43:49,695 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 18:43:49,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 18:43:49,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-10-13 18:43:49,697 INFO L87 Difference]: Start difference. First operand 48 states and 109 transitions. Second operand has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 18:43:49,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 18:43:49,722 INFO L93 Difference]: Finished difference Result 63 states and 133 transitions. [2021-10-13 18:43:49,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-13 18:43:49,723 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-10-13 18:43:49,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 18:43:49,723 INFO L225 Difference]: With dead ends: 63 [2021-10-13 18:43:49,724 INFO L226 Difference]: Without dead ends: 32 [2021-10-13 18:43:49,724 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 293.4ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-10-13 18:43:49,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-10-13 18:43:49,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2021-10-13 18:43:49,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 29 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 18:43:49,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 56 transitions. [2021-10-13 18:43:49,727 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 56 transitions. Word has length 14 [2021-10-13 18:43:49,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 18:43:49,728 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 56 transitions. [2021-10-13 18:43:49,728 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 18:43:49,728 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 56 transitions. [2021-10-13 18:43:49,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-13 18:43:49,729 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 18:43:49,729 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 18:43:49,769 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 18:43:49,945 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 18:43:49,945 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 18:43:49,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 18:43:49,946 INFO L82 PathProgramCache]: Analyzing trace with hash 1327048486, now seen corresponding path program 4 times [2021-10-13 18:43:49,946 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 18:43:49,946 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134159355] [2021-10-13 18:43:49,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 18:43:49,947 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 18:43:49,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 18:43:50,156 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 18:43:50,156 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 18:43:50,156 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134159355] [2021-10-13 18:43:50,157 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134159355] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 18:43:50,157 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [961052380] [2021-10-13 18:43:50,157 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-13 18:43:50,157 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 18:43:50,158 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 18:43:50,159 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 18:43:50,176 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 18:43:50,255 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-13 18:43:50,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 18:43:50,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-13 18:43:50,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 18:43:50,353 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 18:43:50,353 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [961052380] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 18:43:50,354 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 18:43:50,354 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-10-13 18:43:50,354 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427578071] [2021-10-13 18:43:50,355 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-13 18:43:50,355 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 18:43:50,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-13 18:43:50,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-10-13 18:43:50,356 INFO L87 Difference]: Start difference. First operand 30 states and 56 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 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 18:43:50,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 18:43:50,460 INFO L93 Difference]: Finished difference Result 46 states and 79 transitions. [2021-10-13 18:43:50,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-13 18:43:50,461 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-10-13 18:43:50,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 18:43:50,461 INFO L225 Difference]: With dead ends: 46 [2021-10-13 18:43:50,461 INFO L226 Difference]: Without dead ends: 42 [2021-10-13 18:43:50,462 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 123.7ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-10-13 18:43:50,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-10-13 18:43:50,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 32. [2021-10-13 18:43:50,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.903225806451613) internal successors, (59), 31 states have internal predecessors, (59), 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 18:43:50,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 59 transitions. [2021-10-13 18:43:50,466 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 59 transitions. Word has length 14 [2021-10-13 18:43:50,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 18:43:50,466 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 59 transitions. [2021-10-13 18:43:50,467 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 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 18:43:50,467 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 59 transitions. [2021-10-13 18:43:50,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-13 18:43:50,467 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 18:43:50,468 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 18:43:50,537 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-10-13 18:43:50,701 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 18:43:50,701 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 18:43:50,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 18:43:50,702 INFO L82 PathProgramCache]: Analyzing trace with hash 460443558, now seen corresponding path program 5 times [2021-10-13 18:43:50,702 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 18:43:50,703 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328765276] [2021-10-13 18:43:50,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 18:43:50,704 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 18:43:50,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 18:43:51,054 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 18:43:51,054 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 18:43:51,055 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328765276] [2021-10-13 18:43:51,055 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [328765276] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 18:43:51,055 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [636330234] [2021-10-13 18:43:51,055 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-13 18:43:51,056 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 18:43:51,056 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 18:43:51,057 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 18:43:51,080 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 18:43:51,248 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-10-13 18:43:51,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 18:43:51,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-13 18:43:51,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 18:43:51,406 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 18:43:51,407 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [636330234] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 18:43:51,407 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-13 18:43:51,407 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4] total 9 [2021-10-13 18:43:51,407 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644990816] [2021-10-13 18:43:51,411 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 18:43:51,411 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 18:43:51,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 18:43:51,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-10-13 18:43:51,413 INFO L87 Difference]: Start difference. First operand 32 states and 59 transitions. Second operand has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 18:43:51,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 18:43:51,440 INFO L93 Difference]: Finished difference Result 45 states and 73 transitions. [2021-10-13 18:43:51,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-13 18:43:51,443 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-10-13 18:43:51,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 18:43:51,444 INFO L225 Difference]: With dead ends: 45 [2021-10-13 18:43:51,444 INFO L226 Difference]: Without dead ends: 36 [2021-10-13 18:43:51,444 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 194.0ms TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-10-13 18:43:51,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-10-13 18:43:51,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 28. [2021-10-13 18:43:51,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.7407407407407407) internal successors, (47), 27 states have internal predecessors, (47), 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 18:43:51,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 47 transitions. [2021-10-13 18:43:51,454 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 47 transitions. Word has length 14 [2021-10-13 18:43:51,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 18:43:51,454 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 47 transitions. [2021-10-13 18:43:51,454 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 18:43:51,454 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 47 transitions. [2021-10-13 18:43:51,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-13 18:43:51,455 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 18:43:51,455 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 18:43:51,509 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-10-13 18:43:51,670 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 18:43:51,670 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 18:43:51,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 18:43:51,671 INFO L82 PathProgramCache]: Analyzing trace with hash 139594488, now seen corresponding path program 6 times [2021-10-13 18:43:51,671 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 18:43:51,671 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484420670] [2021-10-13 18:43:51,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 18:43:51,672 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 18:43:51,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 18:43:51,799 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 18:43:51,800 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 18:43:51,800 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484420670] [2021-10-13 18:43:51,800 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1484420670] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 18:43:51,800 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [693363376] [2021-10-13 18:43:51,801 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-13 18:43:51,801 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 18:43:51,801 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 18:43:51,802 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 18:43:51,813 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 18:43:51,946 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-10-13 18:43:51,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 18:43:51,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-13 18:43:51,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 18:43:52,211 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 18:43:52,212 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [693363376] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 18:43:52,212 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-13 18:43:52,212 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 10 [2021-10-13 18:43:52,212 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79161778] [2021-10-13 18:43:52,213 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 18:43:52,213 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 18:43:52,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 18:43:52,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-10-13 18:43:52,215 INFO L87 Difference]: Start difference. First operand 28 states and 47 transitions. Second operand has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 18:43:52,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 18:43:52,234 INFO L93 Difference]: Finished difference Result 33 states and 51 transitions. [2021-10-13 18:43:52,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-13 18:43:52,235 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-10-13 18:43:52,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 18:43:52,235 INFO L225 Difference]: With dead ends: 33 [2021-10-13 18:43:52,235 INFO L226 Difference]: Without dead ends: 20 [2021-10-13 18:43:52,236 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 68.8ms TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-10-13 18:43:52,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-10-13 18:43:52,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2021-10-13 18:43:52,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 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 18:43:52,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 28 transitions. [2021-10-13 18:43:52,242 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 28 transitions. Word has length 14 [2021-10-13 18:43:52,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 18:43:52,243 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 28 transitions. [2021-10-13 18:43:52,243 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 18:43:52,243 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 28 transitions. [2021-10-13 18:43:52,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-13 18:43:52,245 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 18:43:52,245 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 18:43:52,296 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 18:43:52,460 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 18:43:52,460 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-13 18:43:52,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 18:43:52,461 INFO L82 PathProgramCache]: Analyzing trace with hash 113153584, now seen corresponding path program 7 times [2021-10-13 18:43:52,461 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 18:43:52,461 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548934768] [2021-10-13 18:43:52,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 18:43:52,461 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 18:43:52,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 18:43:52,555 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 18:43:52,558 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 18:43:52,558 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548934768] [2021-10-13 18:43:52,558 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548934768] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 18:43:52,559 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [768866993] [2021-10-13 18:43:52,559 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-13 18:43:52,559 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 18:43:52,559 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 18:43:52,576 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 18:43:52,634 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-10-13 18:43:52,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 18:43:52,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-13 18:43:52,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 18:43:52,865 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 18:43:52,866 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [768866993] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 18:43:52,869 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-13 18:43:52,869 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 10 [2021-10-13 18:43:52,870 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965561027] [2021-10-13 18:43:52,871 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 18:43:52,873 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 18:43:52,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 18:43:52,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-10-13 18:43:52,874 INFO L87 Difference]: Start difference. First operand 20 states and 28 transitions. Second operand has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 18:43:52,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 18:43:52,888 INFO L93 Difference]: Finished difference Result 19 states and 27 transitions. [2021-10-13 18:43:52,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-13 18:43:52,889 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-10-13 18:43:52,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 18:43:52,891 INFO L225 Difference]: With dead ends: 19 [2021-10-13 18:43:52,891 INFO L226 Difference]: Without dead ends: 0 [2021-10-13 18:43:52,891 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 43.1ms TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-10-13 18:43:52,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-13 18:43:52,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-13 18:43:52,892 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 18:43:52,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-13 18:43:52,892 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 14 [2021-10-13 18:43:52,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 18:43:52,893 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-13 18:43:52,893 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 18:43:52,893 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-13 18:43:52,893 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-13 18:43:52,898 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-13 18:43:52,898 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATION [2021-10-13 18:43:52,899 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATION [2021-10-13 18:43:52,937 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-10-13 18:43:53,116 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 18:43:53,121 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-10-13 18:43:53,121 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-13 18:43:53,133 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.10 06:43:53 BasicIcfg [2021-10-13 18:43:53,133 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-13 18:43:53,134 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-13 18:43:53,134 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-13 18:43:53,134 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-13 18:43:53,135 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 06:43:39" (3/4) ... [2021-10-13 18:43:53,142 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-13 18:43:53,156 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure thread1 [2021-10-13 18:43:53,157 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure thread2 [2021-10-13 18:43:53,168 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 14 nodes and edges [2021-10-13 18:43:53,168 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-10-13 18:43:53,168 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-13 18:43:53,169 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-13 18:43:53,241 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-10-13 18:43:53,241 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-13 18:43:53,243 INFO L168 Benchmark]: Toolchain (without parser) took 15060.01 ms. Allocated memory was 48.2 MB in the beginning and 104.9 MB in the end (delta: 56.6 MB). Free memory was 25.0 MB in the beginning and 52.0 MB in the end (delta: -27.0 MB). Peak memory consumption was 32.6 MB. Max. memory is 16.1 GB. [2021-10-13 18:43:53,244 INFO L168 Benchmark]: CDTParser took 0.31 ms. Allocated memory is still 48.2 MB. Free memory is still 32.1 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 18:43:53,244 INFO L168 Benchmark]: CACSL2BoogieTranslator took 266.86 ms. Allocated memory is still 48.2 MB. Free memory was 24.8 MB in the beginning and 26.1 MB in the end (delta: -1.3 MB). Peak memory consumption was 7.6 MB. Max. memory is 16.1 GB. [2021-10-13 18:43:53,247 INFO L168 Benchmark]: Boogie Procedure Inliner took 41.38 ms. Allocated memory is still 48.2 MB. Free memory was 26.1 MB in the beginning and 24.6 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 18:43:53,248 INFO L168 Benchmark]: Boogie Preprocessor took 28.02 ms. Allocated memory is still 48.2 MB. Free memory was 24.6 MB in the beginning and 23.5 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 18:43:53,248 INFO L168 Benchmark]: RCFGBuilder took 525.11 ms. Allocated memory is still 48.2 MB. Free memory was 23.4 MB in the beginning and 24.2 MB in the end (delta: -788.1 kB). Peak memory consumption was 3.4 MB. Max. memory is 16.1 GB. [2021-10-13 18:43:53,249 INFO L168 Benchmark]: TraceAbstraction took 14063.94 ms. Allocated memory was 48.2 MB in the beginning and 104.9 MB in the end (delta: 56.6 MB). Free memory was 23.6 MB in the beginning and 55.2 MB in the end (delta: -31.6 MB). Peak memory consumption was 23.8 MB. Max. memory is 16.1 GB. [2021-10-13 18:43:53,249 INFO L168 Benchmark]: Witness Printer took 107.63 ms. Allocated memory is still 104.9 MB. Free memory was 55.2 MB in the beginning and 52.0 MB in the end (delta: 3.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-13 18:43:53,254 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31 ms. Allocated memory is still 48.2 MB. Free memory is still 32.1 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 266.86 ms. Allocated memory is still 48.2 MB. Free memory was 24.8 MB in the beginning and 26.1 MB in the end (delta: -1.3 MB). Peak memory consumption was 7.6 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 41.38 ms. Allocated memory is still 48.2 MB. Free memory was 26.1 MB in the beginning and 24.6 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 28.02 ms. Allocated memory is still 48.2 MB. Free memory was 24.6 MB in the beginning and 23.5 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 525.11 ms. Allocated memory is still 48.2 MB. Free memory was 23.4 MB in the beginning and 24.2 MB in the end (delta: -788.1 kB). Peak memory consumption was 3.4 MB. Max. memory is 16.1 GB. * TraceAbstraction took 14063.94 ms. Allocated memory was 48.2 MB in the beginning and 104.9 MB in the end (delta: 56.6 MB). Free memory was 23.6 MB in the beginning and 55.2 MB in the end (delta: -31.6 MB). Peak memory consumption was 23.8 MB. Max. memory is 16.1 GB. * Witness Printer took 107.63 ms. Allocated memory is still 104.9 MB. Free memory was 55.2 MB in the beginning and 52.0 MB in the end (delta: 3.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 3283.1ms, 77 PlacesBefore, 21 PlacesAfterwards, 76 TransitionsBefore, 16 TransitionsAfterwards, 368 CoEnabledTransitionPairs, 6 FixpointIterations, 42 TrivialSequentialCompositions, 15 ConcurrentSequentialCompositions, 4 TrivialYvCompositions, 4 ConcurrentYvCompositions, 4 ChoiceCompositions, 69 TotalNumberOfCompositions, 382 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 382, positive: 382, positive conditional: 0, positive unconditional: 382, 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: 273, positive: 273, positive conditional: 0, positive unconditional: 273, 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: 273, positive: 273, positive conditional: 0, positive unconditional: 273, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 382, positive: 109, positive conditional: 0, positive unconditional: 109, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 273, unknown conditional: 0, unknown unconditional: 273] , 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: 70]: 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, 87 locations, 3 error locations. Started 1 CEGAR loops. OverallTime: 13849.1ms, OverallIterations: 11, TraceHistogramMax: 2, EmptinessCheckTime: 23.0ms, AutomataDifference: 775.5ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 3377.2ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 176 SDtfs, 215 SDslu, 205 SDs, 0 SdLazy, 226 SolverSat, 21 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 349.9ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 161 GetRequests, 96 SyntacticMatches, 2 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 1303.6ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=52occurred in iteration=4, InterpolantAutomatonStates: 61, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 144.4ms AutomataMinimizationTime, 11 MinimizatonAttempts, 102 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 123.8ms SsaConstructionTime, 791.7ms SatisfiabilityAnalysisTime, 5019.3ms InterpolantComputationTime, 267 NumberOfCodeBlocks, 267 NumberOfCodeBlocksAsserted, 28 NumberOfCheckSat, 247 ConstructedInterpolants, 0 QuantifiedInterpolants, 1131 SizeOfPredicates, 7 NumberOfNonLiveVariables, 861 ConjunctsInSsa, 103 ConjunctsInUnsatCore, 20 InterpolantComputations, 8 PerfectInterpolantSequences, 43/61 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 18:43:53,352 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...