./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-acceleration/array_3-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 57096758 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_174de2b6-03b4-4cef-80b4-1dfeecda5d19/bin/uautomizer-hJ6jxDFKc3/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_174de2b6-03b4-4cef-80b4-1dfeecda5d19/bin/uautomizer-hJ6jxDFKc3/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_174de2b6-03b4-4cef-80b4-1dfeecda5d19/bin/uautomizer-hJ6jxDFKc3/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_174de2b6-03b4-4cef-80b4-1dfeecda5d19/bin/uautomizer-hJ6jxDFKc3/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loop-acceleration/array_3-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_174de2b6-03b4-4cef-80b4-1dfeecda5d19/bin/uautomizer-hJ6jxDFKc3/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_174de2b6-03b4-4cef-80b4-1dfeecda5d19/bin/uautomizer-hJ6jxDFKc3 --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 e274006309db7a6ae6e7d3a14420548e35b766ad ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-5709675 [2021-10-15 19:11:23,950 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-15 19:11:23,953 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-15 19:11:24,011 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-15 19:11:24,012 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-15 19:11:24,016 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-15 19:11:24,018 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-15 19:11:24,021 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-15 19:11:24,024 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-15 19:11:24,032 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-15 19:11:24,033 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-15 19:11:24,036 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-15 19:11:24,037 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-15 19:11:24,041 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-15 19:11:24,043 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-15 19:11:24,048 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-15 19:11:24,050 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-15 19:11:24,051 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-15 19:11:24,053 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-15 19:11:24,062 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-15 19:11:24,065 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-15 19:11:24,066 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-15 19:11:24,072 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-15 19:11:24,073 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-15 19:11:24,080 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-15 19:11:24,085 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-15 19:11:24,085 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-15 19:11:24,086 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-15 19:11:24,088 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-15 19:11:24,089 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-15 19:11:24,090 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-15 19:11:24,091 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-15 19:11:24,093 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-15 19:11:24,094 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-15 19:11:24,095 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-15 19:11:24,096 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-15 19:11:24,096 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-15 19:11:24,097 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-15 19:11:24,097 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-15 19:11:24,098 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-15 19:11:24,098 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-15 19:11:24,099 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_174de2b6-03b4-4cef-80b4-1dfeecda5d19/bin/uautomizer-hJ6jxDFKc3/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-15 19:11:24,139 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-15 19:11:24,139 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-15 19:11:24,140 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-15 19:11:24,140 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-15 19:11:24,147 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-15 19:11:24,148 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-15 19:11:24,148 INFO L138 SettingsManager]: * Use SBE=true [2021-10-15 19:11:24,148 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-15 19:11:24,149 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-15 19:11:24,149 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-15 19:11:24,150 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-15 19:11:24,150 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-15 19:11:24,150 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-15 19:11:24,151 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-15 19:11:24,151 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-15 19:11:24,151 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-15 19:11:24,151 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-15 19:11:24,152 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-15 19:11:24,152 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-15 19:11:24,152 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-15 19:11:24,152 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-15 19:11:24,153 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-15 19:11:24,153 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-15 19:11:24,153 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-15 19:11:24,153 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-15 19:11:24,154 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-15 19:11:24,154 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-15 19:11:24,154 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-15 19:11:24,154 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-10-15 19:11:24,156 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-10-15 19:11:24,156 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-15 19:11:24,157 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-15 19:11:24,157 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:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_174de2b6-03b4-4cef-80b4-1dfeecda5d19/bin/uautomizer-hJ6jxDFKc3/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_174de2b6-03b4-4cef-80b4-1dfeecda5d19/bin/uautomizer-hJ6jxDFKc3 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e274006309db7a6ae6e7d3a14420548e35b766ad [2021-10-15 19:11:24,429 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-15 19:11:24,461 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-15 19:11:24,464 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-15 19:11:24,465 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-15 19:11:24,466 INFO L275 PluginConnector]: CDTParser initialized [2021-10-15 19:11:24,467 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_174de2b6-03b4-4cef-80b4-1dfeecda5d19/bin/uautomizer-hJ6jxDFKc3/../../sv-benchmarks/c/loop-acceleration/array_3-1.i [2021-10-15 19:11:24,557 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_174de2b6-03b4-4cef-80b4-1dfeecda5d19/bin/uautomizer-hJ6jxDFKc3/data/b06e8ea7e/04dc21b294644ae69dc9e7fe7ed77fe4/FLAG5debc3410 [2021-10-15 19:11:25,039 INFO L306 CDTParser]: Found 1 translation units. [2021-10-15 19:11:25,041 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_174de2b6-03b4-4cef-80b4-1dfeecda5d19/sv-benchmarks/c/loop-acceleration/array_3-1.i [2021-10-15 19:11:25,046 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_174de2b6-03b4-4cef-80b4-1dfeecda5d19/bin/uautomizer-hJ6jxDFKc3/data/b06e8ea7e/04dc21b294644ae69dc9e7fe7ed77fe4/FLAG5debc3410 [2021-10-15 19:11:25,423 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_174de2b6-03b4-4cef-80b4-1dfeecda5d19/bin/uautomizer-hJ6jxDFKc3/data/b06e8ea7e/04dc21b294644ae69dc9e7fe7ed77fe4 [2021-10-15 19:11:25,425 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-15 19:11:25,428 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-15 19:11:25,432 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-15 19:11:25,432 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-15 19:11:25,439 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-15 19:11:25,440 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 07:11:25" (1/1) ... [2021-10-15 19:11:25,441 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@26504ae3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:11:25, skipping insertion in model container [2021-10-15 19:11:25,442 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 07:11:25" (1/1) ... [2021-10-15 19:11:25,448 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-15 19:11:25,462 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-15 19:11:25,636 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_174de2b6-03b4-4cef-80b4-1dfeecda5d19/sv-benchmarks/c/loop-acceleration/array_3-1.i[849,862] [2021-10-15 19:11:25,653 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-15 19:11:25,661 INFO L203 MainTranslator]: Completed pre-run [2021-10-15 19:11:25,682 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_174de2b6-03b4-4cef-80b4-1dfeecda5d19/sv-benchmarks/c/loop-acceleration/array_3-1.i[849,862] [2021-10-15 19:11:25,689 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-15 19:11:25,705 INFO L208 MainTranslator]: Completed translation [2021-10-15 19:11:25,706 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:11:25 WrapperNode [2021-10-15 19:11:25,706 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-15 19:11:25,707 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-15 19:11:25,708 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-15 19:11:25,708 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-15 19:11:25,715 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:11:25" (1/1) ... [2021-10-15 19:11:25,723 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:11:25" (1/1) ... [2021-10-15 19:11:25,743 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-15 19:11:25,744 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-15 19:11:25,744 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-15 19:11:25,744 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-15 19:11:25,752 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:11:25" (1/1) ... [2021-10-15 19:11:25,752 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:11:25" (1/1) ... [2021-10-15 19:11:25,763 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:11:25" (1/1) ... [2021-10-15 19:11:25,763 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:11:25" (1/1) ... [2021-10-15 19:11:25,775 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:11:25" (1/1) ... [2021-10-15 19:11:25,783 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:11:25" (1/1) ... [2021-10-15 19:11:25,785 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:11:25" (1/1) ... [2021-10-15 19:11:25,788 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-15 19:11:25,789 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-15 19:11:25,789 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-15 19:11:25,790 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-15 19:11:25,791 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:11:25" (1/1) ... [2021-10-15 19:11:25,799 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-15 19:11:25,814 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_174de2b6-03b4-4cef-80b4-1dfeecda5d19/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:11:25,834 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_174de2b6-03b4-4cef-80b4-1dfeecda5d19/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-15 19:11:25,852 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_174de2b6-03b4-4cef-80b4-1dfeecda5d19/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-15 19:11:25,872 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-15 19:11:25,873 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-15 19:11:25,873 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-15 19:11:25,873 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-15 19:11:25,873 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-15 19:11:25,873 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-15 19:11:25,873 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-15 19:11:26,052 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-15 19:11:26,053 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2021-10-15 19:11:26,054 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:11:26 BoogieIcfgContainer [2021-10-15 19:11:26,055 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-15 19:11:26,057 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-15 19:11:26,057 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-15 19:11:26,064 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-15 19:11:26,064 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 07:11:25" (1/3) ... [2021-10-15 19:11:26,065 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79ed4c37 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 07:11:26, skipping insertion in model container [2021-10-15 19:11:26,065 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:11:25" (2/3) ... [2021-10-15 19:11:26,066 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79ed4c37 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 07:11:26, skipping insertion in model container [2021-10-15 19:11:26,066 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:11:26" (3/3) ... [2021-10-15 19:11:26,067 INFO L111 eAbstractionObserver]: Analyzing ICFG array_3-1.i [2021-10-15 19:11:26,080 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-15 19:11:26,081 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-15 19:11:26,148 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-15 19:11:26,159 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=PETRI_NET, 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 [2021-10-15 19:11:26,160 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-15 19:11:26,172 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 17 places, 22 transitions, 44 flow [2021-10-15 19:11:26,190 INFO L129 PetriNetUnfolder]: 6/22 cut-off events. [2021-10-15 19:11:26,190 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 19:11:26,191 INFO L84 FinitePrefix]: Finished finitePrefix Result has 23 conditions, 22 events. 6/22 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 18 event pairs, 0 based on Foata normal form. 0/15 useless extension candidates. Maximal degree in co-relation 0. Up to 3 conditions per place. [2021-10-15 19:11:26,192 INFO L82 GeneralOperation]: Start removeDead. Operand has 17 places, 22 transitions, 44 flow [2021-10-15 19:11:26,195 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 13 places, 17 transitions, 34 flow [2021-10-15 19:11:26,199 INFO L129 PetriNetUnfolder]: 5/16 cut-off events. [2021-10-15 19:11:26,199 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 19:11:26,200 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:11:26,200 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:11:26,201 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:11:26,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:11:26,206 INFO L82 PathProgramCache]: Analyzing trace with hash 212411183, now seen corresponding path program 1 times [2021-10-15 19:11:26,215 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:11:26,216 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366716853] [2021-10-15 19:11:26,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:11:26,217 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:11:26,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:11:26,368 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:11:26,369 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:11:26,369 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366716853] [2021-10-15 19:11:26,370 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1366716853] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:11:26,370 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:11:26,370 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 19:11:26,372 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155240921] [2021-10-15 19:11:26,381 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:11:26,381 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:11:26,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:11:26,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:11:26,409 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 22 [2021-10-15 19:11:26,423 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 13 places, 17 transitions, 34 flow. Second operand has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:11:26,423 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:11:26,423 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 22 [2021-10-15 19:11:26,425 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:11:26,479 INFO L129 PetriNetUnfolder]: 3/25 cut-off events. [2021-10-15 19:11:26,480 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 19:11:26,480 INFO L84 FinitePrefix]: Finished finitePrefix Result has 43 conditions, 25 events. 3/25 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 16 event pairs, 0 based on Foata normal form. 0/21 useless extension candidates. Maximal degree in co-relation 0. Up to 11 conditions per place. [2021-10-15 19:11:26,481 INFO L132 encePairwiseOnDemand]: 14/22 looper letters, 12 selfloop transitions, 4 changer transitions 0/21 dead transitions. [2021-10-15 19:11:26,481 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 15 places, 21 transitions, 74 flow [2021-10-15 19:11:26,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:11:26,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:11:26,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 49 transitions. [2021-10-15 19:11:26,492 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7424242424242424 [2021-10-15 19:11:26,493 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 49 transitions. [2021-10-15 19:11:26,493 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 49 transitions. [2021-10-15 19:11:26,494 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:11:26,497 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 49 transitions. [2021-10-15 19:11:26,499 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:11:26,502 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:11:26,503 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:11:26,505 INFO L186 Difference]: Start difference. First operand has 13 places, 17 transitions, 34 flow. Second operand 3 states and 49 transitions. [2021-10-15 19:11:26,506 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 15 places, 21 transitions, 74 flow [2021-10-15 19:11:26,507 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 15 places, 21 transitions, 74 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-10-15 19:11:26,510 INFO L242 Difference]: Finished difference. Result has 16 places, 17 transitions, 54 flow [2021-10-15 19:11:26,512 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=30, PETRI_DIFFERENCE_MINUEND_PLACES=13, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=54, PETRI_PLACES=16, PETRI_TRANSITIONS=17} [2021-10-15 19:11:26,513 INFO L334 CegarLoopForPetriNet]: 13 programPoint places, 3 predicate places. [2021-10-15 19:11:26,513 INFO L470 AbstractCegarLoop]: Abstraction has has 16 places, 17 transitions, 54 flow [2021-10-15 19:11:26,513 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:11:26,513 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:11:26,514 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:11:26,514 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-15 19:11:26,514 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:11:26,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:11:26,515 INFO L82 PathProgramCache]: Analyzing trace with hash 1562587830, now seen corresponding path program 1 times [2021-10-15 19:11:26,515 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:11:26,515 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536263112] [2021-10-15 19:11:26,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:11:26,516 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:11:26,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:11:26,567 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:11:26,567 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:11:26,568 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536263112] [2021-10-15 19:11:26,568 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1536263112] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:11:26,568 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1777267120] [2021-10-15 19:11:26,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:11:26,569 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:11:26,569 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_174de2b6-03b4-4cef-80b4-1dfeecda5d19/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:11:26,571 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_174de2b6-03b4-4cef-80b4-1dfeecda5d19/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:11:26,610 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_174de2b6-03b4-4cef-80b4-1dfeecda5d19/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-15 19:11:26,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:11:26,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-15 19:11:26,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:11:26,767 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:11:26,768 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1777267120] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:11:26,768 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-15 19:11:26,768 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-10-15 19:11:26,769 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638439597] [2021-10-15 19:11:26,786 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-15 19:11:26,787 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:11:26,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-15 19:11:26,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-10-15 19:11:26,789 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 22 [2021-10-15 19:11:26,789 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 16 places, 17 transitions, 54 flow. Second operand has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:11:26,790 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:11:26,790 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 22 [2021-10-15 19:11:26,790 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:11:26,884 INFO L129 PetriNetUnfolder]: 3/35 cut-off events. [2021-10-15 19:11:26,884 INFO L130 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2021-10-15 19:11:26,885 INFO L84 FinitePrefix]: Finished finitePrefix Result has 73 conditions, 35 events. 3/35 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 22 event pairs, 0 based on Foata normal form. 2/34 useless extension candidates. Maximal degree in co-relation 29. Up to 11 conditions per place. [2021-10-15 19:11:26,886 INFO L132 encePairwiseOnDemand]: 16/22 looper letters, 16 selfloop transitions, 6 changer transitions 0/27 dead transitions. [2021-10-15 19:11:26,886 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 19 places, 27 transitions, 122 flow [2021-10-15 19:11:26,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-15 19:11:26,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-10-15 19:11:26,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 60 transitions. [2021-10-15 19:11:26,890 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6818181818181818 [2021-10-15 19:11:26,890 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 60 transitions. [2021-10-15 19:11:26,890 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 60 transitions. [2021-10-15 19:11:26,891 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:11:26,891 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 60 transitions. [2021-10-15 19:11:26,892 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:11:26,896 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 22.0) internal successors, (110), 5 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:11:26,896 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 22.0) internal successors, (110), 5 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:11:26,897 INFO L186 Difference]: Start difference. First operand has 16 places, 17 transitions, 54 flow. Second operand 4 states and 60 transitions. [2021-10-15 19:11:26,897 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 19 places, 27 transitions, 122 flow [2021-10-15 19:11:26,899 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 18 places, 27 transitions, 118 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-10-15 19:11:26,903 INFO L242 Difference]: Finished difference. Result has 19 places, 19 transitions, 82 flow [2021-10-15 19:11:26,903 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=15, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=82, PETRI_PLACES=19, PETRI_TRANSITIONS=19} [2021-10-15 19:11:26,904 INFO L334 CegarLoopForPetriNet]: 13 programPoint places, 6 predicate places. [2021-10-15 19:11:26,904 INFO L470 AbstractCegarLoop]: Abstraction has has 19 places, 19 transitions, 82 flow [2021-10-15 19:11:26,904 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:11:26,905 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:11:26,905 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:11:26,939 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_174de2b6-03b4-4cef-80b4-1dfeecda5d19/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-15 19:11:27,124 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_174de2b6-03b4-4cef-80b4-1dfeecda5d19/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:11:27,125 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:11:27,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:11:27,125 INFO L82 PathProgramCache]: Analyzing trace with hash -1568667532, now seen corresponding path program 2 times [2021-10-15 19:11:27,126 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:11:27,126 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177833586] [2021-10-15 19:11:27,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:11:27,126 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:11:27,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:11:27,196 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-15 19:11:27,196 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:11:27,197 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177833586] [2021-10-15 19:11:27,197 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177833586] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:11:27,197 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:11:27,197 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-15 19:11:27,197 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817207915] [2021-10-15 19:11:27,198 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-15 19:11:27,198 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:11:27,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-15 19:11:27,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-15 19:11:27,200 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 22 [2021-10-15 19:11:27,200 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 19 places, 19 transitions, 82 flow. Second operand has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:11:27,201 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:11:27,201 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 22 [2021-10-15 19:11:27,201 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:11:27,237 INFO L129 PetriNetUnfolder]: 3/33 cut-off events. [2021-10-15 19:11:27,238 INFO L130 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2021-10-15 19:11:27,238 INFO L84 FinitePrefix]: Finished finitePrefix Result has 84 conditions, 33 events. 3/33 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 18 event pairs, 0 based on Foata normal form. 1/31 useless extension candidates. Maximal degree in co-relation 19. Up to 15 conditions per place. [2021-10-15 19:11:27,238 INFO L132 encePairwiseOnDemand]: 14/22 looper letters, 8 selfloop transitions, 10 changer transitions 1/23 dead transitions. [2021-10-15 19:11:27,239 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 23 transitions, 128 flow [2021-10-15 19:11:27,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-15 19:11:27,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-10-15 19:11:27,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 44 transitions. [2021-10-15 19:11:27,240 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5 [2021-10-15 19:11:27,240 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 44 transitions. [2021-10-15 19:11:27,241 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 44 transitions. [2021-10-15 19:11:27,241 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:11:27,241 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 44 transitions. [2021-10-15 19:11:27,242 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:11:27,243 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 22.0) internal successors, (110), 5 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:11:27,243 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 22.0) internal successors, (110), 5 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:11:27,243 INFO L186 Difference]: Start difference. First operand has 19 places, 19 transitions, 82 flow. Second operand 4 states and 44 transitions. [2021-10-15 19:11:27,243 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 23 transitions, 128 flow [2021-10-15 19:11:27,245 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 20 places, 23 transitions, 116 flow, removed 2 selfloop flow, removed 2 redundant places. [2021-10-15 19:11:27,248 INFO L242 Difference]: Finished difference. Result has 23 places, 21 transitions, 122 flow [2021-10-15 19:11:27,250 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=17, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=9, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=122, PETRI_PLACES=23, PETRI_TRANSITIONS=21} [2021-10-15 19:11:27,251 INFO L334 CegarLoopForPetriNet]: 13 programPoint places, 10 predicate places. [2021-10-15 19:11:27,251 INFO L470 AbstractCegarLoop]: Abstraction has has 23 places, 21 transitions, 122 flow [2021-10-15 19:11:27,251 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:11:27,251 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:11:27,252 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:11:27,252 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-15 19:11:27,252 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:11:27,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:11:27,254 INFO L82 PathProgramCache]: Analyzing trace with hash 1592576845, now seen corresponding path program 1 times [2021-10-15 19:11:27,255 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:11:27,255 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986433476] [2021-10-15 19:11:27,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:11:27,256 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:11:27,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:11:27,372 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-15 19:11:27,375 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:11:27,375 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986433476] [2021-10-15 19:11:27,375 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986433476] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:11:27,376 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1737033394] [2021-10-15 19:11:27,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:11:27,376 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:11:27,376 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_174de2b6-03b4-4cef-80b4-1dfeecda5d19/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:11:27,379 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_174de2b6-03b4-4cef-80b4-1dfeecda5d19/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:11:27,399 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_174de2b6-03b4-4cef-80b4-1dfeecda5d19/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-15 19:11:27,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:11:27,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-15 19:11:27,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:11:27,494 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-15 19:11:27,495 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1737033394] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:11:27,495 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-15 19:11:27,495 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-10-15 19:11:27,495 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506235113] [2021-10-15 19:11:27,496 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-15 19:11:27,496 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:11:27,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-15 19:11:27,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-10-15 19:11:27,498 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 22 [2021-10-15 19:11:27,498 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 21 transitions, 122 flow. Second operand has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:11:27,498 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:11:27,498 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 22 [2021-10-15 19:11:27,498 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:11:27,566 INFO L129 PetriNetUnfolder]: 3/38 cut-off events. [2021-10-15 19:11:27,566 INFO L130 PetriNetUnfolder]: For 36/36 co-relation queries the response was YES. [2021-10-15 19:11:27,566 INFO L84 FinitePrefix]: Finished finitePrefix Result has 131 conditions, 38 events. 3/38 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 15 event pairs, 0 based on Foata normal form. 4/38 useless extension candidates. Maximal degree in co-relation 120. Up to 12 conditions per place. [2021-10-15 19:11:27,567 INFO L132 encePairwiseOnDemand]: 14/22 looper letters, 18 selfloop transitions, 8 changer transitions 2/32 dead transitions. [2021-10-15 19:11:27,567 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 32 transitions, 236 flow [2021-10-15 19:11:27,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-15 19:11:27,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-10-15 19:11:27,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 81 transitions. [2021-10-15 19:11:27,569 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.525974025974026 [2021-10-15 19:11:27,569 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 81 transitions. [2021-10-15 19:11:27,569 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 81 transitions. [2021-10-15 19:11:27,570 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:11:27,570 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 81 transitions. [2021-10-15 19:11:27,571 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:11:27,572 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 22.0) internal successors, (176), 8 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:11:27,572 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 22.0) internal successors, (176), 8 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:11:27,572 INFO L186 Difference]: Start difference. First operand has 23 places, 21 transitions, 122 flow. Second operand 7 states and 81 transitions. [2021-10-15 19:11:27,573 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 32 transitions, 236 flow [2021-10-15 19:11:27,575 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 32 transitions, 202 flow, removed 1 selfloop flow, removed 3 redundant places. [2021-10-15 19:11:27,577 INFO L242 Difference]: Finished difference. Result has 29 places, 23 transitions, 156 flow [2021-10-15 19:11:27,577 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=156, PETRI_PLACES=29, PETRI_TRANSITIONS=23} [2021-10-15 19:11:27,577 INFO L334 CegarLoopForPetriNet]: 13 programPoint places, 16 predicate places. [2021-10-15 19:11:27,577 INFO L470 AbstractCegarLoop]: Abstraction has has 29 places, 23 transitions, 156 flow [2021-10-15 19:11:27,578 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:11:27,578 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:11:27,578 INFO L254 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:11:27,615 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_174de2b6-03b4-4cef-80b4-1dfeecda5d19/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-15 19:11:27,793 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_174de2b6-03b4-4cef-80b4-1dfeecda5d19/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:11:27,794 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:11:27,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:11:27,794 INFO L82 PathProgramCache]: Analyzing trace with hash -834386755, now seen corresponding path program 2 times [2021-10-15 19:11:27,794 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:11:27,795 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264041184] [2021-10-15 19:11:27,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:11:27,795 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:11:27,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:11:27,864 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-10-15 19:11:27,864 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:11:27,864 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264041184] [2021-10-15 19:11:27,864 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264041184] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:11:27,865 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:11:27,865 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-15 19:11:27,865 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070397007] [2021-10-15 19:11:27,865 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-15 19:11:27,865 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:11:27,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-15 19:11:27,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-15 19:11:27,867 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 22 [2021-10-15 19:11:27,867 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 23 transitions, 156 flow. Second operand has 5 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:11:27,867 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:11:27,867 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 22 [2021-10-15 19:11:27,867 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:11:27,901 INFO L129 PetriNetUnfolder]: 3/34 cut-off events. [2021-10-15 19:11:27,901 INFO L130 PetriNetUnfolder]: For 54/54 co-relation queries the response was YES. [2021-10-15 19:11:27,901 INFO L84 FinitePrefix]: Finished finitePrefix Result has 126 conditions, 34 events. 3/34 cut-off events. For 54/54 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 10 event pairs, 0 based on Foata normal form. 1/31 useless extension candidates. Maximal degree in co-relation 116. Up to 12 conditions per place. [2021-10-15 19:11:27,901 INFO L132 encePairwiseOnDemand]: 14/22 looper letters, 0 selfloop transitions, 0 changer transitions 23/23 dead transitions. [2021-10-15 19:11:27,902 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 23 transitions, 194 flow [2021-10-15 19:11:27,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-15 19:11:27,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-10-15 19:11:27,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 51 transitions. [2021-10-15 19:11:27,903 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.4636363636363636 [2021-10-15 19:11:27,903 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 51 transitions. [2021-10-15 19:11:27,903 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 51 transitions. [2021-10-15 19:11:27,904 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:11:27,904 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 51 transitions. [2021-10-15 19:11:27,904 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:11:27,905 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 22.0) internal successors, (132), 6 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:11:27,905 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 22.0) internal successors, (132), 6 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:11:27,905 INFO L186 Difference]: Start difference. First operand has 29 places, 23 transitions, 156 flow. Second operand 5 states and 51 transitions. [2021-10-15 19:11:27,906 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 23 transitions, 194 flow [2021-10-15 19:11:27,908 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 23 transitions, 174 flow, removed 4 selfloop flow, removed 3 redundant places. [2021-10-15 19:11:27,909 INFO L242 Difference]: Finished difference. Result has 26 places, 0 transitions, 0 flow [2021-10-15 19:11:27,909 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=0, PETRI_PLACES=26, PETRI_TRANSITIONS=0} [2021-10-15 19:11:27,909 INFO L334 CegarLoopForPetriNet]: 13 programPoint places, 13 predicate places. [2021-10-15 19:11:27,909 INFO L470 AbstractCegarLoop]: Abstraction has has 26 places, 0 transitions, 0 flow [2021-10-15 19:11:27,910 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:11:27,912 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-15 19:11:27,912 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-15 19:11:27,917 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-15 19:11:27,920 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.10 07:11:27 BoogieIcfgContainer [2021-10-15 19:11:27,920 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-15 19:11:27,921 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-15 19:11:27,921 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-15 19:11:27,921 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-15 19:11:27,922 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:11:26" (3/4) ... [2021-10-15 19:11:27,924 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-15 19:11:27,933 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 8 nodes and edges [2021-10-15 19:11:27,934 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-10-15 19:11:27,934 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-10-15 19:11:27,934 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-15 19:11:27,985 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_174de2b6-03b4-4cef-80b4-1dfeecda5d19/bin/uautomizer-hJ6jxDFKc3/witness.graphml [2021-10-15 19:11:27,985 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-15 19:11:27,989 INFO L168 Benchmark]: Toolchain (without parser) took 2557.58 ms. Allocated memory was 98.6 MB in the beginning and 119.5 MB in the end (delta: 21.0 MB). Free memory was 66.0 MB in the beginning and 59.7 MB in the end (delta: 6.3 MB). Peak memory consumption was 27.0 MB. Max. memory is 16.1 GB. [2021-10-15 19:11:27,990 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 98.6 MB. Free memory is still 54.9 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-15 19:11:27,991 INFO L168 Benchmark]: CACSL2BoogieTranslator took 274.59 ms. Allocated memory was 98.6 MB in the beginning and 119.5 MB in the end (delta: 21.0 MB). Free memory was 66.0 MB in the beginning and 93.5 MB in the end (delta: -27.5 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-15 19:11:27,991 INFO L168 Benchmark]: Boogie Procedure Inliner took 35.80 ms. Allocated memory is still 119.5 MB. Free memory was 93.5 MB in the beginning and 92.3 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-15 19:11:27,991 INFO L168 Benchmark]: Boogie Preprocessor took 44.18 ms. Allocated memory is still 119.5 MB. Free memory was 92.3 MB in the beginning and 91.3 MB in the end (delta: 987.4 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-15 19:11:27,994 INFO L168 Benchmark]: RCFGBuilder took 266.08 ms. Allocated memory is still 119.5 MB. Free memory was 91.3 MB in the beginning and 81.9 MB in the end (delta: 9.4 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-15 19:11:27,995 INFO L168 Benchmark]: TraceAbstraction took 1863.58 ms. Allocated memory is still 119.5 MB. Free memory was 81.4 MB in the beginning and 61.8 MB in the end (delta: 19.6 MB). Peak memory consumption was 21.7 MB. Max. memory is 16.1 GB. [2021-10-15 19:11:27,995 INFO L168 Benchmark]: Witness Printer took 63.92 ms. Allocated memory is still 119.5 MB. Free memory was 61.8 MB in the beginning and 59.7 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-15 19:11:27,997 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 98.6 MB. Free memory is still 54.9 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 274.59 ms. Allocated memory was 98.6 MB in the beginning and 119.5 MB in the end (delta: 21.0 MB). Free memory was 66.0 MB in the beginning and 93.5 MB in the end (delta: -27.5 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 35.80 ms. Allocated memory is still 119.5 MB. Free memory was 93.5 MB in the beginning and 92.3 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 44.18 ms. Allocated memory is still 119.5 MB. Free memory was 92.3 MB in the beginning and 91.3 MB in the end (delta: 987.4 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 266.08 ms. Allocated memory is still 119.5 MB. Free memory was 91.3 MB in the beginning and 81.9 MB in the end (delta: 9.4 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 1863.58 ms. Allocated memory is still 119.5 MB. Free memory was 81.4 MB in the beginning and 61.8 MB in the end (delta: 19.6 MB). Peak memory consumption was 21.7 MB. Max. memory is 16.1 GB. * Witness Printer took 63.92 ms. Allocated memory is still 119.5 MB. Free memory was 61.8 MB in the beginning and 59.7 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: 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: 16]: 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 CFG has 1 procedures, 17 locations, 1 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 3.6ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 1777.7ms, OverallIterations: 5, TraceHistogramMax: 4, EmptinessCheckTime: 0.0ms, AutomataDifference: 413.4ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 35.9ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 21 SDtfs, 35 SDslu, 14 SDs, 0 SdLazy, 123 SolverSat, 23 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 140.4ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 51 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 70.5ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=156occurred in iteration=4, InterpolantAutomatonStates: 23, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 29.3ms SsaConstructionTime, 164.4ms SatisfiabilityAnalysisTime, 391.8ms InterpolantComputationTime, 104 NumberOfCodeBlocks, 104 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 97 ConstructedInterpolants, 0 QuantifiedInterpolants, 158 SizeOfPredicates, 0 NumberOfNonLiveVariables, 122 ConjunctsInSsa, 7 ConjunctsInUnsatCore, 7 InterpolantComputations, 3 PerfectInterpolantSequences, 37/45 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! [2021-10-15 19:11:28,037 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_174de2b6-03b4-4cef-80b4-1dfeecda5d19/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request...