./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/float-newlib/float_req_bl_1231.c --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_77de9fd7-1435-4d19-9352-673075aa775c/bin/uautomizer-hJ6jxDFKc3/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77de9fd7-1435-4d19-9352-673075aa775c/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_77de9fd7-1435-4d19-9352-673075aa775c/bin/uautomizer-hJ6jxDFKc3/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77de9fd7-1435-4d19-9352-673075aa775c/bin/uautomizer-hJ6jxDFKc3/config/AutomizerReach.xml -i ../../sv-benchmarks/c/float-newlib/float_req_bl_1231.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77de9fd7-1435-4d19-9352-673075aa775c/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_77de9fd7-1435-4d19-9352-673075aa775c/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 8039b1e35b9e459b273890fa707790cd9b2d1812 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77de9fd7-1435-4d19-9352-673075aa775c/bin/uautomizer-hJ6jxDFKc3/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77de9fd7-1435-4d19-9352-673075aa775c/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_77de9fd7-1435-4d19-9352-673075aa775c/bin/uautomizer-hJ6jxDFKc3/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77de9fd7-1435-4d19-9352-673075aa775c/bin/uautomizer-hJ6jxDFKc3/config/AutomizerReach.xml -i ../../sv-benchmarks/c/float-newlib/float_req_bl_1231.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77de9fd7-1435-4d19-9352-673075aa775c/bin/uautomizer-hJ6jxDFKc3/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77de9fd7-1435-4d19-9352-673075aa775c/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 8039b1e35b9e459b273890fa707790cd9b2d1812 ......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 20:24:54,481 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-15 20:24:54,484 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-15 20:24:54,544 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-15 20:24:54,544 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-15 20:24:54,549 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-15 20:24:54,551 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-15 20:24:54,555 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-15 20:24:54,558 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-15 20:24:54,565 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-15 20:24:54,566 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-15 20:24:54,568 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-15 20:24:54,568 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-15 20:24:54,571 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-15 20:24:54,573 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-15 20:24:54,577 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-15 20:24:54,579 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-15 20:24:54,580 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-15 20:24:54,582 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-15 20:24:54,590 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-15 20:24:54,592 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-15 20:24:54,593 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-15 20:24:54,596 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-15 20:24:54,597 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-15 20:24:54,606 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-15 20:24:54,607 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-15 20:24:54,607 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-15 20:24:54,609 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-15 20:24:54,610 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-15 20:24:54,611 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-15 20:24:54,612 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-15 20:24:54,613 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-15 20:24:54,615 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-15 20:24:54,616 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-15 20:24:54,617 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-15 20:24:54,618 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-15 20:24:54,618 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-15 20:24:54,619 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-15 20:24:54,619 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-15 20:24:54,620 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-15 20:24:54,620 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-15 20:24:54,621 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77de9fd7-1435-4d19-9352-673075aa775c/bin/uautomizer-hJ6jxDFKc3/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-15 20:24:54,665 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-15 20:24:54,666 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-15 20:24:54,666 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-15 20:24:54,666 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-15 20:24:54,675 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-15 20:24:54,675 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-15 20:24:54,675 INFO L138 SettingsManager]: * Use SBE=true [2021-10-15 20:24:54,676 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-15 20:24:54,676 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-15 20:24:54,676 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-15 20:24:54,677 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-15 20:24:54,677 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-15 20:24:54,677 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-15 20:24:54,678 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-15 20:24:54,678 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-15 20:24:54,678 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-15 20:24:54,678 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-15 20:24:54,678 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-15 20:24:54,679 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-15 20:24:54,679 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-15 20:24:54,679 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-15 20:24:54,679 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-15 20:24:54,680 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-15 20:24:54,680 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-15 20:24:54,680 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-15 20:24:54,680 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-15 20:24:54,680 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-15 20:24:54,681 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-15 20:24:54,681 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-10-15 20:24:54,682 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-10-15 20:24:54,683 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-15 20:24:54,683 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-15 20:24:54,683 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_77de9fd7-1435-4d19-9352-673075aa775c/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77de9fd7-1435-4d19-9352-673075aa775c/bin/uautomizer-hJ6jxDFKc3 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8039b1e35b9e459b273890fa707790cd9b2d1812 [2021-10-15 20:24:54,995 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-15 20:24:55,020 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-15 20:24:55,023 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-15 20:24:55,025 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-15 20:24:55,026 INFO L275 PluginConnector]: CDTParser initialized [2021-10-15 20:24:55,027 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77de9fd7-1435-4d19-9352-673075aa775c/bin/uautomizer-hJ6jxDFKc3/../../sv-benchmarks/c/float-newlib/float_req_bl_1231.c [2021-10-15 20:24:55,095 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77de9fd7-1435-4d19-9352-673075aa775c/bin/uautomizer-hJ6jxDFKc3/data/33b7b8d67/52f6fdcaac344b15a8243d08346107b9/FLAG4809f2a49 [2021-10-15 20:24:55,543 INFO L306 CDTParser]: Found 1 translation units. [2021-10-15 20:24:55,543 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77de9fd7-1435-4d19-9352-673075aa775c/sv-benchmarks/c/float-newlib/float_req_bl_1231.c [2021-10-15 20:24:55,550 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77de9fd7-1435-4d19-9352-673075aa775c/bin/uautomizer-hJ6jxDFKc3/data/33b7b8d67/52f6fdcaac344b15a8243d08346107b9/FLAG4809f2a49 [2021-10-15 20:24:55,919 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77de9fd7-1435-4d19-9352-673075aa775c/bin/uautomizer-hJ6jxDFKc3/data/33b7b8d67/52f6fdcaac344b15a8243d08346107b9 [2021-10-15 20:24:55,922 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-15 20:24:55,923 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-15 20:24:55,928 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-15 20:24:55,928 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-15 20:24:55,932 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-15 20:24:55,933 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 08:24:55" (1/1) ... [2021-10-15 20:24:55,934 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@75f58ac1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:24:55, skipping insertion in model container [2021-10-15 20:24:55,934 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 08:24:55" (1/1) ... [2021-10-15 20:24:55,953 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-15 20:24:55,970 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-15 20:24:56,175 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_77de9fd7-1435-4d19-9352-673075aa775c/sv-benchmarks/c/float-newlib/float_req_bl_1231.c[1835,1848] [2021-10-15 20:24:56,179 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_77de9fd7-1435-4d19-9352-673075aa775c/sv-benchmarks/c/float-newlib/float_req_bl_1231.c[1994,2007] [2021-10-15 20:24:56,181 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-15 20:24:56,189 INFO L203 MainTranslator]: Completed pre-run [2021-10-15 20:24:56,213 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_77de9fd7-1435-4d19-9352-673075aa775c/sv-benchmarks/c/float-newlib/float_req_bl_1231.c[1835,1848] [2021-10-15 20:24:56,215 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_77de9fd7-1435-4d19-9352-673075aa775c/sv-benchmarks/c/float-newlib/float_req_bl_1231.c[1994,2007] [2021-10-15 20:24:56,216 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-15 20:24:56,233 INFO L208 MainTranslator]: Completed translation [2021-10-15 20:24:56,234 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:24:56 WrapperNode [2021-10-15 20:24:56,234 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-15 20:24:56,236 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-15 20:24:56,236 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-15 20:24:56,236 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-15 20:24:56,243 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:24:56" (1/1) ... [2021-10-15 20:24:56,256 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:24:56" (1/1) ... [2021-10-15 20:24:56,308 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-15 20:24:56,309 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-15 20:24:56,309 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-15 20:24:56,309 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-15 20:24:56,317 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:24:56" (1/1) ... [2021-10-15 20:24:56,318 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:24:56" (1/1) ... [2021-10-15 20:24:56,336 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:24:56" (1/1) ... [2021-10-15 20:24:56,336 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:24:56" (1/1) ... [2021-10-15 20:24:56,350 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:24:56" (1/1) ... [2021-10-15 20:24:56,357 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:24:56" (1/1) ... [2021-10-15 20:24:56,373 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:24:56" (1/1) ... [2021-10-15 20:24:56,376 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-15 20:24:56,377 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-15 20:24:56,377 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-15 20:24:56,377 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-15 20:24:56,378 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:24:56" (1/1) ... [2021-10-15 20:24:56,390 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-15 20:24:56,402 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77de9fd7-1435-4d19-9352-673075aa775c/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:24:56,417 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77de9fd7-1435-4d19-9352-673075aa775c/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-15 20:24:56,440 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77de9fd7-1435-4d19-9352-673075aa775c/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-15 20:24:56,474 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-15 20:24:56,474 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-15 20:24:56,474 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2021-10-15 20:24:56,475 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-15 20:24:56,475 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-15 20:24:56,475 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-15 20:24:56,475 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-15 20:24:56,835 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-15 20:24:56,836 INFO L299 CfgBuilder]: Removed 30 assume(true) statements. [2021-10-15 20:24:56,838 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 08:24:56 BoogieIcfgContainer [2021-10-15 20:24:56,838 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-15 20:24:56,840 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-15 20:24:56,841 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-15 20:24:56,845 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-15 20:24:56,845 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 08:24:55" (1/3) ... [2021-10-15 20:24:56,846 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@797a03c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 08:24:56, skipping insertion in model container [2021-10-15 20:24:56,846 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:24:56" (2/3) ... [2021-10-15 20:24:56,847 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@797a03c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 08:24:56, skipping insertion in model container [2021-10-15 20:24:56,847 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 08:24:56" (3/3) ... [2021-10-15 20:24:56,849 INFO L111 eAbstractionObserver]: Analyzing ICFG float_req_bl_1231.c [2021-10-15 20:24:56,855 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-15 20:24:56,855 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-10-15 20:24:56,917 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-15 20:24:56,936 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 20:24:56,940 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-10-15 20:24:56,953 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 47 places, 69 transitions, 138 flow [2021-10-15 20:24:57,003 INFO L129 PetriNetUnfolder]: 23/69 cut-off events. [2021-10-15 20:24:57,004 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 20:24:57,006 INFO L84 FinitePrefix]: Finished finitePrefix Result has 70 conditions, 69 events. 23/69 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 102 event pairs, 0 based on Foata normal form. 0/44 useless extension candidates. Maximal degree in co-relation 0. Up to 5 conditions per place. [2021-10-15 20:24:57,006 INFO L82 GeneralOperation]: Start removeDead. Operand has 47 places, 69 transitions, 138 flow [2021-10-15 20:24:57,013 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 43 places, 62 transitions, 124 flow [2021-10-15 20:24:57,023 INFO L129 PetriNetUnfolder]: 18/53 cut-off events. [2021-10-15 20:24:57,023 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 20:24:57,024 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:24:57,024 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:24:57,025 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:24:57,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:24:57,031 INFO L82 PathProgramCache]: Analyzing trace with hash 1204154757, now seen corresponding path program 1 times [2021-10-15 20:24:57,040 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:24:57,041 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399488471] [2021-10-15 20:24:57,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:24:57,042 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:24:57,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:24:57,236 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 20:24:57,237 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:24:57,237 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399488471] [2021-10-15 20:24:57,238 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399488471] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:24:57,238 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:24:57,239 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-15 20:24:57,240 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575357689] [2021-10-15 20:24:57,251 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-15 20:24:57,251 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:24:57,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-15 20:24:57,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-15 20:24:57,273 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 69 [2021-10-15 20:24:57,292 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 62 transitions, 124 flow. Second operand has 4 states, 4 states have (on average 53.75) internal successors, (215), 4 states have internal predecessors, (215), 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 20:24:57,293 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:24:57,293 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 69 [2021-10-15 20:24:57,294 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:24:57,405 INFO L129 PetriNetUnfolder]: 17/66 cut-off events. [2021-10-15 20:24:57,405 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 20:24:57,415 INFO L84 FinitePrefix]: Finished finitePrefix Result has 82 conditions, 66 events. 17/66 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 107 event pairs, 0 based on Foata normal form. 4/52 useless extension candidates. Maximal degree in co-relation 43. Up to 10 conditions per place. [2021-10-15 20:24:57,417 INFO L132 encePairwiseOnDemand]: 59/69 looper letters, 8 selfloop transitions, 6 changer transitions 0/62 dead transitions. [2021-10-15 20:24:57,417 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 62 transitions, 152 flow [2021-10-15 20:24:57,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-15 20:24:57,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-10-15 20:24:57,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 279 transitions. [2021-10-15 20:24:57,433 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.808695652173913 [2021-10-15 20:24:57,434 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 279 transitions. [2021-10-15 20:24:57,435 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 279 transitions. [2021-10-15 20:24:57,437 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:24:57,440 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 279 transitions. [2021-10-15 20:24:57,445 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 55.8) internal successors, (279), 5 states have internal predecessors, (279), 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 20:24:57,452 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 69.0) internal successors, (414), 6 states have internal predecessors, (414), 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 20:24:57,453 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 69.0) internal successors, (414), 6 states have internal predecessors, (414), 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 20:24:57,455 INFO L186 Difference]: Start difference. First operand has 43 places, 62 transitions, 124 flow. Second operand 5 states and 279 transitions. [2021-10-15 20:24:57,457 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 62 transitions, 152 flow [2021-10-15 20:24:57,460 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 62 transitions, 152 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-10-15 20:24:57,464 INFO L242 Difference]: Finished difference. Result has 50 places, 62 transitions, 154 flow [2021-10-15 20:24:57,467 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=69, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=154, PETRI_PLACES=50, PETRI_TRANSITIONS=62} [2021-10-15 20:24:57,468 INFO L334 CegarLoopForPetriNet]: 43 programPoint places, 7 predicate places. [2021-10-15 20:24:57,468 INFO L470 AbstractCegarLoop]: Abstraction has has 50 places, 62 transitions, 154 flow [2021-10-15 20:24:57,468 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 53.75) internal successors, (215), 4 states have internal predecessors, (215), 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 20:24:57,469 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:24:57,469 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:24:57,469 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-15 20:24:57,470 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:24:57,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:24:57,471 INFO L82 PathProgramCache]: Analyzing trace with hash 44236684, now seen corresponding path program 1 times [2021-10-15 20:24:57,471 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:24:57,471 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918428530] [2021-10-15 20:24:57,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:24:57,473 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:24:57,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:24:57,615 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 20:24:57,615 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:24:57,615 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918428530] [2021-10-15 20:24:57,616 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918428530] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:24:57,616 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:24:57,616 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-15 20:24:57,616 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713589878] [2021-10-15 20:24:57,618 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-15 20:24:57,618 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:24:57,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-15 20:24:57,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-15 20:24:57,636 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 69 [2021-10-15 20:24:57,639 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 62 transitions, 154 flow. Second operand has 4 states, 4 states have (on average 49.0) internal successors, (196), 4 states have internal predecessors, (196), 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 20:24:57,640 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:24:57,640 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 69 [2021-10-15 20:24:57,640 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:24:57,699 INFO L129 PetriNetUnfolder]: 20/88 cut-off events. [2021-10-15 20:24:57,699 INFO L130 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2021-10-15 20:24:57,700 INFO L84 FinitePrefix]: Finished finitePrefix Result has 127 conditions, 88 events. 20/88 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 162 event pairs, 0 based on Foata normal form. 0/73 useless extension candidates. Maximal degree in co-relation 94. Up to 16 conditions per place. [2021-10-15 20:24:57,704 INFO L132 encePairwiseOnDemand]: 64/69 looper letters, 15 selfloop transitions, 4 changer transitions 0/65 dead transitions. [2021-10-15 20:24:57,705 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 65 transitions, 198 flow [2021-10-15 20:24:57,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-15 20:24:57,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-10-15 20:24:57,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 211 transitions. [2021-10-15 20:24:57,715 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7644927536231884 [2021-10-15 20:24:57,715 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 211 transitions. [2021-10-15 20:24:57,716 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 211 transitions. [2021-10-15 20:24:57,716 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:24:57,717 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 211 transitions. [2021-10-15 20:24:57,722 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 52.75) internal successors, (211), 4 states have internal predecessors, (211), 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 20:24:57,724 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 69.0) internal successors, (345), 5 states have internal predecessors, (345), 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 20:24:57,727 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 69.0) internal successors, (345), 5 states have internal predecessors, (345), 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 20:24:57,727 INFO L186 Difference]: Start difference. First operand has 50 places, 62 transitions, 154 flow. Second operand 4 states and 211 transitions. [2021-10-15 20:24:57,728 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 65 transitions, 198 flow [2021-10-15 20:24:57,730 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 65 transitions, 198 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-10-15 20:24:57,734 INFO L242 Difference]: Finished difference. Result has 55 places, 64 transitions, 177 flow [2021-10-15 20:24:57,738 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=69, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=177, PETRI_PLACES=55, PETRI_TRANSITIONS=64} [2021-10-15 20:24:57,739 INFO L334 CegarLoopForPetriNet]: 43 programPoint places, 12 predicate places. [2021-10-15 20:24:57,739 INFO L470 AbstractCegarLoop]: Abstraction has has 55 places, 64 transitions, 177 flow [2021-10-15 20:24:57,740 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 49.0) internal successors, (196), 4 states have internal predecessors, (196), 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 20:24:57,740 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:24:57,740 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:24:57,740 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-15 20:24:57,741 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:24:57,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:24:57,749 INFO L82 PathProgramCache]: Analyzing trace with hash -674173253, now seen corresponding path program 1 times [2021-10-15 20:24:57,750 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:24:57,750 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315544616] [2021-10-15 20:24:57,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:24:57,751 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:24:57,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:24:57,854 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 20:24:57,854 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:24:57,855 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315544616] [2021-10-15 20:24:57,855 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [315544616] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:24:57,855 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:24:57,855 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-15 20:24:57,856 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324782192] [2021-10-15 20:24:57,856 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-15 20:24:57,856 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:24:57,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-15 20:24:57,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-15 20:24:57,859 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 69 [2021-10-15 20:24:57,860 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 64 transitions, 177 flow. Second operand has 4 states, 4 states have (on average 49.0) internal successors, (196), 4 states have internal predecessors, (196), 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 20:24:57,860 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:24:57,860 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 69 [2021-10-15 20:24:57,860 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:24:57,956 INFO L129 PetriNetUnfolder]: 23/110 cut-off events. [2021-10-15 20:24:57,956 INFO L130 PetriNetUnfolder]: For 11/11 co-relation queries the response was YES. [2021-10-15 20:24:57,957 INFO L84 FinitePrefix]: Finished finitePrefix Result has 166 conditions, 110 events. 23/110 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 273 event pairs, 0 based on Foata normal form. 0/90 useless extension candidates. Maximal degree in co-relation 130. Up to 19 conditions per place. [2021-10-15 20:24:57,958 INFO L132 encePairwiseOnDemand]: 64/69 looper letters, 17 selfloop transitions, 4 changer transitions 0/67 dead transitions. [2021-10-15 20:24:57,958 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 67 transitions, 229 flow [2021-10-15 20:24:57,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-15 20:24:57,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-10-15 20:24:57,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 211 transitions. [2021-10-15 20:24:57,967 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7644927536231884 [2021-10-15 20:24:57,968 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 211 transitions. [2021-10-15 20:24:57,968 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 211 transitions. [2021-10-15 20:24:57,968 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:24:57,969 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 211 transitions. [2021-10-15 20:24:57,970 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 52.75) internal successors, (211), 4 states have internal predecessors, (211), 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 20:24:57,973 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 69.0) internal successors, (345), 5 states have internal predecessors, (345), 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 20:24:57,974 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 69.0) internal successors, (345), 5 states have internal predecessors, (345), 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 20:24:57,974 INFO L186 Difference]: Start difference. First operand has 55 places, 64 transitions, 177 flow. Second operand 4 states and 211 transitions. [2021-10-15 20:24:57,974 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 67 transitions, 229 flow [2021-10-15 20:24:57,978 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 67 transitions, 226 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-10-15 20:24:57,982 INFO L242 Difference]: Finished difference. Result has 59 places, 66 transitions, 201 flow [2021-10-15 20:24:57,983 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=69, PETRI_DIFFERENCE_MINUEND_FLOW=174, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=201, PETRI_PLACES=59, PETRI_TRANSITIONS=66} [2021-10-15 20:24:57,983 INFO L334 CegarLoopForPetriNet]: 43 programPoint places, 16 predicate places. [2021-10-15 20:24:57,983 INFO L470 AbstractCegarLoop]: Abstraction has has 59 places, 66 transitions, 201 flow [2021-10-15 20:24:57,984 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 49.0) internal successors, (196), 4 states have internal predecessors, (196), 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 20:24:57,984 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:24:57,984 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:24:57,985 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-15 20:24:57,986 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:24:57,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:24:57,987 INFO L82 PathProgramCache]: Analyzing trace with hash -1345927737, now seen corresponding path program 1 times [2021-10-15 20:24:57,987 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:24:57,988 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042828861] [2021-10-15 20:24:57,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:24:57,988 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:24:58,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:24:58,073 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 20:24:58,073 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:24:58,073 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042828861] [2021-10-15 20:24:58,074 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2042828861] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:24:58,074 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:24:58,074 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-15 20:24:58,074 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210772746] [2021-10-15 20:24:58,075 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-15 20:24:58,075 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:24:58,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-15 20:24:58,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-15 20:24:58,078 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 69 [2021-10-15 20:24:58,078 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 66 transitions, 201 flow. Second operand has 4 states, 4 states have (on average 49.0) internal successors, (196), 4 states have internal predecessors, (196), 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 20:24:58,079 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:24:58,079 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 69 [2021-10-15 20:24:58,079 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:24:58,152 INFO L129 PetriNetUnfolder]: 26/132 cut-off events. [2021-10-15 20:24:58,152 INFO L130 PetriNetUnfolder]: For 18/18 co-relation queries the response was YES. [2021-10-15 20:24:58,153 INFO L84 FinitePrefix]: Finished finitePrefix Result has 205 conditions, 132 events. 26/132 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 385 event pairs, 0 based on Foata normal form. 0/107 useless extension candidates. Maximal degree in co-relation 167. Up to 18 conditions per place. [2021-10-15 20:24:58,154 INFO L132 encePairwiseOnDemand]: 62/69 looper letters, 15 selfloop transitions, 8 changer transitions 0/69 dead transitions. [2021-10-15 20:24:58,155 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 69 transitions, 261 flow [2021-10-15 20:24:58,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-15 20:24:58,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-10-15 20:24:58,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 211 transitions. [2021-10-15 20:24:58,157 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7644927536231884 [2021-10-15 20:24:58,157 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 211 transitions. [2021-10-15 20:24:58,157 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 211 transitions. [2021-10-15 20:24:58,158 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:24:58,158 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 211 transitions. [2021-10-15 20:24:58,159 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 52.75) internal successors, (211), 4 states have internal predecessors, (211), 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 20:24:58,161 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 69.0) internal successors, (345), 5 states have internal predecessors, (345), 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 20:24:58,161 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 69.0) internal successors, (345), 5 states have internal predecessors, (345), 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 20:24:58,162 INFO L186 Difference]: Start difference. First operand has 59 places, 66 transitions, 201 flow. Second operand 4 states and 211 transitions. [2021-10-15 20:24:58,162 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 69 transitions, 261 flow [2021-10-15 20:24:58,165 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 69 transitions, 254 flow, removed 2 selfloop flow, removed 1 redundant places. [2021-10-15 20:24:58,167 INFO L242 Difference]: Finished difference. Result has 63 places, 68 transitions, 238 flow [2021-10-15 20:24:58,168 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=69, PETRI_DIFFERENCE_MINUEND_FLOW=194, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=238, PETRI_PLACES=63, PETRI_TRANSITIONS=68} [2021-10-15 20:24:58,168 INFO L334 CegarLoopForPetriNet]: 43 programPoint places, 20 predicate places. [2021-10-15 20:24:58,168 INFO L470 AbstractCegarLoop]: Abstraction has has 63 places, 68 transitions, 238 flow [2021-10-15 20:24:58,169 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 49.0) internal successors, (196), 4 states have internal predecessors, (196), 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 20:24:58,169 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:24:58,169 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:24:58,169 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-15 20:24:58,170 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:24:58,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:24:58,170 INFO L82 PathProgramCache]: Analyzing trace with hash -1380709804, now seen corresponding path program 1 times [2021-10-15 20:24:58,171 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:24:58,171 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525954348] [2021-10-15 20:24:58,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:24:58,172 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:24:58,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:24:58,241 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 20:24:58,241 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:24:58,241 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525954348] [2021-10-15 20:24:58,241 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525954348] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:24:58,242 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:24:58,242 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 20:24:58,242 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142838142] [2021-10-15 20:24:58,243 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 20:24:58,243 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:24:58,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 20:24:58,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 20:24:58,245 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 69 [2021-10-15 20:24:58,246 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 68 transitions, 238 flow. Second operand has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 3 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:24:58,246 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:24:58,246 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 69 [2021-10-15 20:24:58,246 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:24:58,300 INFO L129 PetriNetUnfolder]: 26/136 cut-off events. [2021-10-15 20:24:58,300 INFO L130 PetriNetUnfolder]: For 22/22 co-relation queries the response was YES. [2021-10-15 20:24:58,302 INFO L84 FinitePrefix]: Finished finitePrefix Result has 227 conditions, 136 events. 26/136 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 417 event pairs, 0 based on Foata normal form. 0/111 useless extension candidates. Maximal degree in co-relation 188. Up to 26 conditions per place. [2021-10-15 20:24:58,304 INFO L132 encePairwiseOnDemand]: 66/69 looper letters, 6 selfloop transitions, 2 changer transitions 0/69 dead transitions. [2021-10-15 20:24:58,304 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 69 transitions, 256 flow [2021-10-15 20:24:58,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 20:24:58,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 20:24:58,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 177 transitions. [2021-10-15 20:24:58,307 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.855072463768116 [2021-10-15 20:24:58,308 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 177 transitions. [2021-10-15 20:24:58,308 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 177 transitions. [2021-10-15 20:24:58,308 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:24:58,308 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 177 transitions. [2021-10-15 20:24:58,309 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 59.0) internal successors, (177), 3 states have internal predecessors, (177), 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 20:24:58,310 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 69.0) internal successors, (276), 4 states have internal predecessors, (276), 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 20:24:58,312 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 69.0) internal successors, (276), 4 states have internal predecessors, (276), 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 20:24:58,312 INFO L186 Difference]: Start difference. First operand has 63 places, 68 transitions, 238 flow. Second operand 3 states and 177 transitions. [2021-10-15 20:24:58,312 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 69 transitions, 256 flow [2021-10-15 20:24:58,320 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 69 transitions, 240 flow, removed 5 selfloop flow, removed 1 redundant places. [2021-10-15 20:24:58,322 INFO L242 Difference]: Finished difference. Result has 65 places, 69 transitions, 234 flow [2021-10-15 20:24:58,323 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=69, PETRI_DIFFERENCE_MINUEND_FLOW=222, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=234, PETRI_PLACES=65, PETRI_TRANSITIONS=69} [2021-10-15 20:24:58,323 INFO L334 CegarLoopForPetriNet]: 43 programPoint places, 22 predicate places. [2021-10-15 20:24:58,324 INFO L470 AbstractCegarLoop]: Abstraction has has 65 places, 69 transitions, 234 flow [2021-10-15 20:24:58,324 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 3 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:24:58,324 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:24:58,324 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:24:58,324 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-15 20:24:58,325 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:24:58,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:24:58,325 INFO L82 PathProgramCache]: Analyzing trace with hash 147544209, now seen corresponding path program 1 times [2021-10-15 20:24:58,326 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:24:58,326 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357926885] [2021-10-15 20:24:58,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:24:58,327 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:24:58,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-15 20:24:58,402 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-15 20:24:58,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-15 20:24:58,502 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-15 20:24:58,503 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-10-15 20:24:58,504 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-15 20:24:58,506 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION [2021-10-15 20:24:58,506 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-10-15 20:24:58,517 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-15 20:24:58,567 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.10 08:24:58 BoogieIcfgContainer [2021-10-15 20:24:58,567 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-15 20:24:58,568 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-15 20:24:58,574 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-15 20:24:58,574 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-15 20:24:58,575 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 08:24:56" (3/4) ... [2021-10-15 20:24:58,578 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-10-15 20:24:58,578 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-15 20:24:58,582 INFO L168 Benchmark]: Toolchain (without parser) took 2655.63 ms. Allocated memory was 111.1 MB in the beginning and 146.8 MB in the end (delta: 35.7 MB). Free memory was 69.6 MB in the beginning and 76.9 MB in the end (delta: -7.4 MB). Peak memory consumption was 27.1 MB. Max. memory is 16.1 GB. [2021-10-15 20:24:58,583 INFO L168 Benchmark]: CDTParser took 0.29 ms. Allocated memory is still 111.1 MB. Free memory was 85.8 MB in the beginning and 85.7 MB in the end (delta: 53.1 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-15 20:24:58,584 INFO L168 Benchmark]: CACSL2BoogieTranslator took 306.61 ms. Allocated memory is still 111.1 MB. Free memory was 69.4 MB in the beginning and 84.3 MB in the end (delta: -14.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-15 20:24:58,584 INFO L168 Benchmark]: Boogie Procedure Inliner took 72.27 ms. Allocated memory is still 111.1 MB. Free memory was 84.3 MB in the beginning and 82.3 MB in the end (delta: 2.0 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-15 20:24:58,585 INFO L168 Benchmark]: Boogie Preprocessor took 67.59 ms. Allocated memory is still 111.1 MB. Free memory was 82.3 MB in the beginning and 80.8 MB in the end (delta: 1.5 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-15 20:24:58,586 INFO L168 Benchmark]: RCFGBuilder took 461.71 ms. Allocated memory is still 111.1 MB. Free memory was 80.5 MB in the beginning and 65.8 MB in the end (delta: 14.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-10-15 20:24:58,587 INFO L168 Benchmark]: TraceAbstraction took 1726.76 ms. Allocated memory was 111.1 MB in the beginning and 146.8 MB in the end (delta: 35.7 MB). Free memory was 65.5 MB in the beginning and 76.9 MB in the end (delta: -11.4 MB). Peak memory consumption was 25.2 MB. Max. memory is 16.1 GB. [2021-10-15 20:24:58,587 INFO L168 Benchmark]: Witness Printer took 10.26 ms. Allocated memory is still 146.8 MB. Free memory is still 76.9 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-15 20:24:58,591 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29 ms. Allocated memory is still 111.1 MB. Free memory was 85.8 MB in the beginning and 85.7 MB in the end (delta: 53.1 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 306.61 ms. Allocated memory is still 111.1 MB. Free memory was 69.4 MB in the beginning and 84.3 MB in the end (delta: -14.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 72.27 ms. Allocated memory is still 111.1 MB. Free memory was 84.3 MB in the beginning and 82.3 MB in the end (delta: 2.0 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 67.59 ms. Allocated memory is still 111.1 MB. Free memory was 82.3 MB in the beginning and 80.8 MB in the end (delta: 1.5 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * RCFGBuilder took 461.71 ms. Allocated memory is still 111.1 MB. Free memory was 80.5 MB in the beginning and 65.8 MB in the end (delta: 14.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 1726.76 ms. Allocated memory was 111.1 MB in the beginning and 146.8 MB in the end (delta: 35.7 MB). Free memory was 65.5 MB in the beginning and 76.9 MB in the end (delta: -11.4 MB). Peak memory consumption was 25.2 MB. Max. memory is 16.1 GB. * Witness Printer took 10.26 ms. Allocated memory is still 146.8 MB. Free memory is still 76.9 MB. There was no memory consumed. 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 - UnprovableResult [Line: 77]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 76. Possible FailurePath: [L68] float x = __VERIFIER_nondet_float(); [L69] float y = __VERIFIER_nondet_float(); [L59] return x != x; [L70] EXPR isnan_float(x) && !isnan_float(y) [L59] return x != x; [L70] EXPR isnan_float(x) && !isnan_float(y) [L70-L71] (isnan_float(x) && !isnan_float(y)) || (!isnan_float(x) && isnan_float(y)) [L70-L71] COND TRUE (isnan_float(x) && !isnan_float(y)) || (!isnan_float(x) && isnan_float(y)) [L15] __uint32_t w; [L18] ieee_float_shape_type gf_u; [L19] gf_u.value = (x) [L20] EXPR gf_u.word [L20] (w) = gf_u.word [L23] COND FALSE !(w == 0x00000000 || w == 0x80000000) [L25-L26] COND FALSE !((w >= 0x00800000 && w <= 0x7f7fffff) || (w >= 0x80800000 && w <= 0xff7fffff)) [L28-L29] COND FALSE !((w >= 0x00000001 && w <= 0x007fffff) || (w >= 0x80000001 && w <= 0x807fffff)) [L31] COND FALSE !(w == 0x7f800000 || w == 0xff800000) [L34] return 0; [L38] COND TRUE __fpclassify_float(x) == 0 [L39] return y; [L73] float res = fmin_float(x, y); [L59] return x != x; [L76] EXPR isnan_float(x) && !isnan_float(y) [L59] return x != x; [L76] EXPR isnan_float(x) && !isnan_float(y) [L76] COND TRUE isnan_float(x) && !isnan_float(y) && res != y [L77] reach_error() - UnprovableResult [Line: 83]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 47 locations, 2 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 10.3ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 1598.3ms, OverallIterations: 6, TraceHistogramMax: 1, EmptinessCheckTime: 0.0ms, AutomataDifference: 608.3ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 72.6ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 57 SDtfs, 10 SDslu, 42 SDs, 0 SdLazy, 84 SolverSat, 6 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 143.1ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 23 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 82.0ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=238occurred in iteration=4, InterpolantAutomatonStates: 20, 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: 43.9ms SsaConstructionTime, 209.9ms SatisfiabilityAnalysisTime, 331.1ms InterpolantComputationTime, 116 NumberOfCodeBlocks, 116 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 89 ConstructedInterpolants, 0 QuantifiedInterpolants, 104 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 5 InterpolantComputations, 5 PerfectInterpolantSequences, 0/0 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 RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2021-10-15 20:24:58,660 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77de9fd7-1435-4d19-9352-673075aa775c/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.1-dev-5709675 [2021-10-15 20:25:01,247 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-15 20:25:01,249 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-15 20:25:01,302 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-15 20:25:01,302 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-15 20:25:01,306 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-15 20:25:01,308 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-15 20:25:01,319 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-15 20:25:01,322 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-15 20:25:01,328 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-15 20:25:01,329 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-15 20:25:01,331 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-15 20:25:01,332 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-15 20:25:01,334 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-15 20:25:01,336 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-15 20:25:01,341 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-15 20:25:01,342 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-15 20:25:01,344 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-15 20:25:01,346 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-15 20:25:01,354 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-15 20:25:01,356 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-15 20:25:01,357 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-15 20:25:01,360 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-15 20:25:01,362 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-15 20:25:01,371 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-15 20:25:01,372 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-15 20:25:01,372 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-15 20:25:01,374 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-15 20:25:01,375 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-15 20:25:01,376 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-15 20:25:01,376 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-15 20:25:01,377 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-15 20:25:01,379 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-15 20:25:01,380 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-15 20:25:01,382 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-15 20:25:01,382 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-15 20:25:01,383 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-15 20:25:01,383 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-15 20:25:01,383 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-15 20:25:01,385 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-15 20:25:01,386 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-15 20:25:01,388 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77de9fd7-1435-4d19-9352-673075aa775c/bin/uautomizer-hJ6jxDFKc3/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2021-10-15 20:25:01,435 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-15 20:25:01,435 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-15 20:25:01,436 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-15 20:25:01,436 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-15 20:25:01,438 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-15 20:25:01,438 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-15 20:25:01,438 INFO L138 SettingsManager]: * Use SBE=true [2021-10-15 20:25:01,439 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-15 20:25:01,439 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-15 20:25:01,439 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-15 20:25:01,440 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-15 20:25:01,440 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-15 20:25:01,441 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-15 20:25:01,441 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-15 20:25:01,441 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-15 20:25:01,441 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-15 20:25:01,442 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-15 20:25:01,442 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-15 20:25:01,442 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-15 20:25:01,442 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-15 20:25:01,442 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-15 20:25:01,443 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-15 20:25:01,443 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-15 20:25:01,443 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-15 20:25:01,443 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-15 20:25:01,443 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-15 20:25:01,444 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-15 20:25:01,444 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-10-15 20:25:01,444 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-15 20:25:01,444 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-10-15 20:25:01,445 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-10-15 20:25:01,445 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-15 20:25:01,445 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-15 20:25:01,445 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-15 20:25:01,446 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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_77de9fd7-1435-4d19-9352-673075aa775c/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77de9fd7-1435-4d19-9352-673075aa775c/bin/uautomizer-hJ6jxDFKc3 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8039b1e35b9e459b273890fa707790cd9b2d1812 [2021-10-15 20:25:01,920 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-15 20:25:01,955 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-15 20:25:01,958 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-15 20:25:01,959 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-15 20:25:01,960 INFO L275 PluginConnector]: CDTParser initialized [2021-10-15 20:25:01,961 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77de9fd7-1435-4d19-9352-673075aa775c/bin/uautomizer-hJ6jxDFKc3/../../sv-benchmarks/c/float-newlib/float_req_bl_1231.c [2021-10-15 20:25:02,053 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77de9fd7-1435-4d19-9352-673075aa775c/bin/uautomizer-hJ6jxDFKc3/data/fcfe8ffbc/42f7a1dc48934793a2a8191a5f835c32/FLAG382d8ae98 [2021-10-15 20:25:02,548 INFO L306 CDTParser]: Found 1 translation units. [2021-10-15 20:25:02,551 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77de9fd7-1435-4d19-9352-673075aa775c/sv-benchmarks/c/float-newlib/float_req_bl_1231.c [2021-10-15 20:25:02,569 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77de9fd7-1435-4d19-9352-673075aa775c/bin/uautomizer-hJ6jxDFKc3/data/fcfe8ffbc/42f7a1dc48934793a2a8191a5f835c32/FLAG382d8ae98 [2021-10-15 20:25:02,947 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77de9fd7-1435-4d19-9352-673075aa775c/bin/uautomizer-hJ6jxDFKc3/data/fcfe8ffbc/42f7a1dc48934793a2a8191a5f835c32 [2021-10-15 20:25:02,953 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-15 20:25:02,955 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-15 20:25:02,959 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-15 20:25:02,960 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-15 20:25:02,964 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-15 20:25:02,965 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 08:25:02" (1/1) ... [2021-10-15 20:25:02,967 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6b840d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:25:02, skipping insertion in model container [2021-10-15 20:25:02,968 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 08:25:02" (1/1) ... [2021-10-15 20:25:02,976 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-15 20:25:03,000 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-15 20:25:03,244 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_77de9fd7-1435-4d19-9352-673075aa775c/sv-benchmarks/c/float-newlib/float_req_bl_1231.c[1835,1848] [2021-10-15 20:25:03,253 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_77de9fd7-1435-4d19-9352-673075aa775c/sv-benchmarks/c/float-newlib/float_req_bl_1231.c[1994,2007] [2021-10-15 20:25:03,255 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-15 20:25:03,275 INFO L203 MainTranslator]: Completed pre-run [2021-10-15 20:25:03,330 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_77de9fd7-1435-4d19-9352-673075aa775c/sv-benchmarks/c/float-newlib/float_req_bl_1231.c[1835,1848] [2021-10-15 20:25:03,331 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_77de9fd7-1435-4d19-9352-673075aa775c/sv-benchmarks/c/float-newlib/float_req_bl_1231.c[1994,2007] [2021-10-15 20:25:03,332 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-15 20:25:03,351 INFO L208 MainTranslator]: Completed translation [2021-10-15 20:25:03,351 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:25:03 WrapperNode [2021-10-15 20:25:03,352 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-15 20:25:03,353 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-15 20:25:03,353 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-15 20:25:03,353 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-15 20:25:03,362 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:25:03" (1/1) ... [2021-10-15 20:25:03,374 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:25:03" (1/1) ... [2021-10-15 20:25:03,406 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-15 20:25:03,407 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-15 20:25:03,407 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-15 20:25:03,407 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-15 20:25:03,416 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:25:03" (1/1) ... [2021-10-15 20:25:03,416 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:25:03" (1/1) ... [2021-10-15 20:25:03,422 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:25:03" (1/1) ... [2021-10-15 20:25:03,422 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:25:03" (1/1) ... [2021-10-15 20:25:03,435 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:25:03" (1/1) ... [2021-10-15 20:25:03,456 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:25:03" (1/1) ... [2021-10-15 20:25:03,459 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:25:03" (1/1) ... [2021-10-15 20:25:03,464 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-15 20:25:03,465 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-15 20:25:03,465 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-15 20:25:03,465 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-15 20:25:03,466 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:25:03" (1/1) ... [2021-10-15 20:25:03,490 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-15 20:25:03,503 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77de9fd7-1435-4d19-9352-673075aa775c/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:25:03,517 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77de9fd7-1435-4d19-9352-673075aa775c/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-15 20:25:03,540 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77de9fd7-1435-4d19-9352-673075aa775c/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-15 20:25:03,578 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-15 20:25:03,579 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-15 20:25:03,579 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-10-15 20:25:03,579 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-15 20:25:03,581 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-15 20:25:03,581 INFO L130 BoogieDeclarations]: Found specification of procedure write~intFLOATTYPE4 [2021-10-15 20:25:03,582 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-15 20:25:04,028 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-15 20:25:04,028 INFO L299 CfgBuilder]: Removed 30 assume(true) statements. [2021-10-15 20:25:04,030 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 08:25:04 BoogieIcfgContainer [2021-10-15 20:25:04,031 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-15 20:25:04,033 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-15 20:25:04,033 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-15 20:25:04,036 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-15 20:25:04,037 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 08:25:02" (1/3) ... [2021-10-15 20:25:04,038 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b10e5c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 08:25:04, skipping insertion in model container [2021-10-15 20:25:04,038 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:25:03" (2/3) ... [2021-10-15 20:25:04,038 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b10e5c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 08:25:04, skipping insertion in model container [2021-10-15 20:25:04,038 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 08:25:04" (3/3) ... [2021-10-15 20:25:04,040 INFO L111 eAbstractionObserver]: Analyzing ICFG float_req_bl_1231.c [2021-10-15 20:25:04,046 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-15 20:25:04,046 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-10-15 20:25:04,118 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-15 20:25:04,125 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 20:25:04,126 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-10-15 20:25:04,139 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 47 places, 69 transitions, 138 flow [2021-10-15 20:25:04,196 INFO L129 PetriNetUnfolder]: 23/69 cut-off events. [2021-10-15 20:25:04,196 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 20:25:04,198 INFO L84 FinitePrefix]: Finished finitePrefix Result has 70 conditions, 69 events. 23/69 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 102 event pairs, 0 based on Foata normal form. 0/44 useless extension candidates. Maximal degree in co-relation 0. Up to 5 conditions per place. [2021-10-15 20:25:04,198 INFO L82 GeneralOperation]: Start removeDead. Operand has 47 places, 69 transitions, 138 flow [2021-10-15 20:25:04,222 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 43 places, 62 transitions, 124 flow [2021-10-15 20:25:04,252 INFO L129 PetriNetUnfolder]: 18/53 cut-off events. [2021-10-15 20:25:04,267 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 20:25:04,268 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:25:04,268 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:25:04,268 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:25:04,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:25:04,274 INFO L82 PathProgramCache]: Analyzing trace with hash 1204154757, now seen corresponding path program 1 times [2021-10-15 20:25:04,286 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-15 20:25:04,287 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [485802304] [2021-10-15 20:25:04,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:25:04,288 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-15 20:25:04,289 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77de9fd7-1435-4d19-9352-673075aa775c/bin/uautomizer-hJ6jxDFKc3/mathsat [2021-10-15 20:25:04,292 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77de9fd7-1435-4d19-9352-673075aa775c/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-15 20:25:04,299 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77de9fd7-1435-4d19-9352-673075aa775c/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-15 20:25:04,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:25:04,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 1 conjunts are in the unsatisfiable core [2021-10-15 20:25:04,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:25:04,560 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 20:25:04,560 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-15 20:25:04,619 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 20:25:04,620 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-15 20:25:04,620 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [485802304] [2021-10-15 20:25:04,621 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [485802304] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-15 20:25:04,621 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:25:04,622 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-10-15 20:25:04,624 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901645792] [2021-10-15 20:25:04,633 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-15 20:25:04,634 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-15 20:25:04,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-15 20:25:04,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-15 20:25:04,653 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 69 [2021-10-15 20:25:04,661 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 62 transitions, 124 flow. Second operand has 2 states, 2 states have (on average 63.5) internal successors, (127), 2 states have internal predecessors, (127), 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 20:25:04,661 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:25:04,661 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 69 [2021-10-15 20:25:04,662 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:25:04,697 INFO L129 PetriNetUnfolder]: 16/58 cut-off events. [2021-10-15 20:25:04,697 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 20:25:04,698 INFO L84 FinitePrefix]: Finished finitePrefix Result has 60 conditions, 58 events. 16/58 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 81 event pairs, 0 based on Foata normal form. 4/45 useless extension candidates. Maximal degree in co-relation 58. Up to 5 conditions per place. [2021-10-15 20:25:04,700 INFO L132 encePairwiseOnDemand]: 65/69 looper letters, 0 selfloop transitions, 0 changer transitions 0/58 dead transitions. [2021-10-15 20:25:04,700 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 58 transitions, 116 flow [2021-10-15 20:25:04,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-15 20:25:04,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2021-10-15 20:25:04,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 130 transitions. [2021-10-15 20:25:04,719 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9420289855072463 [2021-10-15 20:25:04,720 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 130 transitions. [2021-10-15 20:25:04,720 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 130 transitions. [2021-10-15 20:25:04,723 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:25:04,725 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 130 transitions. [2021-10-15 20:25:04,735 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 65.0) internal successors, (130), 2 states have internal predecessors, (130), 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 20:25:04,741 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 69.0) internal successors, (207), 3 states have internal predecessors, (207), 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 20:25:04,741 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 69.0) internal successors, (207), 3 states have internal predecessors, (207), 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 20:25:04,744 INFO L186 Difference]: Start difference. First operand has 43 places, 62 transitions, 124 flow. Second operand 2 states and 130 transitions. [2021-10-15 20:25:04,745 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 58 transitions, 116 flow [2021-10-15 20:25:04,748 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 58 transitions, 116 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-10-15 20:25:04,757 INFO L242 Difference]: Finished difference. Result has 44 places, 58 transitions, 116 flow [2021-10-15 20:25:04,760 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=69, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=116, PETRI_PLACES=44, PETRI_TRANSITIONS=58} [2021-10-15 20:25:04,761 INFO L334 CegarLoopForPetriNet]: 43 programPoint places, 1 predicate places. [2021-10-15 20:25:04,761 INFO L470 AbstractCegarLoop]: Abstraction has has 44 places, 58 transitions, 116 flow [2021-10-15 20:25:04,762 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 63.5) internal successors, (127), 2 states have internal predecessors, (127), 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 20:25:04,763 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:25:04,763 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:25:04,784 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77de9fd7-1435-4d19-9352-673075aa775c/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-10-15 20:25:04,984 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77de9fd7-1435-4d19-9352-673075aa775c/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 [2021-10-15 20:25:04,985 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:25:04,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:25:04,985 INFO L82 PathProgramCache]: Analyzing trace with hash 1262247077, now seen corresponding path program 1 times [2021-10-15 20:25:04,986 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-15 20:25:04,987 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [560129859] [2021-10-15 20:25:04,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:25:04,987 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-15 20:25:04,987 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77de9fd7-1435-4d19-9352-673075aa775c/bin/uautomizer-hJ6jxDFKc3/mathsat [2021-10-15 20:25:04,988 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77de9fd7-1435-4d19-9352-673075aa775c/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-15 20:25:04,992 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77de9fd7-1435-4d19-9352-673075aa775c/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-15 20:25:05,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:25:05,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-15 20:25:05,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:25:05,226 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 20:25:05,226 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-15 20:25:05,299 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 20:25:05,299 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-15 20:25:05,300 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [560129859] [2021-10-15 20:25:05,300 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [560129859] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-15 20:25:05,301 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:25:05,309 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-10-15 20:25:05,310 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647229545] [2021-10-15 20:25:05,311 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-15 20:25:05,312 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-15 20:25:05,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-15 20:25:05,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-15 20:25:05,316 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 69 [2021-10-15 20:25:05,316 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 58 transitions, 116 flow. Second operand has 4 states, 4 states have (on average 53.5) internal successors, (214), 4 states have internal predecessors, (214), 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 20:25:05,317 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:25:05,317 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 69 [2021-10-15 20:25:05,317 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:25:05,399 INFO L129 PetriNetUnfolder]: 17/66 cut-off events. [2021-10-15 20:25:05,399 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 20:25:05,400 INFO L84 FinitePrefix]: Finished finitePrefix Result has 83 conditions, 66 events. 17/66 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 107 event pairs, 0 based on Foata normal form. 0/48 useless extension candidates. Maximal degree in co-relation 80. Up to 10 conditions per place. [2021-10-15 20:25:05,402 INFO L132 encePairwiseOnDemand]: 63/69 looper letters, 8 selfloop transitions, 6 changer transitions 0/62 dead transitions. [2021-10-15 20:25:05,402 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 62 transitions, 152 flow [2021-10-15 20:25:05,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-15 20:25:05,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-10-15 20:25:05,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 275 transitions. [2021-10-15 20:25:05,407 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7971014492753623 [2021-10-15 20:25:05,407 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 275 transitions. [2021-10-15 20:25:05,408 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 275 transitions. [2021-10-15 20:25:05,408 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:25:05,408 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 275 transitions. [2021-10-15 20:25:05,410 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 55.0) internal successors, (275), 5 states have internal predecessors, (275), 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 20:25:05,414 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 69.0) internal successors, (414), 6 states have internal predecessors, (414), 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 20:25:05,415 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 69.0) internal successors, (414), 6 states have internal predecessors, (414), 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 20:25:05,415 INFO L186 Difference]: Start difference. First operand has 44 places, 58 transitions, 116 flow. Second operand 5 states and 275 transitions. [2021-10-15 20:25:05,415 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 62 transitions, 152 flow [2021-10-15 20:25:05,416 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 62 transitions, 152 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-10-15 20:25:05,419 INFO L242 Difference]: Finished difference. Result has 51 places, 62 transitions, 154 flow [2021-10-15 20:25:05,420 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=69, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=154, PETRI_PLACES=51, PETRI_TRANSITIONS=62} [2021-10-15 20:25:05,420 INFO L334 CegarLoopForPetriNet]: 43 programPoint places, 8 predicate places. [2021-10-15 20:25:05,420 INFO L470 AbstractCegarLoop]: Abstraction has has 51 places, 62 transitions, 154 flow [2021-10-15 20:25:05,421 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 53.5) internal successors, (214), 4 states have internal predecessors, (214), 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 20:25:05,421 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:25:05,421 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:25:05,437 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77de9fd7-1435-4d19-9352-673075aa775c/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-10-15 20:25:05,633 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77de9fd7-1435-4d19-9352-673075aa775c/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 [2021-10-15 20:25:05,634 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:25:05,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:25:05,635 INFO L82 PathProgramCache]: Analyzing trace with hash 44236684, now seen corresponding path program 1 times [2021-10-15 20:25:05,635 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-15 20:25:05,635 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [329639558] [2021-10-15 20:25:05,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:25:05,636 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-15 20:25:05,636 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77de9fd7-1435-4d19-9352-673075aa775c/bin/uautomizer-hJ6jxDFKc3/mathsat [2021-10-15 20:25:05,637 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77de9fd7-1435-4d19-9352-673075aa775c/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-15 20:25:05,640 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77de9fd7-1435-4d19-9352-673075aa775c/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-10-15 20:25:05,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:25:05,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-15 20:25:05,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:25:05,826 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 20:25:05,826 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-15 20:25:05,905 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 20:25:05,906 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-15 20:25:05,906 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [329639558] [2021-10-15 20:25:05,906 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [329639558] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-15 20:25:05,906 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:25:05,906 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-10-15 20:25:05,907 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523812182] [2021-10-15 20:25:05,907 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-15 20:25:05,908 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-15 20:25:05,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-15 20:25:05,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-15 20:25:05,910 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 69 [2021-10-15 20:25:05,911 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 62 transitions, 154 flow. Second operand has 6 states, 6 states have (on average 49.166666666666664) internal successors, (295), 6 states have internal predecessors, (295), 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 20:25:05,911 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:25:05,912 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 69 [2021-10-15 20:25:05,912 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:25:06,010 INFO L129 PetriNetUnfolder]: 23/110 cut-off events. [2021-10-15 20:25:06,010 INFO L130 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2021-10-15 20:25:06,011 INFO L84 FinitePrefix]: Finished finitePrefix Result has 153 conditions, 110 events. 23/110 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 267 event pairs, 0 based on Foata normal form. 0/90 useless extension candidates. Maximal degree in co-relation 147. Up to 11 conditions per place. [2021-10-15 20:25:06,012 INFO L132 encePairwiseOnDemand]: 58/69 looper letters, 10 selfloop transitions, 12 changer transitions 0/68 dead transitions. [2021-10-15 20:25:06,012 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 68 transitions, 210 flow [2021-10-15 20:25:06,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-15 20:25:06,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-10-15 20:25:06,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 311 transitions. [2021-10-15 20:25:06,016 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.751207729468599 [2021-10-15 20:25:06,016 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 311 transitions. [2021-10-15 20:25:06,016 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 311 transitions. [2021-10-15 20:25:06,017 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:25:06,017 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 311 transitions. [2021-10-15 20:25:06,019 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 51.833333333333336) internal successors, (311), 6 states have internal predecessors, (311), 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 20:25:06,021 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 69.0) internal successors, (483), 7 states have internal predecessors, (483), 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 20:25:06,022 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 69.0) internal successors, (483), 7 states have internal predecessors, (483), 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 20:25:06,022 INFO L186 Difference]: Start difference. First operand has 51 places, 62 transitions, 154 flow. Second operand 6 states and 311 transitions. [2021-10-15 20:25:06,022 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 68 transitions, 210 flow [2021-10-15 20:25:06,025 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 68 transitions, 210 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-10-15 20:25:06,027 INFO L242 Difference]: Finished difference. Result has 58 places, 66 transitions, 198 flow [2021-10-15 20:25:06,032 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=69, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=198, PETRI_PLACES=58, PETRI_TRANSITIONS=66} [2021-10-15 20:25:06,033 INFO L334 CegarLoopForPetriNet]: 43 programPoint places, 15 predicate places. [2021-10-15 20:25:06,033 INFO L470 AbstractCegarLoop]: Abstraction has has 58 places, 66 transitions, 198 flow [2021-10-15 20:25:06,033 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 49.166666666666664) internal successors, (295), 6 states have internal predecessors, (295), 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 20:25:06,034 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:25:06,034 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:25:06,048 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77de9fd7-1435-4d19-9352-673075aa775c/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-10-15 20:25:06,248 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77de9fd7-1435-4d19-9352-673075aa775c/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 [2021-10-15 20:25:06,248 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:25:06,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:25:06,249 INFO L82 PathProgramCache]: Analyzing trace with hash -1380709804, now seen corresponding path program 1 times [2021-10-15 20:25:06,249 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-15 20:25:06,250 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1041790644] [2021-10-15 20:25:06,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:25:06,250 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-15 20:25:06,250 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77de9fd7-1435-4d19-9352-673075aa775c/bin/uautomizer-hJ6jxDFKc3/mathsat [2021-10-15 20:25:06,254 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77de9fd7-1435-4d19-9352-673075aa775c/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-15 20:25:06,272 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77de9fd7-1435-4d19-9352-673075aa775c/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-10-15 20:25:06,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:25:06,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-15 20:25:06,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:25:06,722 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 20:25:06,722 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-15 20:25:06,908 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 20:25:06,909 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-15 20:25:06,909 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1041790644] [2021-10-15 20:25:06,909 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1041790644] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-15 20:25:06,910 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:25:06,910 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 10 [2021-10-15 20:25:06,910 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953125302] [2021-10-15 20:25:06,911 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-15 20:25:06,911 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-15 20:25:06,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-15 20:25:06,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-10-15 20:25:06,914 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 39 out of 69 [2021-10-15 20:25:06,915 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 66 transitions, 198 flow. Second operand has 10 states, 10 states have (on average 40.5) internal successors, (405), 10 states have internal predecessors, (405), 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 20:25:06,916 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:25:06,916 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 39 of 69 [2021-10-15 20:25:06,916 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:25:07,407 INFO L129 PetriNetUnfolder]: 62/315 cut-off events. [2021-10-15 20:25:07,407 INFO L130 PetriNetUnfolder]: For 13/13 co-relation queries the response was YES. [2021-10-15 20:25:07,408 INFO L84 FinitePrefix]: Finished finitePrefix Result has 517 conditions, 315 events. 62/315 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1572 event pairs, 0 based on Foata normal form. 0/279 useless extension candidates. Maximal degree in co-relation 508. Up to 29 conditions per place. [2021-10-15 20:25:07,410 INFO L132 encePairwiseOnDemand]: 55/69 looper letters, 26 selfloop transitions, 20 changer transitions 0/87 dead transitions. [2021-10-15 20:25:07,410 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 87 transitions, 338 flow [2021-10-15 20:25:07,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-15 20:25:07,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2021-10-15 20:25:07,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 476 transitions. [2021-10-15 20:25:07,414 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6271409749670619 [2021-10-15 20:25:07,414 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 476 transitions. [2021-10-15 20:25:07,414 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 476 transitions. [2021-10-15 20:25:07,415 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:25:07,415 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 476 transitions. [2021-10-15 20:25:07,417 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 43.27272727272727) internal successors, (476), 11 states have internal predecessors, (476), 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 20:25:07,421 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 69.0) internal successors, (828), 12 states have internal predecessors, (828), 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 20:25:07,422 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 69.0) internal successors, (828), 12 states have internal predecessors, (828), 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 20:25:07,423 INFO L186 Difference]: Start difference. First operand has 58 places, 66 transitions, 198 flow. Second operand 11 states and 476 transitions. [2021-10-15 20:25:07,423 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 87 transitions, 338 flow [2021-10-15 20:25:07,428 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 87 transitions, 338 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-10-15 20:25:07,430 INFO L242 Difference]: Finished difference. Result has 72 places, 76 transitions, 293 flow [2021-10-15 20:25:07,431 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=69, PETRI_DIFFERENCE_MINUEND_FLOW=198, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=293, PETRI_PLACES=72, PETRI_TRANSITIONS=76} [2021-10-15 20:25:07,431 INFO L334 CegarLoopForPetriNet]: 43 programPoint places, 29 predicate places. [2021-10-15 20:25:07,431 INFO L470 AbstractCegarLoop]: Abstraction has has 72 places, 76 transitions, 293 flow [2021-10-15 20:25:07,432 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 40.5) internal successors, (405), 10 states have internal predecessors, (405), 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 20:25:07,432 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:25:07,432 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:25:07,451 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77de9fd7-1435-4d19-9352-673075aa775c/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-10-15 20:25:07,648 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77de9fd7-1435-4d19-9352-673075aa775c/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 [2021-10-15 20:25:07,648 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:25:07,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:25:07,649 INFO L82 PathProgramCache]: Analyzing trace with hash 147544209, now seen corresponding path program 1 times [2021-10-15 20:25:07,649 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-15 20:25:07,649 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1532680945] [2021-10-15 20:25:07,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:25:07,650 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-15 20:25:07,650 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77de9fd7-1435-4d19-9352-673075aa775c/bin/uautomizer-hJ6jxDFKc3/mathsat [2021-10-15 20:25:07,651 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77de9fd7-1435-4d19-9352-673075aa775c/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-15 20:25:07,652 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77de9fd7-1435-4d19-9352-673075aa775c/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-10-15 20:25:07,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:25:07,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-15 20:25:07,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:25:08,534 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 20:25:08,535 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-15 20:25:08,756 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 20:25:08,756 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-15 20:25:08,756 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1532680945] [2021-10-15 20:25:08,757 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1532680945] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-15 20:25:08,757 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:25:08,757 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [] total 15 [2021-10-15 20:25:08,757 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532040668] [2021-10-15 20:25:08,758 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-15 20:25:08,758 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-15 20:25:08,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-15 20:25:08,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2021-10-15 20:25:08,761 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 69 [2021-10-15 20:25:08,762 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 76 transitions, 293 flow. Second operand has 15 states, 15 states have (on average 33.6) internal successors, (504), 15 states have internal predecessors, (504), 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 20:25:08,762 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:25:08,762 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 69 [2021-10-15 20:25:08,763 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:25:11,897 INFO L129 PetriNetUnfolder]: 73/419 cut-off events. [2021-10-15 20:25:11,897 INFO L130 PetriNetUnfolder]: For 62/62 co-relation queries the response was YES. [2021-10-15 20:25:11,899 INFO L84 FinitePrefix]: Finished finitePrefix Result has 901 conditions, 419 events. 73/419 cut-off events. For 62/62 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 2438 event pairs, 0 based on Foata normal form. 1/405 useless extension candidates. Maximal degree in co-relation 888. Up to 79 conditions per place. [2021-10-15 20:25:11,901 INFO L132 encePairwiseOnDemand]: 54/69 looper letters, 55 selfloop transitions, 35 changer transitions 0/121 dead transitions. [2021-10-15 20:25:11,902 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 121 transitions, 642 flow [2021-10-15 20:25:11,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-15 20:25:11,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2021-10-15 20:25:11,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 623 transitions. [2021-10-15 20:25:11,906 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5311167945439045 [2021-10-15 20:25:11,906 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 623 transitions. [2021-10-15 20:25:11,907 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 623 transitions. [2021-10-15 20:25:11,907 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:25:11,908 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 623 transitions. [2021-10-15 20:25:11,910 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 36.64705882352941) internal successors, (623), 17 states have internal predecessors, (623), 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 20:25:11,914 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 69.0) internal successors, (1242), 18 states have internal predecessors, (1242), 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 20:25:11,915 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 69.0) internal successors, (1242), 18 states have internal predecessors, (1242), 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 20:25:11,915 INFO L186 Difference]: Start difference. First operand has 72 places, 76 transitions, 293 flow. Second operand 17 states and 623 transitions. [2021-10-15 20:25:11,915 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 121 transitions, 642 flow [2021-10-15 20:25:11,922 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 121 transitions, 632 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-10-15 20:25:11,926 INFO L242 Difference]: Finished difference. Result has 88 places, 89 transitions, 439 flow [2021-10-15 20:25:11,926 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=69, PETRI_DIFFERENCE_MINUEND_FLOW=287, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=439, PETRI_PLACES=88, PETRI_TRANSITIONS=89} [2021-10-15 20:25:11,927 INFO L334 CegarLoopForPetriNet]: 43 programPoint places, 45 predicate places. [2021-10-15 20:25:11,927 INFO L470 AbstractCegarLoop]: Abstraction has has 88 places, 89 transitions, 439 flow [2021-10-15 20:25:11,927 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 33.6) internal successors, (504), 15 states have internal predecessors, (504), 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 20:25:11,927 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:25:11,928 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:25:11,945 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77de9fd7-1435-4d19-9352-673075aa775c/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-10-15 20:25:12,141 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77de9fd7-1435-4d19-9352-673075aa775c/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 [2021-10-15 20:25:12,142 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:25:12,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:25:12,142 INFO L82 PathProgramCache]: Analyzing trace with hash -1845695531, now seen corresponding path program 1 times [2021-10-15 20:25:12,142 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-15 20:25:12,143 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1034373114] [2021-10-15 20:25:12,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:25:12,143 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-15 20:25:12,143 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77de9fd7-1435-4d19-9352-673075aa775c/bin/uautomizer-hJ6jxDFKc3/mathsat [2021-10-15 20:25:12,144 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77de9fd7-1435-4d19-9352-673075aa775c/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-15 20:25:12,147 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77de9fd7-1435-4d19-9352-673075aa775c/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-10-15 20:25:12,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:25:12,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-15 20:25:12,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:25:12,481 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 20:25:12,481 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-15 20:25:12,604 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 20:25:12,605 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-15 20:25:12,605 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1034373114] [2021-10-15 20:25:12,605 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1034373114] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-15 20:25:12,605 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:25:12,605 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 9 [2021-10-15 20:25:12,606 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462555753] [2021-10-15 20:25:12,609 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-15 20:25:12,609 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-15 20:25:12,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-15 20:25:12,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-10-15 20:25:12,611 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 39 out of 69 [2021-10-15 20:25:12,612 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 89 transitions, 439 flow. Second operand has 9 states, 9 states have (on average 40.55555555555556) internal successors, (365), 9 states have internal predecessors, (365), 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 20:25:12,612 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:25:12,612 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 39 of 69 [2021-10-15 20:25:12,612 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:25:13,041 INFO L129 PetriNetUnfolder]: 57/368 cut-off events. [2021-10-15 20:25:13,042 INFO L130 PetriNetUnfolder]: For 157/157 co-relation queries the response was YES. [2021-10-15 20:25:13,043 INFO L84 FinitePrefix]: Finished finitePrefix Result has 796 conditions, 368 events. 57/368 cut-off events. For 157/157 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 2090 event pairs, 0 based on Foata normal form. 1/345 useless extension candidates. Maximal degree in co-relation 780. Up to 44 conditions per place. [2021-10-15 20:25:13,045 INFO L132 encePairwiseOnDemand]: 54/69 looper letters, 25 selfloop transitions, 28 changer transitions 0/94 dead transitions. [2021-10-15 20:25:13,046 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 94 transitions, 541 flow [2021-10-15 20:25:13,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-15 20:25:13,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2021-10-15 20:25:13,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 513 transitions. [2021-10-15 20:25:13,050 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6195652173913043 [2021-10-15 20:25:13,050 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 513 transitions. [2021-10-15 20:25:13,050 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 513 transitions. [2021-10-15 20:25:13,051 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:25:13,051 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 513 transitions. [2021-10-15 20:25:13,053 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 42.75) internal successors, (513), 12 states have internal predecessors, (513), 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 20:25:13,056 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 69.0) internal successors, (897), 13 states have internal predecessors, (897), 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 20:25:13,056 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 69.0) internal successors, (897), 13 states have internal predecessors, (897), 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 20:25:13,057 INFO L186 Difference]: Start difference. First operand has 88 places, 89 transitions, 439 flow. Second operand 12 states and 513 transitions. [2021-10-15 20:25:13,057 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 94 transitions, 541 flow [2021-10-15 20:25:13,063 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 94 transitions, 514 flow, removed 5 selfloop flow, removed 6 redundant places. [2021-10-15 20:25:13,066 INFO L242 Difference]: Finished difference. Result has 95 places, 89 transitions, 462 flow [2021-10-15 20:25:13,066 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=69, PETRI_DIFFERENCE_MINUEND_FLOW=394, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=462, PETRI_PLACES=95, PETRI_TRANSITIONS=89} [2021-10-15 20:25:13,066 INFO L334 CegarLoopForPetriNet]: 43 programPoint places, 52 predicate places. [2021-10-15 20:25:13,067 INFO L470 AbstractCegarLoop]: Abstraction has has 95 places, 89 transitions, 462 flow [2021-10-15 20:25:13,067 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 40.55555555555556) internal successors, (365), 9 states have internal predecessors, (365), 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 20:25:13,067 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:25:13,068 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:25:13,089 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77de9fd7-1435-4d19-9352-673075aa775c/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-10-15 20:25:13,284 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77de9fd7-1435-4d19-9352-673075aa775c/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 [2021-10-15 20:25:13,284 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:25:13,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:25:13,284 INFO L82 PathProgramCache]: Analyzing trace with hash 156888005, now seen corresponding path program 1 times [2021-10-15 20:25:13,285 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-15 20:25:13,285 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1954764839] [2021-10-15 20:25:13,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:25:13,285 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-15 20:25:13,285 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77de9fd7-1435-4d19-9352-673075aa775c/bin/uautomizer-hJ6jxDFKc3/mathsat [2021-10-15 20:25:13,286 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77de9fd7-1435-4d19-9352-673075aa775c/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-15 20:25:13,287 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77de9fd7-1435-4d19-9352-673075aa775c/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-10-15 20:25:13,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:25:13,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-15 20:25:13,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:25:13,525 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 20:25:13,525 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-15 20:25:13,581 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 20:25:13,582 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-15 20:25:13,582 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1954764839] [2021-10-15 20:25:13,582 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1954764839] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-15 20:25:13,582 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:25:13,583 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-10-15 20:25:13,583 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669409179] [2021-10-15 20:25:13,584 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-15 20:25:13,585 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-15 20:25:13,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-15 20:25:13,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-15 20:25:13,594 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 69 [2021-10-15 20:25:13,596 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 89 transitions, 462 flow. Second operand has 6 states, 6 states have (on average 48.666666666666664) internal successors, (292), 6 states have internal predecessors, (292), 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 20:25:13,596 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:25:13,596 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 69 [2021-10-15 20:25:13,597 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:25:13,690 INFO L129 PetriNetUnfolder]: 49/360 cut-off events. [2021-10-15 20:25:13,690 INFO L130 PetriNetUnfolder]: For 252/252 co-relation queries the response was YES. [2021-10-15 20:25:13,692 INFO L84 FinitePrefix]: Finished finitePrefix Result has 799 conditions, 360 events. 49/360 cut-off events. For 252/252 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 1977 event pairs, 0 based on Foata normal form. 0/344 useless extension candidates. Maximal degree in co-relation 782. Up to 41 conditions per place. [2021-10-15 20:25:13,694 INFO L132 encePairwiseOnDemand]: 57/69 looper letters, 13 selfloop transitions, 14 changer transitions 0/93 dead transitions. [2021-10-15 20:25:13,694 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 93 transitions, 524 flow [2021-10-15 20:25:13,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-15 20:25:13,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-10-15 20:25:13,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 308 transitions. [2021-10-15 20:25:13,697 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7439613526570048 [2021-10-15 20:25:13,697 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 308 transitions. [2021-10-15 20:25:13,697 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 308 transitions. [2021-10-15 20:25:13,697 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:25:13,698 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 308 transitions. [2021-10-15 20:25:13,699 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 51.333333333333336) internal successors, (308), 6 states have internal predecessors, (308), 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 20:25:13,700 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 69.0) internal successors, (483), 7 states have internal predecessors, (483), 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 20:25:13,701 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 69.0) internal successors, (483), 7 states have internal predecessors, (483), 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 20:25:13,701 INFO L186 Difference]: Start difference. First operand has 95 places, 89 transitions, 462 flow. Second operand 6 states and 308 transitions. [2021-10-15 20:25:13,701 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 93 transitions, 524 flow [2021-10-15 20:25:13,706 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 93 transitions, 495 flow, removed 0 selfloop flow, removed 6 redundant places. [2021-10-15 20:25:13,709 INFO L242 Difference]: Finished difference. Result has 96 places, 93 transitions, 481 flow [2021-10-15 20:25:13,709 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=69, PETRI_DIFFERENCE_MINUEND_FLOW=433, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=481, PETRI_PLACES=96, PETRI_TRANSITIONS=93} [2021-10-15 20:25:13,709 INFO L334 CegarLoopForPetriNet]: 43 programPoint places, 53 predicate places. [2021-10-15 20:25:13,709 INFO L470 AbstractCegarLoop]: Abstraction has has 96 places, 93 transitions, 481 flow [2021-10-15 20:25:13,710 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 48.666666666666664) internal successors, (292), 6 states have internal predecessors, (292), 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 20:25:13,710 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:25:13,710 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:25:13,728 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77de9fd7-1435-4d19-9352-673075aa775c/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-10-15 20:25:13,924 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77de9fd7-1435-4d19-9352-673075aa775c/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 [2021-10-15 20:25:13,925 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:25:13,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:25:13,925 INFO L82 PathProgramCache]: Analyzing trace with hash -1621213116, now seen corresponding path program 1 times [2021-10-15 20:25:13,926 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-15 20:25:13,926 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1687591574] [2021-10-15 20:25:13,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:25:13,926 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-15 20:25:13,927 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77de9fd7-1435-4d19-9352-673075aa775c/bin/uautomizer-hJ6jxDFKc3/mathsat [2021-10-15 20:25:13,928 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77de9fd7-1435-4d19-9352-673075aa775c/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-15 20:25:13,935 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77de9fd7-1435-4d19-9352-673075aa775c/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-10-15 20:25:14,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:25:14,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-15 20:25:14,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:25:14,135 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 20:25:14,136 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-15 20:25:14,203 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 20:25:14,204 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-15 20:25:14,204 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1687591574] [2021-10-15 20:25:14,204 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1687591574] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-15 20:25:14,204 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:25:14,205 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-10-15 20:25:14,205 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970808563] [2021-10-15 20:25:14,206 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 20:25:14,206 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-15 20:25:14,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 20:25:14,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 20:25:14,207 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 69 [2021-10-15 20:25:14,208 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 93 transitions, 481 flow. Second operand has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 3 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:14,208 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:25:14,208 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 69 [2021-10-15 20:25:14,208 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:25:14,268 INFO L129 PetriNetUnfolder]: 49/354 cut-off events. [2021-10-15 20:25:14,268 INFO L130 PetriNetUnfolder]: For 226/226 co-relation queries the response was YES. [2021-10-15 20:25:14,269 INFO L84 FinitePrefix]: Finished finitePrefix Result has 811 conditions, 354 events. 49/354 cut-off events. For 226/226 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 1919 event pairs, 0 based on Foata normal form. 3/345 useless extension candidates. Maximal degree in co-relation 791. Up to 54 conditions per place. [2021-10-15 20:25:14,271 INFO L132 encePairwiseOnDemand]: 66/69 looper letters, 14 selfloop transitions, 2 changer transitions 0/93 dead transitions. [2021-10-15 20:25:14,272 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 93 transitions, 513 flow [2021-10-15 20:25:14,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 20:25:14,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 20:25:14,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 177 transitions. [2021-10-15 20:25:14,274 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.855072463768116 [2021-10-15 20:25:14,274 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 177 transitions. [2021-10-15 20:25:14,274 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 177 transitions. [2021-10-15 20:25:14,274 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:25:14,274 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 177 transitions. [2021-10-15 20:25:14,275 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 59.0) internal successors, (177), 3 states have internal predecessors, (177), 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 20:25:14,276 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 69.0) internal successors, (276), 4 states have internal predecessors, (276), 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 20:25:14,277 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 69.0) internal successors, (276), 4 states have internal predecessors, (276), 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 20:25:14,277 INFO L186 Difference]: Start difference. First operand has 96 places, 93 transitions, 481 flow. Second operand 3 states and 177 transitions. [2021-10-15 20:25:14,277 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 93 transitions, 513 flow [2021-10-15 20:25:14,282 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 93 transitions, 513 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-10-15 20:25:14,285 INFO L242 Difference]: Finished difference. Result has 99 places, 93 transitions, 489 flow [2021-10-15 20:25:14,285 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=69, PETRI_DIFFERENCE_MINUEND_FLOW=481, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=489, PETRI_PLACES=99, PETRI_TRANSITIONS=93} [2021-10-15 20:25:14,286 INFO L334 CegarLoopForPetriNet]: 43 programPoint places, 56 predicate places. [2021-10-15 20:25:14,286 INFO L470 AbstractCegarLoop]: Abstraction has has 99 places, 93 transitions, 489 flow [2021-10-15 20:25:14,286 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 3 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:14,286 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:25:14,287 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:25:14,305 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77de9fd7-1435-4d19-9352-673075aa775c/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-10-15 20:25:14,500 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77de9fd7-1435-4d19-9352-673075aa775c/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 [2021-10-15 20:25:14,500 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:25:14,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:25:14,501 INFO L82 PathProgramCache]: Analyzing trace with hash 1281876129, now seen corresponding path program 1 times [2021-10-15 20:25:14,501 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-15 20:25:14,501 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1361938921] [2021-10-15 20:25:14,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:25:14,501 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-15 20:25:14,502 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77de9fd7-1435-4d19-9352-673075aa775c/bin/uautomizer-hJ6jxDFKc3/mathsat [2021-10-15 20:25:14,505 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77de9fd7-1435-4d19-9352-673075aa775c/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-15 20:25:14,513 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77de9fd7-1435-4d19-9352-673075aa775c/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-10-15 20:25:14,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:25:14,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-15 20:25:14,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:25:14,918 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 20:25:14,919 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-15 20:25:15,050 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 20:25:15,050 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-15 20:25:15,050 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1361938921] [2021-10-15 20:25:15,051 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1361938921] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-15 20:25:15,051 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:25:15,051 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 9 [2021-10-15 20:25:15,051 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159234498] [2021-10-15 20:25:15,051 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-15 20:25:15,052 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-15 20:25:15,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-15 20:25:15,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-10-15 20:25:15,053 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 39 out of 69 [2021-10-15 20:25:15,054 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 93 transitions, 489 flow. Second operand has 9 states, 9 states have (on average 40.888888888888886) internal successors, (368), 9 states have internal predecessors, (368), 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 20:25:15,054 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:25:15,054 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 39 of 69 [2021-10-15 20:25:15,054 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:25:15,416 INFO L129 PetriNetUnfolder]: 46/339 cut-off events. [2021-10-15 20:25:15,416 INFO L130 PetriNetUnfolder]: For 270/270 co-relation queries the response was YES. [2021-10-15 20:25:15,418 INFO L84 FinitePrefix]: Finished finitePrefix Result has 858 conditions, 339 events. 46/339 cut-off events. For 270/270 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 1798 event pairs, 0 based on Foata normal form. 3/330 useless extension candidates. Maximal degree in co-relation 836. Up to 48 conditions per place. [2021-10-15 20:25:15,420 INFO L132 encePairwiseOnDemand]: 56/69 looper letters, 23 selfloop transitions, 25 changer transitions 0/95 dead transitions. [2021-10-15 20:25:15,420 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 95 transitions, 575 flow [2021-10-15 20:25:15,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-15 20:25:15,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-10-15 20:25:15,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 430 transitions. [2021-10-15 20:25:15,424 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6231884057971014 [2021-10-15 20:25:15,424 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 430 transitions. [2021-10-15 20:25:15,424 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 430 transitions. [2021-10-15 20:25:15,425 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:25:15,425 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 430 transitions. [2021-10-15 20:25:15,426 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 43.0) internal successors, (430), 10 states have internal predecessors, (430), 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 20:25:15,429 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 69.0) internal successors, (759), 11 states have internal predecessors, (759), 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 20:25:15,429 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 69.0) internal successors, (759), 11 states have internal predecessors, (759), 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 20:25:15,429 INFO L186 Difference]: Start difference. First operand has 99 places, 93 transitions, 489 flow. Second operand 10 states and 430 transitions. [2021-10-15 20:25:15,430 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 95 transitions, 575 flow [2021-10-15 20:25:15,435 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 95 transitions, 567 flow, removed 1 selfloop flow, removed 2 redundant places. [2021-10-15 20:25:15,438 INFO L242 Difference]: Finished difference. Result has 105 places, 90 transitions, 511 flow [2021-10-15 20:25:15,439 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=69, PETRI_DIFFERENCE_MINUEND_FLOW=461, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=511, PETRI_PLACES=105, PETRI_TRANSITIONS=90} [2021-10-15 20:25:15,439 INFO L334 CegarLoopForPetriNet]: 43 programPoint places, 62 predicate places. [2021-10-15 20:25:15,439 INFO L470 AbstractCegarLoop]: Abstraction has has 105 places, 90 transitions, 511 flow [2021-10-15 20:25:15,440 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 40.888888888888886) internal successors, (368), 9 states have internal predecessors, (368), 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 20:25:15,440 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:25:15,440 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:25:15,462 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77de9fd7-1435-4d19-9352-673075aa775c/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-10-15 20:25:15,658 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77de9fd7-1435-4d19-9352-673075aa775c/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 [2021-10-15 20:25:15,658 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:25:15,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:25:15,659 INFO L82 PathProgramCache]: Analyzing trace with hash 1741974657, now seen corresponding path program 1 times [2021-10-15 20:25:15,659 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-15 20:25:15,659 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [102251369] [2021-10-15 20:25:15,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:25:15,659 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-15 20:25:15,660 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77de9fd7-1435-4d19-9352-673075aa775c/bin/uautomizer-hJ6jxDFKc3/mathsat [2021-10-15 20:25:15,661 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77de9fd7-1435-4d19-9352-673075aa775c/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-15 20:25:15,668 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77de9fd7-1435-4d19-9352-673075aa775c/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-10-15 20:25:15,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:25:15,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-15 20:25:15,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:25:16,070 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 20:25:16,071 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-15 20:25:16,210 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 20:25:16,211 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-15 20:25:16,211 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [102251369] [2021-10-15 20:25:16,211 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [102251369] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-15 20:25:16,211 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:25:16,211 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 10 [2021-10-15 20:25:16,212 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973850428] [2021-10-15 20:25:16,213 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-15 20:25:16,213 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-15 20:25:16,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-15 20:25:16,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-10-15 20:25:16,215 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 69 [2021-10-15 20:25:16,216 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 90 transitions, 511 flow. Second operand has 10 states, 10 states have (on average 41.9) internal successors, (419), 10 states have internal predecessors, (419), 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 20:25:16,216 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:25:16,216 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 69 [2021-10-15 20:25:16,217 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:25:16,634 INFO L129 PetriNetUnfolder]: 46/291 cut-off events. [2021-10-15 20:25:16,634 INFO L130 PetriNetUnfolder]: For 371/371 co-relation queries the response was YES. [2021-10-15 20:25:16,635 INFO L84 FinitePrefix]: Finished finitePrefix Result has 783 conditions, 291 events. 46/291 cut-off events. For 371/371 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 1414 event pairs, 0 based on Foata normal form. 17/296 useless extension candidates. Maximal degree in co-relation 762. Up to 28 conditions per place. [2021-10-15 20:25:16,636 INFO L132 encePairwiseOnDemand]: 55/69 looper letters, 19 selfloop transitions, 14 changer transitions 9/89 dead transitions. [2021-10-15 20:25:16,636 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 89 transitions, 562 flow [2021-10-15 20:25:16,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-15 20:25:16,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-10-15 20:25:16,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 437 transitions. [2021-10-15 20:25:16,642 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6333333333333333 [2021-10-15 20:25:16,642 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 437 transitions. [2021-10-15 20:25:16,642 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 437 transitions. [2021-10-15 20:25:16,643 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:25:16,643 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 437 transitions. [2021-10-15 20:25:16,645 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 43.7) internal successors, (437), 10 states have internal predecessors, (437), 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 20:25:16,647 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 69.0) internal successors, (759), 11 states have internal predecessors, (759), 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 20:25:16,647 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 69.0) internal successors, (759), 11 states have internal predecessors, (759), 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 20:25:16,648 INFO L186 Difference]: Start difference. First operand has 105 places, 90 transitions, 511 flow. Second operand 10 states and 437 transitions. [2021-10-15 20:25:16,648 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 89 transitions, 562 flow [2021-10-15 20:25:16,653 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 89 transitions, 505 flow, removed 1 selfloop flow, removed 11 redundant places. [2021-10-15 20:25:16,655 INFO L242 Difference]: Finished difference. Result has 106 places, 80 transitions, 406 flow [2021-10-15 20:25:16,655 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=69, PETRI_DIFFERENCE_MINUEND_FLOW=419, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=406, PETRI_PLACES=106, PETRI_TRANSITIONS=80} [2021-10-15 20:25:16,656 INFO L334 CegarLoopForPetriNet]: 43 programPoint places, 63 predicate places. [2021-10-15 20:25:16,656 INFO L470 AbstractCegarLoop]: Abstraction has has 106 places, 80 transitions, 406 flow [2021-10-15 20:25:16,656 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 41.9) internal successors, (419), 10 states have internal predecessors, (419), 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 20:25:16,656 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:25:16,657 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:25:16,677 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77de9fd7-1435-4d19-9352-673075aa775c/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-10-15 20:25:16,869 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77de9fd7-1435-4d19-9352-673075aa775c/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 [2021-10-15 20:25:16,870 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:25:16,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:25:16,870 INFO L82 PathProgramCache]: Analyzing trace with hash 839729769, now seen corresponding path program 1 times [2021-10-15 20:25:16,871 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-15 20:25:16,871 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1364531428] [2021-10-15 20:25:16,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:25:16,871 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-15 20:25:16,871 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77de9fd7-1435-4d19-9352-673075aa775c/bin/uautomizer-hJ6jxDFKc3/mathsat [2021-10-15 20:25:16,872 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77de9fd7-1435-4d19-9352-673075aa775c/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-15 20:25:16,896 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77de9fd7-1435-4d19-9352-673075aa775c/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-10-15 20:25:17,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:25:17,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-15 20:25:17,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:25:17,269 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 20:25:17,269 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-15 20:25:17,416 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 20:25:17,417 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-15 20:25:17,417 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1364531428] [2021-10-15 20:25:17,417 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1364531428] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-15 20:25:17,417 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:25:17,417 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 11 [2021-10-15 20:25:17,417 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979002156] [2021-10-15 20:25:17,418 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-15 20:25:17,418 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-15 20:25:17,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-15 20:25:17,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-10-15 20:25:17,419 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 69 [2021-10-15 20:25:17,420 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 80 transitions, 406 flow. Second operand has 11 states, 11 states have (on average 39.72727272727273) internal successors, (437), 11 states have internal predecessors, (437), 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 20:25:17,420 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:25:17,420 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 69 [2021-10-15 20:25:17,420 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:25:17,785 INFO L129 PetriNetUnfolder]: 21/150 cut-off events. [2021-10-15 20:25:17,786 INFO L130 PetriNetUnfolder]: For 149/149 co-relation queries the response was YES. [2021-10-15 20:25:17,786 INFO L84 FinitePrefix]: Finished finitePrefix Result has 420 conditions, 150 events. 21/150 cut-off events. For 149/149 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 467 event pairs, 0 based on Foata normal form. 2/146 useless extension candidates. Maximal degree in co-relation 397. Up to 14 conditions per place. [2021-10-15 20:25:17,788 INFO L132 encePairwiseOnDemand]: 57/69 looper letters, 14 selfloop transitions, 12 changer transitions 4/72 dead transitions. [2021-10-15 20:25:17,788 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 72 transitions, 411 flow [2021-10-15 20:25:17,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-15 20:25:17,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2021-10-15 20:25:17,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 488 transitions. [2021-10-15 20:25:17,791 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5893719806763285 [2021-10-15 20:25:17,791 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 488 transitions. [2021-10-15 20:25:17,792 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 488 transitions. [2021-10-15 20:25:17,792 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:25:17,792 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 488 transitions. [2021-10-15 20:25:17,795 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 40.666666666666664) internal successors, (488), 12 states have internal predecessors, (488), 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 20:25:17,797 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 69.0) internal successors, (897), 13 states have internal predecessors, (897), 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 20:25:17,798 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 69.0) internal successors, (897), 13 states have internal predecessors, (897), 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 20:25:17,798 INFO L186 Difference]: Start difference. First operand has 106 places, 80 transitions, 406 flow. Second operand 12 states and 488 transitions. [2021-10-15 20:25:17,798 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 72 transitions, 411 flow [2021-10-15 20:25:17,801 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 72 transitions, 339 flow, removed 4 selfloop flow, removed 21 redundant places. [2021-10-15 20:25:17,803 INFO L242 Difference]: Finished difference. Result has 90 places, 68 transitions, 284 flow [2021-10-15 20:25:17,804 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=69, PETRI_DIFFERENCE_MINUEND_FLOW=279, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=284, PETRI_PLACES=90, PETRI_TRANSITIONS=68} [2021-10-15 20:25:17,804 INFO L334 CegarLoopForPetriNet]: 43 programPoint places, 47 predicate places. [2021-10-15 20:25:17,804 INFO L470 AbstractCegarLoop]: Abstraction has has 90 places, 68 transitions, 284 flow [2021-10-15 20:25:17,805 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 39.72727272727273) internal successors, (437), 11 states have internal predecessors, (437), 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 20:25:17,805 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:25:17,805 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:25:17,824 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77de9fd7-1435-4d19-9352-673075aa775c/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-10-15 20:25:18,019 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77de9fd7-1435-4d19-9352-673075aa775c/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 [2021-10-15 20:25:18,019 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:25:18,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:25:18,020 INFO L82 PathProgramCache]: Analyzing trace with hash -144403189, now seen corresponding path program 1 times [2021-10-15 20:25:18,020 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-15 20:25:18,020 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1632008807] [2021-10-15 20:25:18,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:25:18,020 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-15 20:25:18,021 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77de9fd7-1435-4d19-9352-673075aa775c/bin/uautomizer-hJ6jxDFKc3/mathsat [2021-10-15 20:25:18,022 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77de9fd7-1435-4d19-9352-673075aa775c/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-15 20:25:18,065 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77de9fd7-1435-4d19-9352-673075aa775c/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-10-15 20:25:18,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:25:18,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-15 20:25:18,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:25:18,514 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 20:25:18,515 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-15 20:25:19,040 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 20:25:19,040 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-15 20:25:19,041 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1632008807] [2021-10-15 20:25:19,041 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1632008807] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-15 20:25:19,041 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:25:19,041 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 10 [2021-10-15 20:25:19,041 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443909340] [2021-10-15 20:25:19,042 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-15 20:25:19,042 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-15 20:25:19,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-15 20:25:19,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-10-15 20:25:19,043 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 69 [2021-10-15 20:25:19,044 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 68 transitions, 284 flow. Second operand has 10 states, 10 states have (on average 39.8) internal successors, (398), 10 states have internal predecessors, (398), 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 20:25:19,044 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:25:19,044 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 69 [2021-10-15 20:25:19,044 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:25:19,459 INFO L129 PetriNetUnfolder]: 18/143 cut-off events. [2021-10-15 20:25:19,459 INFO L130 PetriNetUnfolder]: For 64/64 co-relation queries the response was YES. [2021-10-15 20:25:19,460 INFO L84 FinitePrefix]: Finished finitePrefix Result has 360 conditions, 143 events. 18/143 cut-off events. For 64/64 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 442 event pairs, 0 based on Foata normal form. 0/140 useless extension candidates. Maximal degree in co-relation 345. Up to 18 conditions per place. [2021-10-15 20:25:19,461 INFO L132 encePairwiseOnDemand]: 59/69 looper letters, 18 selfloop transitions, 11 changer transitions 0/70 dead transitions. [2021-10-15 20:25:19,461 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 70 transitions, 350 flow [2021-10-15 20:25:19,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-15 20:25:19,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-10-15 20:25:19,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 372 transitions. [2021-10-15 20:25:19,464 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5990338164251208 [2021-10-15 20:25:19,464 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 372 transitions. [2021-10-15 20:25:19,464 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 372 transitions. [2021-10-15 20:25:19,465 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:25:19,465 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 372 transitions. [2021-10-15 20:25:19,466 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 41.333333333333336) internal successors, (372), 9 states have internal predecessors, (372), 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 20:25:19,468 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 69.0) internal successors, (690), 10 states have internal predecessors, (690), 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 20:25:19,469 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 69.0) internal successors, (690), 10 states have internal predecessors, (690), 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 20:25:19,469 INFO L186 Difference]: Start difference. First operand has 90 places, 68 transitions, 284 flow. Second operand 9 states and 372 transitions. [2021-10-15 20:25:19,469 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 70 transitions, 350 flow [2021-10-15 20:25:19,472 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 70 transitions, 319 flow, removed 0 selfloop flow, removed 13 redundant places. [2021-10-15 20:25:19,473 INFO L242 Difference]: Finished difference. Result has 82 places, 68 transitions, 280 flow [2021-10-15 20:25:19,474 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=69, PETRI_DIFFERENCE_MINUEND_FLOW=253, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=280, PETRI_PLACES=82, PETRI_TRANSITIONS=68} [2021-10-15 20:25:19,474 INFO L334 CegarLoopForPetriNet]: 43 programPoint places, 39 predicate places. [2021-10-15 20:25:19,474 INFO L470 AbstractCegarLoop]: Abstraction has has 82 places, 68 transitions, 280 flow [2021-10-15 20:25:19,475 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 39.8) internal successors, (398), 10 states have internal predecessors, (398), 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 20:25:19,475 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:25:19,475 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:25:19,490 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77de9fd7-1435-4d19-9352-673075aa775c/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-10-15 20:25:19,689 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77de9fd7-1435-4d19-9352-673075aa775c/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 [2021-10-15 20:25:19,689 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:25:19,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:25:19,690 INFO L82 PathProgramCache]: Analyzing trace with hash -953749815, now seen corresponding path program 1 times [2021-10-15 20:25:19,690 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-15 20:25:19,690 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1210887985] [2021-10-15 20:25:19,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:25:19,691 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-15 20:25:19,691 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77de9fd7-1435-4d19-9352-673075aa775c/bin/uautomizer-hJ6jxDFKc3/mathsat [2021-10-15 20:25:19,692 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77de9fd7-1435-4d19-9352-673075aa775c/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-15 20:25:19,700 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77de9fd7-1435-4d19-9352-673075aa775c/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-10-15 20:25:19,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:25:19,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-15 20:25:19,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:25:20,443 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 20:25:20,443 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-15 20:25:20,864 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 20:25:20,865 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-15 20:25:20,865 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1210887985] [2021-10-15 20:25:20,865 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1210887985] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-15 20:25:20,865 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:25:20,865 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [] total 16 [2021-10-15 20:25:20,865 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380270532] [2021-10-15 20:25:20,866 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-15 20:25:20,866 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-15 20:25:20,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-15 20:25:20,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2021-10-15 20:25:20,868 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 69 [2021-10-15 20:25:20,869 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 68 transitions, 280 flow. Second operand has 16 states, 16 states have (on average 29.5) internal successors, (472), 16 states have internal predecessors, (472), 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 20:25:20,869 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:25:20,870 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 69 [2021-10-15 20:25:20,870 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:25:22,637 INFO L129 PetriNetUnfolder]: 14/178 cut-off events. [2021-10-15 20:25:22,637 INFO L130 PetriNetUnfolder]: For 120/120 co-relation queries the response was YES. [2021-10-15 20:25:22,638 INFO L84 FinitePrefix]: Finished finitePrefix Result has 471 conditions, 178 events. 14/178 cut-off events. For 120/120 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 693 event pairs, 0 based on Foata normal form. 2/180 useless extension candidates. Maximal degree in co-relation 457. Up to 23 conditions per place. [2021-10-15 20:25:22,639 INFO L132 encePairwiseOnDemand]: 56/69 looper letters, 48 selfloop transitions, 18 changer transitions 4/100 dead transitions. [2021-10-15 20:25:22,639 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 100 transitions, 571 flow [2021-10-15 20:25:22,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-15 20:25:22,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2021-10-15 20:25:22,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 459 transitions. [2021-10-15 20:25:22,643 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.4751552795031056 [2021-10-15 20:25:22,643 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 459 transitions. [2021-10-15 20:25:22,643 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 459 transitions. [2021-10-15 20:25:22,643 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:25:22,644 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 459 transitions. [2021-10-15 20:25:22,645 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 32.785714285714285) internal successors, (459), 14 states have internal predecessors, (459), 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 20:25:22,648 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 69.0) internal successors, (1035), 15 states have internal predecessors, (1035), 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 20:25:22,648 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 69.0) internal successors, (1035), 15 states have internal predecessors, (1035), 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 20:25:22,648 INFO L186 Difference]: Start difference. First operand has 82 places, 68 transitions, 280 flow. Second operand 14 states and 459 transitions. [2021-10-15 20:25:22,648 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 100 transitions, 571 flow [2021-10-15 20:25:22,652 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 100 transitions, 521 flow, removed 0 selfloop flow, removed 8 redundant places. [2021-10-15 20:25:22,654 INFO L242 Difference]: Finished difference. Result has 94 places, 75 transitions, 350 flow [2021-10-15 20:25:22,654 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=69, PETRI_DIFFERENCE_MINUEND_FLOW=258, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=350, PETRI_PLACES=94, PETRI_TRANSITIONS=75} [2021-10-15 20:25:22,655 INFO L334 CegarLoopForPetriNet]: 43 programPoint places, 51 predicate places. [2021-10-15 20:25:22,655 INFO L470 AbstractCegarLoop]: Abstraction has has 94 places, 75 transitions, 350 flow [2021-10-15 20:25:22,655 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 29.5) internal successors, (472), 16 states have internal predecessors, (472), 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 20:25:22,655 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:25:22,656 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:25:22,676 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77de9fd7-1435-4d19-9352-673075aa775c/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-10-15 20:25:22,876 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77de9fd7-1435-4d19-9352-673075aa775c/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 [2021-10-15 20:25:22,876 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:25:22,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:25:22,877 INFO L82 PathProgramCache]: Analyzing trace with hash -1548503636, now seen corresponding path program 1 times [2021-10-15 20:25:22,878 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-15 20:25:22,878 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1508788843] [2021-10-15 20:25:22,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:25:22,878 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-15 20:25:22,878 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77de9fd7-1435-4d19-9352-673075aa775c/bin/uautomizer-hJ6jxDFKc3/mathsat [2021-10-15 20:25:22,879 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77de9fd7-1435-4d19-9352-673075aa775c/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-15 20:25:22,923 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77de9fd7-1435-4d19-9352-673075aa775c/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-10-15 20:25:23,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:25:23,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 22 conjunts are in the unsatisfiable core [2021-10-15 20:25:23,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:25:23,706 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 20:25:23,706 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-15 20:25:24,047 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 20:25:24,048 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-15 20:25:24,048 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1508788843] [2021-10-15 20:25:24,048 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1508788843] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-15 20:25:24,048 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:25:24,048 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12, 12] imperfect sequences [] total 15 [2021-10-15 20:25:24,048 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312484182] [2021-10-15 20:25:24,049 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-15 20:25:24,049 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-15 20:25:24,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-15 20:25:24,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-10-15 20:25:24,050 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 69 [2021-10-15 20:25:24,051 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 75 transitions, 350 flow. Second operand has 15 states, 15 states have (on average 19.6) internal successors, (294), 15 states have internal predecessors, (294), 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 20:25:24,053 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:25:24,053 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 69 [2021-10-15 20:25:24,053 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:25:26,371 INFO L129 PetriNetUnfolder]: 9/222 cut-off events. [2021-10-15 20:25:26,371 INFO L130 PetriNetUnfolder]: For 190/190 co-relation queries the response was YES. [2021-10-15 20:25:26,372 INFO L84 FinitePrefix]: Finished finitePrefix Result has 658 conditions, 222 events. 9/222 cut-off events. For 190/190 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1042 event pairs, 0 based on Foata normal form. 1/223 useless extension candidates. Maximal degree in co-relation 637. Up to 23 conditions per place. [2021-10-15 20:25:26,373 INFO L132 encePairwiseOnDemand]: 44/69 looper letters, 62 selfloop transitions, 42 changer transitions 31/154 dead transitions. [2021-10-15 20:25:26,373 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 154 transitions, 975 flow [2021-10-15 20:25:26,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-10-15 20:25:26,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2021-10-15 20:25:26,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 820 transitions. [2021-10-15 20:25:26,378 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.3127383676582761 [2021-10-15 20:25:26,378 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 820 transitions. [2021-10-15 20:25:26,378 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 820 transitions. [2021-10-15 20:25:26,379 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:25:26,379 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 820 transitions. [2021-10-15 20:25:26,382 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 21.57894736842105) internal successors, (820), 38 states have internal predecessors, (820), 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 20:25:26,387 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 69.0) internal successors, (2691), 39 states have internal predecessors, (2691), 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 20:25:26,388 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 69.0) internal successors, (2691), 39 states have internal predecessors, (2691), 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 20:25:26,388 INFO L186 Difference]: Start difference. First operand has 94 places, 75 transitions, 350 flow. Second operand 38 states and 820 transitions. [2021-10-15 20:25:26,389 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 154 transitions, 975 flow [2021-10-15 20:25:26,393 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 154 transitions, 887 flow, removed 1 selfloop flow, removed 9 redundant places. [2021-10-15 20:25:26,396 INFO L242 Difference]: Finished difference. Result has 123 places, 85 transitions, 477 flow [2021-10-15 20:25:26,396 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=69, PETRI_DIFFERENCE_MINUEND_FLOW=290, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=477, PETRI_PLACES=123, PETRI_TRANSITIONS=85} [2021-10-15 20:25:26,397 INFO L334 CegarLoopForPetriNet]: 43 programPoint places, 80 predicate places. [2021-10-15 20:25:26,397 INFO L470 AbstractCegarLoop]: Abstraction has has 123 places, 85 transitions, 477 flow [2021-10-15 20:25:26,397 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 19.6) internal successors, (294), 15 states have internal predecessors, (294), 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 20:25:26,397 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:25:26,398 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:25:26,416 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77de9fd7-1435-4d19-9352-673075aa775c/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-10-15 20:25:26,611 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77de9fd7-1435-4d19-9352-673075aa775c/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 [2021-10-15 20:25:26,612 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:25:26,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:25:26,612 INFO L82 PathProgramCache]: Analyzing trace with hash 1364791880, now seen corresponding path program 1 times [2021-10-15 20:25:26,613 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-15 20:25:26,613 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [274768460] [2021-10-15 20:25:26,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:25:26,613 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-15 20:25:26,614 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77de9fd7-1435-4d19-9352-673075aa775c/bin/uautomizer-hJ6jxDFKc3/mathsat [2021-10-15 20:25:26,615 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77de9fd7-1435-4d19-9352-673075aa775c/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-15 20:25:26,616 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77de9fd7-1435-4d19-9352-673075aa775c/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-10-15 20:25:26,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:25:26,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-15 20:25:26,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:25:27,364 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 20:25:27,364 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-15 20:25:27,625 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 20:25:27,631 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-15 20:25:27,631 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [274768460] [2021-10-15 20:25:27,631 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [274768460] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-15 20:25:27,631 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:25:27,631 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10, 10] imperfect sequences [] total 12 [2021-10-15 20:25:27,631 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385217056] [2021-10-15 20:25:27,632 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-15 20:25:27,632 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-15 20:25:27,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-15 20:25:27,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-10-15 20:25:27,633 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 69 [2021-10-15 20:25:27,634 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 85 transitions, 477 flow. Second operand has 12 states, 12 states have (on average 24.0) internal successors, (288), 12 states have internal predecessors, (288), 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 20:25:27,634 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:25:27,634 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 69 [2021-10-15 20:25:27,634 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:25:28,404 INFO L129 PetriNetUnfolder]: 4/159 cut-off events. [2021-10-15 20:25:28,404 INFO L130 PetriNetUnfolder]: For 166/166 co-relation queries the response was YES. [2021-10-15 20:25:28,405 INFO L84 FinitePrefix]: Finished finitePrefix Result has 457 conditions, 159 events. 4/159 cut-off events. For 166/166 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 704 event pairs, 0 based on Foata normal form. 1/160 useless extension candidates. Maximal degree in co-relation 434. Up to 15 conditions per place. [2021-10-15 20:25:28,406 INFO L132 encePairwiseOnDemand]: 52/69 looper letters, 38 selfloop transitions, 37 changer transitions 0/101 dead transitions. [2021-10-15 20:25:28,406 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 101 transitions, 646 flow [2021-10-15 20:25:28,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-10-15 20:25:28,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2021-10-15 20:25:28,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 528 transitions. [2021-10-15 20:25:28,408 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.36438923395445133 [2021-10-15 20:25:28,408 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 528 transitions. [2021-10-15 20:25:28,408 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 528 transitions. [2021-10-15 20:25:28,409 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:25:28,409 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 528 transitions. [2021-10-15 20:25:28,411 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 25.142857142857142) internal successors, (528), 21 states have internal predecessors, (528), 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 20:25:28,413 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 69.0) internal successors, (1518), 22 states have internal predecessors, (1518), 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 20:25:28,414 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 69.0) internal successors, (1518), 22 states have internal predecessors, (1518), 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 20:25:28,414 INFO L186 Difference]: Start difference. First operand has 123 places, 85 transitions, 477 flow. Second operand 21 states and 528 transitions. [2021-10-15 20:25:28,414 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 101 transitions, 646 flow [2021-10-15 20:25:28,424 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 101 transitions, 519 flow, removed 27 selfloop flow, removed 21 redundant places. [2021-10-15 20:25:28,426 INFO L242 Difference]: Finished difference. Result has 103 places, 81 transitions, 403 flow [2021-10-15 20:25:28,427 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=69, PETRI_DIFFERENCE_MINUEND_FLOW=329, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=403, PETRI_PLACES=103, PETRI_TRANSITIONS=81} [2021-10-15 20:25:28,427 INFO L334 CegarLoopForPetriNet]: 43 programPoint places, 60 predicate places. [2021-10-15 20:25:28,427 INFO L470 AbstractCegarLoop]: Abstraction has has 103 places, 81 transitions, 403 flow [2021-10-15 20:25:28,428 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 24.0) internal successors, (288), 12 states have internal predecessors, (288), 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 20:25:28,428 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:25:28,428 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:25:28,446 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77de9fd7-1435-4d19-9352-673075aa775c/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-10-15 20:25:28,643 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77de9fd7-1435-4d19-9352-673075aa775c/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 [2021-10-15 20:25:28,643 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:25:28,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:25:28,644 INFO L82 PathProgramCache]: Analyzing trace with hash 430789518, now seen corresponding path program 1 times [2021-10-15 20:25:28,644 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-15 20:25:28,644 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1902145278] [2021-10-15 20:25:28,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:25:28,645 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-15 20:25:28,645 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77de9fd7-1435-4d19-9352-673075aa775c/bin/uautomizer-hJ6jxDFKc3/mathsat [2021-10-15 20:25:28,646 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77de9fd7-1435-4d19-9352-673075aa775c/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-15 20:25:28,650 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77de9fd7-1435-4d19-9352-673075aa775c/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-10-15 20:25:29,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:25:29,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-15 20:25:29,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:25:29,230 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 20:25:29,230 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-15 20:25:29,581 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 20:25:29,582 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-15 20:25:29,582 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1902145278] [2021-10-15 20:25:29,582 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1902145278] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-15 20:25:29,582 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:25:29,582 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 10 [2021-10-15 20:25:29,582 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932741705] [2021-10-15 20:25:29,583 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-15 20:25:29,583 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-15 20:25:29,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-15 20:25:29,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-10-15 20:25:29,584 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 69 [2021-10-15 20:25:29,585 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 81 transitions, 403 flow. Second operand has 10 states, 10 states have (on average 38.3) internal successors, (383), 10 states have internal predecessors, (383), 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 20:25:29,585 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:25:29,585 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 69 [2021-10-15 20:25:29,585 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:25:30,163 INFO L129 PetriNetUnfolder]: 4/104 cut-off events. [2021-10-15 20:25:30,163 INFO L130 PetriNetUnfolder]: For 95/95 co-relation queries the response was YES. [2021-10-15 20:25:30,163 INFO L84 FinitePrefix]: Finished finitePrefix Result has 274 conditions, 104 events. 4/104 cut-off events. For 95/95 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 287 event pairs, 0 based on Foata normal form. 5/109 useless extension candidates. Maximal degree in co-relation 262. Up to 20 conditions per place. [2021-10-15 20:25:30,164 INFO L132 encePairwiseOnDemand]: 61/69 looper letters, 15 selfloop transitions, 15 changer transitions 0/66 dead transitions. [2021-10-15 20:25:30,164 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 66 transitions, 381 flow [2021-10-15 20:25:30,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-15 20:25:30,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-10-15 20:25:30,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 306 transitions. [2021-10-15 20:25:30,166 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5543478260869565 [2021-10-15 20:25:30,166 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 306 transitions. [2021-10-15 20:25:30,166 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 306 transitions. [2021-10-15 20:25:30,167 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:25:30,167 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 306 transitions. [2021-10-15 20:25:30,168 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 38.25) internal successors, (306), 8 states have internal predecessors, (306), 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 20:25:30,169 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 69.0) internal successors, (621), 9 states have internal predecessors, (621), 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 20:25:30,169 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 69.0) internal successors, (621), 9 states have internal predecessors, (621), 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 20:25:30,169 INFO L186 Difference]: Start difference. First operand has 103 places, 81 transitions, 403 flow. Second operand 8 states and 306 transitions. [2021-10-15 20:25:30,169 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 66 transitions, 381 flow [2021-10-15 20:25:30,172 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 66 transitions, 333 flow, removed 0 selfloop flow, removed 15 redundant places. [2021-10-15 20:25:30,174 INFO L242 Difference]: Finished difference. Result has 85 places, 66 transitions, 303 flow [2021-10-15 20:25:30,174 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=69, PETRI_DIFFERENCE_MINUEND_FLOW=273, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=303, PETRI_PLACES=85, PETRI_TRANSITIONS=66} [2021-10-15 20:25:30,174 INFO L334 CegarLoopForPetriNet]: 43 programPoint places, 42 predicate places. [2021-10-15 20:25:30,174 INFO L470 AbstractCegarLoop]: Abstraction has has 85 places, 66 transitions, 303 flow [2021-10-15 20:25:30,175 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 38.3) internal successors, (383), 10 states have internal predecessors, (383), 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 20:25:30,175 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:25:30,175 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:25:30,192 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77de9fd7-1435-4d19-9352-673075aa775c/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-10-15 20:25:30,375 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77de9fd7-1435-4d19-9352-673075aa775c/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 [2021-10-15 20:25:30,376 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:25:30,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:25:30,376 INFO L82 PathProgramCache]: Analyzing trace with hash 1131854096, now seen corresponding path program 1 times [2021-10-15 20:25:30,376 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-15 20:25:30,376 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1994614170] [2021-10-15 20:25:30,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:25:30,377 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-15 20:25:30,377 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77de9fd7-1435-4d19-9352-673075aa775c/bin/uautomizer-hJ6jxDFKc3/mathsat [2021-10-15 20:25:30,378 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77de9fd7-1435-4d19-9352-673075aa775c/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-15 20:25:30,418 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77de9fd7-1435-4d19-9352-673075aa775c/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-10-15 20:25:30,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:25:30,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-15 20:25:30,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:25:30,928 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 20:25:30,928 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-15 20:25:31,220 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 20:25:31,220 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-15 20:25:31,221 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1994614170] [2021-10-15 20:25:31,221 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1994614170] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-15 20:25:31,221 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:25:31,221 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 14 [2021-10-15 20:25:31,222 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665965002] [2021-10-15 20:25:31,222 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-15 20:25:31,222 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-15 20:25:31,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-15 20:25:31,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-10-15 20:25:31,224 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 69 [2021-10-15 20:25:31,224 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 66 transitions, 303 flow. Second operand has 14 states, 14 states have (on average 20.142857142857142) internal successors, (282), 14 states have internal predecessors, (282), 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 20:25:31,225 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:25:31,225 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 69 [2021-10-15 20:25:31,225 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:25:31,776 INFO L129 PetriNetUnfolder]: 4/48 cut-off events. [2021-10-15 20:25:31,776 INFO L130 PetriNetUnfolder]: For 42/42 co-relation queries the response was YES. [2021-10-15 20:25:31,776 INFO L84 FinitePrefix]: Finished finitePrefix Result has 131 conditions, 48 events. 4/48 cut-off events. For 42/42 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 32 event pairs, 0 based on Foata normal form. 4/52 useless extension candidates. Maximal degree in co-relation 120. Up to 8 conditions per place. [2021-10-15 20:25:31,776 INFO L132 encePairwiseOnDemand]: 55/69 looper letters, 20 selfloop transitions, 13 changer transitions 0/46 dead transitions. [2021-10-15 20:25:31,776 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 46 transitions, 231 flow [2021-10-15 20:25:31,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-15 20:25:31,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2021-10-15 20:25:31,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 233 transitions. [2021-10-15 20:25:31,777 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.3069828722002635 [2021-10-15 20:25:31,778 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 233 transitions. [2021-10-15 20:25:31,778 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 233 transitions. [2021-10-15 20:25:31,778 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:25:31,778 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 233 transitions. [2021-10-15 20:25:31,779 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 21.181818181818183) internal successors, (233), 11 states have internal predecessors, (233), 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 20:25:31,780 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 69.0) internal successors, (828), 12 states have internal predecessors, (828), 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 20:25:31,781 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 69.0) internal successors, (828), 12 states have internal predecessors, (828), 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 20:25:31,781 INFO L186 Difference]: Start difference. First operand has 85 places, 66 transitions, 303 flow. Second operand 11 states and 233 transitions. [2021-10-15 20:25:31,781 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 46 transitions, 231 flow [2021-10-15 20:25:31,782 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 46 transitions, 164 flow, removed 7 selfloop flow, removed 21 redundant places. [2021-10-15 20:25:31,783 INFO L242 Difference]: Finished difference. Result has 57 places, 46 transitions, 124 flow [2021-10-15 20:25:31,783 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=69, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=124, PETRI_PLACES=57, PETRI_TRANSITIONS=46} [2021-10-15 20:25:31,783 INFO L334 CegarLoopForPetriNet]: 43 programPoint places, 14 predicate places. [2021-10-15 20:25:31,783 INFO L470 AbstractCegarLoop]: Abstraction has has 57 places, 46 transitions, 124 flow [2021-10-15 20:25:31,784 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 20.142857142857142) internal successors, (282), 14 states have internal predecessors, (282), 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 20:25:31,784 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:25:31,784 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:25:31,794 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77de9fd7-1435-4d19-9352-673075aa775c/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-10-15 20:25:31,984 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77de9fd7-1435-4d19-9352-673075aa775c/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 [2021-10-15 20:25:31,985 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:25:31,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:25:31,985 INFO L82 PathProgramCache]: Analyzing trace with hash -1713269395, now seen corresponding path program 1 times [2021-10-15 20:25:31,985 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-15 20:25:31,985 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [275401594] [2021-10-15 20:25:31,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:25:31,985 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-15 20:25:31,986 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77de9fd7-1435-4d19-9352-673075aa775c/bin/uautomizer-hJ6jxDFKc3/mathsat [2021-10-15 20:25:31,986 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77de9fd7-1435-4d19-9352-673075aa775c/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-15 20:25:31,987 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77de9fd7-1435-4d19-9352-673075aa775c/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-10-15 20:25:32,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:25:32,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-15 20:25:32,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:25:32,885 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 20:25:32,885 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-15 20:25:33,128 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 20:25:33,128 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-15 20:25:33,128 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [275401594] [2021-10-15 20:25:33,128 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [275401594] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-15 20:25:33,129 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:25:33,129 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 12 [2021-10-15 20:25:33,129 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138704746] [2021-10-15 20:25:33,129 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-15 20:25:33,129 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-15 20:25:33,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-15 20:25:33,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-10-15 20:25:33,131 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 69 [2021-10-15 20:25:33,132 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 46 transitions, 124 flow. Second operand has 12 states, 12 states have (on average 33.333333333333336) internal successors, (400), 12 states have internal predecessors, (400), 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 20:25:33,132 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:25:33,132 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 69 [2021-10-15 20:25:33,132 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:25:34,212 INFO L129 PetriNetUnfolder]: 2/82 cut-off events. [2021-10-15 20:25:34,212 INFO L130 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2021-10-15 20:25:34,212 INFO L84 FinitePrefix]: Finished finitePrefix Result has 152 conditions, 82 events. 2/82 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 149 event pairs, 0 based on Foata normal form. 2/82 useless extension candidates. Maximal degree in co-relation 146. Up to 13 conditions per place. [2021-10-15 20:25:34,212 INFO L132 encePairwiseOnDemand]: 59/69 looper letters, 25 selfloop transitions, 10 changer transitions 6/61 dead transitions. [2021-10-15 20:25:34,212 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 61 transitions, 244 flow [2021-10-15 20:25:34,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-15 20:25:34,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2021-10-15 20:25:34,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 413 transitions. [2021-10-15 20:25:34,214 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.49879227053140096 [2021-10-15 20:25:34,214 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 413 transitions. [2021-10-15 20:25:34,214 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 413 transitions. [2021-10-15 20:25:34,214 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:25:34,214 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 413 transitions. [2021-10-15 20:25:34,215 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 34.416666666666664) internal successors, (413), 12 states have internal predecessors, (413), 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 20:25:34,220 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 69.0) internal successors, (897), 13 states have internal predecessors, (897), 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 20:25:34,220 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 69.0) internal successors, (897), 13 states have internal predecessors, (897), 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 20:25:34,220 INFO L186 Difference]: Start difference. First operand has 57 places, 46 transitions, 124 flow. Second operand 12 states and 413 transitions. [2021-10-15 20:25:34,221 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 61 transitions, 244 flow [2021-10-15 20:25:34,222 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 61 transitions, 210 flow, removed 0 selfloop flow, removed 10 redundant places. [2021-10-15 20:25:34,223 INFO L242 Difference]: Finished difference. Result has 62 places, 45 transitions, 124 flow [2021-10-15 20:25:34,223 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=69, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=124, PETRI_PLACES=62, PETRI_TRANSITIONS=45} [2021-10-15 20:25:34,223 INFO L334 CegarLoopForPetriNet]: 43 programPoint places, 19 predicate places. [2021-10-15 20:25:34,224 INFO L470 AbstractCegarLoop]: Abstraction has has 62 places, 45 transitions, 124 flow [2021-10-15 20:25:34,224 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 33.333333333333336) internal successors, (400), 12 states have internal predecessors, (400), 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 20:25:34,224 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:25:34,224 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:25:34,243 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77de9fd7-1435-4d19-9352-673075aa775c/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-10-15 20:25:34,439 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77de9fd7-1435-4d19-9352-673075aa775c/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 [2021-10-15 20:25:34,439 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:25:34,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:25:34,439 INFO L82 PathProgramCache]: Analyzing trace with hash 739407273, now seen corresponding path program 1 times [2021-10-15 20:25:34,439 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-15 20:25:34,440 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1752969604] [2021-10-15 20:25:34,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:25:34,440 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-15 20:25:34,440 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77de9fd7-1435-4d19-9352-673075aa775c/bin/uautomizer-hJ6jxDFKc3/mathsat [2021-10-15 20:25:34,440 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77de9fd7-1435-4d19-9352-673075aa775c/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-15 20:25:34,444 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77de9fd7-1435-4d19-9352-673075aa775c/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-10-15 20:25:34,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:25:34,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-15 20:25:34,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:25:34,882 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 20:25:34,882 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-15 20:25:34,949 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 20:25:34,949 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-15 20:25:34,949 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1752969604] [2021-10-15 20:25:34,949 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1752969604] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-15 20:25:34,949 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:25:34,949 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-10-15 20:25:34,949 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061516479] [2021-10-15 20:25:34,950 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-15 20:25:34,950 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-15 20:25:34,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-15 20:25:34,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-15 20:25:34,951 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 69 [2021-10-15 20:25:34,951 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 45 transitions, 124 flow. Second operand has 4 states, 4 states have (on average 48.75) internal successors, (195), 4 states have internal predecessors, (195), 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 20:25:34,951 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:25:34,951 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 69 [2021-10-15 20:25:34,952 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:25:34,982 INFO L129 PetriNetUnfolder]: 2/42 cut-off events. [2021-10-15 20:25:34,982 INFO L130 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2021-10-15 20:25:34,983 INFO L84 FinitePrefix]: Finished finitePrefix Result has 82 conditions, 42 events. 2/42 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 48 event pairs, 0 based on Foata normal form. 2/44 useless extension candidates. Maximal degree in co-relation 72. Up to 14 conditions per place. [2021-10-15 20:25:34,983 INFO L132 encePairwiseOnDemand]: 66/69 looper letters, 0 selfloop transitions, 0 changer transitions 33/33 dead transitions. [2021-10-15 20:25:34,983 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 33 transitions, 118 flow [2021-10-15 20:25:34,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-15 20:25:34,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-10-15 20:25:34,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 198 transitions. [2021-10-15 20:25:34,984 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.717391304347826 [2021-10-15 20:25:34,984 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 198 transitions. [2021-10-15 20:25:34,984 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 198 transitions. [2021-10-15 20:25:34,984 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:25:34,985 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 198 transitions. [2021-10-15 20:25:34,985 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 49.5) internal successors, (198), 4 states have internal predecessors, (198), 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 20:25:34,986 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 69.0) internal successors, (345), 5 states have internal predecessors, (345), 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 20:25:34,986 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 69.0) internal successors, (345), 5 states have internal predecessors, (345), 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 20:25:34,987 INFO L186 Difference]: Start difference. First operand has 62 places, 45 transitions, 124 flow. Second operand 4 states and 198 transitions. [2021-10-15 20:25:34,987 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 33 transitions, 118 flow [2021-10-15 20:25:34,987 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 33 transitions, 102 flow, removed 0 selfloop flow, removed 5 redundant places. [2021-10-15 20:25:34,988 INFO L242 Difference]: Finished difference. Result has 44 places, 0 transitions, 0 flow [2021-10-15 20:25:34,988 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=69, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=44, PETRI_TRANSITIONS=0} [2021-10-15 20:25:34,989 INFO L334 CegarLoopForPetriNet]: 43 programPoint places, 1 predicate places. [2021-10-15 20:25:34,989 INFO L470 AbstractCegarLoop]: Abstraction has has 44 places, 0 transitions, 0 flow [2021-10-15 20:25:34,989 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 48.75) internal successors, (195), 4 states have internal predecessors, (195), 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 20:25:34,992 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-15 20:25:34,993 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION [2021-10-15 20:25:35,015 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77de9fd7-1435-4d19-9352-673075aa775c/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-10-15 20:25:35,211 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77de9fd7-1435-4d19-9352-673075aa775c/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 [2021-10-15 20:25:35,216 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-15 20:25:35,220 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.10 08:25:35 BoogieIcfgContainer [2021-10-15 20:25:35,220 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-15 20:25:35,221 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-15 20:25:35,221 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-15 20:25:35,221 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-15 20:25:35,222 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 08:25:04" (3/4) ... [2021-10-15 20:25:35,225 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-15 20:25:35,243 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 22 nodes and edges [2021-10-15 20:25:35,244 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2021-10-15 20:25:35,245 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-10-15 20:25:35,245 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-15 20:25:35,332 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77de9fd7-1435-4d19-9352-673075aa775c/bin/uautomizer-hJ6jxDFKc3/witness.graphml [2021-10-15 20:25:35,333 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-15 20:25:35,335 INFO L168 Benchmark]: Toolchain (without parser) took 32378.43 ms. Allocated memory was 56.6 MB in the beginning and 86.0 MB in the end (delta: 29.4 MB). Free memory was 34.8 MB in the beginning and 31.0 MB in the end (delta: 3.8 MB). Peak memory consumption was 34.3 MB. Max. memory is 16.1 GB. [2021-10-15 20:25:35,336 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 56.6 MB. Free memory is still 38.0 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-15 20:25:35,337 INFO L168 Benchmark]: CACSL2BoogieTranslator took 392.80 ms. Allocated memory is still 56.6 MB. Free memory was 34.7 MB in the beginning and 39.0 MB in the end (delta: -4.4 MB). Peak memory consumption was 13.8 MB. Max. memory is 16.1 GB. [2021-10-15 20:25:35,338 INFO L168 Benchmark]: Boogie Procedure Inliner took 52.94 ms. Allocated memory is still 56.6 MB. Free memory was 39.0 MB in the beginning and 37.0 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-15 20:25:35,338 INFO L168 Benchmark]: Boogie Preprocessor took 57.26 ms. Allocated memory is still 56.6 MB. Free memory was 37.0 MB in the beginning and 35.3 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-15 20:25:35,339 INFO L168 Benchmark]: RCFGBuilder took 566.16 ms. Allocated memory was 56.6 MB in the beginning and 71.3 MB in the end (delta: 14.7 MB). Free memory was 35.3 MB in the beginning and 48.3 MB in the end (delta: -13.0 MB). Peak memory consumption was 12.2 MB. Max. memory is 16.1 GB. [2021-10-15 20:25:35,339 INFO L168 Benchmark]: TraceAbstraction took 31187.64 ms. Allocated memory was 71.3 MB in the beginning and 86.0 MB in the end (delta: 14.7 MB). Free memory was 48.0 MB in the beginning and 35.7 MB in the end (delta: 12.3 MB). Peak memory consumption was 27.2 MB. Max. memory is 16.1 GB. [2021-10-15 20:25:35,340 INFO L168 Benchmark]: Witness Printer took 111.85 ms. Allocated memory is still 86.0 MB. Free memory was 35.7 MB in the beginning and 31.0 MB in the end (delta: 4.7 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-15 20:25:35,342 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 56.6 MB. Free memory is still 38.0 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 392.80 ms. Allocated memory is still 56.6 MB. Free memory was 34.7 MB in the beginning and 39.0 MB in the end (delta: -4.4 MB). Peak memory consumption was 13.8 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 52.94 ms. Allocated memory is still 56.6 MB. Free memory was 39.0 MB in the beginning and 37.0 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 57.26 ms. Allocated memory is still 56.6 MB. Free memory was 37.0 MB in the beginning and 35.3 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 566.16 ms. Allocated memory was 56.6 MB in the beginning and 71.3 MB in the end (delta: 14.7 MB). Free memory was 35.3 MB in the beginning and 48.3 MB in the end (delta: -13.0 MB). Peak memory consumption was 12.2 MB. Max. memory is 16.1 GB. * TraceAbstraction took 31187.64 ms. Allocated memory was 71.3 MB in the beginning and 86.0 MB in the end (delta: 14.7 MB). Free memory was 48.0 MB in the beginning and 35.7 MB in the end (delta: 12.3 MB). Peak memory consumption was 27.2 MB. Max. memory is 16.1 GB. * Witness Printer took 111.85 ms. Allocated memory is still 86.0 MB. Free memory was 35.7 MB in the beginning and 31.0 MB in the end (delta: 4.7 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: 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: 77]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 83]: 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, 47 locations, 2 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 44.7ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 31101.9ms, OverallIterations: 19, TraceHistogramMax: 1, EmptinessCheckTime: 0.0ms, AutomataDifference: 13548.3ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 96.4ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 274 SDtfs, 1187 SDslu, 927 SDs, 0 SdLazy, 2064 SolverSat, 263 SolverUnsat, 1 SolverUnknown, 0 SolverNotchecked, 7466.2ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1045 GetRequests, 774 SyntacticMatches, 6 SemanticMatches, 265 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 926 ImplicationChecksByTransitivity, 7003.8ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=511occurred in iteration=9, InterpolantAutomatonStates: 211, 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: 250.0ms SsaConstructionTime, 881.9ms SatisfiabilityAnalysisTime, 8962.3ms InterpolantComputationTime, 479 NumberOfCodeBlocks, 479 NumberOfCodeBlocksAsserted, 19 NumberOfCheckSat, 920 ConstructedInterpolants, 31 QuantifiedInterpolants, 3559 SizeOfPredicates, 145 NumberOfNonLiveVariables, 1646 ConjunctsInSsa, 188 ConjunctsInUnsatCore, 38 InterpolantComputations, 38 PerfectInterpolantSequences, 0/0 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 2 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-10-15 20:25:35,404 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77de9fd7-1435-4d19-9352-673075aa775c/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...