./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/weaver/popl20-channel-sum.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version e04fb08f Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf958fc2-8e14-4e53-9add-214ba807969f/bin/uautomizer-tPACEb0tL8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf958fc2-8e14-4e53-9add-214ba807969f/bin/uautomizer-tPACEb0tL8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf958fc2-8e14-4e53-9add-214ba807969f/bin/uautomizer-tPACEb0tL8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf958fc2-8e14-4e53-9add-214ba807969f/bin/uautomizer-tPACEb0tL8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-channel-sum.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf958fc2-8e14-4e53-9add-214ba807969f/bin/uautomizer-tPACEb0tL8/config/svcomp-Overflow-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf958fc2-8e14-4e53-9add-214ba807969f/bin/uautomizer-tPACEb0tL8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! overflow) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash c902137dd689344b33e1214981c74c26e47854ade5db7e5e71980f90fd07d90c --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-e04fb08 [2022-11-16 10:57:06,162 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 10:57:06,164 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 10:57:06,186 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 10:57:06,189 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 10:57:06,195 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 10:57:06,198 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 10:57:06,202 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 10:57:06,204 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 10:57:06,212 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 10:57:06,213 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 10:57:06,214 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 10:57:06,214 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 10:57:06,215 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 10:57:06,216 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 10:57:06,217 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 10:57:06,218 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 10:57:06,219 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 10:57:06,220 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 10:57:06,222 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 10:57:06,228 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 10:57:06,230 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 10:57:06,233 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 10:57:06,234 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 10:57:06,246 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 10:57:06,246 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 10:57:06,247 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 10:57:06,249 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 10:57:06,249 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 10:57:06,250 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 10:57:06,251 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 10:57:06,252 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 10:57:06,254 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 10:57:06,256 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 10:57:06,257 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 10:57:06,257 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 10:57:06,257 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 10:57:06,258 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 10:57:06,258 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 10:57:06,259 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 10:57:06,260 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 10:57:06,260 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf958fc2-8e14-4e53-9add-214ba807969f/bin/uautomizer-tPACEb0tL8/config/svcomp-Overflow-32bit-Automizer_Default.epf [2022-11-16 10:57:06,302 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 10:57:06,302 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 10:57:06,302 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 10:57:06,306 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 10:57:06,307 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 10:57:06,307 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 10:57:06,308 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-16 10:57:06,308 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-16 10:57:06,308 INFO L138 SettingsManager]: * Use SBE=true [2022-11-16 10:57:06,309 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 10:57:06,310 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-16 10:57:06,310 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-16 10:57:06,310 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 10:57:06,310 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-16 10:57:06,311 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 10:57:06,311 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-16 10:57:06,311 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 10:57:06,311 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-16 10:57:06,311 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2022-11-16 10:57:06,311 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-16 10:57:06,312 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-16 10:57:06,312 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 10:57:06,312 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-16 10:57:06,313 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 10:57:06,313 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-16 10:57:06,313 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 10:57:06,313 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 10:57:06,313 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 10:57:06,314 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 10:57:06,314 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-16 10:57:06,314 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-16 10:57:06,314 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-16 10:57:06,315 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-16 10:57:06,315 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-16 10:57:06,315 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-16 10:57:06,315 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_cf958fc2-8e14-4e53-9add-214ba807969f/bin/uautomizer-tPACEb0tL8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf958fc2-8e14-4e53-9add-214ba807969f/bin/uautomizer-tPACEb0tL8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c902137dd689344b33e1214981c74c26e47854ade5db7e5e71980f90fd07d90c [2022-11-16 10:57:06,669 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 10:57:06,708 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 10:57:06,711 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 10:57:06,712 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 10:57:06,713 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 10:57:06,714 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf958fc2-8e14-4e53-9add-214ba807969f/bin/uautomizer-tPACEb0tL8/../../sv-benchmarks/c/weaver/popl20-channel-sum.wvr.c [2022-11-16 10:57:06,789 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf958fc2-8e14-4e53-9add-214ba807969f/bin/uautomizer-tPACEb0tL8/data/85e7f48df/6b1032b00ad34c0b9657c170290cbf6d/FLAG773dbfc48 [2022-11-16 10:57:07,359 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 10:57:07,360 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf958fc2-8e14-4e53-9add-214ba807969f/sv-benchmarks/c/weaver/popl20-channel-sum.wvr.c [2022-11-16 10:57:07,368 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf958fc2-8e14-4e53-9add-214ba807969f/bin/uautomizer-tPACEb0tL8/data/85e7f48df/6b1032b00ad34c0b9657c170290cbf6d/FLAG773dbfc48 [2022-11-16 10:57:07,696 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf958fc2-8e14-4e53-9add-214ba807969f/bin/uautomizer-tPACEb0tL8/data/85e7f48df/6b1032b00ad34c0b9657c170290cbf6d [2022-11-16 10:57:07,699 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 10:57:07,700 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 10:57:07,711 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 10:57:07,711 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 10:57:07,715 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 10:57:07,716 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 10:57:07" (1/1) ... [2022-11-16 10:57:07,717 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7a88af27 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 10:57:07, skipping insertion in model container [2022-11-16 10:57:07,718 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 10:57:07" (1/1) ... [2022-11-16 10:57:07,725 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 10:57:07,751 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 10:57:08,015 WARN L229 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_cf958fc2-8e14-4e53-9add-214ba807969f/sv-benchmarks/c/weaver/popl20-channel-sum.wvr.c[2947,2960] [2022-11-16 10:57:08,025 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 10:57:08,039 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 10:57:08,060 WARN L229 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_cf958fc2-8e14-4e53-9add-214ba807969f/sv-benchmarks/c/weaver/popl20-channel-sum.wvr.c[2947,2960] [2022-11-16 10:57:08,063 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 10:57:08,076 INFO L208 MainTranslator]: Completed translation [2022-11-16 10:57:08,076 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 10:57:08 WrapperNode [2022-11-16 10:57:08,076 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 10:57:08,077 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 10:57:08,077 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 10:57:08,077 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 10:57:08,085 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 10:57:08" (1/1) ... [2022-11-16 10:57:08,104 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 10:57:08" (1/1) ... [2022-11-16 10:57:08,129 INFO L138 Inliner]: procedures = 24, calls = 45, calls flagged for inlining = 10, calls inlined = 10, statements flattened = 161 [2022-11-16 10:57:08,129 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 10:57:08,130 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 10:57:08,130 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 10:57:08,131 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 10:57:08,140 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 10:57:08" (1/1) ... [2022-11-16 10:57:08,141 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 10:57:08" (1/1) ... [2022-11-16 10:57:08,144 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 10:57:08" (1/1) ... [2022-11-16 10:57:08,144 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 10:57:08" (1/1) ... [2022-11-16 10:57:08,151 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 10:57:08" (1/1) ... [2022-11-16 10:57:08,155 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 10:57:08" (1/1) ... [2022-11-16 10:57:08,163 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 10:57:08" (1/1) ... [2022-11-16 10:57:08,168 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 10:57:08" (1/1) ... [2022-11-16 10:57:08,171 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 10:57:08,175 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 10:57:08,175 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 10:57:08,175 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 10:57:08,176 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 10:57:08" (1/1) ... [2022-11-16 10:57:08,187 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 10:57:08,198 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf958fc2-8e14-4e53-9add-214ba807969f/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 10:57:08,214 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf958fc2-8e14-4e53-9add-214ba807969f/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-16 10:57:08,223 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf958fc2-8e14-4e53-9add-214ba807969f/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-16 10:57:08,250 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-16 10:57:08,250 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-16 10:57:08,251 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-16 10:57:08,251 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-16 10:57:08,251 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-16 10:57:08,251 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-16 10:57:08,251 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-16 10:57:08,252 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-16 10:57:08,252 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-16 10:57:08,252 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-16 10:57:08,252 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-16 10:57:08,252 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 10:57:08,253 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 10:57:08,253 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-16 10:57:08,253 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-16 10:57:08,255 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-16 10:57:08,397 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 10:57:08,399 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 10:57:08,821 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 10:57:08,957 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 10:57:08,957 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-16 10:57:08,960 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 10:57:08 BoogieIcfgContainer [2022-11-16 10:57:08,960 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 10:57:08,963 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-16 10:57:08,963 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-16 10:57:08,967 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-16 10:57:08,968 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 10:57:07" (1/3) ... [2022-11-16 10:57:08,969 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39039868 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 10:57:08, skipping insertion in model container [2022-11-16 10:57:08,969 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 10:57:08" (2/3) ... [2022-11-16 10:57:08,969 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39039868 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 10:57:08, skipping insertion in model container [2022-11-16 10:57:08,970 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 10:57:08" (3/3) ... [2022-11-16 10:57:08,971 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-channel-sum.wvr.c [2022-11-16 10:57:08,981 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-16 10:57:08,994 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-16 10:57:08,994 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2022-11-16 10:57:08,994 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-16 10:57:09,121 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-16 10:57:09,188 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 153 places, 157 transitions, 330 flow [2022-11-16 10:57:09,330 INFO L130 PetriNetUnfolder]: 11/155 cut-off events. [2022-11-16 10:57:09,331 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-16 10:57:09,337 INFO L83 FinitePrefix]: Finished finitePrefix Result has 164 conditions, 155 events. 11/155 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 182 event pairs, 0 based on Foata normal form. 0/134 useless extension candidates. Maximal degree in co-relation 111. Up to 2 conditions per place. [2022-11-16 10:57:09,338 INFO L82 GeneralOperation]: Start removeDead. Operand has 153 places, 157 transitions, 330 flow [2022-11-16 10:57:09,349 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 133 places, 136 transitions, 281 flow [2022-11-16 10:57:09,369 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 10:57:09,380 INFO L357 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, mAutomataTypeConcurrency=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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@52a2500a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 10:57:09,380 INFO L358 AbstractCegarLoop]: Starting to check reachability of 20 error locations. [2022-11-16 10:57:09,434 INFO L130 PetriNetUnfolder]: 3/64 cut-off events. [2022-11-16 10:57:09,434 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-16 10:57:09,435 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 10:57:09,436 INFO L209 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 10:57:09,437 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-16 10:57:09,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 10:57:09,443 INFO L85 PathProgramCache]: Analyzing trace with hash 1057843645, now seen corresponding path program 1 times [2022-11-16 10:57:09,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 10:57:09,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029272611] [2022-11-16 10:57:09,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 10:57:09,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 10:57:09,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 10:57:09,954 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 10:57:09,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 10:57:09,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029272611] [2022-11-16 10:57:09,956 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029272611] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 10:57:09,956 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 10:57:09,956 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 10:57:09,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317040763] [2022-11-16 10:57:09,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 10:57:09,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 10:57:09,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 10:57:10,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 10:57:10,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 10:57:10,008 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 124 out of 157 [2022-11-16 10:57:10,013 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 136 transitions, 281 flow. Second operand has 4 states, 4 states have (on average 125.5) internal successors, (502), 4 states have internal predecessors, (502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:57:10,013 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 10:57:10,014 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 124 of 157 [2022-11-16 10:57:10,015 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 10:57:10,239 INFO L130 PetriNetUnfolder]: 27/270 cut-off events. [2022-11-16 10:57:10,239 INFO L131 PetriNetUnfolder]: For 58/58 co-relation queries the response was YES. [2022-11-16 10:57:10,241 INFO L83 FinitePrefix]: Finished finitePrefix Result has 380 conditions, 270 events. 27/270 cut-off events. For 58/58 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 962 event pairs, 16 based on Foata normal form. 46/276 useless extension candidates. Maximal degree in co-relation 182. Up to 43 conditions per place. [2022-11-16 10:57:10,244 INFO L137 encePairwiseOnDemand]: 145/157 looper letters, 40 selfloop transitions, 4 changer transitions 2/150 dead transitions. [2022-11-16 10:57:10,244 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 150 transitions, 406 flow [2022-11-16 10:57:10,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 10:57:10,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-16 10:57:10,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 676 transitions. [2022-11-16 10:57:10,267 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8611464968152867 [2022-11-16 10:57:10,268 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 676 transitions. [2022-11-16 10:57:10,269 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 676 transitions. [2022-11-16 10:57:10,272 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 10:57:10,275 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 676 transitions. [2022-11-16 10:57:10,280 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 135.2) internal successors, (676), 5 states have internal predecessors, (676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:57:10,287 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 157.0) internal successors, (942), 6 states have internal predecessors, (942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:57:10,288 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 157.0) internal successors, (942), 6 states have internal predecessors, (942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:57:10,290 INFO L175 Difference]: Start difference. First operand has 133 places, 136 transitions, 281 flow. Second operand 5 states and 676 transitions. [2022-11-16 10:57:10,291 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 150 transitions, 406 flow [2022-11-16 10:57:10,295 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 150 transitions, 396 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-11-16 10:57:10,298 INFO L231 Difference]: Finished difference. Result has 137 places, 131 transitions, 290 flow [2022-11-16 10:57:10,301 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=264, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=290, PETRI_PLACES=137, PETRI_TRANSITIONS=131} [2022-11-16 10:57:10,304 INFO L288 CegarLoopForPetriNet]: 133 programPoint places, 4 predicate places. [2022-11-16 10:57:10,304 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 131 transitions, 290 flow [2022-11-16 10:57:10,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 125.5) internal successors, (502), 4 states have internal predecessors, (502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:57:10,305 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 10:57:10,305 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 10:57:10,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-16 10:57:10,306 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-16 10:57:10,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 10:57:10,306 INFO L85 PathProgramCache]: Analyzing trace with hash 535925059, now seen corresponding path program 1 times [2022-11-16 10:57:10,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 10:57:10,307 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654716864] [2022-11-16 10:57:10,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 10:57:10,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 10:57:10,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 10:57:10,522 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 10:57:10,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 10:57:10,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654716864] [2022-11-16 10:57:10,523 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654716864] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 10:57:10,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1626691525] [2022-11-16 10:57:10,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 10:57:10,524 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 10:57:10,524 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf958fc2-8e14-4e53-9add-214ba807969f/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 10:57:10,527 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf958fc2-8e14-4e53-9add-214ba807969f/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 10:57:10,543 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf958fc2-8e14-4e53-9add-214ba807969f/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-16 10:57:10,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 10:57:10,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-16 10:57:10,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 10:57:10,815 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 10:57:10,815 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 10:57:10,924 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 10:57:10,925 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1626691525] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 10:57:10,925 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 10:57:10,925 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2022-11-16 10:57:10,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924010665] [2022-11-16 10:57:10,926 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 10:57:10,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-16 10:57:10,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 10:57:10,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-16 10:57:10,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-11-16 10:57:10,931 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 124 out of 157 [2022-11-16 10:57:10,933 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 131 transitions, 290 flow. Second operand has 12 states, 12 states have (on average 126.66666666666667) internal successors, (1520), 12 states have internal predecessors, (1520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:57:10,933 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 10:57:10,933 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 124 of 157 [2022-11-16 10:57:10,933 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 10:57:11,311 INFO L130 PetriNetUnfolder]: 66/597 cut-off events. [2022-11-16 10:57:11,312 INFO L131 PetriNetUnfolder]: For 56/56 co-relation queries the response was YES. [2022-11-16 10:57:11,315 INFO L83 FinitePrefix]: Finished finitePrefix Result has 837 conditions, 597 events. 66/597 cut-off events. For 56/56 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 3202 event pairs, 40 based on Foata normal form. 3/510 useless extension candidates. Maximal degree in co-relation 624. Up to 45 conditions per place. [2022-11-16 10:57:11,318 INFO L137 encePairwiseOnDemand]: 150/157 looper letters, 88 selfloop transitions, 18 changer transitions 0/210 dead transitions. [2022-11-16 10:57:11,318 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 210 transitions, 698 flow [2022-11-16 10:57:11,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-16 10:57:11,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-11-16 10:57:11,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2341 transitions. [2022-11-16 10:57:11,324 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8283793347487615 [2022-11-16 10:57:11,324 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2341 transitions. [2022-11-16 10:57:11,325 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2341 transitions. [2022-11-16 10:57:11,326 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 10:57:11,327 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2341 transitions. [2022-11-16 10:57:11,332 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 130.05555555555554) internal successors, (2341), 18 states have internal predecessors, (2341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:57:11,339 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 157.0) internal successors, (2983), 19 states have internal predecessors, (2983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:57:11,341 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 157.0) internal successors, (2983), 19 states have internal predecessors, (2983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:57:11,341 INFO L175 Difference]: Start difference. First operand has 137 places, 131 transitions, 290 flow. Second operand 18 states and 2341 transitions. [2022-11-16 10:57:11,341 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 210 transitions, 698 flow [2022-11-16 10:57:11,344 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 210 transitions, 696 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-16 10:57:11,347 INFO L231 Difference]: Finished difference. Result has 155 places, 143 transitions, 394 flow [2022-11-16 10:57:11,347 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=288, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=394, PETRI_PLACES=155, PETRI_TRANSITIONS=143} [2022-11-16 10:57:11,348 INFO L288 CegarLoopForPetriNet]: 133 programPoint places, 22 predicate places. [2022-11-16 10:57:11,348 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 143 transitions, 394 flow [2022-11-16 10:57:11,350 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 126.66666666666667) internal successors, (1520), 12 states have internal predecessors, (1520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:57:11,350 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 10:57:11,350 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 10:57:11,357 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf958fc2-8e14-4e53-9add-214ba807969f/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-16 10:57:11,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf958fc2-8e14-4e53-9add-214ba807969f/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 10:57:11,556 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-16 10:57:11,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 10:57:11,557 INFO L85 PathProgramCache]: Analyzing trace with hash -566192012, now seen corresponding path program 1 times [2022-11-16 10:57:11,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 10:57:11,557 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19012739] [2022-11-16 10:57:11,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 10:57:11,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 10:57:11,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 10:57:11,696 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 10:57:11,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 10:57:11,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19012739] [2022-11-16 10:57:11,697 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [19012739] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 10:57:11,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [320894147] [2022-11-16 10:57:11,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 10:57:11,697 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 10:57:11,697 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf958fc2-8e14-4e53-9add-214ba807969f/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 10:57:11,699 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf958fc2-8e14-4e53-9add-214ba807969f/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 10:57:11,702 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf958fc2-8e14-4e53-9add-214ba807969f/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-16 10:57:11,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 10:57:11,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-16 10:57:11,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 10:57:11,877 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 10:57:11,877 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 10:57:11,877 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [320894147] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 10:57:11,878 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 10:57:11,878 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2022-11-16 10:57:11,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419422492] [2022-11-16 10:57:11,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 10:57:11,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 10:57:11,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 10:57:11,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 10:57:11,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-16 10:57:11,883 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 124 out of 157 [2022-11-16 10:57:11,884 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 143 transitions, 394 flow. Second operand has 6 states, 6 states have (on average 126.33333333333333) internal successors, (758), 6 states have internal predecessors, (758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:57:11,884 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 10:57:11,884 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 124 of 157 [2022-11-16 10:57:11,884 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 10:57:12,092 INFO L130 PetriNetUnfolder]: 66/593 cut-off events. [2022-11-16 10:57:12,092 INFO L131 PetriNetUnfolder]: For 92/92 co-relation queries the response was YES. [2022-11-16 10:57:12,094 INFO L83 FinitePrefix]: Finished finitePrefix Result has 855 conditions, 593 events. 66/593 cut-off events. For 92/92 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 3174 event pairs, 40 based on Foata normal form. 4/507 useless extension candidates. Maximal degree in co-relation 668. Up to 136 conditions per place. [2022-11-16 10:57:12,097 INFO L137 encePairwiseOnDemand]: 152/157 looper letters, 41 selfloop transitions, 11 changer transitions 0/156 dead transitions. [2022-11-16 10:57:12,097 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 156 transitions, 511 flow [2022-11-16 10:57:12,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 10:57:12,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-16 10:57:12,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 912 transitions. [2022-11-16 10:57:12,100 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8298453139217471 [2022-11-16 10:57:12,100 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 912 transitions. [2022-11-16 10:57:12,100 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 912 transitions. [2022-11-16 10:57:12,101 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 10:57:12,101 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 912 transitions. [2022-11-16 10:57:12,103 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 130.28571428571428) internal successors, (912), 7 states have internal predecessors, (912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:57:12,106 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 157.0) internal successors, (1256), 8 states have internal predecessors, (1256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:57:12,107 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 157.0) internal successors, (1256), 8 states have internal predecessors, (1256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:57:12,107 INFO L175 Difference]: Start difference. First operand has 155 places, 143 transitions, 394 flow. Second operand 7 states and 912 transitions. [2022-11-16 10:57:12,107 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 156 transitions, 511 flow [2022-11-16 10:57:12,110 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 156 transitions, 479 flow, removed 11 selfloop flow, removed 5 redundant places. [2022-11-16 10:57:12,112 INFO L231 Difference]: Finished difference. Result has 151 places, 139 transitions, 357 flow [2022-11-16 10:57:12,113 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=335, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=357, PETRI_PLACES=151, PETRI_TRANSITIONS=139} [2022-11-16 10:57:12,114 INFO L288 CegarLoopForPetriNet]: 133 programPoint places, 18 predicate places. [2022-11-16 10:57:12,114 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 139 transitions, 357 flow [2022-11-16 10:57:12,114 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 126.33333333333333) internal successors, (758), 6 states have internal predecessors, (758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:57:12,115 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 10:57:12,115 INFO L209 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, 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, 1] [2022-11-16 10:57:12,131 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf958fc2-8e14-4e53-9add-214ba807969f/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-16 10:57:12,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf958fc2-8e14-4e53-9add-214ba807969f/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 10:57:12,321 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-16 10:57:12,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 10:57:12,322 INFO L85 PathProgramCache]: Analyzing trace with hash -692072019, now seen corresponding path program 1 times [2022-11-16 10:57:12,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 10:57:12,322 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579871193] [2022-11-16 10:57:12,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 10:57:12,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 10:57:12,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 10:57:12,554 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 10:57:12,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 10:57:12,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579871193] [2022-11-16 10:57:12,555 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579871193] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 10:57:12,555 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 10:57:12,555 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 10:57:12,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852534192] [2022-11-16 10:57:12,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 10:57:12,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 10:57:12,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 10:57:12,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 10:57:12,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 10:57:12,558 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 124 out of 157 [2022-11-16 10:57:12,559 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 139 transitions, 357 flow. Second operand has 4 states, 4 states have (on average 126.5) internal successors, (506), 4 states have internal predecessors, (506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:57:12,559 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 10:57:12,559 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 124 of 157 [2022-11-16 10:57:12,559 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 10:57:13,043 INFO L130 PetriNetUnfolder]: 606/2113 cut-off events. [2022-11-16 10:57:13,043 INFO L131 PetriNetUnfolder]: For 102/102 co-relation queries the response was YES. [2022-11-16 10:57:13,049 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3381 conditions, 2113 events. 606/2113 cut-off events. For 102/102 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 14631 event pairs, 210 based on Foata normal form. 0/1538 useless extension candidates. Maximal degree in co-relation 2696. Up to 609 conditions per place. [2022-11-16 10:57:13,059 INFO L137 encePairwiseOnDemand]: 151/157 looper letters, 49 selfloop transitions, 7 changer transitions 0/171 dead transitions. [2022-11-16 10:57:13,059 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 171 transitions, 536 flow [2022-11-16 10:57:13,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 10:57:13,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-16 10:57:13,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 678 transitions. [2022-11-16 10:57:13,062 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8636942675159236 [2022-11-16 10:57:13,062 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 678 transitions. [2022-11-16 10:57:13,062 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 678 transitions. [2022-11-16 10:57:13,063 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 10:57:13,063 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 678 transitions. [2022-11-16 10:57:13,065 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 135.6) internal successors, (678), 5 states have internal predecessors, (678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:57:13,066 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 157.0) internal successors, (942), 6 states have internal predecessors, (942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:57:13,067 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 157.0) internal successors, (942), 6 states have internal predecessors, (942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:57:13,067 INFO L175 Difference]: Start difference. First operand has 151 places, 139 transitions, 357 flow. Second operand 5 states and 678 transitions. [2022-11-16 10:57:13,067 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 171 transitions, 536 flow [2022-11-16 10:57:13,071 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 171 transitions, 522 flow, removed 0 selfloop flow, removed 5 redundant places. [2022-11-16 10:57:13,073 INFO L231 Difference]: Finished difference. Result has 154 places, 145 transitions, 399 flow [2022-11-16 10:57:13,074 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=343, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=399, PETRI_PLACES=154, PETRI_TRANSITIONS=145} [2022-11-16 10:57:13,076 INFO L288 CegarLoopForPetriNet]: 133 programPoint places, 21 predicate places. [2022-11-16 10:57:13,076 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 145 transitions, 399 flow [2022-11-16 10:57:13,076 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 126.5) internal successors, (506), 4 states have internal predecessors, (506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:57:13,077 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 10:57:13,077 INFO L209 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, 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, 1] [2022-11-16 10:57:13,077 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-16 10:57:13,077 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-16 10:57:13,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 10:57:13,078 INFO L85 PathProgramCache]: Analyzing trace with hash 880097675, now seen corresponding path program 1 times [2022-11-16 10:57:13,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 10:57:13,078 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172631924] [2022-11-16 10:57:13,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 10:57:13,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 10:57:13,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 10:57:13,250 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 10:57:13,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 10:57:13,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172631924] [2022-11-16 10:57:13,251 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1172631924] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 10:57:13,251 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 10:57:13,251 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 10:57:13,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645678152] [2022-11-16 10:57:13,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 10:57:13,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 10:57:13,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 10:57:13,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 10:57:13,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-16 10:57:13,254 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 123 out of 157 [2022-11-16 10:57:13,254 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 145 transitions, 399 flow. Second operand has 5 states, 5 states have (on average 125.4) internal successors, (627), 5 states have internal predecessors, (627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:57:13,255 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 10:57:13,255 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 123 of 157 [2022-11-16 10:57:13,255 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 10:57:13,793 INFO L130 PetriNetUnfolder]: 561/2723 cut-off events. [2022-11-16 10:57:13,794 INFO L131 PetriNetUnfolder]: For 798/798 co-relation queries the response was YES. [2022-11-16 10:57:13,803 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4577 conditions, 2723 events. 561/2723 cut-off events. For 798/798 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 20754 event pairs, 185 based on Foata normal form. 0/2398 useless extension candidates. Maximal degree in co-relation 3652. Up to 624 conditions per place. [2022-11-16 10:57:13,814 INFO L137 encePairwiseOnDemand]: 150/157 looper letters, 35 selfloop transitions, 5 changer transitions 0/155 dead transitions. [2022-11-16 10:57:13,815 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 155 transitions, 508 flow [2022-11-16 10:57:13,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 10:57:13,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-16 10:57:13,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 654 transitions. [2022-11-16 10:57:13,819 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8331210191082803 [2022-11-16 10:57:13,819 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 654 transitions. [2022-11-16 10:57:13,819 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 654 transitions. [2022-11-16 10:57:13,820 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 10:57:13,820 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 654 transitions. [2022-11-16 10:57:13,821 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 130.8) internal successors, (654), 5 states have internal predecessors, (654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:57:13,823 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 157.0) internal successors, (942), 6 states have internal predecessors, (942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:57:13,824 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 157.0) internal successors, (942), 6 states have internal predecessors, (942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:57:13,824 INFO L175 Difference]: Start difference. First operand has 154 places, 145 transitions, 399 flow. Second operand 5 states and 654 transitions. [2022-11-16 10:57:13,824 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 155 transitions, 508 flow [2022-11-16 10:57:13,827 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 155 transitions, 508 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-16 10:57:13,830 INFO L231 Difference]: Finished difference. Result has 157 places, 144 transitions, 413 flow [2022-11-16 10:57:13,830 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=395, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=413, PETRI_PLACES=157, PETRI_TRANSITIONS=144} [2022-11-16 10:57:13,834 INFO L288 CegarLoopForPetriNet]: 133 programPoint places, 24 predicate places. [2022-11-16 10:57:13,835 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 144 transitions, 413 flow [2022-11-16 10:57:13,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 125.4) internal successors, (627), 5 states have internal predecessors, (627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:57:13,835 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 10:57:13,835 INFO L209 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, 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, 1] [2022-11-16 10:57:13,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-16 10:57:13,836 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-16 10:57:13,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 10:57:13,836 INFO L85 PathProgramCache]: Analyzing trace with hash 880097674, now seen corresponding path program 1 times [2022-11-16 10:57:13,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 10:57:13,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739124264] [2022-11-16 10:57:13,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 10:57:13,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 10:57:13,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 10:57:14,076 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 10:57:14,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 10:57:14,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739124264] [2022-11-16 10:57:14,076 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1739124264] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 10:57:14,076 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 10:57:14,077 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-16 10:57:14,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690529660] [2022-11-16 10:57:14,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 10:57:14,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 10:57:14,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 10:57:14,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 10:57:14,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-16 10:57:14,084 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 157 [2022-11-16 10:57:14,085 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 144 transitions, 413 flow. Second operand has 7 states, 7 states have (on average 119.42857142857143) internal successors, (836), 7 states have internal predecessors, (836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:57:14,085 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 10:57:14,086 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 157 [2022-11-16 10:57:14,086 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 10:57:14,589 INFO L130 PetriNetUnfolder]: 310/2095 cut-off events. [2022-11-16 10:57:14,590 INFO L131 PetriNetUnfolder]: For 551/551 co-relation queries the response was YES. [2022-11-16 10:57:14,597 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3350 conditions, 2095 events. 310/2095 cut-off events. For 551/551 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 15655 event pairs, 169 based on Foata normal form. 2/1834 useless extension candidates. Maximal degree in co-relation 3192. Up to 581 conditions per place. [2022-11-16 10:57:14,606 INFO L137 encePairwiseOnDemand]: 149/157 looper letters, 38 selfloop transitions, 6 changer transitions 5/151 dead transitions. [2022-11-16 10:57:14,606 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 151 transitions, 533 flow [2022-11-16 10:57:14,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 10:57:14,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-16 10:57:14,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 858 transitions. [2022-11-16 10:57:14,610 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7807097361237488 [2022-11-16 10:57:14,610 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 858 transitions. [2022-11-16 10:57:14,610 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 858 transitions. [2022-11-16 10:57:14,611 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 10:57:14,611 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 858 transitions. [2022-11-16 10:57:14,614 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 122.57142857142857) internal successors, (858), 7 states have internal predecessors, (858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:57:14,616 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 157.0) internal successors, (1256), 8 states have internal predecessors, (1256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:57:14,617 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 157.0) internal successors, (1256), 8 states have internal predecessors, (1256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:57:14,617 INFO L175 Difference]: Start difference. First operand has 157 places, 144 transitions, 413 flow. Second operand 7 states and 858 transitions. [2022-11-16 10:57:14,617 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 151 transitions, 533 flow [2022-11-16 10:57:14,620 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 151 transitions, 527 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-11-16 10:57:14,623 INFO L231 Difference]: Finished difference. Result has 162 places, 144 transitions, 425 flow [2022-11-16 10:57:14,624 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=407, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=425, PETRI_PLACES=162, PETRI_TRANSITIONS=144} [2022-11-16 10:57:14,624 INFO L288 CegarLoopForPetriNet]: 133 programPoint places, 29 predicate places. [2022-11-16 10:57:14,625 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 144 transitions, 425 flow [2022-11-16 10:57:14,625 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 119.42857142857143) internal successors, (836), 7 states have internal predecessors, (836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:57:14,625 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 10:57:14,626 INFO L209 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 10:57:14,626 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-16 10:57:14,626 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-16 10:57:14,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 10:57:14,626 INFO L85 PathProgramCache]: Analyzing trace with hash -706720060, now seen corresponding path program 1 times [2022-11-16 10:57:14,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 10:57:14,627 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634098751] [2022-11-16 10:57:14,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 10:57:14,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 10:57:14,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 10:57:15,009 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 10:57:15,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 10:57:15,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634098751] [2022-11-16 10:57:15,010 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634098751] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 10:57:15,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [580547622] [2022-11-16 10:57:15,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 10:57:15,010 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 10:57:15,010 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf958fc2-8e14-4e53-9add-214ba807969f/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 10:57:15,012 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf958fc2-8e14-4e53-9add-214ba807969f/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 10:57:15,035 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf958fc2-8e14-4e53-9add-214ba807969f/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-16 10:57:15,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 10:57:15,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-16 10:57:15,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 10:57:15,301 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 10:57:15,301 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 10:57:15,301 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [580547622] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 10:57:15,301 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 10:57:15,302 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [8] total 11 [2022-11-16 10:57:15,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676325003] [2022-11-16 10:57:15,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 10:57:15,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 10:57:15,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 10:57:15,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 10:57:15,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2022-11-16 10:57:15,304 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 125 out of 157 [2022-11-16 10:57:15,305 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 144 transitions, 425 flow. Second operand has 5 states, 5 states have (on average 127.6) internal successors, (638), 5 states have internal predecessors, (638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:57:15,305 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 10:57:15,305 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 125 of 157 [2022-11-16 10:57:15,305 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 10:57:15,526 INFO L130 PetriNetUnfolder]: 217/985 cut-off events. [2022-11-16 10:57:15,526 INFO L131 PetriNetUnfolder]: For 326/326 co-relation queries the response was YES. [2022-11-16 10:57:15,531 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1846 conditions, 985 events. 217/985 cut-off events. For 326/326 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 5433 event pairs, 16 based on Foata normal form. 88/933 useless extension candidates. Maximal degree in co-relation 1749. Up to 242 conditions per place. [2022-11-16 10:57:15,534 INFO L137 encePairwiseOnDemand]: 147/157 looper letters, 13 selfloop transitions, 10 changer transitions 9/147 dead transitions. [2022-11-16 10:57:15,534 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 147 transitions, 496 flow [2022-11-16 10:57:15,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 10:57:15,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-16 10:57:15,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 775 transitions. [2022-11-16 10:57:15,537 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8227176220806794 [2022-11-16 10:57:15,537 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 775 transitions. [2022-11-16 10:57:15,537 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 775 transitions. [2022-11-16 10:57:15,538 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 10:57:15,538 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 775 transitions. [2022-11-16 10:57:15,541 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 129.16666666666666) internal successors, (775), 6 states have internal predecessors, (775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:57:15,543 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 157.0) internal successors, (1099), 7 states have internal predecessors, (1099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:57:15,544 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 157.0) internal successors, (1099), 7 states have internal predecessors, (1099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:57:15,544 INFO L175 Difference]: Start difference. First operand has 162 places, 144 transitions, 425 flow. Second operand 6 states and 775 transitions. [2022-11-16 10:57:15,544 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 147 transitions, 496 flow [2022-11-16 10:57:15,547 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 147 transitions, 482 flow, removed 1 selfloop flow, removed 6 redundant places. [2022-11-16 10:57:15,549 INFO L231 Difference]: Finished difference. Result has 158 places, 135 transitions, 398 flow [2022-11-16 10:57:15,550 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=407, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=398, PETRI_PLACES=158, PETRI_TRANSITIONS=135} [2022-11-16 10:57:15,550 INFO L288 CegarLoopForPetriNet]: 133 programPoint places, 25 predicate places. [2022-11-16 10:57:15,550 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 135 transitions, 398 flow [2022-11-16 10:57:15,551 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 127.6) internal successors, (638), 5 states have internal predecessors, (638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:57:15,552 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 10:57:15,552 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 10:57:15,567 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf958fc2-8e14-4e53-9add-214ba807969f/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-16 10:57:15,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf958fc2-8e14-4e53-9add-214ba807969f/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-16 10:57:15,763 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-16 10:57:15,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 10:57:15,764 INFO L85 PathProgramCache]: Analyzing trace with hash 811034429, now seen corresponding path program 2 times [2022-11-16 10:57:15,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 10:57:15,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426328410] [2022-11-16 10:57:15,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 10:57:15,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 10:57:15,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 10:57:15,991 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 10:57:15,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 10:57:15,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426328410] [2022-11-16 10:57:15,992 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1426328410] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 10:57:15,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1493154493] [2022-11-16 10:57:15,992 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 10:57:15,992 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 10:57:15,992 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf958fc2-8e14-4e53-9add-214ba807969f/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 10:57:15,993 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf958fc2-8e14-4e53-9add-214ba807969f/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 10:57:16,029 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf958fc2-8e14-4e53-9add-214ba807969f/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-16 10:57:16,106 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 10:57:16,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 10:57:16,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-16 10:57:16,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 10:57:16,327 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-11-16 10:57:16,328 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 10:57:16,507 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-11-16 10:57:16,507 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1493154493] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 10:57:16,507 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 10:57:16,507 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 7] total 17 [2022-11-16 10:57:16,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267727512] [2022-11-16 10:57:16,508 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 10:57:16,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-16 10:57:16,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 10:57:16,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-16 10:57:16,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2022-11-16 10:57:16,512 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 157 [2022-11-16 10:57:16,514 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 135 transitions, 398 flow. Second operand has 18 states, 18 states have (on average 116.61111111111111) internal successors, (2099), 18 states have internal predecessors, (2099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:57:16,515 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 10:57:16,515 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 157 [2022-11-16 10:57:16,515 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 10:57:17,444 INFO L130 PetriNetUnfolder]: 139/1525 cut-off events. [2022-11-16 10:57:17,444 INFO L131 PetriNetUnfolder]: For 490/502 co-relation queries the response was YES. [2022-11-16 10:57:17,451 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2339 conditions, 1525 events. 139/1525 cut-off events. For 490/502 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 9650 event pairs, 36 based on Foata normal form. 2/1287 useless extension candidates. Maximal degree in co-relation 2234. Up to 103 conditions per place. [2022-11-16 10:57:17,457 INFO L137 encePairwiseOnDemand]: 146/157 looper letters, 96 selfloop transitions, 25 changer transitions 0/213 dead transitions. [2022-11-16 10:57:17,457 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 213 transitions, 965 flow [2022-11-16 10:57:17,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-16 10:57:17,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2022-11-16 10:57:17,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 2823 transitions. [2022-11-16 10:57:17,464 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7492038216560509 [2022-11-16 10:57:17,464 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 2823 transitions. [2022-11-16 10:57:17,464 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 2823 transitions. [2022-11-16 10:57:17,466 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 10:57:17,466 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 2823 transitions. [2022-11-16 10:57:17,472 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 117.625) internal successors, (2823), 24 states have internal predecessors, (2823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:57:17,480 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 157.0) internal successors, (3925), 25 states have internal predecessors, (3925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:57:17,482 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 157.0) internal successors, (3925), 25 states have internal predecessors, (3925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:57:17,482 INFO L175 Difference]: Start difference. First operand has 158 places, 135 transitions, 398 flow. Second operand 24 states and 2823 transitions. [2022-11-16 10:57:17,482 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 213 transitions, 965 flow [2022-11-16 10:57:17,485 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 213 transitions, 856 flow, removed 1 selfloop flow, removed 12 redundant places. [2022-11-16 10:57:17,488 INFO L231 Difference]: Finished difference. Result has 165 places, 139 transitions, 428 flow [2022-11-16 10:57:17,489 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=349, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=428, PETRI_PLACES=165, PETRI_TRANSITIONS=139} [2022-11-16 10:57:17,489 INFO L288 CegarLoopForPetriNet]: 133 programPoint places, 32 predicate places. [2022-11-16 10:57:17,490 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 139 transitions, 428 flow [2022-11-16 10:57:17,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 116.61111111111111) internal successors, (2099), 18 states have internal predecessors, (2099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:57:17,491 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 10:57:17,491 INFO L209 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 10:57:17,501 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf958fc2-8e14-4e53-9add-214ba807969f/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-16 10:57:17,697 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf958fc2-8e14-4e53-9add-214ba807969f/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-16 10:57:17,697 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-16 10:57:17,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 10:57:17,697 INFO L85 PathProgramCache]: Analyzing trace with hash -1422573891, now seen corresponding path program 1 times [2022-11-16 10:57:17,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 10:57:17,698 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114700121] [2022-11-16 10:57:17,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 10:57:17,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 10:57:17,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 10:57:17,806 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 10:57:17,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 10:57:17,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114700121] [2022-11-16 10:57:17,806 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114700121] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 10:57:17,807 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 10:57:17,807 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 10:57:17,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581951489] [2022-11-16 10:57:17,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 10:57:17,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 10:57:17,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 10:57:17,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 10:57:17,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-16 10:57:17,809 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 121 out of 157 [2022-11-16 10:57:17,810 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 139 transitions, 428 flow. Second operand has 5 states, 5 states have (on average 123.8) internal successors, (619), 5 states have internal predecessors, (619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:57:17,810 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 10:57:17,810 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 121 of 157 [2022-11-16 10:57:17,811 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 10:57:18,283 INFO L130 PetriNetUnfolder]: 577/2047 cut-off events. [2022-11-16 10:57:18,284 INFO L131 PetriNetUnfolder]: For 719/719 co-relation queries the response was YES. [2022-11-16 10:57:18,292 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3854 conditions, 2047 events. 577/2047 cut-off events. For 719/719 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 12524 event pairs, 54 based on Foata normal form. 0/1849 useless extension candidates. Maximal degree in co-relation 1895. Up to 339 conditions per place. [2022-11-16 10:57:18,302 INFO L137 encePairwiseOnDemand]: 147/157 looper letters, 40 selfloop transitions, 9 changer transitions 0/163 dead transitions. [2022-11-16 10:57:18,302 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 163 transitions, 598 flow [2022-11-16 10:57:18,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 10:57:18,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-16 10:57:18,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 897 transitions. [2022-11-16 10:57:18,305 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.816196542311192 [2022-11-16 10:57:18,305 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 897 transitions. [2022-11-16 10:57:18,306 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 897 transitions. [2022-11-16 10:57:18,306 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 10:57:18,307 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 897 transitions. [2022-11-16 10:57:18,309 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 128.14285714285714) internal successors, (897), 7 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) [2022-11-16 10:57:18,311 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 157.0) internal successors, (1256), 8 states have internal predecessors, (1256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:57:18,312 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 157.0) internal successors, (1256), 8 states have internal predecessors, (1256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:57:18,312 INFO L175 Difference]: Start difference. First operand has 165 places, 139 transitions, 428 flow. Second operand 7 states and 897 transitions. [2022-11-16 10:57:18,312 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 163 transitions, 598 flow [2022-11-16 10:57:18,314 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 163 transitions, 540 flow, removed 2 selfloop flow, removed 17 redundant places. [2022-11-16 10:57:18,317 INFO L231 Difference]: Finished difference. Result has 157 places, 141 transitions, 408 flow [2022-11-16 10:57:18,317 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=370, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=408, PETRI_PLACES=157, PETRI_TRANSITIONS=141} [2022-11-16 10:57:18,318 INFO L288 CegarLoopForPetriNet]: 133 programPoint places, 24 predicate places. [2022-11-16 10:57:18,318 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 141 transitions, 408 flow [2022-11-16 10:57:18,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 123.8) internal successors, (619), 5 states have internal predecessors, (619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:57:18,319 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 10:57:18,319 INFO L209 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 10:57:18,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-16 10:57:18,319 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-16 10:57:18,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 10:57:18,320 INFO L85 PathProgramCache]: Analyzing trace with hash -1150117167, now seen corresponding path program 1 times [2022-11-16 10:57:18,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 10:57:18,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116235502] [2022-11-16 10:57:18,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 10:57:18,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 10:57:18,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 10:57:18,424 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 10:57:18,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 10:57:18,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116235502] [2022-11-16 10:57:18,424 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1116235502] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 10:57:18,424 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 10:57:18,425 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 10:57:18,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724269377] [2022-11-16 10:57:18,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 10:57:18,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 10:57:18,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 10:57:18,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 10:57:18,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-16 10:57:18,427 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 157 [2022-11-16 10:57:18,428 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 141 transitions, 408 flow. Second operand has 5 states, 5 states have (on average 122.4) internal successors, (612), 5 states have internal predecessors, (612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:57:18,428 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 10:57:18,428 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 157 [2022-11-16 10:57:18,429 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 10:57:18,823 INFO L130 PetriNetUnfolder]: 517/1939 cut-off events. [2022-11-16 10:57:18,823 INFO L131 PetriNetUnfolder]: For 786/786 co-relation queries the response was YES. [2022-11-16 10:57:18,830 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3822 conditions, 1939 events. 517/1939 cut-off events. For 786/786 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 11755 event pairs, 126 based on Foata normal form. 0/1813 useless extension candidates. Maximal degree in co-relation 1821. Up to 478 conditions per place. [2022-11-16 10:57:18,839 INFO L137 encePairwiseOnDemand]: 151/157 looper letters, 27 selfloop transitions, 6 changer transitions 0/145 dead transitions. [2022-11-16 10:57:18,839 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 145 transitions, 490 flow [2022-11-16 10:57:18,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 10:57:18,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-16 10:57:18,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 624 transitions. [2022-11-16 10:57:18,842 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7949044585987262 [2022-11-16 10:57:18,842 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 624 transitions. [2022-11-16 10:57:18,842 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 624 transitions. [2022-11-16 10:57:18,843 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 10:57:18,843 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 624 transitions. [2022-11-16 10:57:18,844 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 124.8) internal successors, (624), 5 states have internal predecessors, (624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:57:18,846 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 157.0) internal successors, (942), 6 states have internal predecessors, (942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:57:18,847 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 157.0) internal successors, (942), 6 states have internal predecessors, (942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:57:18,847 INFO L175 Difference]: Start difference. First operand has 157 places, 141 transitions, 408 flow. Second operand 5 states and 624 transitions. [2022-11-16 10:57:18,847 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 145 transitions, 490 flow [2022-11-16 10:57:18,849 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 145 transitions, 478 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-11-16 10:57:18,851 INFO L231 Difference]: Finished difference. Result has 156 places, 140 transitions, 406 flow [2022-11-16 10:57:18,852 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=394, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=406, PETRI_PLACES=156, PETRI_TRANSITIONS=140} [2022-11-16 10:57:18,853 INFO L288 CegarLoopForPetriNet]: 133 programPoint places, 23 predicate places. [2022-11-16 10:57:18,854 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 140 transitions, 406 flow [2022-11-16 10:57:18,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 122.4) internal successors, (612), 5 states have internal predecessors, (612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:57:18,854 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 10:57:18,854 INFO L209 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, 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, 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] [2022-11-16 10:57:18,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-16 10:57:18,855 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-16 10:57:18,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 10:57:18,855 INFO L85 PathProgramCache]: Analyzing trace with hash 2109056960, now seen corresponding path program 1 times [2022-11-16 10:57:18,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 10:57:18,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932269868] [2022-11-16 10:57:18,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 10:57:18,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 10:57:18,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 10:57:20,701 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 10:57:20,701 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 10:57:20,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932269868] [2022-11-16 10:57:20,702 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932269868] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 10:57:20,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [535109037] [2022-11-16 10:57:20,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 10:57:20,702 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 10:57:20,702 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf958fc2-8e14-4e53-9add-214ba807969f/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 10:57:20,703 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf958fc2-8e14-4e53-9add-214ba807969f/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 10:57:20,731 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf958fc2-8e14-4e53-9add-214ba807969f/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-16 10:57:20,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 10:57:20,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 45 conjunts are in the unsatisfiable core [2022-11-16 10:57:20,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 10:57:20,883 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-16 10:57:20,932 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-16 10:57:20,932 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2022-11-16 10:57:21,246 INFO L321 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2022-11-16 10:57:21,246 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 10:57:21,505 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-16 10:57:22,331 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-11-16 10:57:22,505 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-11-16 10:57:23,190 INFO L321 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-11-16 10:57:23,191 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 10 [2022-11-16 10:57:23,311 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 10:57:23,311 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 10:57:26,705 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 10:57:26,706 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 32 [2022-11-16 10:57:26,719 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 10:57:26,720 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 88 treesize of output 84 [2022-11-16 10:57:26,731 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 56 [2022-11-16 10:57:26,738 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2022-11-16 10:57:28,892 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 10:57:28,893 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [535109037] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 10:57:28,893 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 10:57:28,893 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 24, 25] total 72 [2022-11-16 10:57:28,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706414698] [2022-11-16 10:57:28,893 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 10:57:28,894 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2022-11-16 10:57:28,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 10:57:28,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2022-11-16 10:57:28,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=317, Invalid=4934, Unknown=5, NotChecked=0, Total=5256 [2022-11-16 10:57:28,905 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 157 [2022-11-16 10:57:28,910 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 140 transitions, 406 flow. Second operand has 73 states, 73 states have (on average 68.1917808219178) internal successors, (4978), 73 states have internal predecessors, (4978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:57:28,911 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 10:57:28,911 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 157 [2022-11-16 10:57:28,911 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 10:57:34,394 INFO L130 PetriNetUnfolder]: 2786/5861 cut-off events. [2022-11-16 10:57:34,394 INFO L131 PetriNetUnfolder]: For 2574/2574 co-relation queries the response was YES. [2022-11-16 10:57:34,414 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12967 conditions, 5861 events. 2786/5861 cut-off events. For 2574/2574 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 39800 event pairs, 1364 based on Foata normal form. 0/5505 useless extension candidates. Maximal degree in co-relation 5331. Up to 4092 conditions per place. [2022-11-16 10:57:34,447 INFO L137 encePairwiseOnDemand]: 112/157 looper letters, 99 selfloop transitions, 97 changer transitions 3/249 dead transitions. [2022-11-16 10:57:34,447 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 249 transitions, 1109 flow [2022-11-16 10:57:34,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-11-16 10:57:34,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2022-11-16 10:57:34,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 2821 transitions. [2022-11-16 10:57:34,458 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44920382165605094 [2022-11-16 10:57:34,458 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 2821 transitions. [2022-11-16 10:57:34,459 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 2821 transitions. [2022-11-16 10:57:34,461 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 10:57:34,461 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 2821 transitions. [2022-11-16 10:57:34,483 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 70.525) internal successors, (2821), 40 states have internal predecessors, (2821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:57:34,502 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 157.0) internal successors, (6437), 41 states have internal predecessors, (6437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:57:34,505 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 157.0) internal successors, (6437), 41 states have internal predecessors, (6437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:57:34,505 INFO L175 Difference]: Start difference. First operand has 156 places, 140 transitions, 406 flow. Second operand 40 states and 2821 transitions. [2022-11-16 10:57:34,505 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 249 transitions, 1109 flow [2022-11-16 10:57:34,511 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 249 transitions, 1093 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-11-16 10:57:34,657 INFO L231 Difference]: Finished difference. Result has 207 places, 228 transitions, 1012 flow [2022-11-16 10:57:34,657 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=394, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=1012, PETRI_PLACES=207, PETRI_TRANSITIONS=228} [2022-11-16 10:57:34,658 INFO L288 CegarLoopForPetriNet]: 133 programPoint places, 74 predicate places. [2022-11-16 10:57:34,658 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 228 transitions, 1012 flow [2022-11-16 10:57:34,659 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 68.1917808219178) internal successors, (4978), 73 states have internal predecessors, (4978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:57:34,660 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 10:57:34,660 INFO L209 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, 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, 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] [2022-11-16 10:57:34,667 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf958fc2-8e14-4e53-9add-214ba807969f/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-16 10:57:34,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf958fc2-8e14-4e53-9add-214ba807969f/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 10:57:34,867 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-16 10:57:34,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 10:57:34,867 INFO L85 PathProgramCache]: Analyzing trace with hash -2135456195, now seen corresponding path program 1 times [2022-11-16 10:57:34,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 10:57:34,867 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086252271] [2022-11-16 10:57:34,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 10:57:34,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 10:57:34,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 10:57:34,958 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 10:57:34,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 10:57:34,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086252271] [2022-11-16 10:57:34,958 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1086252271] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 10:57:34,958 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 10:57:34,959 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 10:57:34,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805231860] [2022-11-16 10:57:34,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 10:57:34,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 10:57:34,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 10:57:34,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 10:57:34,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 10:57:34,961 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 157 [2022-11-16 10:57:34,961 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 228 transitions, 1012 flow. Second operand has 3 states, 3 states have (on average 134.33333333333334) internal successors, (403), 3 states have internal predecessors, (403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:57:34,961 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 10:57:34,961 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 157 [2022-11-16 10:57:34,962 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 10:57:35,816 INFO L130 PetriNetUnfolder]: 1200/4369 cut-off events. [2022-11-16 10:57:35,816 INFO L131 PetriNetUnfolder]: For 1946/2562 co-relation queries the response was YES. [2022-11-16 10:57:35,841 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9506 conditions, 4369 events. 1200/4369 cut-off events. For 1946/2562 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 34742 event pairs, 523 based on Foata normal form. 131/4336 useless extension candidates. Maximal degree in co-relation 8771. Up to 1524 conditions per place. [2022-11-16 10:57:35,857 INFO L137 encePairwiseOnDemand]: 154/157 looper letters, 64 selfloop transitions, 2 changer transitions 0/232 dead transitions. [2022-11-16 10:57:35,857 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 232 transitions, 1154 flow [2022-11-16 10:57:35,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 10:57:35,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-16 10:57:35,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 413 transitions. [2022-11-16 10:57:35,862 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8768577494692145 [2022-11-16 10:57:35,862 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 413 transitions. [2022-11-16 10:57:35,863 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 413 transitions. [2022-11-16 10:57:35,863 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 10:57:35,863 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 413 transitions. [2022-11-16 10:57:35,864 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 137.66666666666666) internal successors, (413), 3 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) [2022-11-16 10:57:35,866 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 157.0) internal successors, (628), 4 states have internal predecessors, (628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:57:35,866 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 157.0) internal successors, (628), 4 states have internal predecessors, (628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:57:35,866 INFO L175 Difference]: Start difference. First operand has 207 places, 228 transitions, 1012 flow. Second operand 3 states and 413 transitions. [2022-11-16 10:57:35,866 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 232 transitions, 1154 flow [2022-11-16 10:57:35,884 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 232 transitions, 1078 flow, removed 22 selfloop flow, removed 16 redundant places. [2022-11-16 10:57:35,888 INFO L231 Difference]: Finished difference. Result has 193 places, 228 transitions, 942 flow [2022-11-16 10:57:35,889 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=930, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=227, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=225, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=942, PETRI_PLACES=193, PETRI_TRANSITIONS=228} [2022-11-16 10:57:35,890 INFO L288 CegarLoopForPetriNet]: 133 programPoint places, 60 predicate places. [2022-11-16 10:57:35,890 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 228 transitions, 942 flow [2022-11-16 10:57:35,890 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 134.33333333333334) internal successors, (403), 3 states have internal predecessors, (403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:57:35,890 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 10:57:35,891 INFO L209 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, 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, 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] [2022-11-16 10:57:35,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-16 10:57:35,891 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-16 10:57:35,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 10:57:35,892 INFO L85 PathProgramCache]: Analyzing trace with hash 956256820, now seen corresponding path program 1 times [2022-11-16 10:57:35,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 10:57:35,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014569645] [2022-11-16 10:57:35,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 10:57:35,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 10:57:35,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 10:57:36,190 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 10:57:36,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 10:57:36,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014569645] [2022-11-16 10:57:36,191 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1014569645] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 10:57:36,191 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 10:57:36,191 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-16 10:57:36,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124623129] [2022-11-16 10:57:36,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 10:57:36,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-16 10:57:36,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 10:57:36,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-16 10:57:36,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-11-16 10:57:36,195 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 157 [2022-11-16 10:57:36,196 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 228 transitions, 942 flow. Second operand has 8 states, 8 states have (on average 110.375) internal successors, (883), 8 states have internal predecessors, (883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:57:36,196 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 10:57:36,196 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 157 [2022-11-16 10:57:36,197 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 10:57:37,786 INFO L130 PetriNetUnfolder]: 3320/7807 cut-off events. [2022-11-16 10:57:37,786 INFO L131 PetriNetUnfolder]: For 6352/6379 co-relation queries the response was YES. [2022-11-16 10:57:37,831 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20492 conditions, 7807 events. 3320/7807 cut-off events. For 6352/6379 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 58290 event pairs, 322 based on Foata normal form. 176/7802 useless extension candidates. Maximal degree in co-relation 18652. Up to 3451 conditions per place. [2022-11-16 10:57:37,866 INFO L137 encePairwiseOnDemand]: 146/157 looper letters, 161 selfloop transitions, 17 changer transitions 0/293 dead transitions. [2022-11-16 10:57:37,867 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 293 transitions, 1613 flow [2022-11-16 10:57:37,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-16 10:57:37,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-11-16 10:57:37,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1150 transitions. [2022-11-16 10:57:37,870 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.732484076433121 [2022-11-16 10:57:37,870 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1150 transitions. [2022-11-16 10:57:37,870 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1150 transitions. [2022-11-16 10:57:37,871 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 10:57:37,871 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1150 transitions. [2022-11-16 10:57:37,873 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 115.0) internal successors, (1150), 10 states have internal predecessors, (1150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:57:37,875 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 157.0) internal successors, (1727), 11 states have internal predecessors, (1727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:57:37,876 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 157.0) internal successors, (1727), 11 states have internal predecessors, (1727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:57:37,876 INFO L175 Difference]: Start difference. First operand has 193 places, 228 transitions, 942 flow. Second operand 10 states and 1150 transitions. [2022-11-16 10:57:37,877 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 293 transitions, 1613 flow [2022-11-16 10:57:37,892 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 293 transitions, 1611 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-16 10:57:37,896 INFO L231 Difference]: Finished difference. Result has 206 places, 235 transitions, 1043 flow [2022-11-16 10:57:37,897 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=940, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=228, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=211, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1043, PETRI_PLACES=206, PETRI_TRANSITIONS=235} [2022-11-16 10:57:37,898 INFO L288 CegarLoopForPetriNet]: 133 programPoint places, 73 predicate places. [2022-11-16 10:57:37,898 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 235 transitions, 1043 flow [2022-11-16 10:57:37,898 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 110.375) internal successors, (883), 8 states have internal predecessors, (883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:57:37,899 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 10:57:37,899 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 10:57:37,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-16 10:57:37,899 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-16 10:57:37,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 10:57:37,900 INFO L85 PathProgramCache]: Analyzing trace with hash 892820830, now seen corresponding path program 1 times [2022-11-16 10:57:37,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 10:57:37,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751441293] [2022-11-16 10:57:37,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 10:57:37,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 10:57:37,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 10:57:38,141 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 10:57:38,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 10:57:38,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751441293] [2022-11-16 10:57:38,142 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751441293] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 10:57:38,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1232277825] [2022-11-16 10:57:38,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 10:57:38,142 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 10:57:38,143 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf958fc2-8e14-4e53-9add-214ba807969f/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 10:57:38,144 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf958fc2-8e14-4e53-9add-214ba807969f/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 10:57:38,157 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf958fc2-8e14-4e53-9add-214ba807969f/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-16 10:57:38,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 10:57:38,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-16 10:57:38,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 10:57:38,617 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-16 10:57:38,617 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 10:57:38,854 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-16 10:57:38,854 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1232277825] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 10:57:38,855 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 10:57:38,855 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 15 [2022-11-16 10:57:38,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226983608] [2022-11-16 10:57:38,855 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 10:57:38,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-16 10:57:38,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 10:57:38,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-16 10:57:38,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2022-11-16 10:57:38,859 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 157 [2022-11-16 10:57:38,861 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 235 transitions, 1043 flow. Second operand has 15 states, 15 states have (on average 113.8) internal successors, (1707), 15 states have internal predecessors, (1707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:57:38,861 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 10:57:38,861 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 157 [2022-11-16 10:57:38,862 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 10:57:42,138 INFO L130 PetriNetUnfolder]: 6242/14500 cut-off events. [2022-11-16 10:57:42,138 INFO L131 PetriNetUnfolder]: For 15445/15549 co-relation queries the response was YES. [2022-11-16 10:57:42,235 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40444 conditions, 14500 events. 6242/14500 cut-off events. For 15445/15549 co-relation queries the response was YES. Maximal size of possible extension queue 245. Compared 122827 event pairs, 1208 based on Foata normal form. 271/14317 useless extension candidates. Maximal degree in co-relation 38526. Up to 6530 conditions per place. [2022-11-16 10:57:42,316 INFO L137 encePairwiseOnDemand]: 139/157 looper letters, 220 selfloop transitions, 84 changer transitions 0/440 dead transitions. [2022-11-16 10:57:42,316 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 440 transitions, 2756 flow [2022-11-16 10:57:42,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-16 10:57:42,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2022-11-16 10:57:42,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 2533 transitions. [2022-11-16 10:57:42,326 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.73335263462652 [2022-11-16 10:57:42,327 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 2533 transitions. [2022-11-16 10:57:42,327 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 2533 transitions. [2022-11-16 10:57:42,330 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 10:57:42,330 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 2533 transitions. [2022-11-16 10:57:42,339 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 115.13636363636364) internal successors, (2533), 22 states have internal predecessors, (2533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:57:42,346 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 157.0) internal successors, (3611), 23 states have internal predecessors, (3611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:57:42,347 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 157.0) internal successors, (3611), 23 states have internal predecessors, (3611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:57:42,347 INFO L175 Difference]: Start difference. First operand has 206 places, 235 transitions, 1043 flow. Second operand 22 states and 2533 transitions. [2022-11-16 10:57:42,348 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 440 transitions, 2756 flow [2022-11-16 10:57:42,401 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 440 transitions, 2702 flow, removed 5 selfloop flow, removed 6 redundant places. [2022-11-16 10:57:42,411 INFO L231 Difference]: Finished difference. Result has 231 places, 306 transitions, 1785 flow [2022-11-16 10:57:42,411 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=1007, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=234, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=194, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=1785, PETRI_PLACES=231, PETRI_TRANSITIONS=306} [2022-11-16 10:57:42,412 INFO L288 CegarLoopForPetriNet]: 133 programPoint places, 98 predicate places. [2022-11-16 10:57:42,412 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 306 transitions, 1785 flow [2022-11-16 10:57:42,413 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 113.8) internal successors, (1707), 15 states have internal predecessors, (1707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:57:42,413 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 10:57:42,414 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 10:57:42,431 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf958fc2-8e14-4e53-9add-214ba807969f/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-16 10:57:42,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf958fc2-8e14-4e53-9add-214ba807969f/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-16 10:57:42,621 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-16 10:57:42,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 10:57:42,622 INFO L85 PathProgramCache]: Analyzing trace with hash -1741110447, now seen corresponding path program 1 times [2022-11-16 10:57:42,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 10:57:42,622 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868897749] [2022-11-16 10:57:42,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 10:57:42,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 10:57:42,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 10:57:42,884 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 10:57:42,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 10:57:42,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868897749] [2022-11-16 10:57:42,885 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [868897749] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 10:57:42,885 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 10:57:42,885 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 10:57:42,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154381537] [2022-11-16 10:57:42,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 10:57:42,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 10:57:42,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 10:57:42,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 10:57:42,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 10:57:42,888 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 157 [2022-11-16 10:57:42,889 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 306 transitions, 1785 flow. Second operand has 4 states, 4 states have (on average 135.0) internal successors, (540), 4 states have internal predecessors, (540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:57:42,889 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 10:57:42,889 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 157 [2022-11-16 10:57:42,889 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 10:57:43,380 INFO L381 tUnfolder$Statistics]: inserting event number 4 for the transition-marking pair ([452] L37-->L38: Formula: (= |v_thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond#1_3| |v_thread1Thread1of1ForFork0_assume_abort_if_not_~cond#1_3|) InVars {thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond#1=|v_thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond#1_3|} OutVars{thread1Thread1of1ForFork0_assume_abort_if_not_~cond#1=|v_thread1Thread1of1ForFork0_assume_abort_if_not_~cond#1_3|, thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond#1=|v_thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond#1_3|} AuxVars[] AssignedVars[thread1Thread1of1ForFork0_assume_abort_if_not_~cond#1][163], [24#L101-1true, 114#L82true, Black: 1630#(and (<= |ULTIMATE.start_create_fresh_int_array_#in~size#1| 2147483647) (<= |ULTIMATE.start_create_fresh_int_array_~size#1| 2147483647) (<= ~n~0 2147483647)), 3184#(and (<= |thread2Thread1of1ForFork1_~flag~0#1| (* (div |thread2Thread1of1ForFork1_~flag~0#1| 256) 256)) (not (<= (+ (div |thread2Thread1of1ForFork1_~flag~0#1| 256) 1) 0))), Black: 2440#(and (= |thread1Thread1of1ForFork0_#t~mem1#1| 1) (= (select (select |#memory_int| ~queue~0.base) (+ (* ~front~0 4) ~queue~0.offset)) 1) (= ~sum~0 0)), Black: 2442#(and (= |thread1Thread1of1ForFork0_#t~mem1#1| 1) (= (select (select |#memory_int| ~queue~0.base) (+ (* ~front~0 4) ~queue~0.offset)) 1) (= ~sum~0 0) (= ~element~0 1)), Black: 2438#(and (= ~sum~0 0) (= ~element~0 1)), Black: 781#(<= ~back~0 ~front~0), Black: 1670#true, Black: 2434#(and (= ~back~0 ~front~0) (= ~sum~0 0)), Black: 784#(and (<= |thread1Thread1of1ForFork0_~cond~0#1| (* 256 (div |thread1Thread1of1ForFork0_~cond~0#1| 256))) (<= ~back~0 ~front~0)), thread2Thread1of1ForFork1InUse, 96#L38true, Black: 3140#(and (<= ~back~0 (+ ~front~0 1)) (<= ~n~0 2147483647)), Black: 3164#(and (<= |thread1Thread1of1ForFork0_~cond~0#1| (* 256 (div |thread1Thread1of1ForFork0_~cond~0#1| 256))) (<= ~n~0 2147483647) (<= ~back~0 ~front~0)), Black: 3150#(and (<= |thread1Thread1of1ForFork0_~cond~0#1| (* 256 (div |thread1Thread1of1ForFork0_~cond~0#1| 256))) (<= ~n~0 2147483647)), 2436#(and (= (select (select |#memory_int| ~queue~0.base) (+ (* ~front~0 4) ~queue~0.offset)) 1) (= ~sum~0 0)), 1676#(and (<= ~front~0 2147483646) (<= ~front~0 ~back~0)), Black: 2536#(<= ~n~0 2147483647), Black: 3144#(and (or (= |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| 0) (and (= |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| 1) (<= ~front~0 2147483646) (<= 0 ~front~0))) (<= ~back~0 (+ ~front~0 1)) (<= ~n~0 2147483647)), Black: 3154#(and (or (= |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| 1) (= |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| 0)) (<= ~front~0 2147483646) (<= |thread1Thread1of1ForFork0_#t~post2#1| 2147483646) (<= ~back~0 (+ ~front~0 1)) (<= ~n~0 2147483647) (<= 0 ~front~0) (or (= |thread1Thread1of1ForFork0_assume_abort_if_not_~cond#1| 1) (= |thread1Thread1of1ForFork0_assume_abort_if_not_~cond#1| 0)) (<= ~back~0 (+ |thread1Thread1of1ForFork0_#t~post2#1| 1))), Black: 3142#(and (<= ~back~0 (+ ~front~0 1)) (<= |thread1Thread1of1ForFork0_~cond~0#1| (* 256 (div |thread1Thread1of1ForFork0_~cond~0#1| 256))) (<= ~n~0 2147483647)), Black: 3148#(and (or (= |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| 1) (= |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| 0)) (<= ~front~0 2147483646) (<= ~back~0 (+ ~front~0 1)) (<= ~n~0 2147483647) (<= 0 ~front~0) (or (= |thread1Thread1of1ForFork0_assume_abort_if_not_~cond#1| 1) (= |thread1Thread1of1ForFork0_assume_abort_if_not_~cond#1| 0))), Black: 2404#(and (<= |thread1Thread1of1ForFork0_#t~mem1#1| 2147483647) (= ~sum~0 0) (<= (select (select |#memory_int| ~queue~0.base) (+ (* ~front~0 4) ~queue~0.offset)) 2147483647) (<= 0 ~front~0) (= ~queue~0.offset 0) (<= (+ (* ~front~0 4) ~queue~0.offset) 0)), Black: 3146#(and (or (and (<= ~front~0 2147483646) (= |thread1Thread1of1ForFork0_assume_abort_if_not_~cond#1| 1) (<= 0 ~front~0)) (= |thread1Thread1of1ForFork0_assume_abort_if_not_~cond#1| 0)) (or (= |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| 0) (and (= |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| 1) (<= ~front~0 2147483646) (<= 0 ~front~0))) (<= ~back~0 (+ ~front~0 1)) (<= ~n~0 2147483647)), Black: 3135#(and (<= ~n~0 2147483647) (<= ~back~0 ~front~0)), Black: 2388#(and (or (<= (+ ~front~0 ~n~0) (+ ~back~0 1)) (<= (+ (* ~front~0 4) ~queue~0.offset) 0)) (<= ~sum~0 0) (or (and (= ~sum~0 0) (<= (select (select |#memory_int| ~queue~0.base) (+ (* ~front~0 4) ~queue~0.offset)) 2147483647)) (not (= (+ (* ~front~0 4) ~queue~0.offset) 0))) (not (= ~queue~0.base |ULTIMATE.start_main_~#t2~0#1.base|)) (= ~queue~0.offset 0) (not (= ~queue~0.base |ULTIMATE.start_main_~#t1~0#1.base|)) (exists ((|v_ULTIMATE.start_create_fresh_int_array_~i~0#1_16| Int)) (and (<= |v_ULTIMATE.start_create_fresh_int_array_~i~0#1_16| 0) (<= (select (select |#memory_int| ~queue~0.base) (+ (* |v_ULTIMATE.start_create_fresh_int_array_~i~0#1_16| 4) ~queue~0.offset)) 2147483647) (<= ~n~0 (+ |v_ULTIMATE.start_create_fresh_int_array_~i~0#1_16| 1))))), Black: 2384#(and (<= (+ ~front~0 ~n~0) (+ ~back~0 1)) (not (= |ULTIMATE.start_create_fresh_int_array_#res#1.base| |ULTIMATE.start_main_~#t1~0#1.base|)) (= ~sum~0 0) (exists ((|v_ULTIMATE.start_create_fresh_int_array_~i~0#1_16| Int)) (and (<= |v_ULTIMATE.start_create_fresh_int_array_~i~0#1_16| 0) (<= (select (select |#memory_int| |ULTIMATE.start_create_fresh_int_array_#res#1.base|) (+ (* |v_ULTIMATE.start_create_fresh_int_array_~i~0#1_16| 4) |ULTIMATE.start_create_fresh_int_array_#res#1.offset|)) 2147483647) (<= ~n~0 (+ |v_ULTIMATE.start_create_fresh_int_array_~i~0#1_16| 1)))) (not (= |ULTIMATE.start_create_fresh_int_array_#res#1.base| |ULTIMATE.start_main_~#t2~0#1.base|)) (<= (select (select |#memory_int| |ULTIMATE.start_create_fresh_int_array_#res#1.base|) 0) 2147483647) (= 0 |ULTIMATE.start_create_fresh_int_array_#res#1.offset|)), Black: 3160#(and (<= |thread1Thread1of1ForFork0_#t~post2#1| 2147483646) (<= ~n~0 2147483647) (<= ~back~0 ~front~0) (<= ~back~0 (+ |thread1Thread1of1ForFork0_#t~post2#1| 1))), 3156#(and (or (and (<= ~front~0 2147483646) (= |thread1Thread1of1ForFork0_assume_abort_if_not_~cond#1| 1) (<= 0 ~front~0)) (= |thread1Thread1of1ForFork0_assume_abort_if_not_~cond#1| 0)) (or (= |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| 0) (and (= |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| 1) (<= ~front~0 2147483646) (<= 0 ~front~0))) (<= ~n~0 2147483647)), Black: 2372#(and (<= ~n~0 |ULTIMATE.start_create_fresh_int_array_#in~size#1|) (<= (+ |#StackHeapBarrier| 1) |ULTIMATE.start_main_~#t2~0#1.base|) (= (select |#valid| |ULTIMATE.start_main_~#t2~0#1.base|) 1) (<= ~n~0 |ULTIMATE.start_create_fresh_int_array_~size#1|) (<= (+ |#StackHeapBarrier| 1) |ULTIMATE.start_main_~#t1~0#1.base|) (<= (select (select |#memory_int| |ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) (+ (* |ULTIMATE.start_create_fresh_int_array_~i~0#1| 4) |ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) 2147483647) (= |ULTIMATE.start_create_fresh_int_array_~i~0#1| 0) (= ~sum~0 0) (<= ~front~0 ~back~0) (= (select |#valid| |ULTIMATE.start_main_~#t1~0#1.base|) 1) (<= ~element~0 2147483647) (<= |ULTIMATE.start_create_fresh_int_array_#t~nondet19#1| 2147483647) (not (= |ULTIMATE.start_create_fresh_int_array_~arr~0#1.base| |ULTIMATE.start_main_~#t1~0#1.base|)) (not (= |ULTIMATE.start_create_fresh_int_array_~arr~0#1.base| |ULTIMATE.start_main_~#t2~0#1.base|)) (= |ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset| 0)), Black: 2380#(and (<= ~n~0 |ULTIMATE.start_create_fresh_int_array_#in~size#1|) (<= (+ |#StackHeapBarrier| 1) |ULTIMATE.start_main_~#t2~0#1.base|) (= (select |#valid| |ULTIMATE.start_main_~#t2~0#1.base|) 1) (<= ~n~0 |ULTIMATE.start_create_fresh_int_array_~size#1|) (<= (+ |#StackHeapBarrier| 1) |ULTIMATE.start_main_~#t1~0#1.base|) (exists ((|v_ULTIMATE.start_create_fresh_int_array_~i~0#1_16| Int)) (and (<= |v_ULTIMATE.start_create_fresh_int_array_~i~0#1_16| 0) (<= (select (select |#memory_int| |ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) (+ (* |v_ULTIMATE.start_create_fresh_int_array_~i~0#1_16| 4) |ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) 2147483647) (<= |ULTIMATE.start_create_fresh_int_array_~i~0#1| (+ |v_ULTIMATE.start_create_fresh_int_array_~i~0#1_16| 1)))) (= ~sum~0 0) (<= ~front~0 ~back~0) (= (select |#valid| |ULTIMATE.start_main_~#t1~0#1.base|) 1) (<= ~element~0 2147483647) (not (= |ULTIMATE.start_create_fresh_int_array_~arr~0#1.base| |ULTIMATE.start_main_~#t1~0#1.base|)) (not (= |ULTIMATE.start_create_fresh_int_array_~arr~0#1.base| |ULTIMATE.start_main_~#t2~0#1.base|)) (<= (select (select |#memory_int| |ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) 0) 2147483647) (= |ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset| 0)), Black: 2386#(and (<= (+ ~front~0 ~n~0) (+ ~back~0 1)) (not (= |ULTIMATE.start_main_#t~ret10#1.base| |ULTIMATE.start_main_~#t2~0#1.base|)) (not (= |ULTIMATE.start_main_#t~ret10#1.base| |ULTIMATE.start_main_~#t1~0#1.base|)) (exists ((|v_ULTIMATE.start_create_fresh_int_array_~i~0#1_16| Int)) (and (<= |v_ULTIMATE.start_create_fresh_int_array_~i~0#1_16| 0) (<= ~n~0 (+ |v_ULTIMATE.start_create_fresh_int_array_~i~0#1_16| 1)) (<= (select (select |#memory_int| |ULTIMATE.start_main_#t~ret10#1.base|) (+ (* |v_ULTIMATE.start_create_fresh_int_array_~i~0#1_16| 4) |ULTIMATE.start_main_#t~ret10#1.offset|)) 2147483647))) (= ~sum~0 0) (= |ULTIMATE.start_main_#t~ret10#1.offset| 0) (<= (select (select |#memory_int| |ULTIMATE.start_main_#t~ret10#1.base|) 0) 2147483647)), Black: 812#(and (<= ~n~0 |ULTIMATE.start_create_fresh_int_array_#in~size#1|) (<= ~n~0 |ULTIMATE.start_create_fresh_int_array_~size#1|) (= |ULTIMATE.start_create_fresh_int_array_~i~0#1| 0)), Black: 1714#(and (or (and (= ~sum~0 0) (<= (select (select |#memory_int| ~queue~0.base) (+ (* ~front~0 4) ~queue~0.offset)) 2147483647)) (not (= (+ (* ~front~0 4) ~queue~0.offset) 0))) (= ~queue~0.offset 0) (<= (+ (* ~front~0 4) ~queue~0.offset) 0)), Black: 2406#(and (<= |thread1Thread1of1ForFork0_#t~mem1#1| 2147483647) (= ~sum~0 0) (<= (select (select |#memory_int| ~queue~0.base) (+ (* ~front~0 4) ~queue~0.offset)) 2147483647) (<= 0 ~front~0) (<= ~element~0 2147483647) (= ~queue~0.offset 0) (<= (+ (* ~front~0 4) ~queue~0.offset) 0)), 1693#true, Black: 2370#(and (<= ~n~0 |ULTIMATE.start_create_fresh_int_array_#in~size#1|) (<= (+ |#StackHeapBarrier| 1) |ULTIMATE.start_main_~#t2~0#1.base|) (= (select |#valid| |ULTIMATE.start_main_~#t2~0#1.base|) 1) (<= ~n~0 |ULTIMATE.start_create_fresh_int_array_~size#1|) (<= (+ |#StackHeapBarrier| 1) |ULTIMATE.start_main_~#t1~0#1.base|) (= |ULTIMATE.start_create_fresh_int_array_~i~0#1| 0) (= ~sum~0 0) (<= ~front~0 ~back~0) (= (select |#valid| |ULTIMATE.start_main_~#t1~0#1.base|) 1) (<= ~element~0 2147483647) (<= |ULTIMATE.start_create_fresh_int_array_#t~nondet19#1| 2147483647) (not (= |ULTIMATE.start_create_fresh_int_array_~arr~0#1.base| |ULTIMATE.start_main_~#t1~0#1.base|)) (not (= |ULTIMATE.start_create_fresh_int_array_~arr~0#1.base| |ULTIMATE.start_main_~#t2~0#1.base|)) (= |ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset| 0)), Black: 2391#(and (or (<= (+ ~front~0 ~n~0) (+ ~back~0 1)) (<= (+ (* ~front~0 4) ~queue~0.offset) 0)) (<= ~sum~0 0) (or (and (= ~sum~0 0) (<= (select (select |#memory_int| ~queue~0.base) (+ (* ~front~0 4) ~queue~0.offset)) 2147483647)) (not (= (+ (* ~front~0 4) ~queue~0.offset) 0))) (not (= ~queue~0.base |ULTIMATE.start_main_~#t2~0#1.base|)) (= ~queue~0.offset 0) (exists ((|v_ULTIMATE.start_create_fresh_int_array_~i~0#1_16| Int)) (and (<= |v_ULTIMATE.start_create_fresh_int_array_~i~0#1_16| 0) (<= (select (select |#memory_int| ~queue~0.base) (+ (* |v_ULTIMATE.start_create_fresh_int_array_~i~0#1_16| 4) ~queue~0.offset)) 2147483647) (<= ~n~0 (+ |v_ULTIMATE.start_create_fresh_int_array_~i~0#1_16| 1))))), 1638#(and (<= |ULTIMATE.start_create_fresh_int_array_~i~0#1| 1) (<= |ULTIMATE.start_create_fresh_int_array_#in~size#1| 2147483647) (<= |ULTIMATE.start_create_fresh_int_array_~size#1| 2147483647) (<= ~n~0 2147483647)), Black: 2395#(and (<= ~sum~0 0) (or (and (= ~sum~0 0) (<= (select (select |#memory_int| ~queue~0.base) (+ (* ~front~0 4) ~queue~0.offset)) 2147483647)) (not (= (+ (* ~front~0 4) ~queue~0.offset) 0))) (= ~queue~0.offset 0) (<= (+ (* ~front~0 4) ~queue~0.offset) 0) (exists ((|v_ULTIMATE.start_create_fresh_int_array_~i~0#1_16| Int)) (and (<= |v_ULTIMATE.start_create_fresh_int_array_~i~0#1_16| 0) (<= (select (select |#memory_int| ~queue~0.base) (+ (* |v_ULTIMATE.start_create_fresh_int_array_~i~0#1_16| 4) ~queue~0.offset)) 2147483647) (<= ~n~0 (+ |v_ULTIMATE.start_create_fresh_int_array_~i~0#1_16| 1))))), Black: 2367#(and (<= ~n~0 |ULTIMATE.start_create_fresh_int_array_#in~size#1|) (<= (+ |#StackHeapBarrier| 1) |ULTIMATE.start_main_~#t2~0#1.base|) (= (select |#valid| |ULTIMATE.start_main_~#t2~0#1.base|) 1) (<= ~n~0 |ULTIMATE.start_create_fresh_int_array_~size#1|) (<= (+ |#StackHeapBarrier| 1) |ULTIMATE.start_main_~#t1~0#1.base|) (= |ULTIMATE.start_create_fresh_int_array_~i~0#1| 0) (= ~sum~0 0) (<= ~front~0 ~back~0) (= (select |#valid| |ULTIMATE.start_main_~#t1~0#1.base|) 1) (<= ~element~0 2147483647) (not (= |ULTIMATE.start_create_fresh_int_array_~arr~0#1.base| |ULTIMATE.start_main_~#t1~0#1.base|)) (not (= |ULTIMATE.start_create_fresh_int_array_~arr~0#1.base| |ULTIMATE.start_main_~#t2~0#1.base|)) (= |ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset| 0)), Black: 1717#(and (= ~sum~0 0) (<= (select (select |#memory_int| ~queue~0.base) (+ (* ~front~0 4) ~queue~0.offset)) 2147483647) (<= 0 ~front~0) (= ~queue~0.offset 0) (<= (+ (* ~front~0 4) ~queue~0.offset) 0)), Black: 2382#(and (<= (+ ~front~0 ~n~0) (+ ~back~0 1)) (= ~sum~0 0) (exists ((|v_ULTIMATE.start_create_fresh_int_array_~i~0#1_16| Int)) (and (<= |v_ULTIMATE.start_create_fresh_int_array_~i~0#1_16| 0) (<= ~n~0 (+ |v_ULTIMATE.start_create_fresh_int_array_~i~0#1_16| 1)) (<= (select (select |#memory_int| |ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) (+ (* |v_ULTIMATE.start_create_fresh_int_array_~i~0#1_16| 4) |ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) 2147483647))) (not (= |ULTIMATE.start_create_fresh_int_array_~arr~0#1.base| |ULTIMATE.start_main_~#t1~0#1.base|)) (not (= |ULTIMATE.start_create_fresh_int_array_~arr~0#1.base| |ULTIMATE.start_main_~#t2~0#1.base|)) (<= (select (select |#memory_int| |ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) 0) 2147483647) (= |ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset| 0)), Black: 166#true, Black: 2428#(= |thread2Thread1of1ForFork1_~flag~0#1| 1)]) [2022-11-16 10:57:43,385 INFO L383 tUnfolder$Statistics]: this new event has 110 ancestors and is cut-off event [2022-11-16 10:57:43,385 INFO L386 tUnfolder$Statistics]: existing Event has 96 ancestors and is cut-off event [2022-11-16 10:57:43,385 INFO L386 tUnfolder$Statistics]: existing Event has 96 ancestors and is cut-off event [2022-11-16 10:57:43,386 INFO L386 tUnfolder$Statistics]: existing Event has 96 ancestors and is cut-off event [2022-11-16 10:57:45,878 INFO L130 PetriNetUnfolder]: 3863/14012 cut-off events. [2022-11-16 10:57:45,879 INFO L131 PetriNetUnfolder]: For 16340/17252 co-relation queries the response was YES. [2022-11-16 10:57:45,967 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37046 conditions, 14012 events. 3863/14012 cut-off events. For 16340/17252 co-relation queries the response was YES. Maximal size of possible extension queue 223. Compared 140436 event pairs, 1293 based on Foata normal form. 939/14272 useless extension candidates. Maximal degree in co-relation 25364. Up to 5152 conditions per place. [2022-11-16 10:57:46,028 INFO L137 encePairwiseOnDemand]: 153/157 looper letters, 70 selfloop transitions, 4 changer transitions 1/255 dead transitions. [2022-11-16 10:57:46,029 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 255 transitions, 1553 flow [2022-11-16 10:57:46,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 10:57:46,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-16 10:57:46,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 543 transitions. [2022-11-16 10:57:46,031 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8646496815286624 [2022-11-16 10:57:46,031 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 543 transitions. [2022-11-16 10:57:46,031 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 543 transitions. [2022-11-16 10:57:46,032 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 10:57:46,032 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 543 transitions. [2022-11-16 10:57:46,033 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 135.75) internal successors, (543), 4 states have internal predecessors, (543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:57:46,035 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 157.0) internal successors, (785), 5 states have internal predecessors, (785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:57:46,035 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 157.0) internal successors, (785), 5 states have internal predecessors, (785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:57:46,035 INFO L175 Difference]: Start difference. First operand has 231 places, 306 transitions, 1785 flow. Second operand 4 states and 543 transitions. [2022-11-16 10:57:46,036 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 255 transitions, 1553 flow [2022-11-16 10:57:46,128 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 255 transitions, 1369 flow, removed 60 selfloop flow, removed 11 redundant places. [2022-11-16 10:57:46,132 INFO L231 Difference]: Finished difference. Result has 224 places, 252 transitions, 1221 flow [2022-11-16 10:57:46,133 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=1206, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=252, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=249, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1221, PETRI_PLACES=224, PETRI_TRANSITIONS=252} [2022-11-16 10:57:46,133 INFO L288 CegarLoopForPetriNet]: 133 programPoint places, 91 predicate places. [2022-11-16 10:57:46,133 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 252 transitions, 1221 flow [2022-11-16 10:57:46,134 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 135.0) internal successors, (540), 4 states have internal predecessors, (540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:57:46,134 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 10:57:46,134 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 10:57:46,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-16 10:57:46,135 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-16 10:57:46,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 10:57:46,135 INFO L85 PathProgramCache]: Analyzing trace with hash 429256682, now seen corresponding path program 1 times [2022-11-16 10:57:46,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 10:57:46,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887389058] [2022-11-16 10:57:46,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 10:57:46,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 10:57:46,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 10:57:46,758 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-16 10:57:46,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 10:57:46,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887389058] [2022-11-16 10:57:46,758 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1887389058] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 10:57:46,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274740263] [2022-11-16 10:57:46,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 10:57:46,759 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 10:57:46,759 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf958fc2-8e14-4e53-9add-214ba807969f/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 10:57:46,760 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf958fc2-8e14-4e53-9add-214ba807969f/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 10:57:46,792 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf958fc2-8e14-4e53-9add-214ba807969f/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-16 10:57:46,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 10:57:46,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-16 10:57:46,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 10:57:47,592 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 14 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 10:57:47,592 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 10:57:48,263 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 13 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 10:57:48,263 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1274740263] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 10:57:48,263 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 10:57:48,263 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15, 15] total 36 [2022-11-16 10:57:48,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614523034] [2022-11-16 10:57:48,263 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 10:57:48,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-16 10:57:48,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 10:57:48,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-16 10:57:48,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=1117, Unknown=0, NotChecked=0, Total=1260 [2022-11-16 10:57:48,268 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 157 [2022-11-16 10:57:48,272 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 252 transitions, 1221 flow. Second operand has 36 states, 36 states have (on average 101.16666666666667) internal successors, (3642), 36 states have internal predecessors, (3642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:57:48,272 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 10:57:48,272 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 157 [2022-11-16 10:57:48,273 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 10:57:53,223 INFO L130 PetriNetUnfolder]: 5253/15584 cut-off events. [2022-11-16 10:57:53,223 INFO L131 PetriNetUnfolder]: For 17468/17637 co-relation queries the response was YES. [2022-11-16 10:57:53,320 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42278 conditions, 15584 events. 5253/15584 cut-off events. For 17468/17637 co-relation queries the response was YES. Maximal size of possible extension queue 255. Compared 150261 event pairs, 1715 based on Foata normal form. 58/14958 useless extension candidates. Maximal degree in co-relation 26595. Up to 6086 conditions per place. [2022-11-16 10:57:53,376 INFO L137 encePairwiseOnDemand]: 137/157 looper letters, 125 selfloop transitions, 19 changer transitions 137/370 dead transitions. [2022-11-16 10:57:53,376 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 370 transitions, 2376 flow [2022-11-16 10:57:53,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-16 10:57:53,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2022-11-16 10:57:53,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 2780 transitions. [2022-11-16 10:57:53,384 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6558150507195093 [2022-11-16 10:57:53,384 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 2780 transitions. [2022-11-16 10:57:53,384 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 2780 transitions. [2022-11-16 10:57:53,386 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 10:57:53,386 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 2780 transitions. [2022-11-16 10:57:53,392 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 102.96296296296296) internal successors, (2780), 27 states have internal predecessors, (2780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:57:53,398 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 157.0) internal successors, (4396), 28 states have internal predecessors, (4396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:57:53,400 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 157.0) internal successors, (4396), 28 states have internal predecessors, (4396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:57:53,401 INFO L175 Difference]: Start difference. First operand has 224 places, 252 transitions, 1221 flow. Second operand 27 states and 2780 transitions. [2022-11-16 10:57:53,401 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 370 transitions, 2376 flow [2022-11-16 10:57:53,467 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 370 transitions, 2371 flow, removed 2 selfloop flow, removed 1 redundant places. [2022-11-16 10:57:53,473 INFO L231 Difference]: Finished difference. Result has 263 places, 202 transitions, 1017 flow [2022-11-16 10:57:53,474 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=1147, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=1017, PETRI_PLACES=263, PETRI_TRANSITIONS=202} [2022-11-16 10:57:53,474 INFO L288 CegarLoopForPetriNet]: 133 programPoint places, 130 predicate places. [2022-11-16 10:57:53,475 INFO L495 AbstractCegarLoop]: Abstraction has has 263 places, 202 transitions, 1017 flow [2022-11-16 10:57:53,477 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 101.16666666666667) internal successors, (3642), 36 states have internal predecessors, (3642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:57:53,477 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 10:57:53,478 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 10:57:53,483 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf958fc2-8e14-4e53-9add-214ba807969f/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-16 10:57:53,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf958fc2-8e14-4e53-9add-214ba807969f/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 10:57:53,684 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-16 10:57:53,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 10:57:53,684 INFO L85 PathProgramCache]: Analyzing trace with hash 763453216, now seen corresponding path program 2 times [2022-11-16 10:57:53,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 10:57:53,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800843109] [2022-11-16 10:57:53,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 10:57:53,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 10:57:53,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 10:57:54,744 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-16 10:57:54,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 10:57:54,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800843109] [2022-11-16 10:57:54,745 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800843109] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 10:57:54,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1710396843] [2022-11-16 10:57:54,745 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 10:57:54,745 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 10:57:54,745 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf958fc2-8e14-4e53-9add-214ba807969f/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 10:57:54,751 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf958fc2-8e14-4e53-9add-214ba807969f/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 10:57:54,775 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf958fc2-8e14-4e53-9add-214ba807969f/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-16 10:57:54,925 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 10:57:54,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 10:57:54,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 55 conjunts are in the unsatisfiable core [2022-11-16 10:57:54,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 10:57:55,612 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-16 10:57:56,020 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-16 10:57:56,100 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-16 10:57:57,342 INFO L321 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-11-16 10:57:57,343 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 12 [2022-11-16 10:57:57,463 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 4 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 10:57:57,464 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 10:58:00,492 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 10:58:00,493 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 51 [2022-11-16 10:58:00,509 INFO L321 Elim1Store]: treesize reduction 5, result has 64.3 percent of original size [2022-11-16 10:58:00,509 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 152 treesize of output 144 [2022-11-16 10:58:00,521 INFO L321 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2022-11-16 10:58:00,522 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 135 treesize of output 109 [2022-11-16 10:58:00,535 INFO L321 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2022-11-16 10:58:00,535 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 88 treesize of output 75 [2022-11-16 10:58:01,747 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 10:58:01,747 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1710396843] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 10:58:01,747 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 10:58:01,747 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 31, 28] total 71 [2022-11-16 10:58:01,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025110959] [2022-11-16 10:58:01,747 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 10:58:01,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2022-11-16 10:58:01,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 10:58:01,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2022-11-16 10:58:01,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=4648, Unknown=29, NotChecked=0, Total=5112 [2022-11-16 10:58:01,754 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 157 [2022-11-16 10:58:01,758 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 202 transitions, 1017 flow. Second operand has 72 states, 72 states have (on average 69.20833333333333) internal successors, (4983), 72 states have internal predecessors, (4983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:58:01,759 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 10:58:01,759 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 157 [2022-11-16 10:58:01,759 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 10:58:25,821 INFO L130 PetriNetUnfolder]: 17741/40275 cut-off events. [2022-11-16 10:58:25,822 INFO L131 PetriNetUnfolder]: For 115135/115559 co-relation queries the response was YES. [2022-11-16 10:58:26,198 INFO L83 FinitePrefix]: Finished finitePrefix Result has 140341 conditions, 40275 events. 17741/40275 cut-off events. For 115135/115559 co-relation queries the response was YES. Maximal size of possible extension queue 819. Compared 412826 event pairs, 1654 based on Foata normal form. 456/39264 useless extension candidates. Maximal degree in co-relation 71749. Up to 18275 conditions per place. [2022-11-16 10:58:26,483 INFO L137 encePairwiseOnDemand]: 115/157 looper letters, 558 selfloop transitions, 409 changer transitions 23/1045 dead transitions. [2022-11-16 10:58:26,483 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 352 places, 1045 transitions, 8216 flow [2022-11-16 10:58:26,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2022-11-16 10:58:26,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2022-11-16 10:58:26,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 8525 transitions. [2022-11-16 10:58:26,502 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.45629716854894825 [2022-11-16 10:58:26,503 INFO L72 ComplementDD]: Start complementDD. Operand 119 states and 8525 transitions. [2022-11-16 10:58:26,503 INFO L73 IsDeterministic]: Start isDeterministic. Operand 119 states and 8525 transitions. [2022-11-16 10:58:26,507 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 10:58:26,507 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 119 states and 8525 transitions. [2022-11-16 10:58:26,526 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 120 states, 119 states have (on average 71.63865546218487) internal successors, (8525), 119 states have internal predecessors, (8525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:58:26,554 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 120 states, 120 states have (on average 157.0) internal successors, (18840), 120 states have internal predecessors, (18840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:58:26,561 INFO L81 ComplementDD]: Finished complementDD. Result has 120 states, 120 states have (on average 157.0) internal successors, (18840), 120 states have internal predecessors, (18840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:58:26,562 INFO L175 Difference]: Start difference. First operand has 263 places, 202 transitions, 1017 flow. Second operand 119 states and 8525 transitions. [2022-11-16 10:58:26,562 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 352 places, 1045 transitions, 8216 flow [2022-11-16 10:58:27,116 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 320 places, 1045 transitions, 7430 flow, removed 380 selfloop flow, removed 32 redundant places. [2022-11-16 10:58:27,132 INFO L231 Difference]: Finished difference. Result has 362 places, 602 transitions, 4926 flow [2022-11-16 10:58:27,133 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=930, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=119, PETRI_FLOW=4926, PETRI_PLACES=362, PETRI_TRANSITIONS=602} [2022-11-16 10:58:27,133 INFO L288 CegarLoopForPetriNet]: 133 programPoint places, 229 predicate places. [2022-11-16 10:58:27,134 INFO L495 AbstractCegarLoop]: Abstraction has has 362 places, 602 transitions, 4926 flow [2022-11-16 10:58:27,135 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 69.20833333333333) internal successors, (4983), 72 states have internal predecessors, (4983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:58:27,135 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 10:58:27,136 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 10:58:27,147 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf958fc2-8e14-4e53-9add-214ba807969f/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-16 10:58:27,341 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf958fc2-8e14-4e53-9add-214ba807969f/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-16 10:58:27,341 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-16 10:58:27,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 10:58:27,342 INFO L85 PathProgramCache]: Analyzing trace with hash 125420334, now seen corresponding path program 3 times [2022-11-16 10:58:27,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 10:58:27,342 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151444657] [2022-11-16 10:58:27,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 10:58:27,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 10:58:27,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 10:58:30,402 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 10:58:30,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 10:58:30,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151444657] [2022-11-16 10:58:30,402 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151444657] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 10:58:30,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1768992352] [2022-11-16 10:58:30,403 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 10:58:30,403 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 10:58:30,403 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf958fc2-8e14-4e53-9add-214ba807969f/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 10:58:30,404 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf958fc2-8e14-4e53-9add-214ba807969f/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 10:58:30,409 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf958fc2-8e14-4e53-9add-214ba807969f/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-16 10:58:30,558 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-16 10:58:30,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 10:58:30,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-16 10:58:30,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 10:58:30,963 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2022-11-16 10:58:31,068 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-16 10:58:31,069 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 10:58:31,383 INFO L321 Elim1Store]: treesize reduction 5, result has 64.3 percent of original size [2022-11-16 10:58:31,384 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2022-11-16 10:58:31,533 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-16 10:58:31,534 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1768992352] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 10:58:31,534 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 10:58:31,534 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 10, 10] total 47 [2022-11-16 10:58:31,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143865385] [2022-11-16 10:58:31,534 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 10:58:31,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-11-16 10:58:31,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 10:58:31,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-11-16 10:58:31,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=2065, Unknown=0, NotChecked=0, Total=2256 [2022-11-16 10:58:31,540 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 157 [2022-11-16 10:58:31,542 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 362 places, 602 transitions, 4926 flow. Second operand has 48 states, 48 states have (on average 76.72916666666667) internal successors, (3683), 48 states have internal predecessors, (3683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:58:31,542 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 10:58:31,542 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 157 [2022-11-16 10:58:31,542 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 10:59:00,154 INFO L130 PetriNetUnfolder]: 24398/56346 cut-off events. [2022-11-16 10:59:00,154 INFO L131 PetriNetUnfolder]: For 513932/515085 co-relation queries the response was YES. [2022-11-16 10:59:00,913 INFO L83 FinitePrefix]: Finished finitePrefix Result has 281674 conditions, 56346 events. 24398/56346 cut-off events. For 513932/515085 co-relation queries the response was YES. Maximal size of possible extension queue 1146. Compared 615516 event pairs, 3142 based on Foata normal form. 511/54935 useless extension candidates. Maximal degree in co-relation 272574. Up to 25211 conditions per place. [2022-11-16 10:59:01,155 INFO L137 encePairwiseOnDemand]: 122/157 looper letters, 990 selfloop transitions, 435 changer transitions 0/1483 dead transitions. [2022-11-16 10:59:01,156 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 476 places, 1483 transitions, 16559 flow [2022-11-16 10:59:01,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2022-11-16 10:59:01,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2022-11-16 10:59:01,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 9132 transitions. [2022-11-16 10:59:01,174 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5014276301339776 [2022-11-16 10:59:01,174 INFO L72 ComplementDD]: Start complementDD. Operand 116 states and 9132 transitions. [2022-11-16 10:59:01,174 INFO L73 IsDeterministic]: Start isDeterministic. Operand 116 states and 9132 transitions. [2022-11-16 10:59:01,178 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 10:59:01,178 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 116 states and 9132 transitions. [2022-11-16 10:59:01,193 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 117 states, 116 states have (on average 78.72413793103448) internal successors, (9132), 116 states have internal predecessors, (9132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:59:01,212 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 117 states, 117 states have (on average 157.0) internal successors, (18369), 117 states have internal predecessors, (18369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:59:01,217 INFO L81 ComplementDD]: Finished complementDD. Result has 117 states, 117 states have (on average 157.0) internal successors, (18369), 117 states have internal predecessors, (18369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:59:01,217 INFO L175 Difference]: Start difference. First operand has 362 places, 602 transitions, 4926 flow. Second operand 116 states and 9132 transitions. [2022-11-16 10:59:01,217 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 476 places, 1483 transitions, 16559 flow [2022-11-16 10:59:14,128 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 450 places, 1483 transitions, 15642 flow, removed 349 selfloop flow, removed 26 redundant places. [2022-11-16 10:59:14,142 INFO L231 Difference]: Finished difference. Result has 511 places, 832 transitions, 8176 flow [2022-11-16 10:59:14,143 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=4497, PETRI_DIFFERENCE_MINUEND_PLACES=335, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=602, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=226, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=327, PETRI_DIFFERENCE_SUBTRAHEND_STATES=116, PETRI_FLOW=8176, PETRI_PLACES=511, PETRI_TRANSITIONS=832} [2022-11-16 10:59:14,143 INFO L288 CegarLoopForPetriNet]: 133 programPoint places, 378 predicate places. [2022-11-16 10:59:14,143 INFO L495 AbstractCegarLoop]: Abstraction has has 511 places, 832 transitions, 8176 flow [2022-11-16 10:59:14,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 76.72916666666667) internal successors, (3683), 48 states have internal predecessors, (3683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:59:14,144 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 10:59:14,144 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 10:59:14,149 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf958fc2-8e14-4e53-9add-214ba807969f/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-11-16 10:59:14,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf958fc2-8e14-4e53-9add-214ba807969f/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-16 10:59:14,345 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-16 10:59:14,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 10:59:14,345 INFO L85 PathProgramCache]: Analyzing trace with hash 416910160, now seen corresponding path program 1 times [2022-11-16 10:59:14,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 10:59:14,346 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108885655] [2022-11-16 10:59:14,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 10:59:14,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 10:59:14,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 10:59:15,071 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-16 10:59:15,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 10:59:15,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108885655] [2022-11-16 10:59:15,071 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1108885655] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 10:59:15,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1389632365] [2022-11-16 10:59:15,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 10:59:15,071 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 10:59:15,072 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf958fc2-8e14-4e53-9add-214ba807969f/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 10:59:15,073 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf958fc2-8e14-4e53-9add-214ba807969f/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 10:59:15,091 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf958fc2-8e14-4e53-9add-214ba807969f/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-16 10:59:15,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 10:59:15,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 49 conjunts are in the unsatisfiable core [2022-11-16 10:59:15,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 10:59:17,283 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 10:59:17,283 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 15 [2022-11-16 10:59:17,387 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 10:59:17,388 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 10:59:18,543 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 10:59:18,543 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 52 treesize of output 70 [2022-11-16 10:59:20,016 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 10:59:20,016 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1389632365] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 10:59:20,017 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 10:59:20,017 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 27, 27] total 66 [2022-11-16 10:59:20,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085521228] [2022-11-16 10:59:20,017 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 10:59:20,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-11-16 10:59:20,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 10:59:20,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-11-16 10:59:20,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=3827, Unknown=0, NotChecked=0, Total=4422 [2022-11-16 10:59:20,025 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 157 [2022-11-16 10:59:20,029 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 511 places, 832 transitions, 8176 flow. Second operand has 67 states, 67 states have (on average 83.16417910447761) internal successors, (5572), 67 states have internal predecessors, (5572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:59:20,030 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 10:59:20,030 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 157 [2022-11-16 10:59:20,030 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand