./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/weaver/popl20-two-queue.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version b5237d83 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e068d3d-7efe-44b8-999f-5009eaf120f0/bin/uautomizer-vX5HgA9Q3a/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e068d3d-7efe-44b8-999f-5009eaf120f0/bin/uautomizer-vX5HgA9Q3a/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e068d3d-7efe-44b8-999f-5009eaf120f0/bin/uautomizer-vX5HgA9Q3a/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e068d3d-7efe-44b8-999f-5009eaf120f0/bin/uautomizer-vX5HgA9Q3a/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-two-queue.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e068d3d-7efe-44b8-999f-5009eaf120f0/bin/uautomizer-vX5HgA9Q3a/config/svcomp-Overflow-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e068d3d-7efe-44b8-999f-5009eaf120f0/bin/uautomizer-vX5HgA9Q3a --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 2173db9a2274c43e93688b39a8ab5256e9054c31e7330b4f58c34c545dbb4480 --- 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-b5237d8 [2022-11-21 16:49:07,845 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-21 16:49:07,848 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-21 16:49:07,897 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-21 16:49:07,897 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-21 16:49:07,902 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-21 16:49:07,904 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-21 16:49:07,908 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-21 16:49:07,910 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-21 16:49:07,916 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-21 16:49:07,918 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-21 16:49:07,920 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-21 16:49:07,921 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-21 16:49:07,923 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-21 16:49:07,925 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-21 16:49:07,928 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-21 16:49:07,930 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-21 16:49:07,931 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-21 16:49:07,933 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-21 16:49:07,940 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-21 16:49:07,942 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-21 16:49:07,945 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-21 16:49:07,946 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-21 16:49:07,947 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-21 16:49:07,959 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-21 16:49:07,960 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-21 16:49:07,960 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-21 16:49:07,962 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-21 16:49:07,964 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-21 16:49:07,965 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-21 16:49:07,965 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-21 16:49:07,966 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-21 16:49:07,968 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-21 16:49:07,969 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-21 16:49:07,970 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-21 16:49:07,971 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-21 16:49:07,972 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-21 16:49:07,972 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-21 16:49:07,972 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-21 16:49:07,974 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-21 16:49:07,975 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-21 16:49:07,976 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e068d3d-7efe-44b8-999f-5009eaf120f0/bin/uautomizer-vX5HgA9Q3a/config/svcomp-Overflow-32bit-Automizer_Default.epf [2022-11-21 16:49:08,026 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-21 16:49:08,026 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-21 16:49:08,027 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-21 16:49:08,027 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-21 16:49:08,028 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-21 16:49:08,028 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-21 16:49:08,029 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-21 16:49:08,030 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-21 16:49:08,030 INFO L138 SettingsManager]: * Use SBE=true [2022-11-21 16:49:08,030 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-21 16:49:08,031 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-21 16:49:08,032 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-21 16:49:08,032 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-21 16:49:08,032 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-21 16:49:08,033 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-21 16:49:08,033 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-21 16:49:08,033 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-21 16:49:08,033 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-21 16:49:08,034 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2022-11-21 16:49:08,034 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-21 16:49:08,034 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-21 16:49:08,034 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-21 16:49:08,035 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-21 16:49:08,035 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-21 16:49:08,035 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-21 16:49:08,035 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-21 16:49:08,036 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-21 16:49:08,036 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-21 16:49:08,037 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-21 16:49:08,037 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-21 16:49:08,037 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-21 16:49:08,038 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-21 16:49:08,038 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-21 16:49:08,038 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-21 16:49:08,039 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-21 16:49:08,039 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_1e068d3d-7efe-44b8-999f-5009eaf120f0/bin/uautomizer-vX5HgA9Q3a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e068d3d-7efe-44b8-999f-5009eaf120f0/bin/uautomizer-vX5HgA9Q3a Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2173db9a2274c43e93688b39a8ab5256e9054c31e7330b4f58c34c545dbb4480 [2022-11-21 16:49:08,432 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-21 16:49:08,461 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-21 16:49:08,464 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-21 16:49:08,466 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-21 16:49:08,466 INFO L275 PluginConnector]: CDTParser initialized [2022-11-21 16:49:08,468 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e068d3d-7efe-44b8-999f-5009eaf120f0/bin/uautomizer-vX5HgA9Q3a/../../sv-benchmarks/c/weaver/popl20-two-queue.wvr.c [2022-11-21 16:49:11,572 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-21 16:49:11,854 INFO L351 CDTParser]: Found 1 translation units. [2022-11-21 16:49:11,854 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e068d3d-7efe-44b8-999f-5009eaf120f0/sv-benchmarks/c/weaver/popl20-two-queue.wvr.c [2022-11-21 16:49:11,863 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e068d3d-7efe-44b8-999f-5009eaf120f0/bin/uautomizer-vX5HgA9Q3a/data/20f4600ff/d97a427f2dff4280a6247b3ee226fde9/FLAG57800ab81 [2022-11-21 16:49:11,888 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e068d3d-7efe-44b8-999f-5009eaf120f0/bin/uautomizer-vX5HgA9Q3a/data/20f4600ff/d97a427f2dff4280a6247b3ee226fde9 [2022-11-21 16:49:11,892 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-21 16:49:11,894 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-21 16:49:11,897 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-21 16:49:11,898 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-21 16:49:11,902 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-21 16:49:11,903 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 04:49:11" (1/1) ... [2022-11-21 16:49:11,904 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4149000c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:49:11, skipping insertion in model container [2022-11-21 16:49:11,905 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 04:49:11" (1/1) ... [2022-11-21 16:49:11,914 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-21 16:49:11,938 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-21 16:49:12,117 WARN L237 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_1e068d3d-7efe-44b8-999f-5009eaf120f0/sv-benchmarks/c/weaver/popl20-two-queue.wvr.c[2987,3000] [2022-11-21 16:49:12,123 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-21 16:49:12,135 INFO L203 MainTranslator]: Completed pre-run [2022-11-21 16:49:12,163 WARN L237 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_1e068d3d-7efe-44b8-999f-5009eaf120f0/sv-benchmarks/c/weaver/popl20-two-queue.wvr.c[2987,3000] [2022-11-21 16:49:12,167 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-21 16:49:12,182 INFO L208 MainTranslator]: Completed translation [2022-11-21 16:49:12,182 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:49:12 WrapperNode [2022-11-21 16:49:12,183 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-21 16:49:12,184 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-21 16:49:12,184 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-21 16:49:12,184 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-21 16:49:12,191 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:49:12" (1/1) ... [2022-11-21 16:49:12,199 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:49:12" (1/1) ... [2022-11-21 16:49:12,226 INFO L138 Inliner]: procedures = 24, calls = 43, calls flagged for inlining = 13, calls inlined = 15, statements flattened = 216 [2022-11-21 16:49:12,227 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-21 16:49:12,228 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-21 16:49:12,228 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-21 16:49:12,228 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-21 16:49:12,239 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:49:12" (1/1) ... [2022-11-21 16:49:12,239 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:49:12" (1/1) ... [2022-11-21 16:49:12,243 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:49:12" (1/1) ... [2022-11-21 16:49:12,243 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:49:12" (1/1) ... [2022-11-21 16:49:12,252 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:49:12" (1/1) ... [2022-11-21 16:49:12,257 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:49:12" (1/1) ... [2022-11-21 16:49:12,259 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:49:12" (1/1) ... [2022-11-21 16:49:12,261 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:49:12" (1/1) ... [2022-11-21 16:49:12,264 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-21 16:49:12,266 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-21 16:49:12,266 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-21 16:49:12,266 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-21 16:49:12,267 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:49:12" (1/1) ... [2022-11-21 16:49:12,274 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-21 16:49:12,287 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e068d3d-7efe-44b8-999f-5009eaf120f0/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:49:12,313 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e068d3d-7efe-44b8-999f-5009eaf120f0/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-21 16:49:12,332 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e068d3d-7efe-44b8-999f-5009eaf120f0/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-21 16:49:12,366 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-21 16:49:12,366 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-21 16:49:12,366 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-21 16:49:12,366 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-21 16:49:12,367 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-21 16:49:12,367 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-21 16:49:12,367 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-21 16:49:12,367 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-21 16:49:12,368 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-21 16:49:12,368 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-21 16:49:12,368 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-21 16:49:12,368 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-21 16:49:12,368 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-21 16:49:12,369 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-21 16:49:12,369 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-21 16:49:12,371 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-21 16:49:12,477 INFO L235 CfgBuilder]: Building ICFG [2022-11-21 16:49:12,480 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-21 16:49:13,058 INFO L276 CfgBuilder]: Performing block encoding [2022-11-21 16:49:13,324 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-21 16:49:13,324 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-11-21 16:49:13,327 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 04:49:13 BoogieIcfgContainer [2022-11-21 16:49:13,327 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-21 16:49:13,331 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-21 16:49:13,332 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-21 16:49:13,336 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-21 16:49:13,336 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 04:49:11" (1/3) ... [2022-11-21 16:49:13,337 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@525455fb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 04:49:13, skipping insertion in model container [2022-11-21 16:49:13,338 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:49:12" (2/3) ... [2022-11-21 16:49:13,340 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@525455fb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 04:49:13, skipping insertion in model container [2022-11-21 16:49:13,341 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 04:49:13" (3/3) ... [2022-11-21 16:49:13,345 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-two-queue.wvr.c [2022-11-21 16:49:13,356 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-21 16:49:13,369 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-21 16:49:13,369 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 16 error locations. [2022-11-21 16:49:13,370 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-21 16:49:13,458 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-21 16:49:13,502 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 195 places, 201 transitions, 418 flow [2022-11-21 16:49:13,632 INFO L130 PetriNetUnfolder]: 13/199 cut-off events. [2022-11-21 16:49:13,632 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-21 16:49:13,638 INFO L83 FinitePrefix]: Finished finitePrefix Result has 208 conditions, 199 events. 13/199 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 161 event pairs, 0 based on Foata normal form. 0/170 useless extension candidates. Maximal degree in co-relation 157. Up to 2 conditions per place. [2022-11-21 16:49:13,639 INFO L82 GeneralOperation]: Start removeDead. Operand has 195 places, 201 transitions, 418 flow [2022-11-21 16:49:13,646 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 175 places, 180 transitions, 369 flow [2022-11-21 16:49:13,658 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-21 16:49:13,665 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;@71ca7ed5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-21 16:49:13,665 INFO L358 AbstractCegarLoop]: Starting to check reachability of 30 error locations. [2022-11-21 16:49:13,687 INFO L130 PetriNetUnfolder]: 3/78 cut-off events. [2022-11-21 16:49:13,687 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-21 16:49:13,688 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:49:13,719 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] [2022-11-21 16:49:13,720 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 27 more)] === [2022-11-21 16:49:13,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:49:13,743 INFO L85 PathProgramCache]: Analyzing trace with hash -1704221954, now seen corresponding path program 1 times [2022-11-21 16:49:13,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:49:13,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794007829] [2022-11-21 16:49:13,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:49:13,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:49:13,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:49:14,265 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:49:14,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:49:14,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794007829] [2022-11-21 16:49:14,267 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794007829] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:49:14,267 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:49:14,268 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 16:49:14,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159989030] [2022-11-21 16:49:14,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:49:14,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-21 16:49:14,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:49:14,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-21 16:49:14,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-21 16:49:14,328 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 201 [2022-11-21 16:49:14,332 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 180 transitions, 369 flow. Second operand has 4 states, 4 states have (on average 152.5) internal successors, (610), 4 states have internal predecessors, (610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:49:14,333 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:49:14,333 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 201 [2022-11-21 16:49:14,334 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 16:49:14,610 INFO L130 PetriNetUnfolder]: 71/456 cut-off events. [2022-11-21 16:49:14,611 INFO L131 PetriNetUnfolder]: For 42/50 co-relation queries the response was YES. [2022-11-21 16:49:14,613 INFO L83 FinitePrefix]: Finished finitePrefix Result has 653 conditions, 456 events. 71/456 cut-off events. For 42/50 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1845 event pairs, 48 based on Foata normal form. 28/364 useless extension candidates. Maximal degree in co-relation 259. Up to 85 conditions per place. [2022-11-21 16:49:14,619 INFO L137 encePairwiseOnDemand]: 176/201 looper letters, 54 selfloop transitions, 9 changer transitions 4/196 dead transitions. [2022-11-21 16:49:14,620 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 196 transitions, 536 flow [2022-11-21 16:49:14,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-21 16:49:14,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-21 16:49:14,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 842 transitions. [2022-11-21 16:49:14,647 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8378109452736319 [2022-11-21 16:49:14,648 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 842 transitions. [2022-11-21 16:49:14,649 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 842 transitions. [2022-11-21 16:49:14,652 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 16:49:14,655 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 842 transitions. [2022-11-21 16:49:14,658 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 168.4) internal successors, (842), 5 states have internal predecessors, (842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:49:14,665 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 201.0) internal successors, (1206), 6 states have internal predecessors, (1206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:49:14,666 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 201.0) internal successors, (1206), 6 states have internal predecessors, (1206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:49:14,668 INFO L175 Difference]: Start difference. First operand has 175 places, 180 transitions, 369 flow. Second operand 5 states and 842 transitions. [2022-11-21 16:49:14,670 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 196 transitions, 536 flow [2022-11-21 16:49:14,674 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 196 transitions, 526 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-11-21 16:49:14,679 INFO L231 Difference]: Finished difference. Result has 175 places, 171 transitions, 399 flow [2022-11-21 16:49:14,682 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=201, PETRI_DIFFERENCE_MINUEND_FLOW=340, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=399, PETRI_PLACES=175, PETRI_TRANSITIONS=171} [2022-11-21 16:49:14,685 INFO L288 CegarLoopForPetriNet]: 175 programPoint places, 0 predicate places. [2022-11-21 16:49:14,686 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 171 transitions, 399 flow [2022-11-21 16:49:14,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 152.5) internal successors, (610), 4 states have internal predecessors, (610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:49:14,687 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:49:14,687 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:49:14,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-21 16:49:14,688 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 27 more)] === [2022-11-21 16:49:14,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:49:14,688 INFO L85 PathProgramCache]: Analyzing trace with hash -1282755979, now seen corresponding path program 1 times [2022-11-21 16:49:14,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:49:14,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508557254] [2022-11-21 16:49:14,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:49:14,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:49:14,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:49:14,911 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:49:14,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:49:14,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508557254] [2022-11-21 16:49:14,912 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508557254] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:49:14,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [601466870] [2022-11-21 16:49:14,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:49:14,913 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:49:14,913 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e068d3d-7efe-44b8-999f-5009eaf120f0/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:49:14,922 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e068d3d-7efe-44b8-999f-5009eaf120f0/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:49:14,929 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e068d3d-7efe-44b8-999f-5009eaf120f0/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-21 16:49:15,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:49:15,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-21 16:49:15,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:49:15,224 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:49:15,224 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:49:15,324 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:49:15,324 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [601466870] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:49:15,325 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:49:15,325 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2022-11-21 16:49:15,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711490792] [2022-11-21 16:49:15,326 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:49:15,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-21 16:49:15,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:49:15,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-21 16:49:15,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-11-21 16:49:15,336 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 201 [2022-11-21 16:49:15,339 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 171 transitions, 399 flow. Second operand has 12 states, 12 states have (on average 153.66666666666666) internal successors, (1844), 12 states have internal predecessors, (1844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:49:15,339 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:49:15,340 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 201 [2022-11-21 16:49:15,340 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 16:49:15,991 INFO L130 PetriNetUnfolder]: 176/1008 cut-off events. [2022-11-21 16:49:15,991 INFO L131 PetriNetUnfolder]: For 52/72 co-relation queries the response was YES. [2022-11-21 16:49:15,996 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1512 conditions, 1008 events. 176/1008 cut-off events. For 52/72 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 5466 event pairs, 120 based on Foata normal form. 6/734 useless extension candidates. Maximal degree in co-relation 996. Up to 78 conditions per place. [2022-11-21 16:49:16,002 INFO L137 encePairwiseOnDemand]: 186/201 looper letters, 111 selfloop transitions, 40 changer transitions 0/280 dead transitions. [2022-11-21 16:49:16,002 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 280 transitions, 985 flow [2022-11-21 16:49:16,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-21 16:49:16,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-11-21 16:49:16,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2875 transitions. [2022-11-21 16:49:16,011 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7946379215035931 [2022-11-21 16:49:16,011 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2875 transitions. [2022-11-21 16:49:16,011 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2875 transitions. [2022-11-21 16:49:16,013 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 16:49:16,014 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2875 transitions. [2022-11-21 16:49:16,022 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 159.72222222222223) internal successors, (2875), 18 states have internal predecessors, (2875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:49:16,030 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 201.0) internal successors, (3819), 19 states have internal predecessors, (3819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:49:16,033 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 201.0) internal successors, (3819), 19 states have internal predecessors, (3819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:49:16,034 INFO L175 Difference]: Start difference. First operand has 175 places, 171 transitions, 399 flow. Second operand 18 states and 2875 transitions. [2022-11-21 16:49:16,034 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 280 transitions, 985 flow [2022-11-21 16:49:16,037 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 280 transitions, 980 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-21 16:49:16,042 INFO L231 Difference]: Finished difference. Result has 191 places, 198 transitions, 632 flow [2022-11-21 16:49:16,043 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=201, PETRI_DIFFERENCE_MINUEND_FLOW=394, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=632, PETRI_PLACES=191, PETRI_TRANSITIONS=198} [2022-11-21 16:49:16,044 INFO L288 CegarLoopForPetriNet]: 175 programPoint places, 16 predicate places. [2022-11-21 16:49:16,044 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 198 transitions, 632 flow [2022-11-21 16:49:16,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 153.66666666666666) internal successors, (1844), 12 states have internal predecessors, (1844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:49:16,046 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:49:16,046 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:49:16,059 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e068d3d-7efe-44b8-999f-5009eaf120f0/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-21 16:49:16,258 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e068d3d-7efe-44b8-999f-5009eaf120f0/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2022-11-21 16:49:16,259 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 27 more)] === [2022-11-21 16:49:16,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:49:16,259 INFO L85 PathProgramCache]: Analyzing trace with hash -1110729080, now seen corresponding path program 1 times [2022-11-21 16:49:16,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:49:16,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254958975] [2022-11-21 16:49:16,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:49:16,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:49:16,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:49:16,562 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:49:16,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:49:16,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254958975] [2022-11-21 16:49:16,563 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [254958975] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:49:16,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1925274634] [2022-11-21 16:49:16,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:49:16,564 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:49:16,564 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e068d3d-7efe-44b8-999f-5009eaf120f0/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:49:16,566 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e068d3d-7efe-44b8-999f-5009eaf120f0/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:49:16,591 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e068d3d-7efe-44b8-999f-5009eaf120f0/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-21 16:49:16,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:49:16,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-21 16:49:16,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:49:16,783 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:49:16,783 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-21 16:49:16,784 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1925274634] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:49:16,784 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-21 16:49:16,785 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2022-11-21 16:49:16,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926749761] [2022-11-21 16:49:16,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:49:16,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-21 16:49:16,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:49:16,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-21 16:49:16,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-21 16:49:16,792 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 201 [2022-11-21 16:49:16,794 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 198 transitions, 632 flow. Second operand has 6 states, 6 states have (on average 153.33333333333334) internal successors, (920), 6 states have internal predecessors, (920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:49:16,794 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:49:16,795 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 201 [2022-11-21 16:49:16,795 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 16:49:17,173 INFO L130 PetriNetUnfolder]: 176/1000 cut-off events. [2022-11-21 16:49:17,173 INFO L131 PetriNetUnfolder]: For 146/166 co-relation queries the response was YES. [2022-11-21 16:49:17,176 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1549 conditions, 1000 events. 176/1000 cut-off events. For 146/166 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 5407 event pairs, 120 based on Foata normal form. 8/728 useless extension candidates. Maximal degree in co-relation 1211. Up to 268 conditions per place. [2022-11-21 16:49:17,181 INFO L137 encePairwiseOnDemand]: 190/201 looper letters, 55 selfloop transitions, 27 changer transitions 0/211 dead transitions. [2022-11-21 16:49:17,181 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 211 transitions, 792 flow [2022-11-21 16:49:17,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-21 16:49:17,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-21 16:49:17,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1120 transitions. [2022-11-21 16:49:17,185 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7960199004975125 [2022-11-21 16:49:17,185 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1120 transitions. [2022-11-21 16:49:17,185 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1120 transitions. [2022-11-21 16:49:17,186 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 16:49:17,186 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1120 transitions. [2022-11-21 16:49:17,189 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 160.0) internal successors, (1120), 7 states have internal predecessors, (1120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:49:17,192 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 201.0) internal successors, (1608), 8 states have internal predecessors, (1608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:49:17,193 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 201.0) internal successors, (1608), 8 states have internal predecessors, (1608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:49:17,193 INFO L175 Difference]: Start difference. First operand has 191 places, 198 transitions, 632 flow. Second operand 7 states and 1120 transitions. [2022-11-21 16:49:17,193 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 211 transitions, 792 flow [2022-11-21 16:49:17,197 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 211 transitions, 718 flow, removed 26 selfloop flow, removed 5 redundant places. [2022-11-21 16:49:17,201 INFO L231 Difference]: Finished difference. Result has 186 places, 190 transitions, 558 flow [2022-11-21 16:49:17,202 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=201, PETRI_DIFFERENCE_MINUEND_FLOW=504, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=558, PETRI_PLACES=186, PETRI_TRANSITIONS=190} [2022-11-21 16:49:17,202 INFO L288 CegarLoopForPetriNet]: 175 programPoint places, 11 predicate places. [2022-11-21 16:49:17,203 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 190 transitions, 558 flow [2022-11-21 16:49:17,203 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 153.33333333333334) internal successors, (920), 6 states have internal predecessors, (920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:49:17,204 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:49:17,204 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, 1, 1, 1, 1] [2022-11-21 16:49:17,214 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e068d3d-7efe-44b8-999f-5009eaf120f0/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-21 16:49:17,409 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e068d3d-7efe-44b8-999f-5009eaf120f0/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:49:17,410 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 27 more)] === [2022-11-21 16:49:17,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:49:17,410 INFO L85 PathProgramCache]: Analyzing trace with hash -473429406, now seen corresponding path program 1 times [2022-11-21 16:49:17,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:49:17,411 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931190282] [2022-11-21 16:49:17,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:49:17,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:49:17,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:49:17,667 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:49:17,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:49:17,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931190282] [2022-11-21 16:49:17,672 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1931190282] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:49:17,672 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:49:17,673 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-21 16:49:17,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568764406] [2022-11-21 16:49:17,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:49:17,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-21 16:49:17,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:49:17,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-21 16:49:17,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-21 16:49:17,680 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 149 out of 201 [2022-11-21 16:49:17,681 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 190 transitions, 558 flow. Second operand has 6 states, 6 states have (on average 152.33333333333334) internal successors, (914), 6 states have internal predecessors, (914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:49:17,681 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:49:17,681 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 149 of 201 [2022-11-21 16:49:17,682 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 16:49:17,936 INFO L130 PetriNetUnfolder]: 144/880 cut-off events. [2022-11-21 16:49:17,937 INFO L131 PetriNetUnfolder]: For 138/154 co-relation queries the response was YES. [2022-11-21 16:49:17,939 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1346 conditions, 880 events. 144/880 cut-off events. For 138/154 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 4536 event pairs, 98 based on Foata normal form. 6/654 useless extension candidates. Maximal degree in co-relation 1024. Up to 261 conditions per place. [2022-11-21 16:49:17,943 INFO L137 encePairwiseOnDemand]: 190/201 looper letters, 57 selfloop transitions, 7 changer transitions 1/198 dead transitions. [2022-11-21 16:49:17,943 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 198 transitions, 708 flow [2022-11-21 16:49:17,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-21 16:49:17,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-21 16:49:17,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1094 transitions. [2022-11-21 16:49:17,947 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7775408670931059 [2022-11-21 16:49:17,947 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1094 transitions. [2022-11-21 16:49:17,947 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1094 transitions. [2022-11-21 16:49:17,948 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 16:49:17,948 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1094 transitions. [2022-11-21 16:49:17,951 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 156.28571428571428) internal successors, (1094), 7 states have internal predecessors, (1094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:49:17,954 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 201.0) internal successors, (1608), 8 states have internal predecessors, (1608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:49:17,955 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 201.0) internal successors, (1608), 8 states have internal predecessors, (1608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:49:17,955 INFO L175 Difference]: Start difference. First operand has 186 places, 190 transitions, 558 flow. Second operand 7 states and 1094 transitions. [2022-11-21 16:49:17,955 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 198 transitions, 708 flow [2022-11-21 16:49:17,959 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 198 transitions, 674 flow, removed 0 selfloop flow, removed 5 redundant places. [2022-11-21 16:49:17,963 INFO L231 Difference]: Finished difference. Result has 189 places, 191 transitions, 554 flow [2022-11-21 16:49:17,964 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=201, PETRI_DIFFERENCE_MINUEND_FLOW=524, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=554, PETRI_PLACES=189, PETRI_TRANSITIONS=191} [2022-11-21 16:49:17,966 INFO L288 CegarLoopForPetriNet]: 175 programPoint places, 14 predicate places. [2022-11-21 16:49:17,966 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 191 transitions, 554 flow [2022-11-21 16:49:17,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 152.33333333333334) internal successors, (914), 6 states have internal predecessors, (914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:49:17,967 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:49:17,967 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:49:17,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-21 16:49:17,968 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 27 more)] === [2022-11-21 16:49:17,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:49:17,968 INFO L85 PathProgramCache]: Analyzing trace with hash -361310530, now seen corresponding path program 2 times [2022-11-21 16:49:17,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:49:17,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270597207] [2022-11-21 16:49:17,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:49:17,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:49:18,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:49:18,262 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:49:18,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:49:18,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270597207] [2022-11-21 16:49:18,262 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270597207] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:49:18,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [773249600] [2022-11-21 16:49:18,263 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-21 16:49:18,263 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:49:18,263 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e068d3d-7efe-44b8-999f-5009eaf120f0/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:49:18,267 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e068d3d-7efe-44b8-999f-5009eaf120f0/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:49:18,297 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e068d3d-7efe-44b8-999f-5009eaf120f0/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-21 16:49:18,370 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-21 16:49:18,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:49:18,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-21 16:49:18,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:49:18,598 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-11-21 16:49:18,599 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:49:18,835 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-11-21 16:49:18,835 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [773249600] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:49:18,835 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:49:18,836 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 7] total 17 [2022-11-21 16:49:18,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599010725] [2022-11-21 16:49:18,836 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:49:18,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-21 16:49:18,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:49:18,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-21 16:49:18,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2022-11-21 16:49:18,843 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 201 [2022-11-21 16:49:18,848 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 191 transitions, 554 flow. Second operand has 18 states, 18 states have (on average 139.61111111111111) internal successors, (2513), 18 states have internal predecessors, (2513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:49:18,849 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:49:18,849 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 201 [2022-11-21 16:49:18,849 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 16:49:20,384 INFO L130 PetriNetUnfolder]: 147/1033 cut-off events. [2022-11-21 16:49:20,384 INFO L131 PetriNetUnfolder]: For 182/200 co-relation queries the response was YES. [2022-11-21 16:49:20,388 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1709 conditions, 1033 events. 147/1033 cut-off events. For 182/200 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 5267 event pairs, 91 based on Foata normal form. 4/823 useless extension candidates. Maximal degree in co-relation 1290. Up to 121 conditions per place. [2022-11-21 16:49:20,392 INFO L137 encePairwiseOnDemand]: 179/201 looper letters, 126 selfloop transitions, 64 changer transitions 5/309 dead transitions. [2022-11-21 16:49:20,392 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 309 transitions, 1316 flow [2022-11-21 16:49:20,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-11-21 16:49:20,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2022-11-21 16:49:20,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 6876 transitions. [2022-11-21 16:49:20,408 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.698141943344502 [2022-11-21 16:49:20,408 INFO L72 ComplementDD]: Start complementDD. Operand 49 states and 6876 transitions. [2022-11-21 16:49:20,408 INFO L73 IsDeterministic]: Start isDeterministic. Operand 49 states and 6876 transitions. [2022-11-21 16:49:20,413 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 16:49:20,414 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 49 states and 6876 transitions. [2022-11-21 16:49:20,430 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 50 states, 49 states have (on average 140.3265306122449) internal successors, (6876), 49 states have internal predecessors, (6876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:49:20,449 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 50 states, 50 states have (on average 201.0) internal successors, (10050), 50 states have internal predecessors, (10050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:49:20,454 INFO L81 ComplementDD]: Finished complementDD. Result has 50 states, 50 states have (on average 201.0) internal successors, (10050), 50 states have internal predecessors, (10050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:49:20,454 INFO L175 Difference]: Start difference. First operand has 189 places, 191 transitions, 554 flow. Second operand 49 states and 6876 transitions. [2022-11-21 16:49:20,454 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 309 transitions, 1316 flow [2022-11-21 16:49:20,458 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 309 transitions, 1294 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-11-21 16:49:20,462 INFO L231 Difference]: Finished difference. Result has 234 places, 212 transitions, 789 flow [2022-11-21 16:49:20,463 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=201, PETRI_DIFFERENCE_MINUEND_FLOW=530, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=789, PETRI_PLACES=234, PETRI_TRANSITIONS=212} [2022-11-21 16:49:20,464 INFO L288 CegarLoopForPetriNet]: 175 programPoint places, 59 predicate places. [2022-11-21 16:49:20,464 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 212 transitions, 789 flow [2022-11-21 16:49:20,465 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 139.61111111111111) internal successors, (2513), 18 states have internal predecessors, (2513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:49:20,465 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:49:20,465 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:49:20,476 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e068d3d-7efe-44b8-999f-5009eaf120f0/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-21 16:49:20,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e068d3d-7efe-44b8-999f-5009eaf120f0/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:49:20,671 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 27 more)] === [2022-11-21 16:49:20,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:49:20,671 INFO L85 PathProgramCache]: Analyzing trace with hash 1366614082, now seen corresponding path program 1 times [2022-11-21 16:49:20,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:49:20,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007606169] [2022-11-21 16:49:20,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:49:20,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:49:20,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:49:20,960 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:49:20,960 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:49:20,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007606169] [2022-11-21 16:49:20,963 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2007606169] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:49:20,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1813705095] [2022-11-21 16:49:20,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:49:20,963 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:49:20,964 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e068d3d-7efe-44b8-999f-5009eaf120f0/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:49:20,965 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e068d3d-7efe-44b8-999f-5009eaf120f0/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:49:20,987 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e068d3d-7efe-44b8-999f-5009eaf120f0/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-21 16:49:21,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:49:21,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-21 16:49:21,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:49:21,258 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-21 16:49:21,258 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-21 16:49:21,259 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1813705095] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:49:21,259 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-21 16:49:21,259 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 9 [2022-11-21 16:49:21,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175485640] [2022-11-21 16:49:21,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:49:21,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-21 16:49:21,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:49:21,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-21 16:49:21,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-11-21 16:49:21,263 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 201 [2022-11-21 16:49:21,264 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 212 transitions, 789 flow. Second operand has 4 states, 4 states have (on average 171.0) internal successors, (684), 4 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:49:21,264 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:49:21,264 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 201 [2022-11-21 16:49:21,264 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 16:49:21,433 INFO L130 PetriNetUnfolder]: 98/862 cut-off events. [2022-11-21 16:49:21,433 INFO L131 PetriNetUnfolder]: For 205/217 co-relation queries the response was YES. [2022-11-21 16:49:21,435 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1301 conditions, 862 events. 98/862 cut-off events. For 205/217 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 3903 event pairs, 48 based on Foata normal form. 0/742 useless extension candidates. Maximal degree in co-relation 1109. Up to 148 conditions per place. [2022-11-21 16:49:21,438 INFO L137 encePairwiseOnDemand]: 196/201 looper letters, 16 selfloop transitions, 3 changer transitions 0/210 dead transitions. [2022-11-21 16:49:21,439 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 210 transitions, 819 flow [2022-11-21 16:49:21,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-21 16:49:21,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-21 16:49:21,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 691 transitions. [2022-11-21 16:49:21,441 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8594527363184079 [2022-11-21 16:49:21,441 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 691 transitions. [2022-11-21 16:49:21,441 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 691 transitions. [2022-11-21 16:49:21,442 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 16:49:21,442 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 691 transitions. [2022-11-21 16:49:21,444 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 172.75) internal successors, (691), 4 states have internal predecessors, (691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:49:21,445 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 201.0) internal successors, (1005), 5 states have internal predecessors, (1005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:49:21,446 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 201.0) internal successors, (1005), 5 states have internal predecessors, (1005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:49:21,446 INFO L175 Difference]: Start difference. First operand has 234 places, 212 transitions, 789 flow. Second operand 4 states and 691 transitions. [2022-11-21 16:49:21,446 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 210 transitions, 819 flow [2022-11-21 16:49:21,450 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 210 transitions, 720 flow, removed 15 selfloop flow, removed 17 redundant places. [2022-11-21 16:49:21,458 INFO L231 Difference]: Finished difference. Result has 217 places, 210 transitions, 688 flow [2022-11-21 16:49:21,458 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=201, PETRI_DIFFERENCE_MINUEND_FLOW=682, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=688, PETRI_PLACES=217, PETRI_TRANSITIONS=210} [2022-11-21 16:49:21,461 INFO L288 CegarLoopForPetriNet]: 175 programPoint places, 42 predicate places. [2022-11-21 16:49:21,462 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 210 transitions, 688 flow [2022-11-21 16:49:21,462 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 171.0) internal successors, (684), 4 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:49:21,462 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:49:21,462 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:49:21,476 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e068d3d-7efe-44b8-999f-5009eaf120f0/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-11-21 16:49:21,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e068d3d-7efe-44b8-999f-5009eaf120f0/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-21 16:49:21,668 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 27 more)] === [2022-11-21 16:49:21,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:49:21,669 INFO L85 PathProgramCache]: Analyzing trace with hash 805821157, now seen corresponding path program 1 times [2022-11-21 16:49:21,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:49:21,669 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583454039] [2022-11-21 16:49:21,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:49:21,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:49:21,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:49:21,881 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-21 16:49:21,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:49:21,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583454039] [2022-11-21 16:49:21,882 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [583454039] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:49:21,882 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:49:21,882 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 16:49:21,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485845891] [2022-11-21 16:49:21,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:49:21,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 16:49:21,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:49:21,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 16:49:21,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 16:49:21,885 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 171 out of 201 [2022-11-21 16:49:21,886 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 210 transitions, 688 flow. Second operand has 3 states, 3 states have (on average 173.33333333333334) internal successors, (520), 3 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:49:21,886 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:49:21,887 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 171 of 201 [2022-11-21 16:49:21,887 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 16:49:22,082 INFO L130 PetriNetUnfolder]: 80/850 cut-off events. [2022-11-21 16:49:22,082 INFO L131 PetriNetUnfolder]: For 126/132 co-relation queries the response was YES. [2022-11-21 16:49:22,084 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1224 conditions, 850 events. 80/850 cut-off events. For 126/132 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 3811 event pairs, 12 based on Foata normal form. 12/754 useless extension candidates. Maximal degree in co-relation 1169. Up to 106 conditions per place. [2022-11-21 16:49:22,087 INFO L137 encePairwiseOnDemand]: 198/201 looper letters, 12 selfloop transitions, 2 changer transitions 0/213 dead transitions. [2022-11-21 16:49:22,087 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 213 transitions, 725 flow [2022-11-21 16:49:22,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 16:49:22,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-21 16:49:22,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 528 transitions. [2022-11-21 16:49:22,090 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8756218905472637 [2022-11-21 16:49:22,090 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 528 transitions. [2022-11-21 16:49:22,090 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 528 transitions. [2022-11-21 16:49:22,091 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 16:49:22,091 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 528 transitions. [2022-11-21 16:49:22,092 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 176.0) internal successors, (528), 3 states have internal predecessors, (528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:49:22,094 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 201.0) internal successors, (804), 4 states have internal predecessors, (804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:49:22,095 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 201.0) internal successors, (804), 4 states have internal predecessors, (804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:49:22,104 INFO L175 Difference]: Start difference. First operand has 217 places, 210 transitions, 688 flow. Second operand 3 states and 528 transitions. [2022-11-21 16:49:22,105 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 213 transitions, 725 flow [2022-11-21 16:49:22,108 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 213 transitions, 719 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-11-21 16:49:22,112 INFO L231 Difference]: Finished difference. Result has 217 places, 211 transitions, 694 flow [2022-11-21 16:49:22,112 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=201, PETRI_DIFFERENCE_MINUEND_FLOW=682, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=208, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=694, PETRI_PLACES=217, PETRI_TRANSITIONS=211} [2022-11-21 16:49:22,114 INFO L288 CegarLoopForPetriNet]: 175 programPoint places, 42 predicate places. [2022-11-21 16:49:22,114 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 211 transitions, 694 flow [2022-11-21 16:49:22,114 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 173.33333333333334) internal successors, (520), 3 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:49:22,115 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:49:22,115 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:49:22,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-21 16:49:22,115 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 27 more)] === [2022-11-21 16:49:22,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:49:22,116 INFO L85 PathProgramCache]: Analyzing trace with hash 483079782, now seen corresponding path program 1 times [2022-11-21 16:49:22,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:49:22,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48206047] [2022-11-21 16:49:22,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:49:22,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:49:22,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:49:22,312 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-21 16:49:22,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:49:22,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48206047] [2022-11-21 16:49:22,313 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48206047] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:49:22,313 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:49:22,313 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-21 16:49:22,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549165701] [2022-11-21 16:49:22,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:49:22,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-21 16:49:22,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:49:22,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-21 16:49:22,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-21 16:49:22,318 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 149 out of 201 [2022-11-21 16:49:22,328 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 211 transitions, 694 flow. Second operand has 6 states, 6 states have (on average 153.33333333333334) internal successors, (920), 6 states have internal predecessors, (920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:49:22,329 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:49:22,329 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 149 of 201 [2022-11-21 16:49:22,329 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 16:49:22,692 INFO L130 PetriNetUnfolder]: 86/1128 cut-off events. [2022-11-21 16:49:22,693 INFO L131 PetriNetUnfolder]: For 372/396 co-relation queries the response was YES. [2022-11-21 16:49:22,695 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1847 conditions, 1128 events. 86/1128 cut-off events. For 372/396 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 5985 event pairs, 42 based on Foata normal form. 18/1014 useless extension candidates. Maximal degree in co-relation 1554. Up to 185 conditions per place. [2022-11-21 16:49:22,698 INFO L137 encePairwiseOnDemand]: 191/201 looper letters, 77 selfloop transitions, 21 changer transitions 10/245 dead transitions. [2022-11-21 16:49:22,699 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 245 transitions, 1054 flow [2022-11-21 16:49:22,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-21 16:49:22,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-21 16:49:22,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1396 transitions. [2022-11-21 16:49:22,706 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7716970702045329 [2022-11-21 16:49:22,707 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1396 transitions. [2022-11-21 16:49:22,707 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1396 transitions. [2022-11-21 16:49:22,709 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 16:49:22,709 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1396 transitions. [2022-11-21 16:49:22,716 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 155.11111111111111) internal successors, (1396), 9 states have internal predecessors, (1396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:49:22,719 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 201.0) internal successors, (2010), 10 states have internal predecessors, (2010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:49:22,720 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 201.0) internal successors, (2010), 10 states have internal predecessors, (2010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:49:22,721 INFO L175 Difference]: Start difference. First operand has 217 places, 211 transitions, 694 flow. Second operand 9 states and 1396 transitions. [2022-11-21 16:49:22,721 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 245 transitions, 1054 flow [2022-11-21 16:49:22,726 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 245 transitions, 1052 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-21 16:49:22,730 INFO L231 Difference]: Finished difference. Result has 226 places, 212 transitions, 746 flow [2022-11-21 16:49:22,731 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=201, PETRI_DIFFERENCE_MINUEND_FLOW=692, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=211, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=746, PETRI_PLACES=226, PETRI_TRANSITIONS=212} [2022-11-21 16:49:22,734 INFO L288 CegarLoopForPetriNet]: 175 programPoint places, 51 predicate places. [2022-11-21 16:49:22,734 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 212 transitions, 746 flow [2022-11-21 16:49:22,735 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 153.33333333333334) internal successors, (920), 6 states have internal predecessors, (920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:49:22,735 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:49:22,735 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:49:22,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-21 16:49:22,737 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 27 more)] === [2022-11-21 16:49:22,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:49:22,738 INFO L85 PathProgramCache]: Analyzing trace with hash 369592719, now seen corresponding path program 1 times [2022-11-21 16:49:22,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:49:22,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798106717] [2022-11-21 16:49:22,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:49:22,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:49:22,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:49:23,029 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-21 16:49:23,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:49:23,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798106717] [2022-11-21 16:49:23,030 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1798106717] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:49:23,031 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:49:23,031 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 16:49:23,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171386780] [2022-11-21 16:49:23,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:49:23,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 16:49:23,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:49:23,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 16:49:23,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 16:49:23,033 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 171 out of 201 [2022-11-21 16:49:23,034 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 212 transitions, 746 flow. Second operand has 3 states, 3 states have (on average 173.66666666666666) internal successors, (521), 3 states have internal predecessors, (521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:49:23,034 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:49:23,034 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 171 of 201 [2022-11-21 16:49:23,035 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 16:49:23,271 INFO L130 PetriNetUnfolder]: 74/1206 cut-off events. [2022-11-21 16:49:23,271 INFO L131 PetriNetUnfolder]: For 330/342 co-relation queries the response was YES. [2022-11-21 16:49:23,274 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1822 conditions, 1206 events. 74/1206 cut-off events. For 330/342 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 6664 event pairs, 18 based on Foata normal form. 12/1092 useless extension candidates. Maximal degree in co-relation 1529. Up to 124 conditions per place. [2022-11-21 16:49:23,277 INFO L137 encePairwiseOnDemand]: 198/201 looper letters, 13 selfloop transitions, 2 changer transitions 1/216 dead transitions. [2022-11-21 16:49:23,278 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 216 transitions, 795 flow [2022-11-21 16:49:23,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 16:49:23,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-21 16:49:23,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 529 transitions. [2022-11-21 16:49:23,280 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8772802653399668 [2022-11-21 16:49:23,280 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 529 transitions. [2022-11-21 16:49:23,280 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 529 transitions. [2022-11-21 16:49:23,281 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 16:49:23,281 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 529 transitions. [2022-11-21 16:49:23,282 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 176.33333333333334) internal successors, (529), 3 states have internal predecessors, (529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:49:23,283 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 201.0) internal successors, (804), 4 states have internal predecessors, (804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:49:23,284 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 201.0) internal successors, (804), 4 states have internal predecessors, (804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:49:23,284 INFO L175 Difference]: Start difference. First operand has 226 places, 212 transitions, 746 flow. Second operand 3 states and 529 transitions. [2022-11-21 16:49:23,284 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 216 transitions, 795 flow [2022-11-21 16:49:23,289 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 216 transitions, 770 flow, removed 0 selfloop flow, removed 5 redundant places. [2022-11-21 16:49:23,292 INFO L231 Difference]: Finished difference. Result has 224 places, 213 transitions, 735 flow [2022-11-21 16:49:23,293 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=201, PETRI_DIFFERENCE_MINUEND_FLOW=721, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=212, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=735, PETRI_PLACES=224, PETRI_TRANSITIONS=213} [2022-11-21 16:49:23,294 INFO L288 CegarLoopForPetriNet]: 175 programPoint places, 49 predicate places. [2022-11-21 16:49:23,294 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 213 transitions, 735 flow [2022-11-21 16:49:23,295 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 173.66666666666666) internal successors, (521), 3 states have internal predecessors, (521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:49:23,295 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:49:23,295 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:49:23,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-21 16:49:23,296 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 27 more)] === [2022-11-21 16:49:23,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:49:23,296 INFO L85 PathProgramCache]: Analyzing trace with hash -1348008447, now seen corresponding path program 1 times [2022-11-21 16:49:23,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:49:23,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832346343] [2022-11-21 16:49:23,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:49:23,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:49:23,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:49:24,728 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-21 16:49:24,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:49:24,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832346343] [2022-11-21 16:49:24,728 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832346343] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:49:24,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [562370934] [2022-11-21 16:49:24,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:49:24,729 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:49:24,729 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e068d3d-7efe-44b8-999f-5009eaf120f0/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:49:24,730 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e068d3d-7efe-44b8-999f-5009eaf120f0/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:49:24,750 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e068d3d-7efe-44b8-999f-5009eaf120f0/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-21 16:49:24,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:49:24,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-21 16:49:24,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:49:26,284 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 19 treesize of output 7 [2022-11-21 16:49:26,349 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-21 16:49:26,350 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:49:26,478 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-21 16:49:26,478 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 24 treesize of output 20 [2022-11-21 16:49:28,144 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-21 16:49:28,145 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [562370934] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:49:28,145 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:49:28,145 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 12] total 44 [2022-11-21 16:49:28,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033314590] [2022-11-21 16:49:28,146 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:49:28,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-11-21 16:49:28,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:49:28,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-11-21 16:49:28,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=315, Invalid=1665, Unknown=0, NotChecked=0, Total=1980 [2022-11-21 16:49:28,154 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 201 [2022-11-21 16:49:28,159 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 213 transitions, 735 flow. Second operand has 45 states, 45 states have (on average 103.06666666666666) internal successors, (4638), 45 states have internal predecessors, (4638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:49:28,159 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:49:28,160 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 201 [2022-11-21 16:49:28,160 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 16:49:35,786 INFO L130 PetriNetUnfolder]: 6908/14738 cut-off events. [2022-11-21 16:49:35,786 INFO L131 PetriNetUnfolder]: For 3926/3926 co-relation queries the response was YES. [2022-11-21 16:49:35,849 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31613 conditions, 14738 events. 6908/14738 cut-off events. For 3926/3926 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 122565 event pairs, 774 based on Foata normal form. 0/12422 useless extension candidates. Maximal degree in co-relation 26351. Up to 2202 conditions per place. [2022-11-21 16:49:35,932 INFO L137 encePairwiseOnDemand]: 169/201 looper letters, 332 selfloop transitions, 129 changer transitions 14/553 dead transitions. [2022-11-21 16:49:35,932 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 289 places, 553 transitions, 2714 flow [2022-11-21 16:49:35,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-11-21 16:49:35,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2022-11-21 16:49:35,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 6950 transitions. [2022-11-21 16:49:35,951 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5238956731494044 [2022-11-21 16:49:35,951 INFO L72 ComplementDD]: Start complementDD. Operand 66 states and 6950 transitions. [2022-11-21 16:49:35,951 INFO L73 IsDeterministic]: Start isDeterministic. Operand 66 states and 6950 transitions. [2022-11-21 16:49:35,958 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 16:49:35,959 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 66 states and 6950 transitions. [2022-11-21 16:49:35,974 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 67 states, 66 states have (on average 105.3030303030303) internal successors, (6950), 66 states have internal predecessors, (6950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:49:35,996 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 67 states, 67 states have (on average 201.0) internal successors, (13467), 67 states have internal predecessors, (13467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:49:36,002 INFO L81 ComplementDD]: Finished complementDD. Result has 67 states, 67 states have (on average 201.0) internal successors, (13467), 67 states have internal predecessors, (13467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:49:36,002 INFO L175 Difference]: Start difference. First operand has 224 places, 213 transitions, 735 flow. Second operand 66 states and 6950 transitions. [2022-11-21 16:49:36,002 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 289 places, 553 transitions, 2714 flow [2022-11-21 16:49:36,012 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 553 transitions, 2635 flow, removed 37 selfloop flow, removed 2 redundant places. [2022-11-21 16:49:36,021 INFO L231 Difference]: Finished difference. Result has 304 places, 324 transitions, 1507 flow [2022-11-21 16:49:36,023 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=201, PETRI_DIFFERENCE_MINUEND_FLOW=727, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=66, PETRI_FLOW=1507, PETRI_PLACES=304, PETRI_TRANSITIONS=324} [2022-11-21 16:49:36,024 INFO L288 CegarLoopForPetriNet]: 175 programPoint places, 129 predicate places. [2022-11-21 16:49:36,024 INFO L495 AbstractCegarLoop]: Abstraction has has 304 places, 324 transitions, 1507 flow [2022-11-21 16:49:36,026 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 103.06666666666666) internal successors, (4638), 45 states have internal predecessors, (4638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:49:36,026 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:49:36,026 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:49:36,038 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e068d3d-7efe-44b8-999f-5009eaf120f0/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-21 16:49:36,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e068d3d-7efe-44b8-999f-5009eaf120f0/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-21 16:49:36,233 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 27 more)] === [2022-11-21 16:49:36,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:49:36,234 INFO L85 PathProgramCache]: Analyzing trace with hash -1347990573, now seen corresponding path program 1 times [2022-11-21 16:49:36,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:49:36,234 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196432996] [2022-11-21 16:49:36,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:49:36,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:49:36,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:49:37,787 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-21 16:49:37,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:49:37,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196432996] [2022-11-21 16:49:37,788 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1196432996] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:49:37,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1900664468] [2022-11-21 16:49:37,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:49:37,789 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:49:37,789 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e068d3d-7efe-44b8-999f-5009eaf120f0/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:49:37,791 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e068d3d-7efe-44b8-999f-5009eaf120f0/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:49:37,797 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e068d3d-7efe-44b8-999f-5009eaf120f0/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-21 16:49:37,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:49:37,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 39 conjunts are in the unsatisfiable core [2022-11-21 16:49:37,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:49:39,144 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 [2022-11-21 16:49:39,682 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 [2022-11-21 16:49:39,797 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 [2022-11-21 16:49:39,940 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 23 treesize of output 7 [2022-11-21 16:49:39,998 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-21 16:49:39,998 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:49:41,430 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-21 16:49:41,430 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 60 treesize of output 48 [2022-11-21 16:49:41,443 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-21 16:49:41,444 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 140 treesize of output 136 [2022-11-21 16:49:41,456 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-21 16:49:41,457 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 124 treesize of output 112 [2022-11-21 16:49:41,470 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-21 16:49:41,471 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 79 treesize of output 79 [2022-11-21 16:49:42,787 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-21 16:49:42,788 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1900664468] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:49:42,788 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:49:42,788 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 21, 18] total 55 [2022-11-21 16:49:42,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106614567] [2022-11-21 16:49:42,791 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:49:42,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-11-21 16:49:42,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:49:42,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-11-21 16:49:42,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=462, Invalid=2596, Unknown=22, NotChecked=0, Total=3080 [2022-11-21 16:49:42,800 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 201 [2022-11-21 16:49:42,805 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 304 places, 324 transitions, 1507 flow. Second operand has 56 states, 56 states have (on average 95.42857142857143) internal successors, (5344), 56 states have internal predecessors, (5344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:49:42,805 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:49:42,805 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 201 [2022-11-21 16:49:42,805 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 16:49:56,398 INFO L130 PetriNetUnfolder]: 15308/31619 cut-off events. [2022-11-21 16:49:56,398 INFO L131 PetriNetUnfolder]: For 51764/52002 co-relation queries the response was YES. [2022-11-21 16:49:56,547 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86022 conditions, 31619 events. 15308/31619 cut-off events. For 51764/52002 co-relation queries the response was YES. Maximal size of possible extension queue 629. Compared 300592 event pairs, 1716 based on Foata normal form. 152/27399 useless extension candidates. Maximal degree in co-relation 80434. Up to 5536 conditions per place. [2022-11-21 16:49:56,824 INFO L137 encePairwiseOnDemand]: 168/201 looper letters, 528 selfloop transitions, 299 changer transitions 12/934 dead transitions. [2022-11-21 16:49:56,824 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 364 places, 934 transitions, 6138 flow [2022-11-21 16:49:56,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-11-21 16:49:56,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2022-11-21 16:49:56,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 6042 transitions. [2022-11-21 16:49:56,835 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.49278199168093956 [2022-11-21 16:49:56,835 INFO L72 ComplementDD]: Start complementDD. Operand 61 states and 6042 transitions. [2022-11-21 16:49:56,836 INFO L73 IsDeterministic]: Start isDeterministic. Operand 61 states and 6042 transitions. [2022-11-21 16:49:56,838 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 16:49:56,838 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 61 states and 6042 transitions. [2022-11-21 16:49:56,847 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 62 states, 61 states have (on average 99.04918032786885) internal successors, (6042), 61 states have internal predecessors, (6042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:49:56,864 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 62 states, 62 states have (on average 201.0) internal successors, (12462), 62 states have internal predecessors, (12462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:49:56,868 INFO L81 ComplementDD]: Finished complementDD. Result has 62 states, 62 states have (on average 201.0) internal successors, (12462), 62 states have internal predecessors, (12462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:49:56,869 INFO L175 Difference]: Start difference. First operand has 304 places, 324 transitions, 1507 flow. Second operand 61 states and 6042 transitions. [2022-11-21 16:49:56,869 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 364 places, 934 transitions, 6138 flow [2022-11-21 16:49:57,398 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 348 places, 934 transitions, 5629 flow, removed 220 selfloop flow, removed 16 redundant places. [2022-11-21 16:49:57,410 INFO L231 Difference]: Finished difference. Result has 366 places, 592 transitions, 3748 flow [2022-11-21 16:49:57,410 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=201, PETRI_DIFFERENCE_MINUEND_FLOW=1350, PETRI_DIFFERENCE_MINUEND_PLACES=288, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=324, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=233, PETRI_DIFFERENCE_SUBTRAHEND_STATES=61, PETRI_FLOW=3748, PETRI_PLACES=366, PETRI_TRANSITIONS=592} [2022-11-21 16:49:57,411 INFO L288 CegarLoopForPetriNet]: 175 programPoint places, 191 predicate places. [2022-11-21 16:49:57,411 INFO L495 AbstractCegarLoop]: Abstraction has has 366 places, 592 transitions, 3748 flow [2022-11-21 16:49:57,412 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 95.42857142857143) internal successors, (5344), 56 states have internal predecessors, (5344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:49:57,413 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:49:57,413 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:49:57,430 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e068d3d-7efe-44b8-999f-5009eaf120f0/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-21 16:49:57,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e068d3d-7efe-44b8-999f-5009eaf120f0/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:49:57,620 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 27 more)] === [2022-11-21 16:49:57,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:49:57,620 INFO L85 PathProgramCache]: Analyzing trace with hash -1088112437, now seen corresponding path program 2 times [2022-11-21 16:49:57,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:49:57,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654889772] [2022-11-21 16:49:57,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:49:57,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:49:57,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:49:59,169 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-21 16:49:59,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:49:59,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654889772] [2022-11-21 16:49:59,170 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654889772] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:49:59,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [439674469] [2022-11-21 16:49:59,170 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-21 16:49:59,170 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:49:59,171 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e068d3d-7efe-44b8-999f-5009eaf120f0/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:49:59,172 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e068d3d-7efe-44b8-999f-5009eaf120f0/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:49:59,195 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e068d3d-7efe-44b8-999f-5009eaf120f0/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-21 16:49:59,460 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-21 16:49:59,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:49:59,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-21 16:49:59,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:50:00,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 16:50:00,450 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 [2022-11-21 16:50:00,492 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 23 treesize of output 7 [2022-11-21 16:50:00,549 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-21 16:50:00,549 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-21 16:50:00,549 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [439674469] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:50:00,550 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-21 16:50:00,550 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [19] total 31 [2022-11-21 16:50:00,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981736625] [2022-11-21 16:50:00,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:50:00,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-21 16:50:00,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:50:00,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-21 16:50:00,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=881, Unknown=0, NotChecked=0, Total=992 [2022-11-21 16:50:00,554 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 124 out of 201 [2022-11-21 16:50:00,557 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 366 places, 592 transitions, 3748 flow. Second operand has 14 states, 14 states have (on average 127.0) internal successors, (1778), 14 states have internal predecessors, (1778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:50:00,557 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:50:00,557 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 124 of 201 [2022-11-21 16:50:00,557 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 16:50:12,325 INFO L130 PetriNetUnfolder]: 20003/41948 cut-off events. [2022-11-21 16:50:12,325 INFO L131 PetriNetUnfolder]: For 126238/126818 co-relation queries the response was YES. [2022-11-21 16:50:12,584 INFO L83 FinitePrefix]: Finished finitePrefix Result has 136124 conditions, 41948 events. 20003/41948 cut-off events. For 126238/126818 co-relation queries the response was YES. Maximal size of possible extension queue 753. Compared 417803 event pairs, 2396 based on Foata normal form. 838/39480 useless extension candidates. Maximal degree in co-relation 127407. Up to 15235 conditions per place. [2022-11-21 16:50:12,791 INFO L137 encePairwiseOnDemand]: 176/201 looper letters, 383 selfloop transitions, 213 changer transitions 5/772 dead transitions. [2022-11-21 16:50:12,791 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 386 places, 772 transitions, 6074 flow [2022-11-21 16:50:12,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-21 16:50:12,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-21 16:50:12,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 2746 transitions. [2022-11-21 16:50:12,804 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6505567401089789 [2022-11-21 16:50:12,805 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 2746 transitions. [2022-11-21 16:50:12,805 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 2746 transitions. [2022-11-21 16:50:12,806 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 16:50:12,806 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 2746 transitions. [2022-11-21 16:50:12,812 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 130.76190476190476) internal successors, (2746), 21 states have internal predecessors, (2746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:50:12,819 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 201.0) internal successors, (4422), 22 states have internal predecessors, (4422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:50:12,821 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 201.0) internal successors, (4422), 22 states have internal predecessors, (4422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:50:12,822 INFO L175 Difference]: Start difference. First operand has 366 places, 592 transitions, 3748 flow. Second operand 21 states and 2746 transitions. [2022-11-21 16:50:12,822 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 386 places, 772 transitions, 6074 flow [2022-11-21 16:50:14,916 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 368 places, 772 transitions, 5741 flow, removed 141 selfloop flow, removed 18 redundant places. [2022-11-21 16:50:14,927 INFO L231 Difference]: Finished difference. Result has 376 places, 639 transitions, 4593 flow [2022-11-21 16:50:14,928 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=201, PETRI_DIFFERENCE_MINUEND_FLOW=3487, PETRI_DIFFERENCE_MINUEND_PLACES=348, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=592, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=166, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=399, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=4593, PETRI_PLACES=376, PETRI_TRANSITIONS=639} [2022-11-21 16:50:14,928 INFO L288 CegarLoopForPetriNet]: 175 programPoint places, 201 predicate places. [2022-11-21 16:50:14,928 INFO L495 AbstractCegarLoop]: Abstraction has has 376 places, 639 transitions, 4593 flow [2022-11-21 16:50:14,930 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 127.0) internal successors, (1778), 14 states have internal predecessors, (1778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:50:14,930 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:50:14,930 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:50:14,939 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e068d3d-7efe-44b8-999f-5009eaf120f0/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-21 16:50:15,136 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e068d3d-7efe-44b8-999f-5009eaf120f0/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:50:15,136 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 27 more)] === [2022-11-21 16:50:15,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:50:15,137 INFO L85 PathProgramCache]: Analyzing trace with hash 628253522, now seen corresponding path program 1 times [2022-11-21 16:50:15,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:50:15,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876149580] [2022-11-21 16:50:15,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:50:15,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:50:15,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:50:16,448 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-21 16:50:16,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:50:16,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876149580] [2022-11-21 16:50:16,448 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1876149580] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:50:16,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1176131431] [2022-11-21 16:50:16,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:50:16,449 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:50:16,449 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e068d3d-7efe-44b8-999f-5009eaf120f0/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:50:16,450 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e068d3d-7efe-44b8-999f-5009eaf120f0/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:50:16,479 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e068d3d-7efe-44b8-999f-5009eaf120f0/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-21 16:50:16,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:50:16,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 40 conjunts are in the unsatisfiable core [2022-11-21 16:50:16,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:50:17,604 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 [2022-11-21 16:50:18,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 16:50:18,328 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 16 treesize of output 18 [2022-11-21 16:50:18,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 16:50:18,584 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 16 treesize of output 18 [2022-11-21 16:50:18,695 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-21 16:50:18,698 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-21 16:50:18,698 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 19 treesize of output 12 [2022-11-21 16:50:18,787 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-21 16:50:18,787 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:50:18,928 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_293 (Array Int Int))) (< 0 (+ 2147483650 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_293) c_~q2~0.base) (+ c_~q2~0.offset (* c_~q2_front~0 4)))))) is different from false [2022-11-21 16:50:19,924 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-21 16:50:19,925 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 [2022-11-21 16:50:19,939 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-21 16:50:19,939 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 174 treesize of output 162 [2022-11-21 16:50:19,951 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 73 treesize of output 61 [2022-11-21 16:50:19,962 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 134 treesize of output 110 [2022-11-21 16:50:21,778 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-21 16:50:21,779 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1176131431] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:50:21,779 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:50:21,779 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 22, 22] total 61 [2022-11-21 16:50:21,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444535509] [2022-11-21 16:50:21,779 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:50:21,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-11-21 16:50:21,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:50:21,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-11-21 16:50:21,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=3439, Unknown=4, NotChecked=118, Total=3782 [2022-11-21 16:50:21,788 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 201 [2022-11-21 16:50:21,792 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 376 places, 639 transitions, 4593 flow. Second operand has 62 states, 62 states have (on average 91.2741935483871) internal successors, (5659), 62 states have internal predecessors, (5659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:50:21,792 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:50:21,793 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 201 [2022-11-21 16:50:21,793 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 16:50:36,736 WARN L233 SmtUtils]: Spent 10.47s on a formula simplification. DAG size of input: 145 DAG size of output: 101 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-21 16:50:47,920 WARN L233 SmtUtils]: Spent 10.54s on a formula simplification. DAG size of input: 139 DAG size of output: 101 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-21 16:51:03,288 WARN L233 SmtUtils]: Spent 13.25s on a formula simplification. DAG size of input: 134 DAG size of output: 110 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-21 16:51:19,313 WARN L233 SmtUtils]: Spent 10.78s on a formula simplification. DAG size of input: 109 DAG size of output: 104 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-21 16:51:35,184 WARN L233 SmtUtils]: Spent 6.57s on a formula simplification. DAG size of input: 103 DAG size of output: 98 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-21 16:51:45,990 WARN L233 SmtUtils]: Spent 8.74s on a formula simplification. DAG size of input: 111 DAG size of output: 105 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-21 16:51:53,590 WARN L233 SmtUtils]: Spent 6.65s on a formula simplification. DAG size of input: 107 DAG size of output: 102 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-21 16:52:09,203 WARN L233 SmtUtils]: Spent 12.84s on a formula simplification. DAG size of input: 107 DAG size of output: 102 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-21 16:52:14,596 WARN L233 SmtUtils]: Spent 5.06s on a formula simplification. DAG size of input: 115 DAG size of output: 102 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-21 16:52:23,993 WARN L233 SmtUtils]: Spent 6.59s on a formula simplification. DAG size of input: 111 DAG size of output: 106 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-21 16:52:39,397 WARN L233 SmtUtils]: Spent 15.07s on a formula simplification. DAG size of input: 111 DAG size of output: 98 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-21 16:53:18,189 INFO L130 PetriNetUnfolder]: 23906/50616 cut-off events. [2022-11-21 16:53:18,189 INFO L131 PetriNetUnfolder]: For 143954/144460 co-relation queries the response was YES. [2022-11-21 16:53:18,655 INFO L83 FinitePrefix]: Finished finitePrefix Result has 169723 conditions, 50616 events. 23906/50616 cut-off events. For 143954/144460 co-relation queries the response was YES. Maximal size of possible extension queue 1210. Compared 523047 event pairs, 2930 based on Foata normal form. 940/47449 useless extension candidates. Maximal degree in co-relation 161334. Up to 9268 conditions per place. [2022-11-21 16:53:18,903 INFO L137 encePairwiseOnDemand]: 158/201 looper letters, 1073 selfloop transitions, 752 changer transitions 13/1929 dead transitions. [2022-11-21 16:53:18,903 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 491 places, 1929 transitions, 15981 flow [2022-11-21 16:53:18,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2022-11-21 16:53:18,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2022-11-21 16:53:18,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 11303 transitions. [2022-11-21 16:53:18,941 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.47255320038463144 [2022-11-21 16:53:18,942 INFO L72 ComplementDD]: Start complementDD. Operand 119 states and 11303 transitions. [2022-11-21 16:53:18,942 INFO L73 IsDeterministic]: Start isDeterministic. Operand 119 states and 11303 transitions. [2022-11-21 16:53:18,948 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 16:53:18,949 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 119 states and 11303 transitions. [2022-11-21 16:53:18,974 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 120 states, 119 states have (on average 94.98319327731092) internal successors, (11303), 119 states have internal predecessors, (11303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:53:19,009 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 120 states, 120 states have (on average 201.0) internal successors, (24120), 120 states have internal predecessors, (24120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:53:19,014 INFO L81 ComplementDD]: Finished complementDD. Result has 120 states, 120 states have (on average 201.0) internal successors, (24120), 120 states have internal predecessors, (24120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:53:19,014 INFO L175 Difference]: Start difference. First operand has 376 places, 639 transitions, 4593 flow. Second operand 119 states and 11303 transitions. [2022-11-21 16:53:19,014 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 491 places, 1929 transitions, 15981 flow [2022-11-21 16:53:25,802 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 475 places, 1929 transitions, 15629 flow, removed 54 selfloop flow, removed 16 redundant places. [2022-11-21 16:53:25,823 INFO L231 Difference]: Finished difference. Result has 511 places, 1124 transitions, 10470 flow [2022-11-21 16:53:25,824 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=201, PETRI_DIFFERENCE_MINUEND_FLOW=4272, PETRI_DIFFERENCE_MINUEND_PLACES=357, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=622, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=279, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=301, PETRI_DIFFERENCE_SUBTRAHEND_STATES=119, PETRI_FLOW=10470, PETRI_PLACES=511, PETRI_TRANSITIONS=1124} [2022-11-21 16:53:25,824 INFO L288 CegarLoopForPetriNet]: 175 programPoint places, 336 predicate places. [2022-11-21 16:53:25,825 INFO L495 AbstractCegarLoop]: Abstraction has has 511 places, 1124 transitions, 10470 flow [2022-11-21 16:53:25,825 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 91.2741935483871) internal successors, (5659), 62 states have internal predecessors, (5659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:53:25,825 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:53:25,826 INFO L209 CegarLoopForPetriNet]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:53:25,831 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e068d3d-7efe-44b8-999f-5009eaf120f0/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-21 16:53:26,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e068d3d-7efe-44b8-999f-5009eaf120f0/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:53:26,027 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 27 more)] === [2022-11-21 16:53:26,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:53:26,027 INFO L85 PathProgramCache]: Analyzing trace with hash -1931854209, now seen corresponding path program 1 times [2022-11-21 16:53:26,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:53:26,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558483038] [2022-11-21 16:53:26,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:53:26,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:53:26,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:53:26,432 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-21 16:53:26,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:53:26,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558483038] [2022-11-21 16:53:26,432 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [558483038] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:53:26,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1996750522] [2022-11-21 16:53:26,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:53:26,433 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:53:26,433 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e068d3d-7efe-44b8-999f-5009eaf120f0/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:53:26,435 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e068d3d-7efe-44b8-999f-5009eaf120f0/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:53:26,469 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e068d3d-7efe-44b8-999f-5009eaf120f0/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-21 16:53:26,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:53:26,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-21 16:53:26,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:53:26,963 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-21 16:53:26,963 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:53:27,420 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-21 16:53:27,420 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1996750522] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:53:27,420 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:53:27,420 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-11-21 16:53:27,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482186889] [2022-11-21 16:53:27,422 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:53:27,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-21 16:53:27,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:53:27,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-21 16:53:27,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2022-11-21 16:53:27,428 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 201 [2022-11-21 16:53:27,431 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 511 places, 1124 transitions, 10470 flow. Second operand has 19 states, 19 states have (on average 140.73684210526315) internal successors, (2674), 19 states have internal predecessors, (2674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:53:27,431 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:53:27,431 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 201 [2022-11-21 16:53:27,431 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 16:53:36,431 INFO L130 PetriNetUnfolder]: 6033/20437 cut-off events. [2022-11-21 16:53:36,431 INFO L131 PetriNetUnfolder]: For 304188/309284 co-relation queries the response was YES. [2022-11-21 16:53:36,658 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107041 conditions, 20437 events. 6033/20437 cut-off events. For 304188/309284 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 227073 event pairs, 1187 based on Foata normal form. 462/19429 useless extension candidates. Maximal degree in co-relation 106354. Up to 4090 conditions per place. [2022-11-21 16:53:36,765 INFO L137 encePairwiseOnDemand]: 188/201 looper letters, 393 selfloop transitions, 31 changer transitions 1/754 dead transitions. [2022-11-21 16:53:36,765 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 474 places, 754 transitions, 7457 flow [2022-11-21 16:53:36,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-21 16:53:36,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-11-21 16:53:36,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1848 transitions. [2022-11-21 16:53:36,769 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7072330654420207 [2022-11-21 16:53:36,769 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1848 transitions. [2022-11-21 16:53:36,769 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1848 transitions. [2022-11-21 16:53:36,770 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 16:53:36,770 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1848 transitions. [2022-11-21 16:53:36,774 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 142.15384615384616) internal successors, (1848), 13 states have internal predecessors, (1848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:53:36,777 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 201.0) internal successors, (2814), 14 states have internal predecessors, (2814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:53:36,778 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 201.0) internal successors, (2814), 14 states have internal predecessors, (2814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:53:36,778 INFO L175 Difference]: Start difference. First operand has 511 places, 1124 transitions, 10470 flow. Second operand 13 states and 1848 transitions. [2022-11-21 16:53:36,778 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 474 places, 754 transitions, 7457 flow [2022-11-21 16:53:39,934 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 418 places, 754 transitions, 6862 flow, removed 154 selfloop flow, removed 56 redundant places. [2022-11-21 16:53:39,947 INFO L231 Difference]: Finished difference. Result has 419 places, 704 transitions, 5765 flow [2022-11-21 16:53:39,947 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=201, PETRI_DIFFERENCE_MINUEND_FLOW=5678, PETRI_DIFFERENCE_MINUEND_PLACES=406, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=704, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=673, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=5765, PETRI_PLACES=419, PETRI_TRANSITIONS=704} [2022-11-21 16:53:39,948 INFO L288 CegarLoopForPetriNet]: 175 programPoint places, 244 predicate places. [2022-11-21 16:53:39,948 INFO L495 AbstractCegarLoop]: Abstraction has has 419 places, 704 transitions, 5765 flow [2022-11-21 16:53:39,949 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 140.73684210526315) internal successors, (2674), 19 states have internal predecessors, (2674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:53:39,949 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:53:39,949 INFO L209 CegarLoopForPetriNet]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:53:39,960 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e068d3d-7efe-44b8-999f-5009eaf120f0/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-21 16:53:40,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e068d3d-7efe-44b8-999f-5009eaf120f0/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:53:40,159 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 27 more)] === [2022-11-21 16:53:40,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:53:40,160 INFO L85 PathProgramCache]: Analyzing trace with hash -1405150749, now seen corresponding path program 1 times [2022-11-21 16:53:40,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:53:40,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359456112] [2022-11-21 16:53:40,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:53:40,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:53:40,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:53:40,482 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-21 16:53:40,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:53:40,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359456112] [2022-11-21 16:53:40,482 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1359456112] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:53:40,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [187338177] [2022-11-21 16:53:40,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:53:40,483 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:53:40,483 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e068d3d-7efe-44b8-999f-5009eaf120f0/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:53:40,485 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e068d3d-7efe-44b8-999f-5009eaf120f0/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:53:40,516 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e068d3d-7efe-44b8-999f-5009eaf120f0/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-21 16:53:40,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:53:40,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-21 16:53:40,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:53:41,113 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-21 16:53:41,113 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:53:41,658 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-21 16:53:41,658 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [187338177] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:53:41,658 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:53:41,658 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-11-21 16:53:41,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396728831] [2022-11-21 16:53:41,659 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:53:41,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-21 16:53:41,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:53:41,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-21 16:53:41,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2022-11-21 16:53:41,663 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 201 [2022-11-21 16:53:41,666 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 419 places, 704 transitions, 5765 flow. Second operand has 19 states, 19 states have (on average 140.8421052631579) internal successors, (2676), 19 states have internal predecessors, (2676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:53:41,666 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:53:41,666 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 201 [2022-11-21 16:53:41,666 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 16:53:48,549 INFO L130 PetriNetUnfolder]: 5626/19684 cut-off events. [2022-11-21 16:53:48,550 INFO L131 PetriNetUnfolder]: For 77287/78568 co-relation queries the response was YES. [2022-11-21 16:53:48,748 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74398 conditions, 19684 events. 5626/19684 cut-off events. For 77287/78568 co-relation queries the response was YES. Maximal size of possible extension queue 387. Compared 218991 event pairs, 1188 based on Foata normal form. 651/18774 useless extension candidates. Maximal degree in co-relation 72064. Up to 2818 conditions per place. [2022-11-21 16:53:48,838 INFO L137 encePairwiseOnDemand]: 186/201 looper letters, 352 selfloop transitions, 59 changer transitions 52/772 dead transitions. [2022-11-21 16:53:48,838 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 437 places, 772 transitions, 6844 flow [2022-11-21 16:53:48,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-21 16:53:48,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2022-11-21 16:53:48,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 2843 transitions. [2022-11-21 16:53:48,845 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7072139303482587 [2022-11-21 16:53:48,845 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 2843 transitions. [2022-11-21 16:53:48,845 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 2843 transitions. [2022-11-21 16:53:48,847 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 16:53:48,847 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 2843 transitions. [2022-11-21 16:53:48,854 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 142.15) internal successors, (2843), 20 states have internal predecessors, (2843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:53:48,860 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 201.0) internal successors, (4221), 21 states have internal predecessors, (4221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:53:48,861 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 201.0) internal successors, (4221), 21 states have internal predecessors, (4221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:53:48,862 INFO L175 Difference]: Start difference. First operand has 419 places, 704 transitions, 5765 flow. Second operand 20 states and 2843 transitions. [2022-11-21 16:53:48,862 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 437 places, 772 transitions, 6844 flow [2022-11-21 16:53:50,706 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 425 places, 772 transitions, 6712 flow, removed 3 selfloop flow, removed 12 redundant places. [2022-11-21 16:53:50,715 INFO L231 Difference]: Finished difference. Result has 427 places, 626 transitions, 4917 flow [2022-11-21 16:53:50,716 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=201, PETRI_DIFFERENCE_MINUEND_FLOW=5022, PETRI_DIFFERENCE_MINUEND_PLACES=406, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=642, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=601, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=4917, PETRI_PLACES=427, PETRI_TRANSITIONS=626} [2022-11-21 16:53:50,717 INFO L288 CegarLoopForPetriNet]: 175 programPoint places, 252 predicate places. [2022-11-21 16:53:50,717 INFO L495 AbstractCegarLoop]: Abstraction has has 427 places, 626 transitions, 4917 flow [2022-11-21 16:53:50,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 140.8421052631579) internal successors, (2676), 19 states have internal predecessors, (2676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:53:50,718 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:53:50,720 INFO L209 CegarLoopForPetriNet]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:53:50,733 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e068d3d-7efe-44b8-999f-5009eaf120f0/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-21 16:53:50,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e068d3d-7efe-44b8-999f-5009eaf120f0/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-21 16:53:50,927 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 27 more)] === [2022-11-21 16:53:50,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:53:50,928 INFO L85 PathProgramCache]: Analyzing trace with hash 382949179, now seen corresponding path program 1 times [2022-11-21 16:53:50,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:53:50,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448806409] [2022-11-21 16:53:50,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:53:50,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:53:50,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:53:56,344 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:53:56,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:53:56,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448806409] [2022-11-21 16:53:56,345 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1448806409] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:53:56,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [777316879] [2022-11-21 16:53:56,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:53:56,346 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:53:56,346 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e068d3d-7efe-44b8-999f-5009eaf120f0/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:53:56,355 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e068d3d-7efe-44b8-999f-5009eaf120f0/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:53:56,357 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e068d3d-7efe-44b8-999f-5009eaf120f0/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-21 16:53:56,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:53:56,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-21 16:53:56,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:53:58,366 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 23 treesize of output 7 [2022-11-21 16:53:58,520 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-21 16:53:58,520 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:53:58,780 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-21 16:53:58,780 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 26 treesize of output 22 [2022-11-21 16:54:01,516 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-21 16:54:01,517 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [777316879] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:54:01,517 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:54:01,517 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 14, 14] total 55 [2022-11-21 16:54:01,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967260916] [2022-11-21 16:54:01,518 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:54:01,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-11-21 16:54:01,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:54:01,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-11-21 16:54:01,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=2804, Unknown=0, NotChecked=0, Total=3080 [2022-11-21 16:54:01,525 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 201 [2022-11-21 16:54:01,530 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 427 places, 626 transitions, 4917 flow. Second operand has 56 states, 56 states have (on average 89.19642857142857) internal successors, (4995), 56 states have internal predecessors, (4995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:54:01,530 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:54:01,530 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 201 [2022-11-21 16:54:01,530 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand