./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/weaver/popl20-prod-cons.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_9521d75d-5a05-4a74-a103-2fd821f09e3f/bin/uautomizer-vX5HgA9Q3a/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9521d75d-5a05-4a74-a103-2fd821f09e3f/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_9521d75d-5a05-4a74-a103-2fd821f09e3f/bin/uautomizer-vX5HgA9Q3a/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9521d75d-5a05-4a74-a103-2fd821f09e3f/bin/uautomizer-vX5HgA9Q3a/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-prod-cons.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9521d75d-5a05-4a74-a103-2fd821f09e3f/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_9521d75d-5a05-4a74-a103-2fd821f09e3f/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 f9b434f3343269d91303305376bff127738dc22172486554888e346753333fd7 --- 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 16:14:33,871 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-21 16:14:33,874 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-21 16:14:33,898 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-21 16:14:33,903 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-21 16:14:33,904 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-21 16:14:33,905 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-21 16:14:33,907 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-21 16:14:33,909 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-21 16:14:33,909 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-21 16:14:33,910 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-21 16:14:33,912 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-21 16:14:33,912 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-21 16:14:33,913 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-21 16:14:33,914 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-21 16:14:33,921 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-21 16:14:33,922 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-21 16:14:33,930 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-21 16:14:33,933 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-21 16:14:33,939 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-21 16:14:33,940 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-21 16:14:33,944 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-21 16:14:33,945 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-21 16:14:33,946 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-21 16:14:33,955 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-21 16:14:33,955 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-21 16:14:33,956 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-21 16:14:33,957 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-21 16:14:33,957 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-21 16:14:33,958 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-21 16:14:33,958 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-21 16:14:33,959 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-21 16:14:33,960 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-21 16:14:33,961 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-21 16:14:33,962 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-21 16:14:33,962 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-21 16:14:33,963 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-21 16:14:33,963 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-21 16:14:33,963 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-21 16:14:33,964 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-21 16:14:33,965 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-21 16:14:33,969 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9521d75d-5a05-4a74-a103-2fd821f09e3f/bin/uautomizer-vX5HgA9Q3a/config/svcomp-Overflow-32bit-Automizer_Default.epf [2022-11-21 16:14:34,009 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-21 16:14:34,010 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-21 16:14:34,011 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-21 16:14:34,011 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-21 16:14:34,012 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-21 16:14:34,013 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-21 16:14:34,013 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-21 16:14:34,013 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-21 16:14:34,014 INFO L138 SettingsManager]: * Use SBE=true [2022-11-21 16:14:34,014 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-21 16:14:34,015 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-21 16:14:34,015 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-21 16:14:34,015 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-21 16:14:34,016 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-21 16:14:34,016 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-21 16:14:34,016 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-21 16:14:34,016 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-21 16:14:34,016 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-21 16:14:34,016 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2022-11-21 16:14:34,017 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-21 16:14:34,017 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-21 16:14:34,017 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-21 16:14:34,017 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-21 16:14:34,017 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-21 16:14:34,018 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-21 16:14:34,018 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-21 16:14:34,018 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-21 16:14:34,018 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-21 16:14:34,019 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-21 16:14:34,019 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-21 16:14:34,020 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-21 16:14:34,020 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-21 16:14:34,020 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-21 16:14:34,020 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-21 16:14:34,020 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-21 16:14:34,021 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_9521d75d-5a05-4a74-a103-2fd821f09e3f/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9521d75d-5a05-4a74-a103-2fd821f09e3f/bin/uautomizer-vX5HgA9Q3a Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f9b434f3343269d91303305376bff127738dc22172486554888e346753333fd7 [2022-11-21 16:14:34,334 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-21 16:14:34,363 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-21 16:14:34,366 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-21 16:14:34,368 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-21 16:14:34,369 INFO L275 PluginConnector]: CDTParser initialized [2022-11-21 16:14:34,370 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9521d75d-5a05-4a74-a103-2fd821f09e3f/bin/uautomizer-vX5HgA9Q3a/../../sv-benchmarks/c/weaver/popl20-prod-cons.wvr.c [2022-11-21 16:14:37,510 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-21 16:14:37,705 INFO L351 CDTParser]: Found 1 translation units. [2022-11-21 16:14:37,706 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9521d75d-5a05-4a74-a103-2fd821f09e3f/sv-benchmarks/c/weaver/popl20-prod-cons.wvr.c [2022-11-21 16:14:37,713 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9521d75d-5a05-4a74-a103-2fd821f09e3f/bin/uautomizer-vX5HgA9Q3a/data/71af4ff82/25d9f68a6fb14952948f4075350214d2/FLAG838aa142d [2022-11-21 16:14:37,729 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9521d75d-5a05-4a74-a103-2fd821f09e3f/bin/uautomizer-vX5HgA9Q3a/data/71af4ff82/25d9f68a6fb14952948f4075350214d2 [2022-11-21 16:14:37,731 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-21 16:14:37,733 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-21 16:14:37,735 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-21 16:14:37,735 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-21 16:14:37,739 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-21 16:14:37,739 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 04:14:37" (1/1) ... [2022-11-21 16:14:37,741 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@b1e3b0e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:14:37, skipping insertion in model container [2022-11-21 16:14:37,741 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 04:14:37" (1/1) ... [2022-11-21 16:14:37,749 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-21 16:14:37,768 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-21 16:14:37,990 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_9521d75d-5a05-4a74-a103-2fd821f09e3f/sv-benchmarks/c/weaver/popl20-prod-cons.wvr.c[3056,3069] [2022-11-21 16:14:37,998 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-21 16:14:38,015 INFO L203 MainTranslator]: Completed pre-run [2022-11-21 16:14:38,038 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_9521d75d-5a05-4a74-a103-2fd821f09e3f/sv-benchmarks/c/weaver/popl20-prod-cons.wvr.c[3056,3069] [2022-11-21 16:14:38,042 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-21 16:14:38,056 INFO L208 MainTranslator]: Completed translation [2022-11-21 16:14:38,056 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:14:38 WrapperNode [2022-11-21 16:14:38,056 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-21 16:14:38,057 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-21 16:14:38,057 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-21 16:14:38,058 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-21 16:14:38,065 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:14:38" (1/1) ... [2022-11-21 16:14:38,073 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:14:38" (1/1) ... [2022-11-21 16:14:38,097 INFO L138 Inliner]: procedures = 25, calls = 50, calls flagged for inlining = 10, calls inlined = 10, statements flattened = 176 [2022-11-21 16:14:38,097 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-21 16:14:38,098 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-21 16:14:38,098 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-21 16:14:38,098 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-21 16:14:38,108 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:14:38" (1/1) ... [2022-11-21 16:14:38,108 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:14:38" (1/1) ... [2022-11-21 16:14:38,112 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:14:38" (1/1) ... [2022-11-21 16:14:38,112 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:14:38" (1/1) ... [2022-11-21 16:14:38,118 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:14:38" (1/1) ... [2022-11-21 16:14:38,122 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:14:38" (1/1) ... [2022-11-21 16:14:38,124 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:14:38" (1/1) ... [2022-11-21 16:14:38,125 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:14:38" (1/1) ... [2022-11-21 16:14:38,128 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-21 16:14:38,129 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-21 16:14:38,129 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-21 16:14:38,129 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-21 16:14:38,130 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:14:38" (1/1) ... [2022-11-21 16:14:38,136 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-21 16:14:38,149 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9521d75d-5a05-4a74-a103-2fd821f09e3f/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:14:38,169 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9521d75d-5a05-4a74-a103-2fd821f09e3f/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-21 16:14:38,194 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9521d75d-5a05-4a74-a103-2fd821f09e3f/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-21 16:14:38,221 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-21 16:14:38,221 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-21 16:14:38,221 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-21 16:14:38,222 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-21 16:14:38,222 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-21 16:14:38,224 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-21 16:14:38,224 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-21 16:14:38,224 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-21 16:14:38,224 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-11-21 16:14:38,225 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-11-21 16:14:38,225 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-21 16:14:38,225 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-21 16:14:38,225 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-21 16:14:38,225 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-21 16:14:38,226 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-21 16:14:38,226 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-21 16:14:38,226 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-21 16:14:38,228 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 16:14:38,339 INFO L235 CfgBuilder]: Building ICFG [2022-11-21 16:14:38,342 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-21 16:14:38,728 INFO L276 CfgBuilder]: Performing block encoding [2022-11-21 16:14:38,891 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-21 16:14:38,893 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-21 16:14:38,895 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 04:14:38 BoogieIcfgContainer [2022-11-21 16:14:38,896 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-21 16:14:38,904 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-21 16:14:38,905 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-21 16:14:38,908 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-21 16:14:38,908 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 04:14:37" (1/3) ... [2022-11-21 16:14:38,909 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67df0e00 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 04:14:38, skipping insertion in model container [2022-11-21 16:14:38,909 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:14:38" (2/3) ... [2022-11-21 16:14:38,909 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67df0e00 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 04:14:38, skipping insertion in model container [2022-11-21 16:14:38,910 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 04:14:38" (3/3) ... [2022-11-21 16:14:38,913 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-prod-cons.wvr.c [2022-11-21 16:14:38,924 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-21 16:14:38,933 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-21 16:14:38,934 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2022-11-21 16:14:38,934 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-21 16:14:39,075 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-11-21 16:14:39,113 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 168 places, 169 transitions, 362 flow [2022-11-21 16:14:39,194 INFO L130 PetriNetUnfolder]: 11/166 cut-off events. [2022-11-21 16:14:39,194 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-21 16:14:39,206 INFO L83 FinitePrefix]: Finished finitePrefix Result has 179 conditions, 166 events. 11/166 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 145 event pairs, 0 based on Foata normal form. 0/145 useless extension candidates. Maximal degree in co-relation 136. Up to 3 conditions per place. [2022-11-21 16:14:39,207 INFO L82 GeneralOperation]: Start removeDead. Operand has 168 places, 169 transitions, 362 flow [2022-11-21 16:14:39,212 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 142 places, 142 transitions, 296 flow [2022-11-21 16:14:39,232 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-21 16:14:39,239 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;@a14fa9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-21 16:14:39,239 INFO L358 AbstractCegarLoop]: Starting to check reachability of 21 error locations. [2022-11-21 16:14:39,266 INFO L130 PetriNetUnfolder]: 3/70 cut-off events. [2022-11-21 16:14:39,267 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-21 16:14:39,267 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:14:39,268 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] [2022-11-21 16:14:39,268 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2022-11-21 16:14:39,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:14:39,274 INFO L85 PathProgramCache]: Analyzing trace with hash -1820468164, now seen corresponding path program 1 times [2022-11-21 16:14:39,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:14:39,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977070596] [2022-11-21 16:14:39,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:14:39,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:14:39,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:14:39,798 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 16:14:39,798 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:14:39,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977070596] [2022-11-21 16:14:39,800 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [977070596] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:14:39,800 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:14:39,801 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 16:14:39,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479468404] [2022-11-21 16:14:39,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:14:39,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-21 16:14:39,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:14:39,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-21 16:14:39,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-21 16:14:39,875 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 169 [2022-11-21 16:14:39,882 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 142 transitions, 296 flow. Second operand has 4 states, 4 states have (on average 136.5) internal successors, (546), 4 states have internal predecessors, (546), 0 states have call successors, (0), 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 16:14:39,883 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:14:39,883 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 169 [2022-11-21 16:14:39,884 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 16:14:40,229 INFO L130 PetriNetUnfolder]: 161/592 cut-off events. [2022-11-21 16:14:40,230 INFO L131 PetriNetUnfolder]: For 98/98 co-relation queries the response was YES. [2022-11-21 16:14:40,237 INFO L83 FinitePrefix]: Finished finitePrefix Result has 935 conditions, 592 events. 161/592 cut-off events. For 98/98 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 2848 event pairs, 72 based on Foata normal form. 64/484 useless extension candidates. Maximal degree in co-relation 482. Up to 124 conditions per place. [2022-11-21 16:14:40,243 INFO L137 encePairwiseOnDemand]: 155/169 looper letters, 36 selfloop transitions, 4 changer transitions 3/152 dead transitions. [2022-11-21 16:14:40,243 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 152 transitions, 408 flow [2022-11-21 16:14:40,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-21 16:14:40,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-21 16:14:40,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 731 transitions. [2022-11-21 16:14:40,270 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8650887573964497 [2022-11-21 16:14:40,271 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 731 transitions. [2022-11-21 16:14:40,272 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 731 transitions. [2022-11-21 16:14:40,274 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 16:14:40,277 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 731 transitions. [2022-11-21 16:14:40,282 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 146.2) internal successors, (731), 5 states have internal predecessors, (731), 0 states have call successors, (0), 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 16:14:40,291 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 169.0) internal successors, (1014), 6 states have internal predecessors, (1014), 0 states have call successors, (0), 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 16:14:40,292 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 169.0) internal successors, (1014), 6 states have internal predecessors, (1014), 0 states have call successors, (0), 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 16:14:40,295 INFO L175 Difference]: Start difference. First operand has 142 places, 142 transitions, 296 flow. Second operand 5 states and 731 transitions. [2022-11-21 16:14:40,296 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 152 transitions, 408 flow [2022-11-21 16:14:40,304 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 152 transitions, 396 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-11-21 16:14:40,314 INFO L231 Difference]: Finished difference. Result has 143 places, 134 transitions, 298 flow [2022-11-21 16:14:40,317 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=169, PETRI_DIFFERENCE_MINUEND_FLOW=274, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=298, PETRI_PLACES=143, PETRI_TRANSITIONS=134} [2022-11-21 16:14:40,324 INFO L288 CegarLoopForPetriNet]: 142 programPoint places, 1 predicate places. [2022-11-21 16:14:40,325 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 134 transitions, 298 flow [2022-11-21 16:14:40,325 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 136.5) internal successors, (546), 4 states have internal predecessors, (546), 0 states have call successors, (0), 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 16:14:40,325 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:14:40,326 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] [2022-11-21 16:14:40,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-21 16:14:40,327 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2022-11-21 16:14:40,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:14:40,328 INFO L85 PathProgramCache]: Analyzing trace with hash -1912163069, now seen corresponding path program 1 times [2022-11-21 16:14:40,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:14:40,329 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757991265] [2022-11-21 16:14:40,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:14:40,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:14:40,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:14:40,537 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 16:14:40,537 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:14:40,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757991265] [2022-11-21 16:14:40,538 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [757991265] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:14:40,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [161702134] [2022-11-21 16:14:40,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:14:40,539 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:14:40,539 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9521d75d-5a05-4a74-a103-2fd821f09e3f/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:14:40,542 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9521d75d-5a05-4a74-a103-2fd821f09e3f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:14:40,559 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9521d75d-5a05-4a74-a103-2fd821f09e3f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-21 16:14:40,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:14:40,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-21 16:14:40,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:14:40,824 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 16:14:40,825 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:14:40,920 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 16:14:40,920 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [161702134] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:14:40,921 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:14:40,921 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2022-11-21 16:14:40,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812632481] [2022-11-21 16:14:40,922 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:14:40,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-21 16:14:40,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:14:40,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-21 16:14:40,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-11-21 16:14:40,927 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 169 [2022-11-21 16:14:40,929 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 134 transitions, 298 flow. Second operand has 12 states, 12 states have (on average 137.66666666666666) internal successors, (1652), 12 states have internal predecessors, (1652), 0 states have call successors, (0), 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 16:14:40,929 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:14:40,929 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 169 [2022-11-21 16:14:40,930 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 16:14:41,578 INFO L130 PetriNetUnfolder]: 401/1388 cut-off events. [2022-11-21 16:14:41,578 INFO L131 PetriNetUnfolder]: For 61/61 co-relation queries the response was YES. [2022-11-21 16:14:41,585 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2203 conditions, 1388 events. 401/1388 cut-off events. For 61/61 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 8664 event pairs, 180 based on Foata normal form. 3/976 useless extension candidates. Maximal degree in co-relation 1712. Up to 119 conditions per place. [2022-11-21 16:14:41,595 INFO L137 encePairwiseOnDemand]: 162/169 looper letters, 78 selfloop transitions, 18 changer transitions 0/205 dead transitions. [2022-11-21 16:14:41,595 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 205 transitions, 678 flow [2022-11-21 16:14:41,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-21 16:14:41,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-11-21 16:14:41,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2529 transitions. [2022-11-21 16:14:41,602 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8313609467455622 [2022-11-21 16:14:41,603 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2529 transitions. [2022-11-21 16:14:41,603 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2529 transitions. [2022-11-21 16:14:41,605 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 16:14:41,605 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2529 transitions. [2022-11-21 16:14:41,612 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 140.5) internal successors, (2529), 18 states have internal predecessors, (2529), 0 states have call successors, (0), 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 16:14:41,619 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 169.0) internal successors, (3211), 19 states have internal predecessors, (3211), 0 states have call successors, (0), 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 16:14:41,621 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 169.0) internal successors, (3211), 19 states have internal predecessors, (3211), 0 states have call successors, (0), 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 16:14:41,622 INFO L175 Difference]: Start difference. First operand has 143 places, 134 transitions, 298 flow. Second operand 18 states and 2529 transitions. [2022-11-21 16:14:41,622 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 205 transitions, 678 flow [2022-11-21 16:14:41,624 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 205 transitions, 676 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-21 16:14:41,628 INFO L231 Difference]: Finished difference. Result has 160 places, 146 transitions, 402 flow [2022-11-21 16:14:41,628 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=169, PETRI_DIFFERENCE_MINUEND_FLOW=296, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=402, PETRI_PLACES=160, PETRI_TRANSITIONS=146} [2022-11-21 16:14:41,629 INFO L288 CegarLoopForPetriNet]: 142 programPoint places, 18 predicate places. [2022-11-21 16:14:41,630 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 146 transitions, 402 flow [2022-11-21 16:14:41,631 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 137.66666666666666) internal successors, (1652), 12 states have internal predecessors, (1652), 0 states have call successors, (0), 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 16:14:41,631 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:14:41,632 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] [2022-11-21 16:14:41,638 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9521d75d-5a05-4a74-a103-2fd821f09e3f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-21 16:14:41,838 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9521d75d-5a05-4a74-a103-2fd821f09e3f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:14:41,838 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2022-11-21 16:14:41,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:14:41,839 INFO L85 PathProgramCache]: Analyzing trace with hash 852487388, now seen corresponding path program 1 times [2022-11-21 16:14:41,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:14:41,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876187399] [2022-11-21 16:14:41,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:14:41,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:14:41,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:14:42,077 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 16:14:42,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:14:42,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876187399] [2022-11-21 16:14:42,078 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1876187399] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:14:42,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1649617838] [2022-11-21 16:14:42,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:14:42,078 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:14:42,079 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9521d75d-5a05-4a74-a103-2fd821f09e3f/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:14:42,080 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9521d75d-5a05-4a74-a103-2fd821f09e3f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:14:42,108 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9521d75d-5a05-4a74-a103-2fd821f09e3f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-21 16:14:42,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:14:42,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-21 16:14:42,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:14:42,231 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 16:14:42,231 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-21 16:14:42,231 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1649617838] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:14:42,232 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-21 16:14:42,232 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2022-11-21 16:14:42,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614495722] [2022-11-21 16:14:42,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:14:42,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-21 16:14:42,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:14:42,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-21 16:14:42,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-21 16:14:42,235 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 169 [2022-11-21 16:14:42,237 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 146 transitions, 402 flow. Second operand has 6 states, 6 states have (on average 137.33333333333334) internal successors, (824), 6 states have internal predecessors, (824), 0 states have call successors, (0), 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 16:14:42,237 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:14:42,237 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 169 [2022-11-21 16:14:42,237 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 16:14:42,671 INFO L130 PetriNetUnfolder]: 401/1384 cut-off events. [2022-11-21 16:14:42,671 INFO L131 PetriNetUnfolder]: For 97/97 co-relation queries the response was YES. [2022-11-21 16:14:42,675 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2221 conditions, 1384 events. 401/1384 cut-off events. For 97/97 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 8586 event pairs, 180 based on Foata normal form. 4/973 useless extension candidates. Maximal degree in co-relation 1762. Up to 460 conditions per place. [2022-11-21 16:14:42,683 INFO L137 encePairwiseOnDemand]: 164/169 looper letters, 37 selfloop transitions, 11 changer transitions 0/157 dead transitions. [2022-11-21 16:14:42,683 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 157 transitions, 509 flow [2022-11-21 16:14:42,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-21 16:14:42,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-21 16:14:42,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 985 transitions. [2022-11-21 16:14:42,686 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8326289095519864 [2022-11-21 16:14:42,686 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 985 transitions. [2022-11-21 16:14:42,687 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 985 transitions. [2022-11-21 16:14:42,687 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 16:14:42,687 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 985 transitions. [2022-11-21 16:14:42,690 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 140.71428571428572) internal successors, (985), 7 states have internal predecessors, (985), 0 states have call successors, (0), 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 16:14:42,692 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 169.0) internal successors, (1352), 8 states have internal predecessors, (1352), 0 states have call successors, (0), 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 16:14:42,693 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 169.0) internal successors, (1352), 8 states have internal predecessors, (1352), 0 states have call successors, (0), 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 16:14:42,693 INFO L175 Difference]: Start difference. First operand has 160 places, 146 transitions, 402 flow. Second operand 7 states and 985 transitions. [2022-11-21 16:14:42,693 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 157 transitions, 509 flow [2022-11-21 16:14:42,699 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 157 transitions, 477 flow, removed 11 selfloop flow, removed 5 redundant places. [2022-11-21 16:14:42,702 INFO L231 Difference]: Finished difference. Result has 156 places, 142 transitions, 365 flow [2022-11-21 16:14:42,702 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=169, PETRI_DIFFERENCE_MINUEND_FLOW=343, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=365, PETRI_PLACES=156, PETRI_TRANSITIONS=142} [2022-11-21 16:14:42,704 INFO L288 CegarLoopForPetriNet]: 142 programPoint places, 14 predicate places. [2022-11-21 16:14:42,704 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 142 transitions, 365 flow [2022-11-21 16:14:42,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 137.33333333333334) internal successors, (824), 6 states have internal predecessors, (824), 0 states have call successors, (0), 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 16:14:42,705 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:14:42,705 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] [2022-11-21 16:14:42,715 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9521d75d-5a05-4a74-a103-2fd821f09e3f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-21 16:14:42,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9521d75d-5a05-4a74-a103-2fd821f09e3f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:14:42,916 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2022-11-21 16:14:42,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:14:42,916 INFO L85 PathProgramCache]: Analyzing trace with hash 626373551, now seen corresponding path program 1 times [2022-11-21 16:14:42,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:14:42,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764714716] [2022-11-21 16:14:42,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:14:42,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:14:42,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:14:43,116 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 16:14:43,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:14:43,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764714716] [2022-11-21 16:14:43,117 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764714716] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:14:43,117 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:14:43,117 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-21 16:14:43,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673626061] [2022-11-21 16:14:43,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:14:43,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-21 16:14:43,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:14:43,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-21 16:14:43,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-21 16:14:43,121 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 169 [2022-11-21 16:14:43,122 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 142 transitions, 365 flow. Second operand has 6 states, 6 states have (on average 135.0) internal successors, (810), 6 states have internal predecessors, (810), 0 states have call successors, (0), 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 16:14:43,122 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:14:43,122 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 169 [2022-11-21 16:14:43,122 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 16:14:43,462 INFO L130 PetriNetUnfolder]: 322/1178 cut-off events. [2022-11-21 16:14:43,463 INFO L131 PetriNetUnfolder]: For 85/85 co-relation queries the response was YES. [2022-11-21 16:14:43,467 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1862 conditions, 1178 events. 322/1178 cut-off events. For 85/85 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 7009 event pairs, 144 based on Foata normal form. 6/848 useless extension candidates. Maximal degree in co-relation 1704. Up to 469 conditions per place. [2022-11-21 16:14:43,475 INFO L137 encePairwiseOnDemand]: 158/169 looper letters, 28 selfloop transitions, 6 changer transitions 5/149 dead transitions. [2022-11-21 16:14:43,475 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 149 transitions, 463 flow [2022-11-21 16:14:43,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-21 16:14:43,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-21 16:14:43,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 968 transitions. [2022-11-21 16:14:43,479 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8182586644125106 [2022-11-21 16:14:43,479 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 968 transitions. [2022-11-21 16:14:43,479 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 968 transitions. [2022-11-21 16:14:43,480 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 16:14:43,480 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 968 transitions. [2022-11-21 16:14:43,483 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 138.28571428571428) internal successors, (968), 7 states have internal predecessors, (968), 0 states have call successors, (0), 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 16:14:43,485 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 169.0) internal successors, (1352), 8 states have internal predecessors, (1352), 0 states have call successors, (0), 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 16:14:43,486 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 169.0) internal successors, (1352), 8 states have internal predecessors, (1352), 0 states have call successors, (0), 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 16:14:43,486 INFO L175 Difference]: Start difference. First operand has 156 places, 142 transitions, 365 flow. Second operand 7 states and 968 transitions. [2022-11-21 16:14:43,487 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 149 transitions, 463 flow [2022-11-21 16:14:43,490 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 149 transitions, 449 flow, removed 0 selfloop flow, removed 5 redundant places. [2022-11-21 16:14:43,493 INFO L231 Difference]: Finished difference. Result has 159 places, 142 transitions, 375 flow [2022-11-21 16:14:43,494 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=169, PETRI_DIFFERENCE_MINUEND_FLOW=351, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=375, PETRI_PLACES=159, PETRI_TRANSITIONS=142} [2022-11-21 16:14:43,496 INFO L288 CegarLoopForPetriNet]: 142 programPoint places, 17 predicate places. [2022-11-21 16:14:43,496 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 142 transitions, 375 flow [2022-11-21 16:14:43,497 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 135.0) internal successors, (810), 6 states have internal predecessors, (810), 0 states have call successors, (0), 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 16:14:43,497 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:14:43,497 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] [2022-11-21 16:14:43,497 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-21 16:14:43,498 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2022-11-21 16:14:43,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:14:43,499 INFO L85 PathProgramCache]: Analyzing trace with hash 895833096, now seen corresponding path program 1 times [2022-11-21 16:14:43,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:14:43,499 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103521104] [2022-11-21 16:14:43,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:14:43,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:14:43,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:14:43,803 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 16:14:43,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:14:43,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103521104] [2022-11-21 16:14:43,804 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103521104] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:14:43,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [934515293] [2022-11-21 16:14:43,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:14:43,805 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:14:43,805 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9521d75d-5a05-4a74-a103-2fd821f09e3f/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:14:43,806 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9521d75d-5a05-4a74-a103-2fd821f09e3f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:14:43,821 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9521d75d-5a05-4a74-a103-2fd821f09e3f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-21 16:14:43,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:14:43,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-21 16:14:43,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:14:44,050 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 16:14:44,050 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-21 16:14:44,051 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [934515293] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:14:44,051 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-21 16:14:44,051 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 9 [2022-11-21 16:14:44,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744871870] [2022-11-21 16:14:44,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:14:44,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-21 16:14:44,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:14:44,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-21 16:14:44,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-11-21 16:14:44,055 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 169 [2022-11-21 16:14:44,056 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 142 transitions, 375 flow. Second operand has 4 states, 4 states have (on average 143.0) internal successors, (572), 4 states have internal predecessors, (572), 0 states have call successors, (0), 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 16:14:44,056 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:14:44,056 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 169 [2022-11-21 16:14:44,056 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 16:14:44,216 INFO L130 PetriNetUnfolder]: 157/803 cut-off events. [2022-11-21 16:14:44,216 INFO L131 PetriNetUnfolder]: For 143/159 co-relation queries the response was YES. [2022-11-21 16:14:44,219 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1272 conditions, 803 events. 157/803 cut-off events. For 143/159 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 4357 event pairs, 68 based on Foata normal form. 0/659 useless extension candidates. Maximal degree in co-relation 1181. Up to 224 conditions per place. [2022-11-21 16:14:44,223 INFO L137 encePairwiseOnDemand]: 164/169 looper letters, 11 selfloop transitions, 3 changer transitions 0/140 dead transitions. [2022-11-21 16:14:44,223 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 140 transitions, 395 flow [2022-11-21 16:14:44,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-21 16:14:44,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-21 16:14:44,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 580 transitions. [2022-11-21 16:14:44,226 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8579881656804734 [2022-11-21 16:14:44,226 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 580 transitions. [2022-11-21 16:14:44,226 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 580 transitions. [2022-11-21 16:14:44,227 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 16:14:44,227 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 580 transitions. [2022-11-21 16:14:44,228 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 145.0) internal successors, (580), 4 states have internal predecessors, (580), 0 states have call successors, (0), 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 16:14:44,230 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 169.0) internal successors, (845), 5 states have internal predecessors, (845), 0 states have call successors, (0), 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 16:14:44,230 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 169.0) internal successors, (845), 5 states have internal predecessors, (845), 0 states have call successors, (0), 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 16:14:44,230 INFO L175 Difference]: Start difference. First operand has 159 places, 142 transitions, 375 flow. Second operand 4 states and 580 transitions. [2022-11-21 16:14:44,231 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 140 transitions, 395 flow [2022-11-21 16:14:44,233 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 140 transitions, 383 flow, removed 0 selfloop flow, removed 5 redundant places. [2022-11-21 16:14:44,235 INFO L231 Difference]: Finished difference. Result has 154 places, 140 transitions, 361 flow [2022-11-21 16:14:44,236 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=169, PETRI_DIFFERENCE_MINUEND_FLOW=355, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=361, PETRI_PLACES=154, PETRI_TRANSITIONS=140} [2022-11-21 16:14:44,239 INFO L288 CegarLoopForPetriNet]: 142 programPoint places, 12 predicate places. [2022-11-21 16:14:44,239 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 140 transitions, 361 flow [2022-11-21 16:14:44,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 143.0) internal successors, (572), 4 states have internal predecessors, (572), 0 states have call successors, (0), 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 16:14:44,240 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:14:44,240 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] [2022-11-21 16:14:44,251 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9521d75d-5a05-4a74-a103-2fd821f09e3f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-11-21 16:14:44,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9521d75d-5a05-4a74-a103-2fd821f09e3f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:14:44,446 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2022-11-21 16:14:44,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:14:44,447 INFO L85 PathProgramCache]: Analyzing trace with hash 1902163627, now seen corresponding path program 1 times [2022-11-21 16:14:44,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:14:44,447 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216612973] [2022-11-21 16:14:44,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:14:44,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:14:44,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:14:44,553 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 16:14:44,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:14:44,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216612973] [2022-11-21 16:14:44,554 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1216612973] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:14:44,554 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:14:44,554 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-21 16:14:44,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020618958] [2022-11-21 16:14:44,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:14:44,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-21 16:14:44,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:14:44,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-21 16:14:44,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-21 16:14:44,557 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 169 [2022-11-21 16:14:44,558 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 140 transitions, 361 flow. Second operand has 6 states, 6 states have (on average 132.0) internal successors, (792), 6 states have internal predecessors, (792), 0 states have call successors, (0), 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 16:14:44,558 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:14:44,558 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 169 [2022-11-21 16:14:44,558 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 16:14:45,061 INFO L130 PetriNetUnfolder]: 909/2227 cut-off events. [2022-11-21 16:14:45,062 INFO L131 PetriNetUnfolder]: For 338/354 co-relation queries the response was YES. [2022-11-21 16:14:45,070 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4428 conditions, 2227 events. 909/2227 cut-off events. For 338/354 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 15086 event pairs, 304 based on Foata normal form. 0/1839 useless extension candidates. Maximal degree in co-relation 4382. Up to 680 conditions per place. [2022-11-21 16:14:45,082 INFO L137 encePairwiseOnDemand]: 162/169 looper letters, 30 selfloop transitions, 6 changer transitions 0/151 dead transitions. [2022-11-21 16:14:45,082 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 151 transitions, 467 flow [2022-11-21 16:14:45,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-21 16:14:45,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-21 16:14:45,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 817 transitions. [2022-11-21 16:14:45,086 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8057199211045365 [2022-11-21 16:14:45,086 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 817 transitions. [2022-11-21 16:14:45,087 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 817 transitions. [2022-11-21 16:14:45,087 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 16:14:45,088 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 817 transitions. [2022-11-21 16:14:45,089 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 136.16666666666666) internal successors, (817), 6 states have internal predecessors, (817), 0 states have call successors, (0), 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 16:14:45,092 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 169.0) internal successors, (1183), 7 states have internal predecessors, (1183), 0 states have call successors, (0), 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 16:14:45,093 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 169.0) internal successors, (1183), 7 states have internal predecessors, (1183), 0 states have call successors, (0), 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 16:14:45,093 INFO L175 Difference]: Start difference. First operand has 154 places, 140 transitions, 361 flow. Second operand 6 states and 817 transitions. [2022-11-21 16:14:45,093 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 151 transitions, 467 flow [2022-11-21 16:14:45,095 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 151 transitions, 461 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-11-21 16:14:45,097 INFO L231 Difference]: Finished difference. Result has 155 places, 139 transitions, 365 flow [2022-11-21 16:14:45,098 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=169, PETRI_DIFFERENCE_MINUEND_FLOW=353, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=365, PETRI_PLACES=155, PETRI_TRANSITIONS=139} [2022-11-21 16:14:45,101 INFO L288 CegarLoopForPetriNet]: 142 programPoint places, 13 predicate places. [2022-11-21 16:14:45,101 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 139 transitions, 365 flow [2022-11-21 16:14:45,102 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 132.0) internal successors, (792), 6 states have internal predecessors, (792), 0 states have call successors, (0), 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 16:14:45,102 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:14:45,102 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] [2022-11-21 16:14:45,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-21 16:14:45,104 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2022-11-21 16:14:45,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:14:45,104 INFO L85 PathProgramCache]: Analyzing trace with hash -1162469184, now seen corresponding path program 1 times [2022-11-21 16:14:45,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:14:45,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644907445] [2022-11-21 16:14:45,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:14:45,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:14:45,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:14:45,184 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 16:14:45,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:14:45,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644907445] [2022-11-21 16:14:45,184 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644907445] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:14:45,185 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:14:45,185 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 16:14:45,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112046441] [2022-11-21 16:14:45,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:14:45,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-21 16:14:45,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:14:45,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-21 16:14:45,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-21 16:14:45,187 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 169 [2022-11-21 16:14:45,188 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 139 transitions, 365 flow. Second operand has 4 states, 4 states have (on average 138.75) internal successors, (555), 4 states have internal predecessors, (555), 0 states have call successors, (0), 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 16:14:45,188 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:14:45,188 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 169 [2022-11-21 16:14:45,189 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 16:14:45,471 INFO L130 PetriNetUnfolder]: 505/1499 cut-off events. [2022-11-21 16:14:45,472 INFO L131 PetriNetUnfolder]: For 258/258 co-relation queries the response was YES. [2022-11-21 16:14:45,476 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3071 conditions, 1499 events. 505/1499 cut-off events. For 258/258 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 10027 event pairs, 112 based on Foata normal form. 0/1283 useless extension candidates. Maximal degree in co-relation 2984. Up to 297 conditions per place. [2022-11-21 16:14:45,484 INFO L137 encePairwiseOnDemand]: 164/169 looper letters, 28 selfloop transitions, 4 changer transitions 0/154 dead transitions. [2022-11-21 16:14:45,484 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 154 transitions, 478 flow [2022-11-21 16:14:45,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-21 16:14:45,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-21 16:14:45,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 718 transitions. [2022-11-21 16:14:45,487 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8497041420118343 [2022-11-21 16:14:45,488 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 718 transitions. [2022-11-21 16:14:45,488 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 718 transitions. [2022-11-21 16:14:45,488 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 16:14:45,488 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 718 transitions. [2022-11-21 16:14:45,490 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 143.6) internal successors, (718), 5 states have internal predecessors, (718), 0 states have call successors, (0), 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 16:14:45,492 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 169.0) internal successors, (1014), 6 states have internal predecessors, (1014), 0 states have call successors, (0), 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 16:14:45,493 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 169.0) internal successors, (1014), 6 states have internal predecessors, (1014), 0 states have call successors, (0), 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 16:14:45,493 INFO L175 Difference]: Start difference. First operand has 155 places, 139 transitions, 365 flow. Second operand 5 states and 718 transitions. [2022-11-21 16:14:45,493 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 154 transitions, 478 flow [2022-11-21 16:14:45,495 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 154 transitions, 466 flow, removed 0 selfloop flow, removed 5 redundant places. [2022-11-21 16:14:45,497 INFO L231 Difference]: Finished difference. Result has 153 places, 138 transitions, 359 flow [2022-11-21 16:14:45,498 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=169, PETRI_DIFFERENCE_MINUEND_FLOW=351, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=359, PETRI_PLACES=153, PETRI_TRANSITIONS=138} [2022-11-21 16:14:45,498 INFO L288 CegarLoopForPetriNet]: 142 programPoint places, 11 predicate places. [2022-11-21 16:14:45,498 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 138 transitions, 359 flow [2022-11-21 16:14:45,499 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 138.75) internal successors, (555), 4 states have internal predecessors, (555), 0 states have call successors, (0), 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 16:14:45,499 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:14:45,499 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] [2022-11-21 16:14:45,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-21 16:14:45,500 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2022-11-21 16:14:45,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:14:45,500 INFO L85 PathProgramCache]: Analyzing trace with hash -547058750, now seen corresponding path program 1 times [2022-11-21 16:14:45,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:14:45,501 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522610141] [2022-11-21 16:14:45,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:14:45,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:14:45,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:14:45,705 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 16:14:45,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:14:45,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522610141] [2022-11-21 16:14:45,706 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522610141] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:14:45,706 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:14:45,706 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 16:14:45,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129330649] [2022-11-21 16:14:45,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:14:45,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 16:14:45,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:14:45,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 16:14:45,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 16:14:45,708 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 169 [2022-11-21 16:14:45,710 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 138 transitions, 359 flow. Second operand has 3 states, 3 states have (on average 143.33333333333334) internal successors, (430), 3 states have internal predecessors, (430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:14:45,710 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:14:45,710 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 169 [2022-11-21 16:14:45,710 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 16:14:45,856 INFO L130 PetriNetUnfolder]: 97/767 cut-off events. [2022-11-21 16:14:45,856 INFO L131 PetriNetUnfolder]: For 146/178 co-relation queries the response was YES. [2022-11-21 16:14:45,858 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1199 conditions, 767 events. 97/767 cut-off events. For 146/178 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 4289 event pairs, 24 based on Foata normal form. 16/679 useless extension candidates. Maximal degree in co-relation 1108. Up to 168 conditions per place. [2022-11-21 16:14:45,861 INFO L137 encePairwiseOnDemand]: 164/169 looper letters, 14 selfloop transitions, 4 changer transitions 1/142 dead transitions. [2022-11-21 16:14:45,861 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 142 transitions, 412 flow [2022-11-21 16:14:45,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 16:14:45,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-21 16:14:45,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 440 transitions. [2022-11-21 16:14:45,863 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8678500986193294 [2022-11-21 16:14:45,864 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 440 transitions. [2022-11-21 16:14:45,864 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 440 transitions. [2022-11-21 16:14:45,864 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 16:14:45,864 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 440 transitions. [2022-11-21 16:14:45,865 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 146.66666666666666) internal successors, (440), 3 states have internal predecessors, (440), 0 states have call successors, (0), 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 16:14:45,867 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 169.0) internal successors, (676), 4 states have internal predecessors, (676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:14:45,867 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 169.0) internal successors, (676), 4 states have internal predecessors, (676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:14:45,867 INFO L175 Difference]: Start difference. First operand has 153 places, 138 transitions, 359 flow. Second operand 3 states and 440 transitions. [2022-11-21 16:14:45,867 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 142 transitions, 412 flow [2022-11-21 16:14:45,869 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 142 transitions, 404 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-11-21 16:14:45,872 INFO L231 Difference]: Finished difference. Result has 152 places, 139 transitions, 371 flow [2022-11-21 16:14:45,872 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=169, PETRI_DIFFERENCE_MINUEND_FLOW=351, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=371, PETRI_PLACES=152, PETRI_TRANSITIONS=139} [2022-11-21 16:14:45,874 INFO L288 CegarLoopForPetriNet]: 142 programPoint places, 10 predicate places. [2022-11-21 16:14:45,875 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 139 transitions, 371 flow [2022-11-21 16:14:45,875 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 143.33333333333334) internal successors, (430), 3 states have internal predecessors, (430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:14:45,875 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:14:45,876 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] [2022-11-21 16:14:45,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-21 16:14:45,877 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2022-11-21 16:14:45,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:14:45,877 INFO L85 PathProgramCache]: Analyzing trace with hash 1683749574, now seen corresponding path program 1 times [2022-11-21 16:14:45,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:14:45,882 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582577431] [2022-11-21 16:14:45,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:14:45,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:14:45,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:14:48,137 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 16:14:48,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:14:48,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582577431] [2022-11-21 16:14:48,138 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582577431] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:14:48,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1930438210] [2022-11-21 16:14:48,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:14:48,138 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:14:48,138 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9521d75d-5a05-4a74-a103-2fd821f09e3f/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:14:48,142 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9521d75d-5a05-4a74-a103-2fd821f09e3f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:14:48,167 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9521d75d-5a05-4a74-a103-2fd821f09e3f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-21 16:14:48,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:14:48,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-21 16:14:48,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:14:49,077 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 16:14:50,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 16:14:50,272 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 16:14:50,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 16:14:50,507 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 16:14:50,894 INFO L321 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-11-21 16:14:50,894 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 10 [2022-11-21 16:14:50,950 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 16:14:50,950 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:14:58,160 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-21 16:14:58,161 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 16:14:58,176 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-21 16:14:58,176 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 88 treesize of output 84 [2022-11-21 16:14:58,183 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 56 [2022-11-21 16:14:58,191 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2022-11-21 16:15:00,293 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 16:15:00,294 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1930438210] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:15:00,294 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:15:00,294 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 63 [2022-11-21 16:15:00,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543633782] [2022-11-21 16:15:00,294 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:15:00,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-11-21 16:15:00,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:15:00,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-11-21 16:15:00,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=326, Invalid=3704, Unknown=2, NotChecked=0, Total=4032 [2022-11-21 16:15:00,305 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 169 [2022-11-21 16:15:00,312 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 139 transitions, 371 flow. Second operand has 64 states, 64 states have (on average 94.96875) internal successors, (6078), 64 states have internal predecessors, (6078), 0 states have call successors, (0), 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 16:15:00,312 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:15:00,312 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 169 [2022-11-21 16:15:00,312 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 16:15:10,544 INFO L130 PetriNetUnfolder]: 1284/3688 cut-off events. [2022-11-21 16:15:10,544 INFO L131 PetriNetUnfolder]: For 1599/1985 co-relation queries the response was YES. [2022-11-21 16:15:10,558 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7036 conditions, 3688 events. 1284/3688 cut-off events. For 1599/1985 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 28120 event pairs, 93 based on Foata normal form. 0/3146 useless extension candidates. Maximal degree in co-relation 6913. Up to 574 conditions per place. [2022-11-21 16:15:10,580 INFO L137 encePairwiseOnDemand]: 137/169 looper letters, 136 selfloop transitions, 58 changer transitions 2/266 dead transitions. [2022-11-21 16:15:10,581 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 266 transitions, 1146 flow [2022-11-21 16:15:10,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-11-21 16:15:10,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2022-11-21 16:15:10,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 3816 transitions. [2022-11-21 16:15:10,591 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5789713245334547 [2022-11-21 16:15:10,591 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 3816 transitions. [2022-11-21 16:15:10,591 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 3816 transitions. [2022-11-21 16:15:10,594 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 16:15:10,594 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 3816 transitions. [2022-11-21 16:15:10,603 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 97.84615384615384) internal successors, (3816), 39 states have internal predecessors, (3816), 0 states have call successors, (0), 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 16:15:10,614 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 169.0) internal successors, (6760), 40 states have internal predecessors, (6760), 0 states have call successors, (0), 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 16:15:10,618 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 169.0) internal successors, (6760), 40 states have internal predecessors, (6760), 0 states have call successors, (0), 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 16:15:10,618 INFO L175 Difference]: Start difference. First operand has 152 places, 139 transitions, 371 flow. Second operand 39 states and 3816 transitions. [2022-11-21 16:15:10,618 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 266 transitions, 1146 flow [2022-11-21 16:15:10,622 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 266 transitions, 1095 flow, removed 23 selfloop flow, removed 2 redundant places. [2022-11-21 16:15:10,627 INFO L231 Difference]: Finished difference. Result has 205 places, 176 transitions, 693 flow [2022-11-21 16:15:10,627 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=169, PETRI_DIFFERENCE_MINUEND_FLOW=361, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=693, PETRI_PLACES=205, PETRI_TRANSITIONS=176} [2022-11-21 16:15:10,629 INFO L288 CegarLoopForPetriNet]: 142 programPoint places, 63 predicate places. [2022-11-21 16:15:10,629 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 176 transitions, 693 flow [2022-11-21 16:15:10,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 94.96875) internal successors, (6078), 64 states have internal predecessors, (6078), 0 states have call successors, (0), 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 16:15:10,649 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:15:10,649 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] [2022-11-21 16:15:10,664 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9521d75d-5a05-4a74-a103-2fd821f09e3f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-21 16:15:10,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9521d75d-5a05-4a74-a103-2fd821f09e3f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:15:10,856 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2022-11-21 16:15:10,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:15:10,856 INFO L85 PathProgramCache]: Analyzing trace with hash 1915962551, now seen corresponding path program 1 times [2022-11-21 16:15:10,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:15:10,857 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266539799] [2022-11-21 16:15:10,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:15:10,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:15:10,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:15:12,207 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 16:15:12,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:15:12,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266539799] [2022-11-21 16:15:12,208 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266539799] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:15:12,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [816091919] [2022-11-21 16:15:12,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:15:12,208 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:15:12,208 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9521d75d-5a05-4a74-a103-2fd821f09e3f/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:15:12,210 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9521d75d-5a05-4a74-a103-2fd821f09e3f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:15:12,239 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9521d75d-5a05-4a74-a103-2fd821f09e3f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-21 16:15:12,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:15:12,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-21 16:15:12,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:15:13,074 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 16:15:14,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 16:15:14,093 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 20 treesize of output 22 [2022-11-21 16:15:14,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 16:15:14,361 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 20 treesize of output 22 [2022-11-21 16:15:14,600 INFO L321 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-11-21 16:15:14,601 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 12 [2022-11-21 16:15:14,646 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 16:15:14,646 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:15:17,666 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-21 16:15:17,667 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 32 treesize of output 33 [2022-11-21 16:15:17,680 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-21 16:15:17,681 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 182 treesize of output 170 [2022-11-21 16:15:17,688 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 154 treesize of output 142 [2022-11-21 16:15:17,696 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 142 treesize of output 118 [2022-11-21 16:15:19,537 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 16:15:19,538 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [816091919] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:15:19,538 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:15:19,538 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 22, 22] total 58 [2022-11-21 16:15:19,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849629254] [2022-11-21 16:15:19,538 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:15:19,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-11-21 16:15:19,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:15:19,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-11-21 16:15:19,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=252, Invalid=3167, Unknown=3, NotChecked=0, Total=3422 [2022-11-21 16:15:19,545 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 169 [2022-11-21 16:15:19,551 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 176 transitions, 693 flow. Second operand has 59 states, 59 states have (on average 95.13559322033899) internal successors, (5613), 59 states have internal predecessors, (5613), 0 states have call successors, (0), 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 16:15:19,551 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:15:19,552 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 169 [2022-11-21 16:15:19,552 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 16:15:33,561 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-21 16:15:59,999 INFO L130 PetriNetUnfolder]: 1785/5134 cut-off events. [2022-11-21 16:16:00,000 INFO L131 PetriNetUnfolder]: For 9469/10234 co-relation queries the response was YES. [2022-11-21 16:16:00,026 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12473 conditions, 5134 events. 1785/5134 cut-off events. For 9469/10234 co-relation queries the response was YES. Maximal size of possible extension queue 197. Compared 44162 event pairs, 182 based on Foata normal form. 277/4958 useless extension candidates. Maximal degree in co-relation 12313. Up to 842 conditions per place. [2022-11-21 16:16:00,054 INFO L137 encePairwiseOnDemand]: 136/169 looper letters, 240 selfloop transitions, 111 changer transitions 4/425 dead transitions. [2022-11-21 16:16:00,054 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 425 transitions, 2571 flow [2022-11-21 16:16:00,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-11-21 16:16:00,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2022-11-21 16:16:00,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 5638 transitions. [2022-11-21 16:16:00,069 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5852797674660023 [2022-11-21 16:16:00,069 INFO L72 ComplementDD]: Start complementDD. Operand 57 states and 5638 transitions. [2022-11-21 16:16:00,069 INFO L73 IsDeterministic]: Start isDeterministic. Operand 57 states and 5638 transitions. [2022-11-21 16:16:00,072 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 16:16:00,072 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 57 states and 5638 transitions. [2022-11-21 16:16:00,086 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 58 states, 57 states have (on average 98.91228070175438) internal successors, (5638), 57 states have internal predecessors, (5638), 0 states have call successors, (0), 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 16:16:00,102 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 58 states, 58 states have (on average 169.0) internal successors, (9802), 58 states have internal predecessors, (9802), 0 states have call successors, (0), 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 16:16:00,105 INFO L81 ComplementDD]: Finished complementDD. Result has 58 states, 58 states have (on average 169.0) internal successors, (9802), 58 states have internal predecessors, (9802), 0 states have call successors, (0), 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 16:16:00,106 INFO L175 Difference]: Start difference. First operand has 205 places, 176 transitions, 693 flow. Second operand 57 states and 5638 transitions. [2022-11-21 16:16:00,106 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 425 transitions, 2571 flow [2022-11-21 16:16:00,134 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 425 transitions, 2521 flow, removed 8 selfloop flow, removed 15 redundant places. [2022-11-21 16:16:00,139 INFO L231 Difference]: Finished difference. Result has 263 places, 239 transitions, 1472 flow [2022-11-21 16:16:00,140 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=169, PETRI_DIFFERENCE_MINUEND_FLOW=648, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=57, PETRI_FLOW=1472, PETRI_PLACES=263, PETRI_TRANSITIONS=239} [2022-11-21 16:16:00,141 INFO L288 CegarLoopForPetriNet]: 142 programPoint places, 121 predicate places. [2022-11-21 16:16:00,141 INFO L495 AbstractCegarLoop]: Abstraction has has 263 places, 239 transitions, 1472 flow [2022-11-21 16:16:00,145 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 95.13559322033899) internal successors, (5613), 59 states have internal predecessors, (5613), 0 states have call successors, (0), 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 16:16:00,145 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:16:00,145 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] [2022-11-21 16:16:00,151 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9521d75d-5a05-4a74-a103-2fd821f09e3f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-21 16:16:00,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9521d75d-5a05-4a74-a103-2fd821f09e3f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-21 16:16:00,352 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2022-11-21 16:16:00,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:16:00,352 INFO L85 PathProgramCache]: Analyzing trace with hash 858237681, now seen corresponding path program 2 times [2022-11-21 16:16:00,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:16:00,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405864234] [2022-11-21 16:16:00,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:16:00,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:16:00,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:16:01,835 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 16:16:01,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:16:01,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405864234] [2022-11-21 16:16:01,836 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405864234] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:16:01,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1967674067] [2022-11-21 16:16:01,836 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-21 16:16:01,836 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:16:01,836 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9521d75d-5a05-4a74-a103-2fd821f09e3f/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:16:01,837 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9521d75d-5a05-4a74-a103-2fd821f09e3f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:16:01,848 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9521d75d-5a05-4a74-a103-2fd821f09e3f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-21 16:16:01,993 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-21 16:16:01,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:16:01,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-21 16:16:01,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:16:02,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 16:16:02,867 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 16:16:02,942 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 16:16:02,985 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 16:16:02,985 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-21 16:16:02,985 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1967674067] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:16:02,985 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-21 16:16:02,985 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [18] total 29 [2022-11-21 16:16:02,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721563228] [2022-11-21 16:16:02,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:16:02,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-21 16:16:02,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:16:02,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-21 16:16:02,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=755, Unknown=0, NotChecked=0, Total=870 [2022-11-21 16:16:02,988 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 169 [2022-11-21 16:16:02,990 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 239 transitions, 1472 flow. Second operand has 13 states, 13 states have (on average 115.38461538461539) internal successors, (1500), 13 states have internal predecessors, (1500), 0 states have call successors, (0), 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 16:16:02,990 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:16:02,990 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 169 [2022-11-21 16:16:02,990 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 16:16:05,033 INFO L130 PetriNetUnfolder]: 2475/6959 cut-off events. [2022-11-21 16:16:05,033 INFO L131 PetriNetUnfolder]: For 39217/40710 co-relation queries the response was YES. [2022-11-21 16:16:05,063 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22155 conditions, 6959 events. 2475/6959 cut-off events. For 39217/40710 co-relation queries the response was YES. Maximal size of possible extension queue 246. Compared 62961 event pairs, 558 based on Foata normal form. 138/6412 useless extension candidates. Maximal degree in co-relation 21990. Up to 1349 conditions per place. [2022-11-21 16:16:05,105 INFO L137 encePairwiseOnDemand]: 154/169 looper letters, 141 selfloop transitions, 52 changer transitions 2/298 dead transitions. [2022-11-21 16:16:05,106 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 298 transitions, 2357 flow [2022-11-21 16:16:05,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-21 16:16:05,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-11-21 16:16:05,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1662 transitions. [2022-11-21 16:16:05,109 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.702451394759087 [2022-11-21 16:16:05,110 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1662 transitions. [2022-11-21 16:16:05,110 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1662 transitions. [2022-11-21 16:16:05,111 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 16:16:05,111 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1662 transitions. [2022-11-21 16:16:05,114 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 118.71428571428571) internal successors, (1662), 14 states have internal predecessors, (1662), 0 states have call successors, (0), 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 16:16:05,117 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 169.0) internal successors, (2535), 15 states have internal predecessors, (2535), 0 states have call successors, (0), 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 16:16:05,118 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 169.0) internal successors, (2535), 15 states have internal predecessors, (2535), 0 states have call successors, (0), 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 16:16:05,118 INFO L175 Difference]: Start difference. First operand has 263 places, 239 transitions, 1472 flow. Second operand 14 states and 1662 transitions. [2022-11-21 16:16:05,118 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 298 transitions, 2357 flow [2022-11-21 16:16:05,371 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 298 transitions, 2119 flow, removed 85 selfloop flow, removed 27 redundant places. [2022-11-21 16:16:05,375 INFO L231 Difference]: Finished difference. Result has 252 places, 255 transitions, 1620 flow [2022-11-21 16:16:05,376 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=169, PETRI_DIFFERENCE_MINUEND_FLOW=1251, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=237, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1620, PETRI_PLACES=252, PETRI_TRANSITIONS=255} [2022-11-21 16:16:05,376 INFO L288 CegarLoopForPetriNet]: 142 programPoint places, 110 predicate places. [2022-11-21 16:16:05,376 INFO L495 AbstractCegarLoop]: Abstraction has has 252 places, 255 transitions, 1620 flow [2022-11-21 16:16:05,377 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 115.38461538461539) internal successors, (1500), 13 states have internal predecessors, (1500), 0 states have call successors, (0), 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 16:16:05,377 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:16:05,378 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] [2022-11-21 16:16:05,384 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9521d75d-5a05-4a74-a103-2fd821f09e3f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-21 16:16:05,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9521d75d-5a05-4a74-a103-2fd821f09e3f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-21 16:16:05,584 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2022-11-21 16:16:05,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:16:05,584 INFO L85 PathProgramCache]: Analyzing trace with hash 346653692, now seen corresponding path program 2 times [2022-11-21 16:16:05,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:16:05,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65317982] [2022-11-21 16:16:05,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:16:05,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:16:05,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:16:05,821 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 16:16:05,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:16:05,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65317982] [2022-11-21 16:16:05,821 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [65317982] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:16:05,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [950487677] [2022-11-21 16:16:05,821 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-21 16:16:05,822 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:16:05,822 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9521d75d-5a05-4a74-a103-2fd821f09e3f/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:16:05,823 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9521d75d-5a05-4a74-a103-2fd821f09e3f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:16:05,846 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9521d75d-5a05-4a74-a103-2fd821f09e3f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-21 16:16:05,913 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-21 16:16:05,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:16:05,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-21 16:16:05,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:16:06,267 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 16:16:06,267 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:16:06,551 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 16:16:06,552 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [950487677] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:16:06,552 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:16:06,552 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 7] total 17 [2022-11-21 16:16:06,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090530604] [2022-11-21 16:16:06,552 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:16:06,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-21 16:16:06,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:16:06,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-21 16:16:06,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2022-11-21 16:16:06,556 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 125 out of 169 [2022-11-21 16:16:06,559 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 255 transitions, 1620 flow. Second operand has 18 states, 18 states have (on average 128.61111111111111) internal successors, (2315), 18 states have internal predecessors, (2315), 0 states have call successors, (0), 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 16:16:06,559 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:16:06,560 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 125 of 169 [2022-11-21 16:16:06,560 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 16:16:08,232 INFO L130 PetriNetUnfolder]: 842/3580 cut-off events. [2022-11-21 16:16:08,233 INFO L131 PetriNetUnfolder]: For 21365/21758 co-relation queries the response was YES. [2022-11-21 16:16:08,245 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11573 conditions, 3580 events. 842/3580 cut-off events. For 21365/21758 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 30568 event pairs, 205 based on Foata normal form. 5/3199 useless extension candidates. Maximal degree in co-relation 11422. Up to 535 conditions per place. [2022-11-21 16:16:08,265 INFO L137 encePairwiseOnDemand]: 158/169 looper letters, 223 selfloop transitions, 25 changer transitions 0/377 dead transitions. [2022-11-21 16:16:08,265 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 377 transitions, 3167 flow [2022-11-21 16:16:08,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-21 16:16:08,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2022-11-21 16:16:08,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 3111 transitions. [2022-11-21 16:16:08,271 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7670118343195266 [2022-11-21 16:16:08,272 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 3111 transitions. [2022-11-21 16:16:08,272 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 3111 transitions. [2022-11-21 16:16:08,274 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 16:16:08,274 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 3111 transitions. [2022-11-21 16:16:08,279 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 129.625) internal successors, (3111), 24 states have internal predecessors, (3111), 0 states have call successors, (0), 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 16:16:08,286 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 169.0) internal successors, (4225), 25 states have internal predecessors, (4225), 0 states have call successors, (0), 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 16:16:08,287 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 169.0) internal successors, (4225), 25 states have internal predecessors, (4225), 0 states have call successors, (0), 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 16:16:08,287 INFO L175 Difference]: Start difference. First operand has 252 places, 255 transitions, 1620 flow. Second operand 24 states and 3111 transitions. [2022-11-21 16:16:08,287 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 377 transitions, 3167 flow [2022-11-21 16:16:08,385 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 377 transitions, 3084 flow, removed 15 selfloop flow, removed 13 redundant places. [2022-11-21 16:16:08,390 INFO L231 Difference]: Finished difference. Result has 262 places, 259 transitions, 1633 flow [2022-11-21 16:16:08,391 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=169, PETRI_DIFFERENCE_MINUEND_FLOW=1546, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=254, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=233, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=1633, PETRI_PLACES=262, PETRI_TRANSITIONS=259} [2022-11-21 16:16:08,391 INFO L288 CegarLoopForPetriNet]: 142 programPoint places, 120 predicate places. [2022-11-21 16:16:08,392 INFO L495 AbstractCegarLoop]: Abstraction has has 262 places, 259 transitions, 1633 flow [2022-11-21 16:16:08,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 128.61111111111111) internal successors, (2315), 18 states have internal predecessors, (2315), 0 states have call successors, (0), 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 16:16:08,393 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:16:08,393 INFO L209 CegarLoopForPetriNet]: trace histogram [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] [2022-11-21 16:16:08,405 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9521d75d-5a05-4a74-a103-2fd821f09e3f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-21 16:16:08,599 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9521d75d-5a05-4a74-a103-2fd821f09e3f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:16:08,599 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2022-11-21 16:16:08,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:16:08,600 INFO L85 PathProgramCache]: Analyzing trace with hash -1709940178, now seen corresponding path program 1 times [2022-11-21 16:16:08,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:16:08,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628184383] [2022-11-21 16:16:08,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:16:08,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:16:08,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:16:08,781 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-21 16:16:08,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:16:08,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628184383] [2022-11-21 16:16:08,781 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628184383] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:16:08,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [370616341] [2022-11-21 16:16:08,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:16:08,782 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:16:08,782 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9521d75d-5a05-4a74-a103-2fd821f09e3f/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:16:08,784 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9521d75d-5a05-4a74-a103-2fd821f09e3f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:16:08,811 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9521d75d-5a05-4a74-a103-2fd821f09e3f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-21 16:16:08,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:16:08,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-21 16:16:08,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:16:09,574 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:16:09,574 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:16:10,676 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:16:10,676 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [370616341] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:16:10,676 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:16:10,677 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 11, 11] total 22 [2022-11-21 16:16:10,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693635321] [2022-11-21 16:16:10,677 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:16:10,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-21 16:16:10,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:16:10,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-21 16:16:10,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=343, Unknown=0, NotChecked=0, Total=462 [2022-11-21 16:16:10,680 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 124 out of 169 [2022-11-21 16:16:10,685 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 259 transitions, 1633 flow. Second operand has 22 states, 22 states have (on average 127.22727272727273) internal successors, (2799), 22 states have internal predecessors, (2799), 0 states have call successors, (0), 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 16:16:10,685 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:16:10,685 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 124 of 169 [2022-11-21 16:16:10,685 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 16:16:12,922 INFO L130 PetriNetUnfolder]: 1432/7038 cut-off events. [2022-11-21 16:16:12,922 INFO L131 PetriNetUnfolder]: For 37006/37905 co-relation queries the response was YES. [2022-11-21 16:16:12,954 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20067 conditions, 7038 events. 1432/7038 cut-off events. For 37006/37905 co-relation queries the response was YES. Maximal size of possible extension queue 176. Compared 71874 event pairs, 172 based on Foata normal form. 220/6376 useless extension candidates. Maximal degree in co-relation 19139. Up to 915 conditions per place. [2022-11-21 16:16:12,984 INFO L137 encePairwiseOnDemand]: 154/169 looper letters, 93 selfloop transitions, 35 changer transitions 28/275 dead transitions. [2022-11-21 16:16:12,984 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 275 transitions, 1989 flow [2022-11-21 16:16:12,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-21 16:16:12,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2022-11-21 16:16:12,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 2432 transitions. [2022-11-21 16:16:12,989 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.757396449704142 [2022-11-21 16:16:12,989 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 2432 transitions. [2022-11-21 16:16:12,990 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 2432 transitions. [2022-11-21 16:16:12,991 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 16:16:12,991 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 2432 transitions. [2022-11-21 16:16:12,995 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 128.0) internal successors, (2432), 19 states have internal predecessors, (2432), 0 states have call successors, (0), 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 16:16:13,001 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 169.0) internal successors, (3380), 20 states have internal predecessors, (3380), 0 states have call successors, (0), 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 16:16:13,002 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 169.0) internal successors, (3380), 20 states have internal predecessors, (3380), 0 states have call successors, (0), 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 16:16:13,002 INFO L175 Difference]: Start difference. First operand has 262 places, 259 transitions, 1633 flow. Second operand 19 states and 2432 transitions. [2022-11-21 16:16:13,002 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 275 transitions, 1989 flow [2022-11-21 16:16:13,108 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 275 transitions, 1906 flow, removed 11 selfloop flow, removed 21 redundant places. [2022-11-21 16:16:13,112 INFO L231 Difference]: Finished difference. Result has 258 places, 211 transitions, 1240 flow [2022-11-21 16:16:13,112 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=169, PETRI_DIFFERENCE_MINUEND_FLOW=1201, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=224, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=1240, PETRI_PLACES=258, PETRI_TRANSITIONS=211} [2022-11-21 16:16:13,113 INFO L288 CegarLoopForPetriNet]: 142 programPoint places, 116 predicate places. [2022-11-21 16:16:13,114 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 211 transitions, 1240 flow [2022-11-21 16:16:13,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 127.22727272727273) internal successors, (2799), 22 states have internal predecessors, (2799), 0 states have call successors, (0), 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 16:16:13,115 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:16:13,115 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] [2022-11-21 16:16:13,126 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9521d75d-5a05-4a74-a103-2fd821f09e3f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-21 16:16:13,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9521d75d-5a05-4a74-a103-2fd821f09e3f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-21 16:16:13,322 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2022-11-21 16:16:13,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:16:13,323 INFO L85 PathProgramCache]: Analyzing trace with hash -2049998370, now seen corresponding path program 1 times [2022-11-21 16:16:13,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:16:13,323 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778208876] [2022-11-21 16:16:13,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:16:13,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:16:13,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:16:15,826 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 16:16:15,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:16:15,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778208876] [2022-11-21 16:16:15,827 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1778208876] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:16:15,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1543425719] [2022-11-21 16:16:15,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:16:15,827 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:16:15,828 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9521d75d-5a05-4a74-a103-2fd821f09e3f/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:16:15,828 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9521d75d-5a05-4a74-a103-2fd821f09e3f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:16:15,831 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9521d75d-5a05-4a74-a103-2fd821f09e3f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-21 16:16:15,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:16:15,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-21 16:16:15,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:16:17,211 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 16:16:18,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 16:16:18,798 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 16:16:19,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 16:16:19,233 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 16:16:19,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 16:16:19,596 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 16:16:19,796 INFO L321 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-11-21 16:16:19,796 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 10 [2022-11-21 16:16:19,874 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 16:16:19,874 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:16:20,000 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_324 (Array Int Int))) (< (+ c_~d~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_324) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4)))) 2147483648)) is different from false [2022-11-21 16:16:25,336 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-21 16:16:25,337 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 34 treesize of output 35 [2022-11-21 16:16:25,354 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-21 16:16:25,355 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 1362 treesize of output 1302 [2022-11-21 16:16:25,380 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 1286 treesize of output 1094 [2022-11-21 16:16:25,397 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 1094 treesize of output 998 [2022-11-21 16:16:25,412 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 998 treesize of output 950 [2022-11-21 16:16:29,484 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 16:16:29,484 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1543425719] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:16:29,484 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:16:29,485 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 69 [2022-11-21 16:16:29,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536735907] [2022-11-21 16:16:29,485 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:16:29,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-11-21 16:16:29,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:16:29,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-11-21 16:16:29,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=373, Invalid=4316, Unknown=7, NotChecked=134, Total=4830 [2022-11-21 16:16:29,494 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 169 [2022-11-21 16:16:29,502 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 211 transitions, 1240 flow. Second operand has 70 states, 70 states have (on average 89.88571428571429) internal successors, (6292), 70 states have internal predecessors, (6292), 0 states have call successors, (0), 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 16:16:29,502 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:16:29,502 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 169 [2022-11-21 16:16:29,502 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 16:17:02,719 INFO L130 PetriNetUnfolder]: 6607/19263 cut-off events. [2022-11-21 16:17:02,719 INFO L131 PetriNetUnfolder]: For 143609/150313 co-relation queries the response was YES. [2022-11-21 16:17:02,801 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63495 conditions, 19263 events. 6607/19263 cut-off events. For 143609/150313 co-relation queries the response was YES. Maximal size of possible extension queue 478. Compared 203757 event pairs, 795 based on Foata normal form. 998/18274 useless extension candidates. Maximal degree in co-relation 61184. Up to 2708 conditions per place. [2022-11-21 16:17:02,864 INFO L137 encePairwiseOnDemand]: 135/169 looper letters, 209 selfloop transitions, 128 changer transitions 2/406 dead transitions. [2022-11-21 16:17:02,864 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 406 transitions, 3523 flow [2022-11-21 16:17:02,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-11-21 16:17:02,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2022-11-21 16:17:02,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 4401 transitions. [2022-11-21 16:17:02,875 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5540727684753871 [2022-11-21 16:17:02,875 INFO L72 ComplementDD]: Start complementDD. Operand 47 states and 4401 transitions. [2022-11-21 16:17:02,875 INFO L73 IsDeterministic]: Start isDeterministic. Operand 47 states and 4401 transitions. [2022-11-21 16:17:02,877 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 16:17:02,878 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 47 states and 4401 transitions. [2022-11-21 16:17:02,885 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 48 states, 47 states have (on average 93.63829787234043) internal successors, (4401), 47 states have internal predecessors, (4401), 0 states have call successors, (0), 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 16:17:02,896 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 48 states, 48 states have (on average 169.0) internal successors, (8112), 48 states have internal predecessors, (8112), 0 states have call successors, (0), 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 16:17:02,899 INFO L81 ComplementDD]: Finished complementDD. Result has 48 states, 48 states have (on average 169.0) internal successors, (8112), 48 states have internal predecessors, (8112), 0 states have call successors, (0), 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 16:17:02,899 INFO L175 Difference]: Start difference. First operand has 258 places, 211 transitions, 1240 flow. Second operand 47 states and 4401 transitions. [2022-11-21 16:17:02,899 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 406 transitions, 3523 flow [2022-11-21 16:17:03,363 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 406 transitions, 3230 flow, removed 94 selfloop flow, removed 20 redundant places. [2022-11-21 16:17:03,369 INFO L231 Difference]: Finished difference. Result has 287 places, 265 transitions, 2109 flow [2022-11-21 16:17:03,370 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=169, PETRI_DIFFERENCE_MINUEND_FLOW=1087, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=208, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=47, PETRI_FLOW=2109, PETRI_PLACES=287, PETRI_TRANSITIONS=265} [2022-11-21 16:17:03,370 INFO L288 CegarLoopForPetriNet]: 142 programPoint places, 145 predicate places. [2022-11-21 16:17:03,370 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 265 transitions, 2109 flow [2022-11-21 16:17:03,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 89.88571428571429) internal successors, (6292), 70 states have internal predecessors, (6292), 0 states have call successors, (0), 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 16:17:03,372 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:17:03,373 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] [2022-11-21 16:17:03,383 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9521d75d-5a05-4a74-a103-2fd821f09e3f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-21 16:17:03,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9521d75d-5a05-4a74-a103-2fd821f09e3f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:17:03,578 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2022-11-21 16:17:03,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:17:03,579 INFO L85 PathProgramCache]: Analyzing trace with hash -256178137, now seen corresponding path program 1 times [2022-11-21 16:17:03,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:17:03,579 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693441192] [2022-11-21 16:17:03,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:17:03,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:17:03,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:17:06,238 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 16:17:06,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:17:06,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693441192] [2022-11-21 16:17:06,239 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693441192] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:17:06,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [194927257] [2022-11-21 16:17:06,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:17:06,239 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:17:06,239 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9521d75d-5a05-4a74-a103-2fd821f09e3f/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:17:06,240 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9521d75d-5a05-4a74-a103-2fd821f09e3f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:17:06,244 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9521d75d-5a05-4a74-a103-2fd821f09e3f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-21 16:17:06,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:17:06,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-21 16:17:06,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:17:07,629 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 16:17:09,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 16:17:09,226 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 20 treesize of output 22 [2022-11-21 16:17:09,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 16:17:09,514 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 20 treesize of output 22 [2022-11-21 16:17:10,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 16:17:10,083 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 20 treesize of output 22 [2022-11-21 16:17:10,319 INFO L321 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-11-21 16:17:10,320 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 12 [2022-11-21 16:17:10,426 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 16:17:10,426 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:17:10,583 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_361 (Array Int Int))) (< 0 (+ 2147483649 c_~d~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_361) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4)))))) is different from false [2022-11-21 16:17:14,223 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-21 16:17:14,224 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 35 treesize of output 36 [2022-11-21 16:17:14,244 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-21 16:17:14,244 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 1426 treesize of output 1366 [2022-11-21 16:17:14,263 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 1350 treesize of output 1158 [2022-11-21 16:17:14,301 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 1158 treesize of output 1110 [2022-11-21 16:17:14,323 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 1110 treesize of output 1014 [2022-11-21 16:17:18,079 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 16:17:18,079 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [194927257] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:17:18,079 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:17:18,079 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 69 [2022-11-21 16:17:18,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509227122] [2022-11-21 16:17:18,080 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:17:18,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-11-21 16:17:18,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:17:18,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-11-21 16:17:18,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=365, Invalid=4320, Unknown=11, NotChecked=134, Total=4830 [2022-11-21 16:17:18,087 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 169 [2022-11-21 16:17:18,092 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 265 transitions, 2109 flow. Second operand has 70 states, 70 states have (on average 89.88571428571429) internal successors, (6292), 70 states have internal predecessors, (6292), 0 states have call successors, (0), 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 16:17:18,092 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:17:18,092 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 169 [2022-11-21 16:17:18,092 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 16:17:30,058 WARN L233 SmtUtils]: Spent 11.54s on a formula simplification. DAG size of input: 142 DAG size of output: 132 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-21 16:17:46,485 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.34s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-21 16:17:51,736 INFO L130 PetriNetUnfolder]: 6363/17365 cut-off events. [2022-11-21 16:17:51,736 INFO L131 PetriNetUnfolder]: For 182586/188827 co-relation queries the response was YES. [2022-11-21 16:17:51,838 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63835 conditions, 17365 events. 6363/17365 cut-off events. For 182586/188827 co-relation queries the response was YES. Maximal size of possible extension queue 455. Compared 176701 event pairs, 732 based on Foata normal form. 1166/16722 useless extension candidates. Maximal degree in co-relation 63194. Up to 2320 conditions per place. [2022-11-21 16:17:51,994 INFO L137 encePairwiseOnDemand]: 135/169 looper letters, 120 selfloop transitions, 56 changer transitions 104/347 dead transitions. [2022-11-21 16:17:51,994 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 347 transitions, 3389 flow [2022-11-21 16:17:51,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-11-21 16:17:51,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2022-11-21 16:17:51,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 3340 transitions. [2022-11-21 16:17:51,999 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5489809335963182 [2022-11-21 16:17:51,999 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 3340 transitions. [2022-11-21 16:17:52,000 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 3340 transitions. [2022-11-21 16:17:52,001 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 16:17:52,001 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 3340 transitions. [2022-11-21 16:17:52,006 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 92.77777777777777) internal successors, (3340), 36 states have internal predecessors, (3340), 0 states have call successors, (0), 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 16:17:52,013 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 169.0) internal successors, (6253), 37 states have internal predecessors, (6253), 0 states have call successors, (0), 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 16:17:52,014 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 169.0) internal successors, (6253), 37 states have internal predecessors, (6253), 0 states have call successors, (0), 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 16:17:52,014 INFO L175 Difference]: Start difference. First operand has 287 places, 265 transitions, 2109 flow. Second operand 36 states and 3340 transitions. [2022-11-21 16:17:52,015 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 347 transitions, 3389 flow [2022-11-21 16:17:52,964 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 347 transitions, 3088 flow, removed 83 selfloop flow, removed 30 redundant places. [2022-11-21 16:17:52,967 INFO L231 Difference]: Finished difference. Result has 294 places, 185 transitions, 1065 flow [2022-11-21 16:17:52,968 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=169, PETRI_DIFFERENCE_MINUEND_FLOW=1803, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=263, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=1065, PETRI_PLACES=294, PETRI_TRANSITIONS=185} [2022-11-21 16:17:52,968 INFO L288 CegarLoopForPetriNet]: 142 programPoint places, 152 predicate places. [2022-11-21 16:17:52,968 INFO L495 AbstractCegarLoop]: Abstraction has has 294 places, 185 transitions, 1065 flow [2022-11-21 16:17:52,969 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 89.88571428571429) internal successors, (6292), 70 states have internal predecessors, (6292), 0 states have call successors, (0), 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 16:17:52,970 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:17:52,970 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] [2022-11-21 16:17:52,975 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9521d75d-5a05-4a74-a103-2fd821f09e3f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-21 16:17:53,171 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9521d75d-5a05-4a74-a103-2fd821f09e3f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-21 16:17:53,171 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2022-11-21 16:17:53,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:17:53,171 INFO L85 PathProgramCache]: Analyzing trace with hash -1605065527, now seen corresponding path program 2 times [2022-11-21 16:17:53,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:17:53,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193712396] [2022-11-21 16:17:53,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:17:53,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:17:53,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:17:57,832 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:17:57,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:17:57,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193712396] [2022-11-21 16:17:57,833 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1193712396] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:17:57,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1859718871] [2022-11-21 16:17:57,833 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-21 16:17:57,833 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:17:57,834 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9521d75d-5a05-4a74-a103-2fd821f09e3f/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:17:57,836 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9521d75d-5a05-4a74-a103-2fd821f09e3f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:17:57,848 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9521d75d-5a05-4a74-a103-2fd821f09e3f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-21 16:17:57,994 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-21 16:17:57,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:17:57,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-21 16:17:57,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:17:59,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 16:17:59,109 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 16:17:59,232 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 16:17:59,310 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-21 16:17:59,310 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-21 16:17:59,310 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1859718871] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:17:59,310 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-21 16:17:59,310 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [27] total 38 [2022-11-21 16:17:59,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537169714] [2022-11-21 16:17:59,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:17:59,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-21 16:17:59,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:17:59,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-21 16:17:59,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=1318, Unknown=0, NotChecked=0, Total=1482 [2022-11-21 16:17:59,313 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 169 [2022-11-21 16:17:59,313 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 185 transitions, 1065 flow. Second operand has 13 states, 13 states have (on average 115.38461538461539) internal successors, (1500), 13 states have internal predecessors, (1500), 0 states have call successors, (0), 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 16:17:59,314 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:17:59,314 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 169 [2022-11-21 16:17:59,314 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 16:18:03,119 INFO L130 PetriNetUnfolder]: 5696/16169 cut-off events. [2022-11-21 16:18:03,120 INFO L131 PetriNetUnfolder]: For 152538/156293 co-relation queries the response was YES. [2022-11-21 16:18:03,194 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56790 conditions, 16169 events. 5696/16169 cut-off events. For 152538/156293 co-relation queries the response was YES. Maximal size of possible extension queue 427. Compared 167803 event pairs, 1330 based on Foata normal form. 1010/15224 useless extension candidates. Maximal degree in co-relation 56740. Up to 4357 conditions per place. [2022-11-21 16:18:03,245 INFO L137 encePairwiseOnDemand]: 154/169 looper letters, 89 selfloop transitions, 24 changer transitions 2/221 dead transitions. [2022-11-21 16:18:03,245 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 221 transitions, 1624 flow [2022-11-21 16:18:03,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-21 16:18:03,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-11-21 16:18:03,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1659 transitions. [2022-11-21 16:18:03,248 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7011834319526628 [2022-11-21 16:18:03,248 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1659 transitions. [2022-11-21 16:18:03,248 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1659 transitions. [2022-11-21 16:18:03,249 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 16:18:03,249 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1659 transitions. [2022-11-21 16:18:03,252 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 118.5) internal successors, (1659), 14 states have internal predecessors, (1659), 0 states have call successors, (0), 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 16:18:03,254 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 169.0) internal successors, (2535), 15 states have internal predecessors, (2535), 0 states have call successors, (0), 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 16:18:03,255 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 169.0) internal successors, (2535), 15 states have internal predecessors, (2535), 0 states have call successors, (0), 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 16:18:03,255 INFO L175 Difference]: Start difference. First operand has 294 places, 185 transitions, 1065 flow. Second operand 14 states and 1659 transitions. [2022-11-21 16:18:03,255 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 221 transitions, 1624 flow [2022-11-21 16:18:03,637 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 221 transitions, 1348 flow, removed 76 selfloop flow, removed 49 redundant places. [2022-11-21 16:18:03,640 INFO L231 Difference]: Finished difference. Result has 216 places, 185 transitions, 944 flow [2022-11-21 16:18:03,641 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=169, PETRI_DIFFERENCE_MINUEND_FLOW=885, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=944, PETRI_PLACES=216, PETRI_TRANSITIONS=185} [2022-11-21 16:18:03,641 INFO L288 CegarLoopForPetriNet]: 142 programPoint places, 74 predicate places. [2022-11-21 16:18:03,641 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 185 transitions, 944 flow [2022-11-21 16:18:03,642 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 115.38461538461539) internal successors, (1500), 13 states have internal predecessors, (1500), 0 states have call successors, (0), 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 16:18:03,642 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:18:03,642 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] [2022-11-21 16:18:03,652 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9521d75d-5a05-4a74-a103-2fd821f09e3f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-21 16:18:03,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9521d75d-5a05-4a74-a103-2fd821f09e3f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-21 16:18:03,848 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2022-11-21 16:18:03,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:18:03,848 INFO L85 PathProgramCache]: Analyzing trace with hash -1911657874, now seen corresponding path program 2 times [2022-11-21 16:18:03,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:18:03,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368967499] [2022-11-21 16:18:03,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:18:03,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:18:03,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:18:07,880 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:18:07,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:18:07,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368967499] [2022-11-21 16:18:07,880 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1368967499] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:18:07,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [129998847] [2022-11-21 16:18:07,881 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-21 16:18:07,881 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:18:07,881 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9521d75d-5a05-4a74-a103-2fd821f09e3f/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:18:07,882 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9521d75d-5a05-4a74-a103-2fd821f09e3f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:18:07,884 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9521d75d-5a05-4a74-a103-2fd821f09e3f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-21 16:18:07,995 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-21 16:18:07,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:18:07,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-21 16:18:08,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:18:08,035 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-21 16:18:08,318 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-21 16:18:08,318 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 11 treesize of output 11 [2022-11-21 16:18:09,019 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 16:18:09,091 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 16:18:09,144 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-21 16:18:09,144 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-21 16:18:09,144 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [129998847] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:18:09,144 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-21 16:18:09,144 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [28] total 39 [2022-11-21 16:18:09,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797028288] [2022-11-21 16:18:09,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:18:09,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-21 16:18:09,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:18:09,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-21 16:18:09,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=1390, Unknown=0, NotChecked=0, Total=1560 [2022-11-21 16:18:09,149 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 169 [2022-11-21 16:18:09,150 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 185 transitions, 944 flow. Second operand has 13 states, 13 states have (on average 111.61538461538461) internal successors, (1451), 13 states have internal predecessors, (1451), 0 states have call successors, (0), 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 16:18:09,150 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:18:09,150 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 169 [2022-11-21 16:18:09,150 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 16:18:13,949 INFO L130 PetriNetUnfolder]: 9466/26354 cut-off events. [2022-11-21 16:18:13,949 INFO L131 PetriNetUnfolder]: For 96762/104037 co-relation queries the response was YES. [2022-11-21 16:18:14,056 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78692 conditions, 26354 events. 9466/26354 cut-off events. For 96762/104037 co-relation queries the response was YES. Maximal size of possible extension queue 752. Compared 299329 event pairs, 2025 based on Foata normal form. 870/24169 useless extension candidates. Maximal degree in co-relation 78663. Up to 5332 conditions per place. [2022-11-21 16:18:14,134 INFO L137 encePairwiseOnDemand]: 154/169 looper letters, 107 selfloop transitions, 32 changer transitions 2/245 dead transitions. [2022-11-21 16:18:14,134 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 245 transitions, 1715 flow [2022-11-21 16:18:14,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-21 16:18:14,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-11-21 16:18:14,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1609 transitions. [2022-11-21 16:18:14,137 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.680050718512257 [2022-11-21 16:18:14,137 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1609 transitions. [2022-11-21 16:18:14,137 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1609 transitions. [2022-11-21 16:18:14,138 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 16:18:14,138 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1609 transitions. [2022-11-21 16:18:14,140 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 114.92857142857143) internal successors, (1609), 14 states have internal predecessors, (1609), 0 states have call successors, (0), 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 16:18:14,142 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 169.0) internal successors, (2535), 15 states have internal predecessors, (2535), 0 states have call successors, (0), 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 16:18:14,143 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 169.0) internal successors, (2535), 15 states have internal predecessors, (2535), 0 states have call successors, (0), 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 16:18:14,143 INFO L175 Difference]: Start difference. First operand has 216 places, 185 transitions, 944 flow. Second operand 14 states and 1609 transitions. [2022-11-21 16:18:14,143 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 245 transitions, 1715 flow [2022-11-21 16:18:14,405 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 245 transitions, 1676 flow, removed 2 selfloop flow, removed 11 redundant places. [2022-11-21 16:18:14,407 INFO L231 Difference]: Finished difference. Result has 221 places, 201 transitions, 1229 flow [2022-11-21 16:18:14,407 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=169, PETRI_DIFFERENCE_MINUEND_FLOW=907, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1229, PETRI_PLACES=221, PETRI_TRANSITIONS=201} [2022-11-21 16:18:14,408 INFO L288 CegarLoopForPetriNet]: 142 programPoint places, 79 predicate places. [2022-11-21 16:18:14,408 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 201 transitions, 1229 flow [2022-11-21 16:18:14,409 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 111.61538461538461) internal successors, (1451), 13 states have internal predecessors, (1451), 0 states have call successors, (0), 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 16:18:14,409 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:18:14,409 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] [2022-11-21 16:18:14,418 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9521d75d-5a05-4a74-a103-2fd821f09e3f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-21 16:18:14,614 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9521d75d-5a05-4a74-a103-2fd821f09e3f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-21 16:18:14,614 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2022-11-21 16:18:14,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:18:14,615 INFO L85 PathProgramCache]: Analyzing trace with hash 156036833, now seen corresponding path program 2 times [2022-11-21 16:18:14,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:18:14,615 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245685312] [2022-11-21 16:18:14,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:18:14,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:18:14,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:18:18,440 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:18:18,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:18:18,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245685312] [2022-11-21 16:18:18,441 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [245685312] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:18:18,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1189359745] [2022-11-21 16:18:18,441 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-21 16:18:18,441 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:18:18,441 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9521d75d-5a05-4a74-a103-2fd821f09e3f/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:18:18,442 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9521d75d-5a05-4a74-a103-2fd821f09e3f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:18:18,444 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9521d75d-5a05-4a74-a103-2fd821f09e3f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-21 16:18:18,585 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-21 16:18:18,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:18:18,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-21 16:18:18,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:18:18,618 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-21 16:18:18,871 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-21 16:18:18,871 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 11 treesize of output 11 [2022-11-21 16:18:19,596 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 16:18:19,663 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 16:18:19,714 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-21 16:18:19,714 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-21 16:18:19,714 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1189359745] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:18:19,715 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-21 16:18:19,715 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [26] total 37 [2022-11-21 16:18:19,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915958840] [2022-11-21 16:18:19,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:18:19,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-21 16:18:19,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:18:19,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-21 16:18:19,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=1248, Unknown=0, NotChecked=0, Total=1406 [2022-11-21 16:18:19,720 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 169 [2022-11-21 16:18:19,721 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 201 transitions, 1229 flow. Second operand has 13 states, 13 states have (on average 111.61538461538461) internal successors, (1451), 13 states have internal predecessors, (1451), 0 states have call successors, (0), 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 16:18:19,721 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:18:19,721 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 169 [2022-11-21 16:18:19,721 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 16:18:24,313 INFO L130 PetriNetUnfolder]: 9146/25834 cut-off events. [2022-11-21 16:18:24,313 INFO L131 PetriNetUnfolder]: For 106026/113086 co-relation queries the response was YES. [2022-11-21 16:18:24,426 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79252 conditions, 25834 events. 9146/25834 cut-off events. For 106026/113086 co-relation queries the response was YES. Maximal size of possible extension queue 733. Compared 294107 event pairs, 1980 based on Foata normal form. 910/23759 useless extension candidates. Maximal degree in co-relation 79220. Up to 8154 conditions per place. [2022-11-21 16:18:24,524 INFO L137 encePairwiseOnDemand]: 154/169 looper letters, 108 selfloop transitions, 25 changer transitions 2/239 dead transitions. [2022-11-21 16:18:24,524 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 239 transitions, 1750 flow [2022-11-21 16:18:24,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-21 16:18:24,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-11-21 16:18:24,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1607 transitions. [2022-11-21 16:18:24,526 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6792054099746407 [2022-11-21 16:18:24,526 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1607 transitions. [2022-11-21 16:18:24,526 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1607 transitions. [2022-11-21 16:18:24,527 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 16:18:24,527 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1607 transitions. [2022-11-21 16:18:24,530 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 114.78571428571429) internal successors, (1607), 14 states have internal predecessors, (1607), 0 states have call successors, (0), 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 16:18:24,533 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 169.0) internal successors, (2535), 15 states have internal predecessors, (2535), 0 states have call successors, (0), 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 16:18:24,534 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 169.0) internal successors, (2535), 15 states have internal predecessors, (2535), 0 states have call successors, (0), 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 16:18:24,534 INFO L175 Difference]: Start difference. First operand has 221 places, 201 transitions, 1229 flow. Second operand 14 states and 1607 transitions. [2022-11-21 16:18:24,534 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 239 transitions, 1750 flow [2022-11-21 16:18:24,823 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 239 transitions, 1725 flow, removed 0 selfloop flow, removed 10 redundant places. [2022-11-21 16:18:24,826 INFO L231 Difference]: Finished difference. Result has 225 places, 201 transitions, 1265 flow [2022-11-21 16:18:24,826 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=169, PETRI_DIFFERENCE_MINUEND_FLOW=1204, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1265, PETRI_PLACES=225, PETRI_TRANSITIONS=201} [2022-11-21 16:18:24,827 INFO L288 CegarLoopForPetriNet]: 142 programPoint places, 83 predicate places. [2022-11-21 16:18:24,827 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 201 transitions, 1265 flow [2022-11-21 16:18:24,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 111.61538461538461) internal successors, (1451), 13 states have internal predecessors, (1451), 0 states have call successors, (0), 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 16:18:24,827 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:18:24,827 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] [2022-11-21 16:18:24,833 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9521d75d-5a05-4a74-a103-2fd821f09e3f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-21 16:18:25,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9521d75d-5a05-4a74-a103-2fd821f09e3f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-21 16:18:25,028 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2022-11-21 16:18:25,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:18:25,028 INFO L85 PathProgramCache]: Analyzing trace with hash -87014724, now seen corresponding path program 3 times [2022-11-21 16:18:25,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:18:25,029 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183495994] [2022-11-21 16:18:25,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:18:25,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:18:25,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:18:28,547 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:18:28,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:18:28,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183495994] [2022-11-21 16:18:28,548 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [183495994] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:18:28,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1781916581] [2022-11-21 16:18:28,548 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-21 16:18:28,548 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:18:28,548 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9521d75d-5a05-4a74-a103-2fd821f09e3f/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:18:28,549 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9521d75d-5a05-4a74-a103-2fd821f09e3f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:18:28,553 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9521d75d-5a05-4a74-a103-2fd821f09e3f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-21 16:18:28,679 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-21 16:18:28,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:18:28,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-21 16:18:28,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:18:28,746 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-21 16:18:29,131 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-21 16:18:29,131 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 11 treesize of output 11 [2022-11-21 16:18:29,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 16:18:29,979 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-11-21 16:18:30,102 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 16:18:30,186 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 16:18:30,243 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-21 16:18:30,243 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-21 16:18:30,243 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1781916581] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:18:30,243 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-21 16:18:30,243 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [28] total 41 [2022-11-21 16:18:30,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85059771] [2022-11-21 16:18:30,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:18:30,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-21 16:18:30,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:18:30,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-21 16:18:30,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=1536, Unknown=0, NotChecked=0, Total=1722 [2022-11-21 16:18:30,247 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 169 [2022-11-21 16:18:30,248 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 201 transitions, 1265 flow. Second operand has 15 states, 15 states have (on average 109.33333333333333) internal successors, (1640), 15 states have internal predecessors, (1640), 0 states have call successors, (0), 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 16:18:30,248 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:18:30,248 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 169 [2022-11-21 16:18:30,249 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 16:18:35,477 INFO L130 PetriNetUnfolder]: 9946/27619 cut-off events. [2022-11-21 16:18:35,477 INFO L131 PetriNetUnfolder]: For 116966/122631 co-relation queries the response was YES. [2022-11-21 16:18:35,605 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86420 conditions, 27619 events. 9946/27619 cut-off events. For 116966/122631 co-relation queries the response was YES. Maximal size of possible extension queue 753. Compared 313331 event pairs, 1685 based on Foata normal form. 1300/25659 useless extension candidates. Maximal degree in co-relation 86387. Up to 4962 conditions per place. [2022-11-21 16:18:35,711 INFO L137 encePairwiseOnDemand]: 154/169 looper letters, 91 selfloop transitions, 46 changer transitions 2/242 dead transitions. [2022-11-21 16:18:35,712 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 242 transitions, 1845 flow [2022-11-21 16:18:35,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-21 16:18:35,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2022-11-21 16:18:35,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1686 transitions. [2022-11-21 16:18:35,720 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6650887573964497 [2022-11-21 16:18:35,720 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1686 transitions. [2022-11-21 16:18:35,720 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1686 transitions. [2022-11-21 16:18:35,721 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 16:18:35,721 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1686 transitions. [2022-11-21 16:18:35,724 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 112.4) internal successors, (1686), 15 states have internal predecessors, (1686), 0 states have call successors, (0), 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 16:18:35,728 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 169.0) internal successors, (2704), 16 states have internal predecessors, (2704), 0 states have call successors, (0), 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 16:18:35,728 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 169.0) internal successors, (2704), 16 states have internal predecessors, (2704), 0 states have call successors, (0), 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 16:18:35,728 INFO L175 Difference]: Start difference. First operand has 225 places, 201 transitions, 1265 flow. Second operand 15 states and 1686 transitions. [2022-11-21 16:18:35,729 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 242 transitions, 1845 flow [2022-11-21 16:18:36,189 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 242 transitions, 1788 flow, removed 8 selfloop flow, removed 14 redundant places. [2022-11-21 16:18:36,192 INFO L231 Difference]: Finished difference. Result has 226 places, 204 transitions, 1416 flow [2022-11-21 16:18:36,192 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=169, PETRI_DIFFERENCE_MINUEND_FLOW=1194, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=199, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1416, PETRI_PLACES=226, PETRI_TRANSITIONS=204} [2022-11-21 16:18:36,193 INFO L288 CegarLoopForPetriNet]: 142 programPoint places, 84 predicate places. [2022-11-21 16:18:36,193 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 204 transitions, 1416 flow [2022-11-21 16:18:36,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 109.33333333333333) internal successors, (1640), 15 states have internal predecessors, (1640), 0 states have call successors, (0), 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 16:18:36,193 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:18:36,194 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] [2022-11-21 16:18:36,199 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9521d75d-5a05-4a74-a103-2fd821f09e3f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-21 16:18:36,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9521d75d-5a05-4a74-a103-2fd821f09e3f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:18:36,395 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2022-11-21 16:18:36,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:18:36,395 INFO L85 PathProgramCache]: Analyzing trace with hash -87014725, now seen corresponding path program 3 times [2022-11-21 16:18:36,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:18:36,395 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44677057] [2022-11-21 16:18:36,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:18:36,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:18:36,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:18:39,897 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:18:39,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:18:39,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44677057] [2022-11-21 16:18:39,898 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [44677057] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:18:39,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [443542078] [2022-11-21 16:18:39,898 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-21 16:18:39,898 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:18:39,899 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9521d75d-5a05-4a74-a103-2fd821f09e3f/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:18:39,908 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9521d75d-5a05-4a74-a103-2fd821f09e3f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:18:39,917 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9521d75d-5a05-4a74-a103-2fd821f09e3f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-21 16:18:40,042 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-21 16:18:40,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:18:40,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-21 16:18:40,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:18:40,110 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-21 16:18:40,517 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-21 16:18:40,518 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 11 treesize of output 11 [2022-11-21 16:18:41,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 16:18:41,341 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-11-21 16:18:41,445 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 16:18:41,523 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 16:18:41,579 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-21 16:18:41,579 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-21 16:18:41,579 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [443542078] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:18:41,579 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-21 16:18:41,579 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [28] total 41 [2022-11-21 16:18:41,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518042800] [2022-11-21 16:18:41,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:18:41,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-21 16:18:41,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:18:41,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-21 16:18:41,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=1537, Unknown=0, NotChecked=0, Total=1722 [2022-11-21 16:18:41,583 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 169 [2022-11-21 16:18:41,584 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 204 transitions, 1416 flow. Second operand has 15 states, 15 states have (on average 109.33333333333333) internal successors, (1640), 15 states have internal predecessors, (1640), 0 states have call successors, (0), 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 16:18:41,584 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:18:41,584 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 169 [2022-11-21 16:18:41,584 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 16:18:46,892 INFO L130 PetriNetUnfolder]: 9656/27909 cut-off events. [2022-11-21 16:18:46,892 INFO L131 PetriNetUnfolder]: For 125978/131603 co-relation queries the response was YES. [2022-11-21 16:18:47,023 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85888 conditions, 27909 events. 9656/27909 cut-off events. For 125978/131603 co-relation queries the response was YES. Maximal size of possible extension queue 752. Compared 323085 event pairs, 1340 based on Foata normal form. 1250/25829 useless extension candidates. Maximal degree in co-relation 85855. Up to 9860 conditions per place. [2022-11-21 16:18:47,116 INFO L137 encePairwiseOnDemand]: 154/169 looper letters, 89 selfloop transitions, 33 changer transitions 2/227 dead transitions. [2022-11-21 16:18:47,116 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 227 transitions, 1796 flow [2022-11-21 16:18:47,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-21 16:18:47,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2022-11-21 16:18:47,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1674 transitions. [2022-11-21 16:18:47,119 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6603550295857988 [2022-11-21 16:18:47,119 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1674 transitions. [2022-11-21 16:18:47,119 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1674 transitions. [2022-11-21 16:18:47,120 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 16:18:47,120 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1674 transitions. [2022-11-21 16:18:47,123 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 111.6) internal successors, (1674), 15 states have internal predecessors, (1674), 0 states have call successors, (0), 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 16:18:47,125 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 169.0) internal successors, (2704), 16 states have internal predecessors, (2704), 0 states have call successors, (0), 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 16:18:47,126 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 169.0) internal successors, (2704), 16 states have internal predecessors, (2704), 0 states have call successors, (0), 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 16:18:47,126 INFO L175 Difference]: Start difference. First operand has 226 places, 204 transitions, 1416 flow. Second operand 15 states and 1674 transitions. [2022-11-21 16:18:47,126 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 227 transitions, 1796 flow [2022-11-21 16:18:47,554 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 227 transitions, 1704 flow, removed 8 selfloop flow, removed 15 redundant places. [2022-11-21 16:18:47,556 INFO L231 Difference]: Finished difference. Result has 225 places, 203 transitions, 1381 flow [2022-11-21 16:18:47,556 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=169, PETRI_DIFFERENCE_MINUEND_FLOW=1315, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=203, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1381, PETRI_PLACES=225, PETRI_TRANSITIONS=203} [2022-11-21 16:18:47,557 INFO L288 CegarLoopForPetriNet]: 142 programPoint places, 83 predicate places. [2022-11-21 16:18:47,557 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 203 transitions, 1381 flow [2022-11-21 16:18:47,557 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 109.33333333333333) internal successors, (1640), 15 states have internal predecessors, (1640), 0 states have call successors, (0), 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 16:18:47,557 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:18:47,558 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:18:47,563 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9521d75d-5a05-4a74-a103-2fd821f09e3f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-21 16:18:47,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9521d75d-5a05-4a74-a103-2fd821f09e3f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:18:47,758 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2022-11-21 16:18:47,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:18:47,759 INFO L85 PathProgramCache]: Analyzing trace with hash -507041828, now seen corresponding path program 1 times [2022-11-21 16:18:47,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:18:47,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920987578] [2022-11-21 16:18:47,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:18:47,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:18:47,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:18:50,486 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:18:50,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:18:50,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920987578] [2022-11-21 16:18:50,487 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1920987578] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:18:50,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [394404102] [2022-11-21 16:18:50,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:18:50,487 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:18:50,487 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9521d75d-5a05-4a74-a103-2fd821f09e3f/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:18:50,490 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9521d75d-5a05-4a74-a103-2fd821f09e3f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:18:50,491 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9521d75d-5a05-4a74-a103-2fd821f09e3f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-21 16:18:50,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:18:50,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 52 conjunts are in the unsatisfiable core [2022-11-21 16:18:50,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:18:51,600 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 16:18:52,118 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 16:18:53,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 16:18:53,452 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 20 treesize of output 22 [2022-11-21 16:18:53,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 16:18:53,680 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 20 treesize of output 22 [2022-11-21 16:18:55,028 INFO L321 Elim1Store]: treesize reduction 24, result has 11.1 percent of original size [2022-11-21 16:18:55,029 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 18 [2022-11-21 16:18:55,135 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:18:55,135 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:18:58,831 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-21 16:18:58,831 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 2 case distinctions, treesize of input 115 treesize of output 80 [2022-11-21 16:18:58,895 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-21 16:18:58,895 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 200 treesize of output 232 [2022-11-21 16:18:58,927 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-21 16:18:58,928 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 161 treesize of output 149 [2022-11-21 16:18:58,967 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-21 16:18:58,967 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 94 treesize of output 101 [2022-11-21 16:19:04,277 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:19:04,278 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [394404102] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:19:04,278 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:19:04,278 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 28] total 80 [2022-11-21 16:19:04,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701898526] [2022-11-21 16:19:04,278 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:19:04,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2022-11-21 16:19:04,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:19:04,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2022-11-21 16:19:04,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=517, Invalid=5941, Unknown=22, NotChecked=0, Total=6480 [2022-11-21 16:19:04,283 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 169 [2022-11-21 16:19:04,287 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 203 transitions, 1381 flow. Second operand has 81 states, 81 states have (on average 95.03703703703704) internal successors, (7698), 81 states have internal predecessors, (7698), 0 states have call successors, (0), 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 16:19:04,287 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:19:04,287 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 169 [2022-11-21 16:19:04,287 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 16:19:40,712 WARN L233 SmtUtils]: Spent 17.00s on a formula simplification. DAG size of input: 231 DAG size of output: 167 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-21 16:19:43,646 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-11-21 16:19:48,097 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-21 16:20:08,703 WARN L233 SmtUtils]: Spent 17.23s on a formula simplification. DAG size of input: 235 DAG size of output: 171 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-21 16:20:42,863 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-21 16:21:29,820 INFO L130 PetriNetUnfolder]: 14819/45445 cut-off events. [2022-11-21 16:21:29,820 INFO L131 PetriNetUnfolder]: For 209608/217222 co-relation queries the response was YES. [2022-11-21 16:21:30,277 INFO L83 FinitePrefix]: Finished finitePrefix Result has 131387 conditions, 45445 events. 14819/45445 cut-off events. For 209608/217222 co-relation queries the response was YES. Maximal size of possible extension queue 1341. Compared 582126 event pairs, 1489 based on Foata normal form. 3278/43943 useless extension candidates. Maximal degree in co-relation 131356. Up to 5646 conditions per place. [2022-11-21 16:21:30,415 INFO L137 encePairwiseOnDemand]: 136/169 looper letters, 627 selfloop transitions, 416 changer transitions 12/1125 dead transitions. [2022-11-21 16:21:30,415 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 364 places, 1125 transitions, 10368 flow [2022-11-21 16:21:30,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 140 states. [2022-11-21 16:21:30,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2022-11-21 16:21:30,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 13920 transitions. [2022-11-21 16:21:30,432 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.588334742180896 [2022-11-21 16:21:30,433 INFO L72 ComplementDD]: Start complementDD. Operand 140 states and 13920 transitions. [2022-11-21 16:21:30,433 INFO L73 IsDeterministic]: Start isDeterministic. Operand 140 states and 13920 transitions. [2022-11-21 16:21:30,438 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 16:21:30,438 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 140 states and 13920 transitions. [2022-11-21 16:21:30,457 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 141 states, 140 states have (on average 99.42857142857143) internal successors, (13920), 140 states have internal predecessors, (13920), 0 states have call successors, (0), 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 16:21:30,478 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 141 states, 141 states have (on average 169.0) internal successors, (23829), 141 states have internal predecessors, (23829), 0 states have call successors, (0), 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 16:21:30,483 INFO L81 ComplementDD]: Finished complementDD. Result has 141 states, 141 states have (on average 169.0) internal successors, (23829), 141 states have internal predecessors, (23829), 0 states have call successors, (0), 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 16:21:30,483 INFO L175 Difference]: Start difference. First operand has 225 places, 203 transitions, 1381 flow. Second operand 140 states and 13920 transitions. [2022-11-21 16:21:30,483 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 364 places, 1125 transitions, 10368 flow [2022-11-21 16:21:30,983 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 350 places, 1125 transitions, 10170 flow, removed 0 selfloop flow, removed 14 redundant places. [2022-11-21 16:21:30,993 INFO L231 Difference]: Finished difference. Result has 387 places, 604 transitions, 7815 flow [2022-11-21 16:21:30,993 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=169, PETRI_DIFFERENCE_MINUEND_FLOW=1315, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=203, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=140, PETRI_FLOW=7815, PETRI_PLACES=387, PETRI_TRANSITIONS=604} [2022-11-21 16:21:30,993 INFO L288 CegarLoopForPetriNet]: 142 programPoint places, 245 predicate places. [2022-11-21 16:21:30,993 INFO L495 AbstractCegarLoop]: Abstraction has has 387 places, 604 transitions, 7815 flow [2022-11-21 16:21:30,995 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 95.03703703703704) internal successors, (7698), 81 states have internal predecessors, (7698), 0 states have call successors, (0), 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 16:21:30,995 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:21:30,995 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:21:31,001 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9521d75d-5a05-4a74-a103-2fd821f09e3f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-11-21 16:21:31,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9521d75d-5a05-4a74-a103-2fd821f09e3f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-11-21 16:21:31,201 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2022-11-21 16:21:31,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:21:31,201 INFO L85 PathProgramCache]: Analyzing trace with hash -1278971497, now seen corresponding path program 1 times [2022-11-21 16:21:31,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:21:31,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982749015] [2022-11-21 16:21:31,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:21:31,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:21:31,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:21:33,922 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:21:33,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:21:33,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982749015] [2022-11-21 16:21:33,923 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982749015] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:21:33,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [547841484] [2022-11-21 16:21:33,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:21:33,923 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:21:33,923 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9521d75d-5a05-4a74-a103-2fd821f09e3f/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:21:33,926 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9521d75d-5a05-4a74-a103-2fd821f09e3f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:21:33,929 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9521d75d-5a05-4a74-a103-2fd821f09e3f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-21 16:21:34,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:21:34,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 55 conjunts are in the unsatisfiable core [2022-11-21 16:21:34,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:21:35,180 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 16:21:35,557 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 16:21:36,438 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 16:21:36,598 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 16:21:37,498 INFO L321 Elim1Store]: treesize reduction 24, result has 11.1 percent of original size [2022-11-21 16:21:37,499 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 16 [2022-11-21 16:21:37,579 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:21:37,579 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:21:42,252 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-21 16:21:42,253 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 2 case distinctions, treesize of input 152 treesize of output 97 [2022-11-21 16:21:42,333 INFO L321 Elim1Store]: treesize reduction 12, result has 81.5 percent of original size [2022-11-21 16:21:42,333 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 538 treesize of output 524 [2022-11-21 16:21:42,352 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-21 16:21:42,393 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-21 16:21:42,394 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 375 treesize of output 377 [2022-11-21 16:21:42,478 INFO L321 Elim1Store]: treesize reduction 12, result has 81.5 percent of original size [2022-11-21 16:21:42,478 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 422 treesize of output 374 [2022-11-21 16:21:46,341 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:21:46,341 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [547841484] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:21:46,342 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:21:46,342 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 25, 23] total 68 [2022-11-21 16:21:46,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264618975] [2022-11-21 16:21:46,342 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:21:46,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-11-21 16:21:46,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:21:46,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-11-21 16:21:46,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=522, Invalid=4142, Unknown=28, NotChecked=0, Total=4692 [2022-11-21 16:21:46,346 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 169 [2022-11-21 16:21:46,350 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 387 places, 604 transitions, 7815 flow. Second operand has 69 states, 69 states have (on average 97.21739130434783) internal successors, (6708), 69 states have internal predecessors, (6708), 0 states have call successors, (0), 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 16:21:46,350 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:21:46,350 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 169 [2022-11-21 16:21:46,350 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 16:22:09,289 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1]