./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/weaver/popl20-figure1-alt.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_2a81894e-faa0-4391-ae31-5501de5b18e3/bin/uautomizer-vX5HgA9Q3a/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a81894e-faa0-4391-ae31-5501de5b18e3/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_2a81894e-faa0-4391-ae31-5501de5b18e3/bin/uautomizer-vX5HgA9Q3a/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a81894e-faa0-4391-ae31-5501de5b18e3/bin/uautomizer-vX5HgA9Q3a/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-figure1-alt.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a81894e-faa0-4391-ae31-5501de5b18e3/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_2a81894e-faa0-4391-ae31-5501de5b18e3/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 fd523f7f98069bc15a8892c75be26f15a858863c31fc6ea863dcd5f92e46c458 --- 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 13:45:06,849 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-21 13:45:06,851 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-21 13:45:06,869 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-21 13:45:06,870 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-21 13:45:06,871 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-21 13:45:06,872 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-21 13:45:06,874 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-21 13:45:06,875 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-21 13:45:06,876 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-21 13:45:06,877 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-21 13:45:06,879 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-21 13:45:06,879 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-21 13:45:06,880 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-21 13:45:06,881 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-21 13:45:06,883 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-21 13:45:06,883 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-21 13:45:06,884 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-21 13:45:06,886 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-21 13:45:06,888 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-21 13:45:06,889 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-21 13:45:06,892 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-21 13:45:06,893 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-21 13:45:06,894 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-21 13:45:06,897 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-21 13:45:06,898 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-21 13:45:06,898 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-21 13:45:06,899 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-21 13:45:06,900 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-21 13:45:06,901 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-21 13:45:06,901 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-21 13:45:06,902 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-21 13:45:06,903 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-21 13:45:06,904 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-21 13:45:06,905 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-21 13:45:06,905 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-21 13:45:06,906 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-21 13:45:06,906 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-21 13:45:06,918 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-21 13:45:06,921 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-21 13:45:06,922 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-21 13:45:06,923 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a81894e-faa0-4391-ae31-5501de5b18e3/bin/uautomizer-vX5HgA9Q3a/config/svcomp-Overflow-32bit-Automizer_Default.epf [2022-11-21 13:45:06,964 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-21 13:45:06,964 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-21 13:45:06,965 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-21 13:45:06,965 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-21 13:45:06,966 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-21 13:45:06,966 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-21 13:45:06,967 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-21 13:45:06,967 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-21 13:45:06,967 INFO L138 SettingsManager]: * Use SBE=true [2022-11-21 13:45:06,967 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-21 13:45:06,968 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-21 13:45:06,969 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-21 13:45:06,969 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-21 13:45:06,969 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-21 13:45:06,969 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-21 13:45:06,969 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-21 13:45:06,969 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-21 13:45:06,970 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-21 13:45:06,970 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2022-11-21 13:45:06,970 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-21 13:45:06,970 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-21 13:45:06,970 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-21 13:45:06,970 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-21 13:45:06,971 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-21 13:45:06,971 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-21 13:45:06,971 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-21 13:45:06,971 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-21 13:45:06,971 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-21 13:45:06,972 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-21 13:45:06,972 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-21 13:45:06,972 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-21 13:45:06,972 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-21 13:45:06,972 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-21 13:45:06,973 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-21 13:45:06,973 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-21 13:45:06,973 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_2a81894e-faa0-4391-ae31-5501de5b18e3/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a81894e-faa0-4391-ae31-5501de5b18e3/bin/uautomizer-vX5HgA9Q3a Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fd523f7f98069bc15a8892c75be26f15a858863c31fc6ea863dcd5f92e46c458 [2022-11-21 13:45:07,299 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-21 13:45:07,326 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-21 13:45:07,328 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-21 13:45:07,329 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-21 13:45:07,330 INFO L275 PluginConnector]: CDTParser initialized [2022-11-21 13:45:07,331 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a81894e-faa0-4391-ae31-5501de5b18e3/bin/uautomizer-vX5HgA9Q3a/../../sv-benchmarks/c/weaver/popl20-figure1-alt.wvr.c [2022-11-21 13:45:10,446 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-21 13:45:10,639 INFO L351 CDTParser]: Found 1 translation units. [2022-11-21 13:45:10,640 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a81894e-faa0-4391-ae31-5501de5b18e3/sv-benchmarks/c/weaver/popl20-figure1-alt.wvr.c [2022-11-21 13:45:10,648 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a81894e-faa0-4391-ae31-5501de5b18e3/bin/uautomizer-vX5HgA9Q3a/data/cb26e43c6/98c1d73b1dcf478d8aaf7b5f1da20d01/FLAG163766664 [2022-11-21 13:45:10,668 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a81894e-faa0-4391-ae31-5501de5b18e3/bin/uautomizer-vX5HgA9Q3a/data/cb26e43c6/98c1d73b1dcf478d8aaf7b5f1da20d01 [2022-11-21 13:45:10,673 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-21 13:45:10,675 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-21 13:45:10,678 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-21 13:45:10,678 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-21 13:45:10,682 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-21 13:45:10,683 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:45:10" (1/1) ... [2022-11-21 13:45:10,684 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@633f0c1b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:45:10, skipping insertion in model container [2022-11-21 13:45:10,684 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:45:10" (1/1) ... [2022-11-21 13:45:10,693 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-21 13:45:10,717 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-21 13:45:10,955 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_2a81894e-faa0-4391-ae31-5501de5b18e3/sv-benchmarks/c/weaver/popl20-figure1-alt.wvr.c[2087,2100] [2022-11-21 13:45:10,956 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-21 13:45:10,967 INFO L203 MainTranslator]: Completed pre-run [2022-11-21 13:45:10,999 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_2a81894e-faa0-4391-ae31-5501de5b18e3/sv-benchmarks/c/weaver/popl20-figure1-alt.wvr.c[2087,2100] [2022-11-21 13:45:11,000 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-21 13:45:11,012 INFO L208 MainTranslator]: Completed translation [2022-11-21 13:45:11,012 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:45:11 WrapperNode [2022-11-21 13:45:11,012 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-21 13:45:11,013 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-21 13:45:11,013 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-21 13:45:11,014 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-21 13:45:11,019 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:45:11" (1/1) ... [2022-11-21 13:45:11,026 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:45:11" (1/1) ... [2022-11-21 13:45:11,059 INFO L138 Inliner]: procedures = 21, calls = 25, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 82 [2022-11-21 13:45:11,059 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-21 13:45:11,060 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-21 13:45:11,060 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-21 13:45:11,060 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-21 13:45:11,070 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:45:11" (1/1) ... [2022-11-21 13:45:11,070 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:45:11" (1/1) ... [2022-11-21 13:45:11,072 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:45:11" (1/1) ... [2022-11-21 13:45:11,073 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:45:11" (1/1) ... [2022-11-21 13:45:11,083 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:45:11" (1/1) ... [2022-11-21 13:45:11,098 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:45:11" (1/1) ... [2022-11-21 13:45:11,100 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:45:11" (1/1) ... [2022-11-21 13:45:11,101 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:45:11" (1/1) ... [2022-11-21 13:45:11,103 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-21 13:45:11,104 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-21 13:45:11,104 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-21 13:45:11,105 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-21 13:45:11,106 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:45:11" (1/1) ... [2022-11-21 13:45:11,112 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-21 13:45:11,126 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a81894e-faa0-4391-ae31-5501de5b18e3/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 13:45:11,140 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a81894e-faa0-4391-ae31-5501de5b18e3/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-21 13:45:11,163 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a81894e-faa0-4391-ae31-5501de5b18e3/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-21 13:45:11,191 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-21 13:45:11,192 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-21 13:45:11,192 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-21 13:45:11,192 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-21 13:45:11,192 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-21 13:45:11,192 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-21 13:45:11,192 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-21 13:45:11,192 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-21 13:45:11,192 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-21 13:45:11,193 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-21 13:45:11,193 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-21 13:45:11,193 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-21 13:45:11,193 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-21 13:45:11,193 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-21 13:45:11,194 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 13:45:11,280 INFO L235 CfgBuilder]: Building ICFG [2022-11-21 13:45:11,282 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-21 13:45:11,513 INFO L276 CfgBuilder]: Performing block encoding [2022-11-21 13:45:11,585 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-21 13:45:11,585 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-21 13:45:11,588 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:45:11 BoogieIcfgContainer [2022-11-21 13:45:11,588 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-21 13:45:11,591 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-21 13:45:11,591 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-21 13:45:11,594 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-21 13:45:11,595 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 01:45:10" (1/3) ... [2022-11-21 13:45:11,595 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@773c1b98 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:45:11, skipping insertion in model container [2022-11-21 13:45:11,596 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:45:11" (2/3) ... [2022-11-21 13:45:11,596 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@773c1b98 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:45:11, skipping insertion in model container [2022-11-21 13:45:11,596 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:45:11" (3/3) ... [2022-11-21 13:45:11,598 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-figure1-alt.wvr.c [2022-11-21 13:45:11,606 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-21 13:45:11,618 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-21 13:45:11,619 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2022-11-21 13:45:11,619 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-21 13:45:11,754 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-21 13:45:11,798 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 105 places, 104 transitions, 224 flow [2022-11-21 13:45:11,853 INFO L130 PetriNetUnfolder]: 6/102 cut-off events. [2022-11-21 13:45:11,853 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-21 13:45:11,859 INFO L83 FinitePrefix]: Finished finitePrefix Result has 111 conditions, 102 events. 6/102 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 89 event pairs, 0 based on Foata normal form. 0/86 useless extension candidates. Maximal degree in co-relation 58. Up to 2 conditions per place. [2022-11-21 13:45:11,859 INFO L82 GeneralOperation]: Start removeDead. Operand has 105 places, 104 transitions, 224 flow [2022-11-21 13:45:11,865 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 86 places, 84 transitions, 180 flow [2022-11-21 13:45:11,876 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-21 13:45:11,883 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;@34c40066, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-21 13:45:11,883 INFO L358 AbstractCegarLoop]: Starting to check reachability of 20 error locations. [2022-11-21 13:45:11,898 INFO L130 PetriNetUnfolder]: 2/43 cut-off events. [2022-11-21 13:45:11,898 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-21 13:45:11,898 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 13:45:11,899 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] [2022-11-21 13:45:11,900 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-21 13:45:11,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:45:11,906 INFO L85 PathProgramCache]: Analyzing trace with hash 2094336087, now seen corresponding path program 1 times [2022-11-21 13:45:11,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:45:11,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334473334] [2022-11-21 13:45:11,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:45:11,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:45:12,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:45:12,322 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 13:45:12,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:45:12,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334473334] [2022-11-21 13:45:12,324 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [334473334] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 13:45:12,325 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 13:45:12,325 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-21 13:45:12,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048160167] [2022-11-21 13:45:12,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 13:45:12,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 13:45:12,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:45:12,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 13:45:12,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 13:45:12,371 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 104 [2022-11-21 13:45:12,374 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 84 transitions, 180 flow. Second operand has 3 states, 3 states have (on average 88.0) internal successors, (264), 3 states have internal predecessors, (264), 0 states have call successors, (0), 0 states 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 13:45:12,375 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 13:45:12,375 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 104 [2022-11-21 13:45:12,376 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 13:45:12,487 INFO L130 PetriNetUnfolder]: 22/171 cut-off events. [2022-11-21 13:45:12,493 INFO L131 PetriNetUnfolder]: For 27/28 co-relation queries the response was YES. [2022-11-21 13:45:12,494 INFO L83 FinitePrefix]: Finished finitePrefix Result has 235 conditions, 171 events. 22/171 cut-off events. For 27/28 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 499 event pairs, 6 based on Foata normal form. 18/146 useless extension candidates. Maximal degree in co-relation 141. Up to 39 conditions per place. [2022-11-21 13:45:12,498 INFO L137 encePairwiseOnDemand]: 94/104 looper letters, 12 selfloop transitions, 2 changer transitions 1/84 dead transitions. [2022-11-21 13:45:12,499 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 84 transitions, 217 flow [2022-11-21 13:45:12,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 13:45:12,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-21 13:45:12,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 286 transitions. [2022-11-21 13:45:12,517 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9166666666666666 [2022-11-21 13:45:12,518 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 286 transitions. [2022-11-21 13:45:12,518 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 286 transitions. [2022-11-21 13:45:12,520 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 13:45:12,522 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 286 transitions. [2022-11-21 13:45:12,526 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 95.33333333333333) internal successors, (286), 3 states have internal predecessors, (286), 0 states have call successors, (0), 0 states 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 13:45:12,532 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 104.0) internal successors, (416), 4 states have internal predecessors, (416), 0 states have call successors, (0), 0 states 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 13:45:12,534 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 104.0) internal successors, (416), 4 states have internal predecessors, (416), 0 states have call successors, (0), 0 states 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 13:45:12,536 INFO L175 Difference]: Start difference. First operand has 86 places, 84 transitions, 180 flow. Second operand 3 states and 286 transitions. [2022-11-21 13:45:12,537 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 84 transitions, 217 flow [2022-11-21 13:45:12,541 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 84 transitions, 203 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-11-21 13:45:12,545 INFO L231 Difference]: Finished difference. Result has 84 places, 80 transitions, 180 flow [2022-11-21 13:45:12,547 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=180, PETRI_PLACES=84, PETRI_TRANSITIONS=80} [2022-11-21 13:45:12,554 INFO L288 CegarLoopForPetriNet]: 86 programPoint places, -2 predicate places. [2022-11-21 13:45:12,557 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 80 transitions, 180 flow [2022-11-21 13:45:12,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 88.0) internal successors, (264), 3 states have internal predecessors, (264), 0 states have call successors, (0), 0 states 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 13:45:12,558 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 13:45:12,558 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] [2022-11-21 13:45:12,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-21 13:45:12,559 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-21 13:45:12,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:45:12,560 INFO L85 PathProgramCache]: Analyzing trace with hash -1682671302, now seen corresponding path program 1 times [2022-11-21 13:45:12,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:45:12,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380861483] [2022-11-21 13:45:12,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:45:12,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:45:12,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:45:12,703 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 13:45:12,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:45:12,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380861483] [2022-11-21 13:45:12,704 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1380861483] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 13:45:12,705 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 13:45:12,705 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 13:45:12,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070846842] [2022-11-21 13:45:12,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 13:45:12,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-21 13:45:12,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:45:12,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-21 13:45:12,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-21 13:45:12,709 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 104 [2022-11-21 13:45:12,710 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 80 transitions, 180 flow. Second operand has 4 states, 4 states have (on average 80.5) internal successors, (322), 4 states have internal predecessors, (322), 0 states have call successors, (0), 0 states 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 13:45:12,710 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 13:45:12,710 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 104 [2022-11-21 13:45:12,710 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 13:45:12,908 INFO L130 PetriNetUnfolder]: 95/261 cut-off events. [2022-11-21 13:45:12,909 INFO L131 PetriNetUnfolder]: For 37/37 co-relation queries the response was YES. [2022-11-21 13:45:12,910 INFO L83 FinitePrefix]: Finished finitePrefix Result has 553 conditions, 261 events. 95/261 cut-off events. For 37/37 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1091 event pairs, 12 based on Foata normal form. 0/189 useless extension candidates. Maximal degree in co-relation 372. Up to 124 conditions per place. [2022-11-21 13:45:12,912 INFO L137 encePairwiseOnDemand]: 98/104 looper letters, 34 selfloop transitions, 4 changer transitions 0/98 dead transitions. [2022-11-21 13:45:12,912 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 98 transitions, 309 flow [2022-11-21 13:45:12,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-21 13:45:12,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-21 13:45:12,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 435 transitions. [2022-11-21 13:45:12,922 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8365384615384616 [2022-11-21 13:45:12,922 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 435 transitions. [2022-11-21 13:45:12,923 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 435 transitions. [2022-11-21 13:45:12,923 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 13:45:12,923 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 435 transitions. [2022-11-21 13:45:12,925 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 87.0) internal successors, (435), 5 states have internal predecessors, (435), 0 states have call successors, (0), 0 states 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 13:45:12,927 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 104.0) internal successors, (624), 6 states have internal predecessors, (624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:45:12,928 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 104.0) internal successors, (624), 6 states have internal predecessors, (624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:45:12,934 INFO L175 Difference]: Start difference. First operand has 84 places, 80 transitions, 180 flow. Second operand 5 states and 435 transitions. [2022-11-21 13:45:12,935 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 98 transitions, 309 flow [2022-11-21 13:45:12,936 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 98 transitions, 307 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-21 13:45:12,939 INFO L231 Difference]: Finished difference. Result has 89 places, 83 transitions, 208 flow [2022-11-21 13:45:12,939 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=208, PETRI_PLACES=89, PETRI_TRANSITIONS=83} [2022-11-21 13:45:12,940 INFO L288 CegarLoopForPetriNet]: 86 programPoint places, 3 predicate places. [2022-11-21 13:45:12,941 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 83 transitions, 208 flow [2022-11-21 13:45:12,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 80.5) internal successors, (322), 4 states have internal predecessors, (322), 0 states have call successors, (0), 0 states 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 13:45:12,942 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 13:45:12,943 INFO L209 CegarLoopForPetriNet]: trace histogram [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] [2022-11-21 13:45:12,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-21 13:45:12,943 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-21 13:45:12,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:45:12,951 INFO L85 PathProgramCache]: Analyzing trace with hash -2079090651, now seen corresponding path program 1 times [2022-11-21 13:45:12,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:45:12,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834073259] [2022-11-21 13:45:12,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:45:12,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:45:12,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:45:13,151 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:45:13,151 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:45:13,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834073259] [2022-11-21 13:45:13,152 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [834073259] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 13:45:13,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [259801204] [2022-11-21 13:45:13,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:45:13,153 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:45:13,153 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a81894e-faa0-4391-ae31-5501de5b18e3/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 13:45:13,171 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a81894e-faa0-4391-ae31-5501de5b18e3/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 13:45:13,199 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a81894e-faa0-4391-ae31-5501de5b18e3/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-21 13:45:13,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:45:13,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-21 13:45:13,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 13:45:13,378 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:45:13,379 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 13:45:13,463 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:45:13,464 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [259801204] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 13:45:13,464 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 13:45:13,464 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-11-21 13:45:13,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521955011] [2022-11-21 13:45:13,465 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 13:45:13,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-21 13:45:13,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:45:13,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-21 13:45:13,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-11-21 13:45:13,468 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 104 [2022-11-21 13:45:13,469 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 83 transitions, 208 flow. Second operand has 7 states, 7 states have (on average 88.57142857142857) internal successors, (620), 7 states have internal predecessors, (620), 0 states have call successors, (0), 0 states 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 13:45:13,470 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 13:45:13,470 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 104 [2022-11-21 13:45:13,470 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 13:45:13,597 INFO L130 PetriNetUnfolder]: 46/340 cut-off events. [2022-11-21 13:45:13,598 INFO L131 PetriNetUnfolder]: For 54/58 co-relation queries the response was YES. [2022-11-21 13:45:13,600 INFO L83 FinitePrefix]: Finished finitePrefix Result has 555 conditions, 340 events. 46/340 cut-off events. For 54/58 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 1544 event pairs, 3 based on Foata normal form. 5/286 useless extension candidates. Maximal degree in co-relation 467. Up to 59 conditions per place. [2022-11-21 13:45:13,602 INFO L137 encePairwiseOnDemand]: 98/104 looper letters, 22 selfloop transitions, 12 changer transitions 0/106 dead transitions. [2022-11-21 13:45:13,603 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 106 transitions, 355 flow [2022-11-21 13:45:13,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-21 13:45:13,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-21 13:45:13,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 654 transitions. [2022-11-21 13:45:13,605 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8983516483516484 [2022-11-21 13:45:13,606 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 654 transitions. [2022-11-21 13:45:13,606 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 654 transitions. [2022-11-21 13:45:13,606 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 13:45:13,607 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 654 transitions. [2022-11-21 13:45:13,608 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 93.42857142857143) internal successors, (654), 7 states have internal predecessors, (654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:45:13,611 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 104.0) internal successors, (832), 8 states have internal predecessors, (832), 0 states have call successors, (0), 0 states 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 13:45:13,611 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 104.0) internal successors, (832), 8 states have internal predecessors, (832), 0 states have call successors, (0), 0 states 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 13:45:13,612 INFO L175 Difference]: Start difference. First operand has 89 places, 83 transitions, 208 flow. Second operand 7 states and 654 transitions. [2022-11-21 13:45:13,612 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 106 transitions, 355 flow [2022-11-21 13:45:13,614 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 106 transitions, 353 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-21 13:45:13,616 INFO L231 Difference]: Finished difference. Result has 99 places, 92 transitions, 315 flow [2022-11-21 13:45:13,616 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=206, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=315, PETRI_PLACES=99, PETRI_TRANSITIONS=92} [2022-11-21 13:45:13,621 INFO L288 CegarLoopForPetriNet]: 86 programPoint places, 13 predicate places. [2022-11-21 13:45:13,621 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 92 transitions, 315 flow [2022-11-21 13:45:13,622 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 88.57142857142857) internal successors, (620), 7 states have internal predecessors, (620), 0 states have call successors, (0), 0 states 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 13:45:13,622 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 13:45:13,622 INFO L209 CegarLoopForPetriNet]: trace histogram [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] [2022-11-21 13:45:13,632 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a81894e-faa0-4391-ae31-5501de5b18e3/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-21 13:45:13,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a81894e-faa0-4391-ae31-5501de5b18e3/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:45:13,828 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-21 13:45:13,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:45:13,829 INFO L85 PathProgramCache]: Analyzing trace with hash -2079090650, now seen corresponding path program 1 times [2022-11-21 13:45:13,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:45:13,831 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487619938] [2022-11-21 13:45:13,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:45:13,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:45:13,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:45:13,920 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:45:13,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:45:13,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487619938] [2022-11-21 13:45:13,921 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487619938] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 13:45:13,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1816002161] [2022-11-21 13:45:13,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:45:13,922 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:45:13,922 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a81894e-faa0-4391-ae31-5501de5b18e3/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 13:45:13,923 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a81894e-faa0-4391-ae31-5501de5b18e3/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 13:45:13,953 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a81894e-faa0-4391-ae31-5501de5b18e3/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-21 13:45:14,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:45:14,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-21 13:45:14,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 13:45:14,110 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:45:14,111 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-21 13:45:14,115 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1816002161] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 13:45:14,116 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-21 13:45:14,116 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2022-11-21 13:45:14,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448001776] [2022-11-21 13:45:14,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 13:45:14,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-21 13:45:14,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:45:14,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-21 13:45:14,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-21 13:45:14,122 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 104 [2022-11-21 13:45:14,127 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 92 transitions, 315 flow. Second operand has 4 states, 4 states have (on average 88.0) internal successors, (352), 4 states have internal predecessors, (352), 0 states have call successors, (0), 0 states 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 13:45:14,127 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 13:45:14,127 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 104 [2022-11-21 13:45:14,127 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 13:45:14,265 INFO L130 PetriNetUnfolder]: 44/378 cut-off events. [2022-11-21 13:45:14,265 INFO L131 PetriNetUnfolder]: For 601/663 co-relation queries the response was YES. [2022-11-21 13:45:14,269 INFO L83 FinitePrefix]: Finished finitePrefix Result has 780 conditions, 378 events. 44/378 cut-off events. For 601/663 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 1747 event pairs, 2 based on Foata normal form. 20/358 useless extension candidates. Maximal degree in co-relation 439. Up to 57 conditions per place. [2022-11-21 13:45:14,271 INFO L137 encePairwiseOnDemand]: 98/104 looper letters, 14 selfloop transitions, 10 changer transitions 0/96 dead transitions. [2022-11-21 13:45:14,271 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 96 transitions, 393 flow [2022-11-21 13:45:14,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-21 13:45:14,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-21 13:45:14,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 366 transitions. [2022-11-21 13:45:14,273 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8798076923076923 [2022-11-21 13:45:14,274 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 366 transitions. [2022-11-21 13:45:14,274 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 366 transitions. [2022-11-21 13:45:14,274 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 13:45:14,274 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 366 transitions. [2022-11-21 13:45:14,276 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 91.5) internal successors, (366), 4 states have internal predecessors, (366), 0 states have call successors, (0), 0 states 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 13:45:14,277 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 104.0) internal successors, (520), 5 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:45:14,278 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 104.0) internal successors, (520), 5 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:45:14,278 INFO L175 Difference]: Start difference. First operand has 99 places, 92 transitions, 315 flow. Second operand 4 states and 366 transitions. [2022-11-21 13:45:14,278 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 96 transitions, 393 flow [2022-11-21 13:45:14,286 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 96 transitions, 377 flow, removed 8 selfloop flow, removed 1 redundant places. [2022-11-21 13:45:14,289 INFO L231 Difference]: Finished difference. Result has 101 places, 93 transitions, 369 flow [2022-11-21 13:45:14,289 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=272, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=369, PETRI_PLACES=101, PETRI_TRANSITIONS=93} [2022-11-21 13:45:14,292 INFO L288 CegarLoopForPetriNet]: 86 programPoint places, 15 predicate places. [2022-11-21 13:45:14,292 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 93 transitions, 369 flow [2022-11-21 13:45:14,293 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 88.0) internal successors, (352), 4 states have internal predecessors, (352), 0 states have call successors, (0), 0 states 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 13:45:14,293 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 13:45:14,293 INFO L209 CegarLoopForPetriNet]: trace histogram [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] [2022-11-21 13:45:14,308 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a81894e-faa0-4391-ae31-5501de5b18e3/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-21 13:45:14,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a81894e-faa0-4391-ae31-5501de5b18e3/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-11-21 13:45:14,500 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-21 13:45:14,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:45:14,502 INFO L85 PathProgramCache]: Analyzing trace with hash -846312056, now seen corresponding path program 1 times [2022-11-21 13:45:14,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:45:14,502 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728771983] [2022-11-21 13:45:14,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:45:14,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:45:14,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:45:14,675 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:45:14,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:45:14,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728771983] [2022-11-21 13:45:14,676 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728771983] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 13:45:14,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [266512096] [2022-11-21 13:45:14,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:45:14,677 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:45:14,677 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a81894e-faa0-4391-ae31-5501de5b18e3/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 13:45:14,678 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a81894e-faa0-4391-ae31-5501de5b18e3/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 13:45:14,703 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a81894e-faa0-4391-ae31-5501de5b18e3/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-21 13:45:14,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:45:14,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-21 13:45:14,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 13:45:14,806 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:45:14,806 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 13:45:14,862 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:45:14,862 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [266512096] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 13:45:14,863 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 13:45:14,863 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2022-11-21 13:45:14,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930704069] [2022-11-21 13:45:14,863 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 13:45:14,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-21 13:45:14,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:45:14,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-21 13:45:14,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-11-21 13:45:14,868 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 104 [2022-11-21 13:45:14,870 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 93 transitions, 369 flow. Second operand has 12 states, 12 states have (on average 81.66666666666667) internal successors, (980), 12 states have internal predecessors, (980), 0 states have call successors, (0), 0 states 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 13:45:14,870 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 13:45:14,870 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 104 [2022-11-21 13:45:14,871 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 13:45:15,411 INFO L130 PetriNetUnfolder]: 304/1142 cut-off events. [2022-11-21 13:45:15,411 INFO L131 PetriNetUnfolder]: For 4352/4391 co-relation queries the response was YES. [2022-11-21 13:45:15,415 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3449 conditions, 1142 events. 304/1142 cut-off events. For 4352/4391 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 7230 event pairs, 13 based on Foata normal form. 36/1040 useless extension candidates. Maximal degree in co-relation 2715. Up to 230 conditions per place. [2022-11-21 13:45:15,423 INFO L137 encePairwiseOnDemand]: 97/104 looper letters, 138 selfloop transitions, 18 changer transitions 0/216 dead transitions. [2022-11-21 13:45:15,423 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 216 transitions, 1670 flow [2022-11-21 13:45:15,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-21 13:45:15,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-11-21 13:45:15,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1522 transitions. [2022-11-21 13:45:15,427 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.813034188034188 [2022-11-21 13:45:15,427 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1522 transitions. [2022-11-21 13:45:15,428 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1522 transitions. [2022-11-21 13:45:15,429 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 13:45:15,429 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1522 transitions. [2022-11-21 13:45:15,432 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 84.55555555555556) internal successors, (1522), 18 states have internal predecessors, (1522), 0 states have call successors, (0), 0 states 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 13:45:15,436 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 104.0) internal successors, (1976), 19 states have internal predecessors, (1976), 0 states have call successors, (0), 0 states 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 13:45:15,437 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 104.0) internal successors, (1976), 19 states have internal predecessors, (1976), 0 states have call successors, (0), 0 states 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 13:45:15,437 INFO L175 Difference]: Start difference. First operand has 101 places, 93 transitions, 369 flow. Second operand 18 states and 1522 transitions. [2022-11-21 13:45:15,437 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 216 transitions, 1670 flow [2022-11-21 13:45:15,444 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 216 transitions, 1493 flow, removed 88 selfloop flow, removed 1 redundant places. [2022-11-21 13:45:15,447 INFO L231 Difference]: Finished difference. Result has 121 places, 105 transitions, 446 flow [2022-11-21 13:45:15,447 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=340, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=446, PETRI_PLACES=121, PETRI_TRANSITIONS=105} [2022-11-21 13:45:15,448 INFO L288 CegarLoopForPetriNet]: 86 programPoint places, 35 predicate places. [2022-11-21 13:45:15,448 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 105 transitions, 446 flow [2022-11-21 13:45:15,448 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 81.66666666666667) internal successors, (980), 12 states have internal predecessors, (980), 0 states have call successors, (0), 0 states 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 13:45:15,449 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 13:45:15,449 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:45:15,459 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a81894e-faa0-4391-ae31-5501de5b18e3/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-11-21 13:45:15,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a81894e-faa0-4391-ae31-5501de5b18e3/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:45:15,654 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-21 13:45:15,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:45:15,655 INFO L85 PathProgramCache]: Analyzing trace with hash -465869645, now seen corresponding path program 1 times [2022-11-21 13:45:15,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:45:15,655 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777193578] [2022-11-21 13:45:15,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:45:15,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:45:15,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:45:15,783 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:45:15,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:45:15,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777193578] [2022-11-21 13:45:15,784 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [777193578] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 13:45:15,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1052899088] [2022-11-21 13:45:15,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:45:15,785 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:45:15,785 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a81894e-faa0-4391-ae31-5501de5b18e3/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 13:45:15,786 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a81894e-faa0-4391-ae31-5501de5b18e3/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 13:45:15,811 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a81894e-faa0-4391-ae31-5501de5b18e3/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-21 13:45:15,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:45:15,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-21 13:45:15,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 13:45:15,916 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:45:15,916 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-21 13:45:15,916 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1052899088] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 13:45:15,916 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-21 13:45:15,916 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2022-11-21 13:45:15,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142786393] [2022-11-21 13:45:15,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 13:45:15,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-21 13:45:15,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:45:15,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-21 13:45:15,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-21 13:45:15,922 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 104 [2022-11-21 13:45:15,923 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 105 transitions, 446 flow. Second operand has 6 states, 6 states have (on average 81.33333333333333) internal successors, (488), 6 states have internal predecessors, (488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:45:15,923 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 13:45:15,923 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 104 [2022-11-21 13:45:15,923 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 13:45:16,200 INFO L130 PetriNetUnfolder]: 272/1051 cut-off events. [2022-11-21 13:45:16,201 INFO L131 PetriNetUnfolder]: For 2561/2634 co-relation queries the response was YES. [2022-11-21 13:45:16,206 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2983 conditions, 1051 events. 272/1051 cut-off events. For 2561/2634 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 6864 event pairs, 37 based on Foata normal form. 52/946 useless extension candidates. Maximal degree in co-relation 2281. Up to 273 conditions per place. [2022-11-21 13:45:16,212 INFO L137 encePairwiseOnDemand]: 99/104 looper letters, 50 selfloop transitions, 11 changer transitions 0/121 dead transitions. [2022-11-21 13:45:16,212 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 121 transitions, 662 flow [2022-11-21 13:45:16,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-21 13:45:16,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-21 13:45:16,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 591 transitions. [2022-11-21 13:45:16,254 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8118131868131868 [2022-11-21 13:45:16,254 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 591 transitions. [2022-11-21 13:45:16,255 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 591 transitions. [2022-11-21 13:45:16,255 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 13:45:16,255 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 591 transitions. [2022-11-21 13:45:16,257 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 84.42857142857143) internal successors, (591), 7 states have internal predecessors, (591), 0 states have call successors, (0), 0 states 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 13:45:16,258 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 104.0) internal successors, (832), 8 states have internal predecessors, (832), 0 states have call successors, (0), 0 states 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 13:45:16,258 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 104.0) internal successors, (832), 8 states have internal predecessors, (832), 0 states have call successors, (0), 0 states 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 13:45:16,258 INFO L175 Difference]: Start difference. First operand has 121 places, 105 transitions, 446 flow. Second operand 7 states and 591 transitions. [2022-11-21 13:45:16,259 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 121 transitions, 662 flow [2022-11-21 13:45:16,266 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 121 transitions, 630 flow, removed 11 selfloop flow, removed 5 redundant places. [2022-11-21 13:45:16,268 INFO L231 Difference]: Finished difference. Result has 117 places, 101 transitions, 409 flow [2022-11-21 13:45:16,269 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=387, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=409, PETRI_PLACES=117, PETRI_TRANSITIONS=101} [2022-11-21 13:45:16,272 INFO L288 CegarLoopForPetriNet]: 86 programPoint places, 31 predicate places. [2022-11-21 13:45:16,272 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 101 transitions, 409 flow [2022-11-21 13:45:16,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 81.33333333333333) internal successors, (488), 6 states have internal predecessors, (488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:45:16,272 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 13:45:16,273 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] [2022-11-21 13:45:16,278 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a81894e-faa0-4391-ae31-5501de5b18e3/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-21 13:45:16,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a81894e-faa0-4391-ae31-5501de5b18e3/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-21 13:45:16,478 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-21 13:45:16,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:45:16,479 INFO L85 PathProgramCache]: Analyzing trace with hash -650724744, now seen corresponding path program 1 times [2022-11-21 13:45:16,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:45:16,479 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117311634] [2022-11-21 13:45:16,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:45:16,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:45:16,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:45:16,569 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 13:45:16,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:45:16,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117311634] [2022-11-21 13:45:16,570 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [117311634] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 13:45:16,570 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 13:45:16,570 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 13:45:16,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133205620] [2022-11-21 13:45:16,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 13:45:16,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-21 13:45:16,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:45:16,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-21 13:45:16,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-21 13:45:16,572 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 104 [2022-11-21 13:45:16,573 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 101 transitions, 409 flow. Second operand has 4 states, 4 states have (on average 81.0) internal successors, (324), 4 states have internal predecessors, (324), 0 states have call successors, (0), 0 states 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 13:45:16,573 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 13:45:16,573 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 104 [2022-11-21 13:45:16,573 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 13:45:16,905 INFO L130 PetriNetUnfolder]: 457/1568 cut-off events. [2022-11-21 13:45:16,905 INFO L131 PetriNetUnfolder]: For 2942/3120 co-relation queries the response was YES. [2022-11-21 13:45:16,910 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3969 conditions, 1568 events. 457/1568 cut-off events. For 2942/3120 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 13259 event pairs, 193 based on Foata normal form. 28/1221 useless extension candidates. Maximal degree in co-relation 3660. Up to 732 conditions per place. [2022-11-21 13:45:16,918 INFO L137 encePairwiseOnDemand]: 98/104 looper letters, 69 selfloop transitions, 4 changer transitions 0/144 dead transitions. [2022-11-21 13:45:16,918 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 144 transitions, 876 flow [2022-11-21 13:45:16,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-21 13:45:16,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-21 13:45:16,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 434 transitions. [2022-11-21 13:45:16,921 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8346153846153846 [2022-11-21 13:45:16,921 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 434 transitions. [2022-11-21 13:45:16,921 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 434 transitions. [2022-11-21 13:45:16,922 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 13:45:16,922 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 434 transitions. [2022-11-21 13:45:16,923 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 86.8) internal successors, (434), 5 states have internal predecessors, (434), 0 states have call successors, (0), 0 states 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 13:45:16,924 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 104.0) internal successors, (624), 6 states have internal predecessors, (624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:45:16,926 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 104.0) internal successors, (624), 6 states have internal predecessors, (624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:45:16,926 INFO L175 Difference]: Start difference. First operand has 117 places, 101 transitions, 409 flow. Second operand 5 states and 434 transitions. [2022-11-21 13:45:16,926 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 144 transitions, 876 flow [2022-11-21 13:45:16,932 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 144 transitions, 862 flow, removed 0 selfloop flow, removed 5 redundant places. [2022-11-21 13:45:16,935 INFO L231 Difference]: Finished difference. Result has 119 places, 104 transitions, 425 flow [2022-11-21 13:45:16,935 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=395, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=425, PETRI_PLACES=119, PETRI_TRANSITIONS=104} [2022-11-21 13:45:16,936 INFO L288 CegarLoopForPetriNet]: 86 programPoint places, 33 predicate places. [2022-11-21 13:45:16,936 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 104 transitions, 425 flow [2022-11-21 13:45:16,937 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 81.0) internal successors, (324), 4 states have internal predecessors, (324), 0 states have call successors, (0), 0 states 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 13:45:16,937 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 13:45:16,937 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] [2022-11-21 13:45:16,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-21 13:45:16,938 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-21 13:45:16,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:45:16,938 INFO L85 PathProgramCache]: Analyzing trace with hash 208290301, now seen corresponding path program 1 times [2022-11-21 13:45:16,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:45:16,939 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871210728] [2022-11-21 13:45:16,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:45:16,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:45:16,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:45:17,157 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 13:45:17,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:45:17,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871210728] [2022-11-21 13:45:17,158 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [871210728] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 13:45:17,158 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 13:45:17,158 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-21 13:45:17,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574678294] [2022-11-21 13:45:17,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 13:45:17,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-21 13:45:17,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:45:17,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-21 13:45:17,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2022-11-21 13:45:17,161 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 104 [2022-11-21 13:45:17,162 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 104 transitions, 425 flow. Second operand has 7 states, 7 states have (on average 66.28571428571429) internal successors, (464), 7 states have internal predecessors, (464), 0 states have call successors, (0), 0 states 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 13:45:17,162 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 13:45:17,162 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 104 [2022-11-21 13:45:17,162 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 13:45:17,609 INFO L130 PetriNetUnfolder]: 483/2003 cut-off events. [2022-11-21 13:45:17,609 INFO L131 PetriNetUnfolder]: For 2241/2241 co-relation queries the response was YES. [2022-11-21 13:45:17,615 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4867 conditions, 2003 events. 483/2003 cut-off events. For 2241/2241 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 16310 event pairs, 339 based on Foata normal form. 0/1714 useless extension candidates. Maximal degree in co-relation 3856. Up to 999 conditions per place. [2022-11-21 13:45:17,624 INFO L137 encePairwiseOnDemand]: 96/104 looper letters, 51 selfloop transitions, 7 changer transitions 1/117 dead transitions. [2022-11-21 13:45:17,624 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 117 transitions, 581 flow [2022-11-21 13:45:17,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-21 13:45:17,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-11-21 13:45:17,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 555 transitions. [2022-11-21 13:45:17,627 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6670673076923077 [2022-11-21 13:45:17,627 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 555 transitions. [2022-11-21 13:45:17,627 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 555 transitions. [2022-11-21 13:45:17,628 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 13:45:17,628 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 555 transitions. [2022-11-21 13:45:17,629 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 69.375) internal successors, (555), 8 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 13:45:17,631 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 104.0) internal successors, (936), 9 states have internal predecessors, (936), 0 states have call successors, (0), 0 states 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 13:45:17,632 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 104.0) internal successors, (936), 9 states have internal predecessors, (936), 0 states have call successors, (0), 0 states 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 13:45:17,632 INFO L175 Difference]: Start difference. First operand has 119 places, 104 transitions, 425 flow. Second operand 8 states and 555 transitions. [2022-11-21 13:45:17,632 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 117 transitions, 581 flow [2022-11-21 13:45:17,641 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 117 transitions, 579 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-21 13:45:17,643 INFO L231 Difference]: Finished difference. Result has 128 places, 106 transitions, 455 flow [2022-11-21 13:45:17,643 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=423, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=455, PETRI_PLACES=128, PETRI_TRANSITIONS=106} [2022-11-21 13:45:17,644 INFO L288 CegarLoopForPetriNet]: 86 programPoint places, 42 predicate places. [2022-11-21 13:45:17,644 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 106 transitions, 455 flow [2022-11-21 13:45:17,645 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 66.28571428571429) internal successors, (464), 7 states have internal predecessors, (464), 0 states have call successors, (0), 0 states 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 13:45:17,645 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 13:45:17,645 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] [2022-11-21 13:45:17,645 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-21 13:45:17,645 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-21 13:45:17,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:45:17,646 INFO L85 PathProgramCache]: Analyzing trace with hash 283275449, now seen corresponding path program 1 times [2022-11-21 13:45:17,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:45:17,646 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145652944] [2022-11-21 13:45:17,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:45:17,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:45:17,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:45:17,736 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 13:45:17,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:45:17,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145652944] [2022-11-21 13:45:17,737 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1145652944] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 13:45:17,737 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 13:45:17,737 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-21 13:45:17,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396636027] [2022-11-21 13:45:17,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 13:45:17,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-21 13:45:17,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:45:17,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-21 13:45:17,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-21 13:45:17,739 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 104 [2022-11-21 13:45:17,740 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 106 transitions, 455 flow. Second operand has 6 states, 6 states have (on average 71.83333333333333) internal successors, (431), 6 states have internal predecessors, (431), 0 states have call successors, (0), 0 states 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 13:45:17,740 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 13:45:17,740 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 104 [2022-11-21 13:45:17,740 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 13:45:18,225 INFO L130 PetriNetUnfolder]: 503/2050 cut-off events. [2022-11-21 13:45:18,226 INFO L131 PetriNetUnfolder]: For 2330/2359 co-relation queries the response was YES. [2022-11-21 13:45:18,233 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5068 conditions, 2050 events. 503/2050 cut-off events. For 2330/2359 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 17374 event pairs, 283 based on Foata normal form. 12/1899 useless extension candidates. Maximal degree in co-relation 4924. Up to 820 conditions per place. [2022-11-21 13:45:18,243 INFO L137 encePairwiseOnDemand]: 94/104 looper letters, 61 selfloop transitions, 9 changer transitions 4/138 dead transitions. [2022-11-21 13:45:18,243 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 138 transitions, 822 flow [2022-11-21 13:45:18,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-21 13:45:18,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-11-21 13:45:18,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 598 transitions. [2022-11-21 13:45:18,246 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.71875 [2022-11-21 13:45:18,246 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 598 transitions. [2022-11-21 13:45:18,246 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 598 transitions. [2022-11-21 13:45:18,247 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 13:45:18,247 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 598 transitions. [2022-11-21 13:45:18,249 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 74.75) internal successors, (598), 8 states have internal predecessors, (598), 0 states have call successors, (0), 0 states 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 13:45:18,251 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 104.0) internal successors, (936), 9 states have internal predecessors, (936), 0 states have call successors, (0), 0 states 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 13:45:18,252 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 104.0) internal successors, (936), 9 states have internal predecessors, (936), 0 states have call successors, (0), 0 states 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 13:45:18,252 INFO L175 Difference]: Start difference. First operand has 128 places, 106 transitions, 455 flow. Second operand 8 states and 598 transitions. [2022-11-21 13:45:18,253 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 138 transitions, 822 flow [2022-11-21 13:45:18,263 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 138 transitions, 813 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-11-21 13:45:18,265 INFO L231 Difference]: Finished difference. Result has 134 places, 106 transitions, 476 flow [2022-11-21 13:45:18,266 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=442, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=476, PETRI_PLACES=134, PETRI_TRANSITIONS=106} [2022-11-21 13:45:18,267 INFO L288 CegarLoopForPetriNet]: 86 programPoint places, 48 predicate places. [2022-11-21 13:45:18,267 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 106 transitions, 476 flow [2022-11-21 13:45:18,267 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 71.83333333333333) internal successors, (431), 6 states have internal predecessors, (431), 0 states have call successors, (0), 0 states 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 13:45:18,268 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 13:45:18,268 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] [2022-11-21 13:45:18,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-21 13:45:18,268 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-21 13:45:18,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:45:18,269 INFO L85 PathProgramCache]: Analyzing trace with hash -540023610, now seen corresponding path program 1 times [2022-11-21 13:45:18,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:45:18,269 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060799975] [2022-11-21 13:45:18,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:45:18,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:45:18,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:45:18,359 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-21 13:45:18,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:45:18,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060799975] [2022-11-21 13:45:18,360 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1060799975] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 13:45:18,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [281597599] [2022-11-21 13:45:18,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:45:18,360 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:45:18,361 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a81894e-faa0-4391-ae31-5501de5b18e3/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 13:45:18,363 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a81894e-faa0-4391-ae31-5501de5b18e3/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 13:45:18,391 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a81894e-faa0-4391-ae31-5501de5b18e3/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-21 13:45:18,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:45:18,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-21 13:45:18,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 13:45:18,493 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-21 13:45:18,493 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 13:45:18,545 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-21 13:45:18,545 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [281597599] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 13:45:18,545 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 13:45:18,546 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2022-11-21 13:45:18,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326003868] [2022-11-21 13:45:18,546 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 13:45:18,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-21 13:45:18,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:45:18,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-21 13:45:18,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-11-21 13:45:18,549 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 104 [2022-11-21 13:45:18,550 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 106 transitions, 476 flow. Second operand has 12 states, 12 states have (on average 81.83333333333333) internal successors, (982), 12 states have internal predecessors, (982), 0 states have call successors, (0), 0 states 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 13:45:18,550 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 13:45:18,550 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 104 [2022-11-21 13:45:18,551 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 13:45:19,385 INFO L130 PetriNetUnfolder]: 989/3131 cut-off events. [2022-11-21 13:45:19,385 INFO L131 PetriNetUnfolder]: For 6463/6586 co-relation queries the response was YES. [2022-11-21 13:45:19,398 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9172 conditions, 3131 events. 989/3131 cut-off events. For 6463/6586 co-relation queries the response was YES. Maximal size of possible extension queue 204. Compared 29071 event pairs, 83 based on Foata normal form. 102/3032 useless extension candidates. Maximal degree in co-relation 8980. Up to 442 conditions per place. [2022-11-21 13:45:19,416 INFO L137 encePairwiseOnDemand]: 97/104 looper letters, 229 selfloop transitions, 18 changer transitions 0/319 dead transitions. [2022-11-21 13:45:19,416 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 319 transitions, 2638 flow [2022-11-21 13:45:19,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-21 13:45:19,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-11-21 13:45:19,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1533 transitions. [2022-11-21 13:45:19,421 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8189102564102564 [2022-11-21 13:45:19,421 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1533 transitions. [2022-11-21 13:45:19,421 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1533 transitions. [2022-11-21 13:45:19,423 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 13:45:19,423 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1533 transitions. [2022-11-21 13:45:19,427 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 85.16666666666667) internal successors, (1533), 18 states have internal predecessors, (1533), 0 states have call successors, (0), 0 states 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 13:45:19,432 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 104.0) internal successors, (1976), 19 states have internal predecessors, (1976), 0 states have call successors, (0), 0 states 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 13:45:19,433 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 104.0) internal successors, (1976), 19 states have internal predecessors, (1976), 0 states have call successors, (0), 0 states 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 13:45:19,434 INFO L175 Difference]: Start difference. First operand has 134 places, 106 transitions, 476 flow. Second operand 18 states and 1533 transitions. [2022-11-21 13:45:19,434 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 319 transitions, 2638 flow [2022-11-21 13:45:19,455 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 319 transitions, 2620 flow, removed 2 selfloop flow, removed 7 redundant places. [2022-11-21 13:45:19,459 INFO L231 Difference]: Finished difference. Result has 147 places, 118 transitions, 564 flow [2022-11-21 13:45:19,461 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=458, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=564, PETRI_PLACES=147, PETRI_TRANSITIONS=118} [2022-11-21 13:45:19,461 INFO L288 CegarLoopForPetriNet]: 86 programPoint places, 61 predicate places. [2022-11-21 13:45:19,462 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 118 transitions, 564 flow [2022-11-21 13:45:19,462 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 81.83333333333333) internal successors, (982), 12 states have internal predecessors, (982), 0 states have call successors, (0), 0 states 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 13:45:19,462 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 13:45:19,463 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] [2022-11-21 13:45:19,469 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a81894e-faa0-4391-ae31-5501de5b18e3/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-21 13:45:19,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a81894e-faa0-4391-ae31-5501de5b18e3/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-21 13:45:19,669 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-21 13:45:19,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:45:19,669 INFO L85 PathProgramCache]: Analyzing trace with hash -765719959, now seen corresponding path program 1 times [2022-11-21 13:45:19,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:45:19,670 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790901534] [2022-11-21 13:45:19,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:45:19,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:45:19,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:45:19,763 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-21 13:45:19,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:45:19,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790901534] [2022-11-21 13:45:19,763 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1790901534] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 13:45:19,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [866169905] [2022-11-21 13:45:19,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:45:19,764 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:45:19,764 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a81894e-faa0-4391-ae31-5501de5b18e3/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 13:45:19,765 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a81894e-faa0-4391-ae31-5501de5b18e3/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 13:45:19,791 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a81894e-faa0-4391-ae31-5501de5b18e3/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-21 13:45:19,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:45:19,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-21 13:45:19,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 13:45:19,908 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-21 13:45:19,908 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-21 13:45:19,908 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [866169905] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 13:45:19,908 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-21 13:45:19,908 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2022-11-21 13:45:19,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838484907] [2022-11-21 13:45:19,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 13:45:19,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-21 13:45:19,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:45:19,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-21 13:45:19,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-21 13:45:19,911 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 104 [2022-11-21 13:45:19,911 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 118 transitions, 564 flow. Second operand has 6 states, 6 states have (on average 81.66666666666667) internal successors, (490), 6 states have internal predecessors, (490), 0 states have call successors, (0), 0 states 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 13:45:19,912 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 13:45:19,912 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 104 [2022-11-21 13:45:19,912 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 13:45:20,573 INFO L130 PetriNetUnfolder]: 903/2849 cut-off events. [2022-11-21 13:45:20,573 INFO L131 PetriNetUnfolder]: For 6750/6873 co-relation queries the response was YES. [2022-11-21 13:45:20,584 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8936 conditions, 2849 events. 903/2849 cut-off events. For 6750/6873 co-relation queries the response was YES. Maximal size of possible extension queue 187. Compared 26472 event pairs, 134 based on Foata normal form. 128/2706 useless extension candidates. Maximal degree in co-relation 8665. Up to 844 conditions per place. [2022-11-21 13:45:20,599 INFO L137 encePairwiseOnDemand]: 99/104 looper letters, 86 selfloop transitions, 11 changer transitions 0/169 dead transitions. [2022-11-21 13:45:20,599 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 169 transitions, 1168 flow [2022-11-21 13:45:20,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-21 13:45:20,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-21 13:45:20,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 596 transitions. [2022-11-21 13:45:20,601 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8186813186813187 [2022-11-21 13:45:20,601 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 596 transitions. [2022-11-21 13:45:20,601 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 596 transitions. [2022-11-21 13:45:20,602 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 13:45:20,602 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 596 transitions. [2022-11-21 13:45:20,604 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 85.14285714285714) internal successors, (596), 7 states have internal predecessors, (596), 0 states have call successors, (0), 0 states 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 13:45:20,605 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 104.0) internal successors, (832), 8 states have internal predecessors, (832), 0 states have call successors, (0), 0 states 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 13:45:20,606 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 104.0) internal successors, (832), 8 states have internal predecessors, (832), 0 states have call successors, (0), 0 states 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 13:45:20,606 INFO L175 Difference]: Start difference. First operand has 147 places, 118 transitions, 564 flow. Second operand 7 states and 596 transitions. [2022-11-21 13:45:20,606 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 169 transitions, 1168 flow [2022-11-21 13:45:20,620 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 169 transitions, 1136 flow, removed 11 selfloop flow, removed 5 redundant places. [2022-11-21 13:45:20,623 INFO L231 Difference]: Finished difference. Result has 143 places, 114 transitions, 527 flow [2022-11-21 13:45:20,623 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=505, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=527, PETRI_PLACES=143, PETRI_TRANSITIONS=114} [2022-11-21 13:45:20,624 INFO L288 CegarLoopForPetriNet]: 86 programPoint places, 57 predicate places. [2022-11-21 13:45:20,624 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 114 transitions, 527 flow [2022-11-21 13:45:20,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 81.66666666666667) internal successors, (490), 6 states have internal predecessors, (490), 0 states have call successors, (0), 0 states 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 13:45:20,625 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 13:45:20,625 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] [2022-11-21 13:45:20,635 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a81894e-faa0-4391-ae31-5501de5b18e3/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-21 13:45:20,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a81894e-faa0-4391-ae31-5501de5b18e3/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:45:20,830 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-21 13:45:20,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:45:20,831 INFO L85 PathProgramCache]: Analyzing trace with hash 106812249, now seen corresponding path program 1 times [2022-11-21 13:45:20,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:45:20,831 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102668275] [2022-11-21 13:45:20,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:45:20,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:45:20,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:45:21,067 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 13:45:21,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:45:21,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102668275] [2022-11-21 13:45:21,067 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [102668275] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 13:45:21,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [637989947] [2022-11-21 13:45:21,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:45:21,068 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:45:21,068 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a81894e-faa0-4391-ae31-5501de5b18e3/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 13:45:21,069 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a81894e-faa0-4391-ae31-5501de5b18e3/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 13:45:21,095 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a81894e-faa0-4391-ae31-5501de5b18e3/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-21 13:45:21,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:45:21,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-21 13:45:21,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 13:45:21,555 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 13:45:21,555 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-21 13:45:21,555 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [637989947] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 13:45:21,555 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-21 13:45:21,555 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 13 [2022-11-21 13:45:21,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355719296] [2022-11-21 13:45:21,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 13:45:21,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-21 13:45:21,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:45:21,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-21 13:45:21,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2022-11-21 13:45:21,559 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 104 [2022-11-21 13:45:21,559 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 114 transitions, 527 flow. Second operand has 7 states, 7 states have (on average 66.85714285714286) internal successors, (468), 7 states have internal predecessors, (468), 0 states have call successors, (0), 0 states 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 13:45:21,560 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 13:45:21,560 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 104 [2022-11-21 13:45:21,560 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 13:45:22,265 INFO L130 PetriNetUnfolder]: 653/3088 cut-off events. [2022-11-21 13:45:22,265 INFO L131 PetriNetUnfolder]: For 4186/4227 co-relation queries the response was YES. [2022-11-21 13:45:22,277 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8178 conditions, 3088 events. 653/3088 cut-off events. For 4186/4227 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 28483 event pairs, 442 based on Foata normal form. 84/3098 useless extension candidates. Maximal degree in co-relation 7761. Up to 1415 conditions per place. [2022-11-21 13:45:22,288 INFO L137 encePairwiseOnDemand]: 97/104 looper letters, 32 selfloop transitions, 6 changer transitions 0/112 dead transitions. [2022-11-21 13:45:22,288 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 112 transitions, 595 flow [2022-11-21 13:45:22,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-21 13:45:22,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-21 13:45:22,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 474 transitions. [2022-11-21 13:45:22,290 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6510989010989011 [2022-11-21 13:45:22,290 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 474 transitions. [2022-11-21 13:45:22,290 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 474 transitions. [2022-11-21 13:45:22,291 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 13:45:22,291 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 474 transitions. [2022-11-21 13:45:22,292 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 67.71428571428571) internal successors, (474), 7 states have internal predecessors, (474), 0 states have call successors, (0), 0 states 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 13:45:22,294 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 104.0) internal successors, (832), 8 states have internal predecessors, (832), 0 states have call successors, (0), 0 states 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 13:45:22,294 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 104.0) internal successors, (832), 8 states have internal predecessors, (832), 0 states have call successors, (0), 0 states 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 13:45:22,294 INFO L175 Difference]: Start difference. First operand has 143 places, 114 transitions, 527 flow. Second operand 7 states and 474 transitions. [2022-11-21 13:45:22,295 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 112 transitions, 595 flow [2022-11-21 13:45:22,313 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 112 transitions, 571 flow, removed 0 selfloop flow, removed 7 redundant places. [2022-11-21 13:45:22,315 INFO L231 Difference]: Finished difference. Result has 141 places, 112 transitions, 507 flow [2022-11-21 13:45:22,315 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=495, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=507, PETRI_PLACES=141, PETRI_TRANSITIONS=112} [2022-11-21 13:45:22,316 INFO L288 CegarLoopForPetriNet]: 86 programPoint places, 55 predicate places. [2022-11-21 13:45:22,316 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 112 transitions, 507 flow [2022-11-21 13:45:22,317 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 66.85714285714286) internal successors, (468), 7 states have internal predecessors, (468), 0 states have call successors, (0), 0 states 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 13:45:22,317 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 13:45:22,317 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 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] [2022-11-21 13:45:22,327 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a81894e-faa0-4391-ae31-5501de5b18e3/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-21 13:45:22,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a81894e-faa0-4391-ae31-5501de5b18e3/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-21 13:45:22,523 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-21 13:45:22,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:45:22,523 INFO L85 PathProgramCache]: Analyzing trace with hash -1168305961, now seen corresponding path program 2 times [2022-11-21 13:45:22,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:45:22,523 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815519278] [2022-11-21 13:45:22,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:45:22,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:45:22,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:45:22,616 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:45:22,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:45:22,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815519278] [2022-11-21 13:45:22,617 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [815519278] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 13:45:22,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2101005337] [2022-11-21 13:45:22,618 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-21 13:45:22,618 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:45:22,618 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a81894e-faa0-4391-ae31-5501de5b18e3/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 13:45:22,619 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a81894e-faa0-4391-ae31-5501de5b18e3/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 13:45:22,648 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a81894e-faa0-4391-ae31-5501de5b18e3/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-21 13:45:22,705 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-21 13:45:22,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 13:45:22,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-21 13:45:22,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 13:45:22,792 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:45:22,792 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 13:45:22,923 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:45:22,924 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2101005337] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 13:45:22,924 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 13:45:22,924 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-11-21 13:45:22,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475813522] [2022-11-21 13:45:22,924 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 13:45:22,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-21 13:45:22,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:45:22,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-21 13:45:22,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-11-21 13:45:22,927 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 104 [2022-11-21 13:45:22,928 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 112 transitions, 507 flow. Second operand has 13 states, 13 states have (on average 88.3076923076923) internal successors, (1148), 13 states have internal predecessors, (1148), 0 states have call successors, (0), 0 states 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 13:45:22,928 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 13:45:22,928 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 104 [2022-11-21 13:45:22,928 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 13:45:23,690 INFO L130 PetriNetUnfolder]: 293/2877 cut-off events. [2022-11-21 13:45:23,691 INFO L131 PetriNetUnfolder]: For 5872/5937 co-relation queries the response was YES. [2022-11-21 13:45:23,707 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6860 conditions, 2877 events. 293/2877 cut-off events. For 5872/5937 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 27060 event pairs, 20 based on Foata normal form. 260/3123 useless extension candidates. Maximal degree in co-relation 6798. Up to 230 conditions per place. [2022-11-21 13:45:23,720 INFO L137 encePairwiseOnDemand]: 99/104 looper letters, 44 selfloop transitions, 46 changer transitions 0/181 dead transitions. [2022-11-21 13:45:23,721 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 181 transitions, 1111 flow [2022-11-21 13:45:23,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-21 13:45:23,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-11-21 13:45:23,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1123 transitions. [2022-11-21 13:45:23,725 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8998397435897436 [2022-11-21 13:45:23,725 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1123 transitions. [2022-11-21 13:45:23,725 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1123 transitions. [2022-11-21 13:45:23,727 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 13:45:23,727 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1123 transitions. [2022-11-21 13:45:23,731 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 93.58333333333333) internal successors, (1123), 12 states have internal predecessors, (1123), 0 states have call successors, (0), 0 states 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 13:45:23,734 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 104.0) internal successors, (1352), 13 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 13:45:23,735 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 104.0) internal successors, (1352), 13 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 13:45:23,735 INFO L175 Difference]: Start difference. First operand has 141 places, 112 transitions, 507 flow. Second operand 12 states and 1123 transitions. [2022-11-21 13:45:23,735 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 181 transitions, 1111 flow [2022-11-21 13:45:23,755 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 181 transitions, 1100 flow, removed 0 selfloop flow, removed 5 redundant places. [2022-11-21 13:45:23,758 INFO L231 Difference]: Finished difference. Result has 157 places, 151 transitions, 1092 flow [2022-11-21 13:45:23,759 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=496, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1092, PETRI_PLACES=157, PETRI_TRANSITIONS=151} [2022-11-21 13:45:23,760 INFO L288 CegarLoopForPetriNet]: 86 programPoint places, 71 predicate places. [2022-11-21 13:45:23,760 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 151 transitions, 1092 flow [2022-11-21 13:45:23,760 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 88.3076923076923) internal successors, (1148), 13 states have internal predecessors, (1148), 0 states have call successors, (0), 0 states 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 13:45:23,761 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 13:45:23,761 INFO L209 CegarLoopForPetriNet]: trace histogram [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] [2022-11-21 13:45:23,772 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a81894e-faa0-4391-ae31-5501de5b18e3/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-21 13:45:23,966 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a81894e-faa0-4391-ae31-5501de5b18e3/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-21 13:45:23,966 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-21 13:45:23,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:45:23,967 INFO L85 PathProgramCache]: Analyzing trace with hash -1755553350, now seen corresponding path program 2 times [2022-11-21 13:45:23,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:45:23,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584868748] [2022-11-21 13:45:23,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:45:23,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:45:23,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:45:24,165 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:45:24,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:45:24,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584868748] [2022-11-21 13:45:24,165 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1584868748] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 13:45:24,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1823555183] [2022-11-21 13:45:24,166 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-21 13:45:24,166 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:45:24,166 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a81894e-faa0-4391-ae31-5501de5b18e3/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 13:45:24,167 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a81894e-faa0-4391-ae31-5501de5b18e3/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 13:45:24,187 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a81894e-faa0-4391-ae31-5501de5b18e3/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-21 13:45:24,240 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-21 13:45:24,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 13:45:24,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-21 13:45:24,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 13:45:24,362 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-11-21 13:45:24,362 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 13:45:24,460 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-11-21 13:45:24,461 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1823555183] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 13:45:24,461 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 13:45:24,461 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 5, 5] total 15 [2022-11-21 13:45:24,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794695934] [2022-11-21 13:45:24,462 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 13:45:24,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-21 13:45:24,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:45:24,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-21 13:45:24,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2022-11-21 13:45:24,464 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 104 [2022-11-21 13:45:24,466 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 151 transitions, 1092 flow. Second operand has 16 states, 16 states have (on average 71.5625) internal successors, (1145), 16 states have internal predecessors, (1145), 0 states have call successors, (0), 0 states 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 13:45:24,466 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 13:45:24,466 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 104 [2022-11-21 13:45:24,466 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 13:45:25,998 INFO L130 PetriNetUnfolder]: 1246/4719 cut-off events. [2022-11-21 13:45:25,998 INFO L131 PetriNetUnfolder]: For 29908/29996 co-relation queries the response was YES. [2022-11-21 13:45:26,027 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17910 conditions, 4719 events. 1246/4719 cut-off events. For 29908/29996 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 44698 event pairs, 46 based on Foata normal form. 157/4775 useless extension candidates. Maximal degree in co-relation 17837. Up to 1050 conditions per place. [2022-11-21 13:45:26,053 INFO L137 encePairwiseOnDemand]: 95/104 looper letters, 332 selfloop transitions, 23 changer transitions 0/418 dead transitions. [2022-11-21 13:45:26,053 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 418 transitions, 4775 flow [2022-11-21 13:45:26,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-21 13:45:26,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2022-11-21 13:45:26,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1622 transitions. [2022-11-21 13:45:26,057 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.708916083916084 [2022-11-21 13:45:26,057 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1622 transitions. [2022-11-21 13:45:26,057 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1622 transitions. [2022-11-21 13:45:26,058 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 13:45:26,059 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1622 transitions. [2022-11-21 13:45:26,062 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 73.72727272727273) internal successors, (1622), 22 states have internal predecessors, (1622), 0 states have call successors, (0), 0 states 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 13:45:26,066 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 104.0) internal successors, (2392), 23 states have internal predecessors, (2392), 0 states have call successors, (0), 0 states 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 13:45:26,067 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 104.0) internal successors, (2392), 23 states have internal predecessors, (2392), 0 states have call successors, (0), 0 states 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 13:45:26,067 INFO L175 Difference]: Start difference. First operand has 157 places, 151 transitions, 1092 flow. Second operand 22 states and 1622 transitions. [2022-11-21 13:45:26,068 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 418 transitions, 4775 flow [2022-11-21 13:45:26,119 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 418 transitions, 4285 flow, removed 241 selfloop flow, removed 4 redundant places. [2022-11-21 13:45:26,124 INFO L231 Difference]: Finished difference. Result has 174 places, 155 transitions, 1049 flow [2022-11-21 13:45:26,124 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=972, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=1049, PETRI_PLACES=174, PETRI_TRANSITIONS=155} [2022-11-21 13:45:26,125 INFO L288 CegarLoopForPetriNet]: 86 programPoint places, 88 predicate places. [2022-11-21 13:45:26,125 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 155 transitions, 1049 flow [2022-11-21 13:45:26,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 71.5625) internal successors, (1145), 16 states have internal predecessors, (1145), 0 states have call successors, (0), 0 states 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 13:45:26,126 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 13:45:26,126 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:45:26,136 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a81894e-faa0-4391-ae31-5501de5b18e3/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-21 13:45:26,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a81894e-faa0-4391-ae31-5501de5b18e3/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-21 13:45:26,332 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-21 13:45:26,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:45:26,333 INFO L85 PathProgramCache]: Analyzing trace with hash -769297139, now seen corresponding path program 1 times [2022-11-21 13:45:26,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:45:26,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253776117] [2022-11-21 13:45:26,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:45:26,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:45:26,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:45:26,478 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:45:26,478 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:45:26,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253776117] [2022-11-21 13:45:26,479 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [253776117] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 13:45:26,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [107776092] [2022-11-21 13:45:26,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:45:26,479 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:45:26,479 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a81894e-faa0-4391-ae31-5501de5b18e3/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 13:45:26,480 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a81894e-faa0-4391-ae31-5501de5b18e3/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 13:45:26,512 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a81894e-faa0-4391-ae31-5501de5b18e3/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-21 13:45:26,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:45:26,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-21 13:45:26,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 13:45:26,774 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-21 13:45:26,774 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 13:45:26,914 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-21 13:45:26,915 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [107776092] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 13:45:26,915 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 13:45:26,915 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 5] total 16 [2022-11-21 13:45:26,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89051187] [2022-11-21 13:45:26,916 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 13:45:26,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-21 13:45:26,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:45:26,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-21 13:45:26,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2022-11-21 13:45:26,918 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 104 [2022-11-21 13:45:26,919 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 155 transitions, 1049 flow. Second operand has 17 states, 17 states have (on average 65.6470588235294) internal successors, (1116), 17 states have internal predecessors, (1116), 0 states have call successors, (0), 0 states 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 13:45:26,919 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 13:45:26,919 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 104 [2022-11-21 13:45:26,920 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 13:45:32,145 INFO L130 PetriNetUnfolder]: 8388/24318 cut-off events. [2022-11-21 13:45:32,146 INFO L131 PetriNetUnfolder]: For 58613/59146 co-relation queries the response was YES. [2022-11-21 13:45:32,295 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72771 conditions, 24318 events. 8388/24318 cut-off events. For 58613/59146 co-relation queries the response was YES. Maximal size of possible extension queue 475. Compared 262572 event pairs, 3259 based on Foata normal form. 670/24884 useless extension candidates. Maximal degree in co-relation 72694. Up to 8724 conditions per place. [2022-11-21 13:45:32,405 INFO L137 encePairwiseOnDemand]: 91/104 looper letters, 446 selfloop transitions, 35 changer transitions 27/555 dead transitions. [2022-11-21 13:45:32,405 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 555 transitions, 5572 flow [2022-11-21 13:45:32,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-21 13:45:32,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2022-11-21 13:45:32,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 1757 transitions. [2022-11-21 13:45:32,410 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6497781065088757 [2022-11-21 13:45:32,410 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 1757 transitions. [2022-11-21 13:45:32,410 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 1757 transitions. [2022-11-21 13:45:32,411 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 13:45:32,412 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 1757 transitions. [2022-11-21 13:45:32,416 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 67.57692307692308) internal successors, (1757), 26 states have internal predecessors, (1757), 0 states have call successors, (0), 0 states 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 13:45:32,421 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 104.0) internal successors, (2808), 27 states have internal predecessors, (2808), 0 states have call successors, (0), 0 states 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 13:45:32,422 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 104.0) internal successors, (2808), 27 states have internal predecessors, (2808), 0 states have call successors, (0), 0 states 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 13:45:32,423 INFO L175 Difference]: Start difference. First operand has 174 places, 155 transitions, 1049 flow. Second operand 26 states and 1757 transitions. [2022-11-21 13:45:32,423 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 555 transitions, 5572 flow [2022-11-21 13:45:32,625 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 555 transitions, 5328 flow, removed 16 selfloop flow, removed 16 redundant places. [2022-11-21 13:45:32,632 INFO L231 Difference]: Finished difference. Result has 194 places, 181 transitions, 1288 flow [2022-11-21 13:45:32,633 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=989, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=1288, PETRI_PLACES=194, PETRI_TRANSITIONS=181} [2022-11-21 13:45:32,634 INFO L288 CegarLoopForPetriNet]: 86 programPoint places, 108 predicate places. [2022-11-21 13:45:32,634 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 181 transitions, 1288 flow [2022-11-21 13:45:32,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 65.6470588235294) internal successors, (1116), 17 states have internal predecessors, (1116), 0 states have call successors, (0), 0 states 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 13:45:32,651 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 13:45:32,651 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 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] [2022-11-21 13:45:32,664 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a81894e-faa0-4391-ae31-5501de5b18e3/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-21 13:45:32,864 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a81894e-faa0-4391-ae31-5501de5b18e3/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-21 13:45:32,865 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-21 13:45:32,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:45:32,865 INFO L85 PathProgramCache]: Analyzing trace with hash -579249570, now seen corresponding path program 2 times [2022-11-21 13:45:32,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:45:32,865 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763212619] [2022-11-21 13:45:32,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:45:32,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:45:32,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:45:33,127 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 25 proven. 61 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-21 13:45:33,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:45:33,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763212619] [2022-11-21 13:45:33,128 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763212619] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 13:45:33,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1190239436] [2022-11-21 13:45:33,129 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-21 13:45:33,129 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:45:33,129 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a81894e-faa0-4391-ae31-5501de5b18e3/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 13:45:33,130 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a81894e-faa0-4391-ae31-5501de5b18e3/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 13:45:33,148 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a81894e-faa0-4391-ae31-5501de5b18e3/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-21 13:45:33,231 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-21 13:45:33,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 13:45:33,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-21 13:45:33,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 13:45:33,338 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 25 proven. 61 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-21 13:45:33,338 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 13:45:33,553 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 25 proven. 61 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-21 13:45:33,554 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1190239436] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 13:45:33,554 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 13:45:33,554 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-11-21 13:45:33,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649937121] [2022-11-21 13:45:33,554 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 13:45:33,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-21 13:45:33,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:45:33,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-21 13:45:33,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=397, Unknown=0, NotChecked=0, Total=552 [2022-11-21 13:45:33,558 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 104 [2022-11-21 13:45:33,561 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 181 transitions, 1288 flow. Second operand has 24 states, 24 states have (on average 82.375) internal successors, (1977), 24 states have internal predecessors, (1977), 0 states have call successors, (0), 0 states 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 13:45:33,562 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 13:45:33,562 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 104 [2022-11-21 13:45:33,562 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 13:45:37,947 INFO L130 PetriNetUnfolder]: 5763/15899 cut-off events. [2022-11-21 13:45:37,947 INFO L131 PetriNetUnfolder]: For 75703/76875 co-relation queries the response was YES. [2022-11-21 13:45:38,015 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56516 conditions, 15899 events. 5763/15899 cut-off events. For 75703/76875 co-relation queries the response was YES. Maximal size of possible extension queue 394. Compared 167171 event pairs, 278 based on Foata normal form. 577/15112 useless extension candidates. Maximal degree in co-relation 56433. Up to 2750 conditions per place. [2022-11-21 13:45:38,204 INFO L137 encePairwiseOnDemand]: 98/104 looper letters, 1226 selfloop transitions, 47 changer transitions 0/1355 dead transitions. [2022-11-21 13:45:38,204 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 1355 transitions, 16677 flow [2022-11-21 13:45:38,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-11-21 13:45:38,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2022-11-21 13:45:38,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 2729 transitions. [2022-11-21 13:45:38,211 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8200120192307693 [2022-11-21 13:45:38,211 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 2729 transitions. [2022-11-21 13:45:38,211 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 2729 transitions. [2022-11-21 13:45:38,213 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 13:45:38,213 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 2729 transitions. [2022-11-21 13:45:38,217 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 85.28125) internal successors, (2729), 32 states have internal predecessors, (2729), 0 states have call successors, (0), 0 states 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 13:45:38,222 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 104.0) internal successors, (3432), 33 states have internal predecessors, (3432), 0 states have call successors, (0), 0 states 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 13:45:38,224 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 104.0) internal successors, (3432), 33 states have internal predecessors, (3432), 0 states have call successors, (0), 0 states 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 13:45:38,225 INFO L175 Difference]: Start difference. First operand has 194 places, 181 transitions, 1288 flow. Second operand 32 states and 2729 transitions. [2022-11-21 13:45:38,225 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 1355 transitions, 16677 flow [2022-11-21 13:45:38,626 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 1355 transitions, 16650 flow, removed 8 selfloop flow, removed 3 redundant places. [2022-11-21 13:45:38,640 INFO L231 Difference]: Finished difference. Result has 224 places, 200 transitions, 1487 flow [2022-11-21 13:45:38,641 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=1261, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=1487, PETRI_PLACES=224, PETRI_TRANSITIONS=200} [2022-11-21 13:45:38,642 INFO L288 CegarLoopForPetriNet]: 86 programPoint places, 138 predicate places. [2022-11-21 13:45:38,642 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 200 transitions, 1487 flow [2022-11-21 13:45:38,643 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 82.375) internal successors, (1977), 24 states have internal predecessors, (1977), 0 states have call successors, (0), 0 states 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 13:45:38,643 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 13:45:38,643 INFO L209 CegarLoopForPetriNet]: trace histogram [11, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:45:38,656 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a81894e-faa0-4391-ae31-5501de5b18e3/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-21 13:45:38,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a81894e-faa0-4391-ae31-5501de5b18e3/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-21 13:45:38,849 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-21 13:45:38,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:45:38,849 INFO L85 PathProgramCache]: Analyzing trace with hash 312268183, now seen corresponding path program 3 times [2022-11-21 13:45:38,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:45:38,850 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284226705] [2022-11-21 13:45:38,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:45:38,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:45:38,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:45:39,090 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 0 proven. 335 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:45:39,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:45:39,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284226705] [2022-11-21 13:45:39,091 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284226705] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 13:45:39,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [334491207] [2022-11-21 13:45:39,091 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-21 13:45:39,091 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:45:39,091 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a81894e-faa0-4391-ae31-5501de5b18e3/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 13:45:39,092 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a81894e-faa0-4391-ae31-5501de5b18e3/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 13:45:39,111 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a81894e-faa0-4391-ae31-5501de5b18e3/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-21 13:45:39,192 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-11-21 13:45:39,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 13:45:39,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-21 13:45:39,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 13:45:39,365 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 0 proven. 335 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:45:39,365 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 13:45:39,719 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 0 proven. 335 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:45:39,720 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [334491207] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 13:45:39,720 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 13:45:39,720 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2022-11-21 13:45:39,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766517609] [2022-11-21 13:45:39,720 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 13:45:39,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-21 13:45:39,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:45:39,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-21 13:45:39,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2022-11-21 13:45:39,723 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 104 [2022-11-21 13:45:39,725 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 200 transitions, 1487 flow. Second operand has 25 states, 25 states have (on average 88.16) internal successors, (2204), 25 states have internal predecessors, (2204), 0 states have call successors, (0), 0 states 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 13:45:39,726 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 13:45:39,726 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 104 [2022-11-21 13:45:39,726 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 13:45:44,669 INFO L130 PetriNetUnfolder]: 2400/18810 cut-off events. [2022-11-21 13:45:44,669 INFO L131 PetriNetUnfolder]: For 151711/152269 co-relation queries the response was YES. [2022-11-21 13:45:44,800 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54131 conditions, 18810 events. 2400/18810 cut-off events. For 151711/152269 co-relation queries the response was YES. Maximal size of possible extension queue 300. Compared 227836 event pairs, 52 based on Foata normal form. 1444/20174 useless extension candidates. Maximal degree in co-relation 54043. Up to 2013 conditions per place. [2022-11-21 13:45:44,860 INFO L137 encePairwiseOnDemand]: 99/104 looper letters, 57 selfloop transitions, 206 changer transitions 0/404 dead transitions. [2022-11-21 13:45:44,860 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 404 transitions, 3602 flow [2022-11-21 13:45:44,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-21 13:45:44,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2022-11-21 13:45:44,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 2228 transitions. [2022-11-21 13:45:44,865 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8926282051282052 [2022-11-21 13:45:44,866 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 2228 transitions. [2022-11-21 13:45:44,866 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 2228 transitions. [2022-11-21 13:45:44,867 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 13:45:44,867 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 2228 transitions. [2022-11-21 13:45:44,872 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 92.83333333333333) internal successors, (2228), 24 states have internal predecessors, (2228), 0 states have call successors, (0), 0 states 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 13:45:44,876 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 104.0) internal successors, (2600), 25 states have internal predecessors, (2600), 0 states have call successors, (0), 0 states 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 13:45:44,877 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 104.0) internal successors, (2600), 25 states have internal predecessors, (2600), 0 states have call successors, (0), 0 states 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 13:45:44,878 INFO L175 Difference]: Start difference. First operand has 224 places, 200 transitions, 1487 flow. Second operand 24 states and 2228 transitions. [2022-11-21 13:45:44,878 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 404 transitions, 3602 flow [2022-11-21 13:45:45,303 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 404 transitions, 3538 flow, removed 8 selfloop flow, removed 11 redundant places. [2022-11-21 13:45:45,310 INFO L231 Difference]: Finished difference. Result has 258 places, 360 transitions, 3878 flow [2022-11-21 13:45:45,311 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=1423, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=200, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=3878, PETRI_PLACES=258, PETRI_TRANSITIONS=360} [2022-11-21 13:45:45,311 INFO L288 CegarLoopForPetriNet]: 86 programPoint places, 172 predicate places. [2022-11-21 13:45:45,312 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 360 transitions, 3878 flow [2022-11-21 13:45:45,312 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 88.16) internal successors, (2204), 25 states have internal predecessors, (2204), 0 states have call successors, (0), 0 states 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 13:45:45,313 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 13:45:45,313 INFO L209 CegarLoopForPetriNet]: trace histogram [11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:45:45,323 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a81894e-faa0-4391-ae31-5501de5b18e3/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-11-21 13:45:45,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a81894e-faa0-4391-ae31-5501de5b18e3/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-21 13:45:45,518 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-21 13:45:45,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:45:45,519 INFO L85 PathProgramCache]: Analyzing trace with hash 1172350424, now seen corresponding path program 3 times [2022-11-21 13:45:45,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:45:45,519 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270753824] [2022-11-21 13:45:45,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:45:45,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:45:45,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:45:46,339 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 56 proven. 620 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-21 13:45:46,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:45:46,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270753824] [2022-11-21 13:45:46,340 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270753824] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 13:45:46,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1979624691] [2022-11-21 13:45:46,340 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-21 13:45:46,340 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:45:46,340 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a81894e-faa0-4391-ae31-5501de5b18e3/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 13:45:46,341 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a81894e-faa0-4391-ae31-5501de5b18e3/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 13:45:46,349 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a81894e-faa0-4391-ae31-5501de5b18e3/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-21 13:45:46,444 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-21 13:45:46,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 13:45:46,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-21 13:45:46,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 13:45:46,781 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 660 trivial. 0 not checked. [2022-11-21 13:45:46,781 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 13:45:47,097 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 660 trivial. 0 not checked. [2022-11-21 13:45:47,097 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1979624691] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 13:45:47,098 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 13:45:47,098 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 5, 5] total 27 [2022-11-21 13:45:47,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357188590] [2022-11-21 13:45:47,098 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 13:45:47,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-21 13:45:47,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:45:47,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-21 13:45:47,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=571, Unknown=0, NotChecked=0, Total=756 [2022-11-21 13:45:47,102 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 104 [2022-11-21 13:45:47,104 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 360 transitions, 3878 flow. Second operand has 28 states, 28 states have (on average 71.96428571428571) internal successors, (2015), 28 states have internal predecessors, (2015), 0 states have call successors, (0), 0 states 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 13:45:47,105 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 13:45:47,105 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 104 [2022-11-21 13:45:47,105 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 13:46:04,767 INFO L130 PetriNetUnfolder]: 19704/53925 cut-off events. [2022-11-21 13:46:04,768 INFO L131 PetriNetUnfolder]: For 531731/536809 co-relation queries the response was YES. [2022-11-21 13:46:05,543 INFO L83 FinitePrefix]: Finished finitePrefix Result has 212038 conditions, 53925 events. 19704/53925 cut-off events. For 531731/536809 co-relation queries the response was YES. Maximal size of possible extension queue 1204. Compared 672155 event pairs, 559 based on Foata normal form. 1343/50623 useless extension candidates. Maximal degree in co-relation 211921. Up to 9673 conditions per place. [2022-11-21 13:46:05,719 INFO L137 encePairwiseOnDemand]: 95/104 looper letters, 4613 selfloop transitions, 56 changer transitions 0/4745 dead transitions. [2022-11-21 13:46:05,719 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 4745 transitions, 74691 flow [2022-11-21 13:46:05,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-11-21 13:46:05,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2022-11-21 13:46:05,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 2952 transitions. [2022-11-21 13:46:05,726 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7096153846153846 [2022-11-21 13:46:05,726 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 2952 transitions. [2022-11-21 13:46:05,726 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 2952 transitions. [2022-11-21 13:46:05,727 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 13:46:05,727 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 2952 transitions. [2022-11-21 13:46:05,732 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 73.8) internal successors, (2952), 40 states have internal predecessors, (2952), 0 states have call successors, (0), 0 states 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 13:46:05,740 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 104.0) internal successors, (4264), 41 states have internal predecessors, (4264), 0 states have call successors, (0), 0 states 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 13:46:05,741 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 104.0) internal successors, (4264), 41 states have internal predecessors, (4264), 0 states have call successors, (0), 0 states 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 13:46:05,741 INFO L175 Difference]: Start difference. First operand has 258 places, 360 transitions, 3878 flow. Second operand 40 states and 2952 transitions. [2022-11-21 13:46:05,742 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 4745 transitions, 74691 flow [2022-11-21 13:46:07,653 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 4745 transitions, 67341 flow, removed 2963 selfloop flow, removed 15 redundant places. [2022-11-21 13:46:07,683 INFO L231 Difference]: Finished difference. Result has 282 places, 364 transitions, 3601 flow [2022-11-21 13:46:07,683 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=3448, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=359, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=307, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=3601, PETRI_PLACES=282, PETRI_TRANSITIONS=364} [2022-11-21 13:46:07,683 INFO L288 CegarLoopForPetriNet]: 86 programPoint places, 196 predicate places. [2022-11-21 13:46:07,683 INFO L495 AbstractCegarLoop]: Abstraction has has 282 places, 364 transitions, 3601 flow [2022-11-21 13:46:07,684 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 71.96428571428571) internal successors, (2015), 28 states have internal predecessors, (2015), 0 states have call successors, (0), 0 states 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 13:46:07,684 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 13:46:07,684 INFO L209 CegarLoopForPetriNet]: trace histogram [23, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:46:07,699 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a81894e-faa0-4391-ae31-5501de5b18e3/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-21 13:46:07,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a81894e-faa0-4391-ae31-5501de5b18e3/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-21 13:46:07,889 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-21 13:46:07,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:46:07,890 INFO L85 PathProgramCache]: Analyzing trace with hash -169701609, now seen corresponding path program 4 times [2022-11-21 13:46:07,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:46:07,890 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592837205] [2022-11-21 13:46:07,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:46:07,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:46:07,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:46:08,724 INFO L134 CoverageAnalysis]: Checked inductivity of 1661 backedges. 0 proven. 1661 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:46:08,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:46:08,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592837205] [2022-11-21 13:46:08,724 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592837205] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 13:46:08,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [771849470] [2022-11-21 13:46:08,724 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-21 13:46:08,724 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:46:08,725 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a81894e-faa0-4391-ae31-5501de5b18e3/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 13:46:08,726 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a81894e-faa0-4391-ae31-5501de5b18e3/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 13:46:08,747 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a81894e-faa0-4391-ae31-5501de5b18e3/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-21 13:46:08,843 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-21 13:46:08,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 13:46:08,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-21 13:46:08,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 13:46:09,136 INFO L134 CoverageAnalysis]: Checked inductivity of 1661 backedges. 0 proven. 1661 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:46:09,136 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 13:46:10,134 INFO L134 CoverageAnalysis]: Checked inductivity of 1661 backedges. 0 proven. 1661 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:46:10,135 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [771849470] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 13:46:10,135 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 13:46:10,135 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 48 [2022-11-21 13:46:10,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353529179] [2022-11-21 13:46:10,135 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 13:46:10,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-11-21 13:46:10,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:46:10,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-11-21 13:46:10,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2022-11-21 13:46:10,142 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 104 [2022-11-21 13:46:10,144 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 364 transitions, 3601 flow. Second operand has 49 states, 49 states have (on average 88.08163265306122) internal successors, (4316), 49 states have internal predecessors, (4316), 0 states have call successors, (0), 0 states 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 13:46:10,144 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 13:46:10,145 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 104 [2022-11-21 13:46:10,145 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand