./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/weaver/chl-chromosome-symm.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_489dc93a-ade0-402b-95de-4a8ffbc67c5e/bin/uautomizer-vX5HgA9Q3a/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_489dc93a-ade0-402b-95de-4a8ffbc67c5e/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_489dc93a-ade0-402b-95de-4a8ffbc67c5e/bin/uautomizer-vX5HgA9Q3a/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_489dc93a-ade0-402b-95de-4a8ffbc67c5e/bin/uautomizer-vX5HgA9Q3a/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/chl-chromosome-symm.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_489dc93a-ade0-402b-95de-4a8ffbc67c5e/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_489dc93a-ade0-402b-95de-4a8ffbc67c5e/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 c7fdb1595c27c144c3bf111946260cb3946663200a2d53f7fba5455031291c4f --- 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 13:50:51,858 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-21 13:50:51,861 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-21 13:50:51,904 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-21 13:50:51,909 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-21 13:50:51,911 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-21 13:50:51,914 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-21 13:50:51,919 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-21 13:50:51,924 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-21 13:50:51,927 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-21 13:50:51,930 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-21 13:50:51,932 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-21 13:50:51,933 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-21 13:50:51,934 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-21 13:50:51,936 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-21 13:50:51,937 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-21 13:50:51,939 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-21 13:50:51,940 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-21 13:50:51,942 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-21 13:50:51,944 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-21 13:50:51,946 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-21 13:50:51,949 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-21 13:50:51,952 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-21 13:50:51,954 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-21 13:50:51,958 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-21 13:50:51,967 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-21 13:50:51,968 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-21 13:50:51,969 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-21 13:50:51,971 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-21 13:50:51,973 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-21 13:50:51,975 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-21 13:50:51,976 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-21 13:50:51,978 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-21 13:50:51,979 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-21 13:50:51,982 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-21 13:50:51,983 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-21 13:50:51,985 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-21 13:50:51,986 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-21 13:50:51,986 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-21 13:50:51,990 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-21 13:50:51,991 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-21 13:50:51,992 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_489dc93a-ade0-402b-95de-4a8ffbc67c5e/bin/uautomizer-vX5HgA9Q3a/config/svcomp-Overflow-32bit-Automizer_Default.epf [2022-11-21 13:50:52,043 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-21 13:50:52,045 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-21 13:50:52,045 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-21 13:50:52,046 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-21 13:50:52,047 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-21 13:50:52,047 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-21 13:50:52,048 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-21 13:50:52,048 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-21 13:50:52,049 INFO L138 SettingsManager]: * Use SBE=true [2022-11-21 13:50:52,049 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-21 13:50:52,050 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-21 13:50:52,051 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-21 13:50:52,051 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-21 13:50:52,051 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-21 13:50:52,052 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-21 13:50:52,052 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-21 13:50:52,052 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-21 13:50:52,053 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-21 13:50:52,053 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2022-11-21 13:50:52,053 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-21 13:50:52,054 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-21 13:50:52,054 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-21 13:50:52,054 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-21 13:50:52,055 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-21 13:50:52,055 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-21 13:50:52,055 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-21 13:50:52,055 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-21 13:50:52,056 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-21 13:50:52,057 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-21 13:50:52,057 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-21 13:50:52,057 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-21 13:50:52,058 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-21 13:50:52,058 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-21 13:50:52,059 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-21 13:50:52,059 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-21 13:50:52,059 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_489dc93a-ade0-402b-95de-4a8ffbc67c5e/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_489dc93a-ade0-402b-95de-4a8ffbc67c5e/bin/uautomizer-vX5HgA9Q3a Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c7fdb1595c27c144c3bf111946260cb3946663200a2d53f7fba5455031291c4f [2022-11-21 13:50:52,377 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-21 13:50:52,417 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-21 13:50:52,420 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-21 13:50:52,422 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-21 13:50:52,422 INFO L275 PluginConnector]: CDTParser initialized [2022-11-21 13:50:52,424 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_489dc93a-ade0-402b-95de-4a8ffbc67c5e/bin/uautomizer-vX5HgA9Q3a/../../sv-benchmarks/c/weaver/chl-chromosome-symm.wvr.c [2022-11-21 13:50:56,243 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-21 13:50:56,566 INFO L351 CDTParser]: Found 1 translation units. [2022-11-21 13:50:56,567 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_489dc93a-ade0-402b-95de-4a8ffbc67c5e/sv-benchmarks/c/weaver/chl-chromosome-symm.wvr.c [2022-11-21 13:50:56,579 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_489dc93a-ade0-402b-95de-4a8ffbc67c5e/bin/uautomizer-vX5HgA9Q3a/data/bd27c5416/1be92ce59b4b400c9092ae13abf85c7a/FLAG05bd6c7de [2022-11-21 13:50:56,604 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_489dc93a-ade0-402b-95de-4a8ffbc67c5e/bin/uautomizer-vX5HgA9Q3a/data/bd27c5416/1be92ce59b4b400c9092ae13abf85c7a [2022-11-21 13:50:56,609 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-21 13:50:56,612 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-21 13:50:56,615 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-21 13:50:56,615 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-21 13:50:56,620 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-21 13:50:56,621 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:50:56" (1/1) ... [2022-11-21 13:50:56,623 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4b34d3f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:50:56, skipping insertion in model container [2022-11-21 13:50:56,623 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:50:56" (1/1) ... [2022-11-21 13:50:56,633 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-21 13:50:56,671 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-21 13:50:56,910 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_489dc93a-ade0-402b-95de-4a8ffbc67c5e/sv-benchmarks/c/weaver/chl-chromosome-symm.wvr.c[2695,2708] [2022-11-21 13:50:56,919 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-21 13:50:56,932 INFO L203 MainTranslator]: Completed pre-run [2022-11-21 13:50:56,958 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_489dc93a-ade0-402b-95de-4a8ffbc67c5e/sv-benchmarks/c/weaver/chl-chromosome-symm.wvr.c[2695,2708] [2022-11-21 13:50:56,965 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-21 13:50:56,983 INFO L208 MainTranslator]: Completed translation [2022-11-21 13:50:56,984 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:50:56 WrapperNode [2022-11-21 13:50:56,984 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-21 13:50:56,986 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-21 13:50:56,986 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-21 13:50:56,986 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-21 13:50:56,996 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:50:56" (1/1) ... [2022-11-21 13:50:57,024 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:50:56" (1/1) ... [2022-11-21 13:50:57,060 INFO L138 Inliner]: procedures = 25, calls = 37, calls flagged for inlining = 15, calls inlined = 19, statements flattened = 230 [2022-11-21 13:50:57,060 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-21 13:50:57,061 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-21 13:50:57,061 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-21 13:50:57,061 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-21 13:50:57,073 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:50:56" (1/1) ... [2022-11-21 13:50:57,074 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:50:56" (1/1) ... [2022-11-21 13:50:57,078 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:50:56" (1/1) ... [2022-11-21 13:50:57,079 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:50:56" (1/1) ... [2022-11-21 13:50:57,091 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:50:56" (1/1) ... [2022-11-21 13:50:57,097 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:50:56" (1/1) ... [2022-11-21 13:50:57,099 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:50:56" (1/1) ... [2022-11-21 13:50:57,101 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:50:56" (1/1) ... [2022-11-21 13:50:57,105 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-21 13:50:57,106 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-21 13:50:57,107 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-21 13:50:57,107 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-21 13:50:57,108 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:50:56" (1/1) ... [2022-11-21 13:50:57,116 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-21 13:50:57,131 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_489dc93a-ade0-402b-95de-4a8ffbc67c5e/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 13:50:57,145 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_489dc93a-ade0-402b-95de-4a8ffbc67c5e/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-21 13:50:57,161 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_489dc93a-ade0-402b-95de-4a8ffbc67c5e/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-21 13:50:57,201 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-21 13:50:57,202 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-21 13:50:57,202 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-21 13:50:57,204 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-21 13:50:57,204 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-21 13:50:57,207 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-21 13:50:57,208 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-21 13:50:57,208 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-21 13:50:57,213 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-21 13:50:57,214 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-21 13:50:57,214 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-21 13:50:57,214 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-21 13:50:57,214 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-21 13:50:57,216 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 13:50:57,365 INFO L235 CfgBuilder]: Building ICFG [2022-11-21 13:50:57,368 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-21 13:50:58,094 INFO L276 CfgBuilder]: Performing block encoding [2022-11-21 13:50:58,109 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-21 13:50:58,109 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-11-21 13:50:58,113 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:50:58 BoogieIcfgContainer [2022-11-21 13:50:58,113 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-21 13:50:58,116 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-21 13:50:58,117 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-21 13:50:58,121 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-21 13:50:58,121 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 01:50:56" (1/3) ... [2022-11-21 13:50:58,123 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60bed35c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:50:58, skipping insertion in model container [2022-11-21 13:50:58,123 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:50:56" (2/3) ... [2022-11-21 13:50:58,124 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60bed35c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:50:58, skipping insertion in model container [2022-11-21 13:50:58,124 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:50:58" (3/3) ... [2022-11-21 13:50:58,126 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-chromosome-symm.wvr.c [2022-11-21 13:50:58,137 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-21 13:50:58,151 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-21 13:50:58,151 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 20 error locations. [2022-11-21 13:50:58,152 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-21 13:50:58,405 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-21 13:50:58,518 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 303 places, 321 transitions, 658 flow [2022-11-21 13:50:58,666 INFO L130 PetriNetUnfolder]: 25/319 cut-off events. [2022-11-21 13:50:58,667 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-21 13:50:58,677 INFO L83 FinitePrefix]: Finished finitePrefix Result has 328 conditions, 319 events. 25/319 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 538 event pairs, 0 based on Foata normal form. 0/274 useless extension candidates. Maximal degree in co-relation 200. Up to 2 conditions per place. [2022-11-21 13:50:58,678 INFO L82 GeneralOperation]: Start removeDead. Operand has 303 places, 321 transitions, 658 flow [2022-11-21 13:50:58,687 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 269 places, 284 transitions, 577 flow [2022-11-21 13:50:58,700 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-21 13:50:58,708 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;@20ceb008, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-21 13:50:58,708 INFO L358 AbstractCegarLoop]: Starting to check reachability of 38 error locations. [2022-11-21 13:50:58,723 INFO L130 PetriNetUnfolder]: 3/56 cut-off events. [2022-11-21 13:50:58,724 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-21 13:50:58,724 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 13:50:58,725 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 13:50:58,726 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 35 more)] === [2022-11-21 13:50:58,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:50:58,733 INFO L85 PathProgramCache]: Analyzing trace with hash -309025070, now seen corresponding path program 1 times [2022-11-21 13:50:58,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:50:58,746 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332570896] [2022-11-21 13:50:58,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:50:58,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:50:58,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:50:59,189 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 13:50:59,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:50:59,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332570896] [2022-11-21 13:50:59,191 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1332570896] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 13:50:59,192 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 13:50:59,192 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 13:50:59,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995120867] [2022-11-21 13:50:59,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 13:50:59,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-21 13:50:59,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:50:59,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-21 13:50:59,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-21 13:50:59,251 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 275 out of 321 [2022-11-21 13:50:59,258 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 269 places, 284 transitions, 577 flow. Second operand has 4 states, 4 states have (on average 276.5) internal successors, (1106), 4 states have internal predecessors, (1106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:50:59,258 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 13:50:59,259 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 275 of 321 [2022-11-21 13:50:59,260 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 13:50:59,563 INFO L130 PetriNetUnfolder]: 15/474 cut-off events. [2022-11-21 13:50:59,563 INFO L131 PetriNetUnfolder]: For 10/12 co-relation queries the response was YES. [2022-11-21 13:50:59,572 INFO L83 FinitePrefix]: Finished finitePrefix Result has 535 conditions, 474 events. 15/474 cut-off events. For 10/12 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 1443 event pairs, 0 based on Foata normal form. 26/432 useless extension candidates. Maximal degree in co-relation 357. Up to 29 conditions per place. [2022-11-21 13:50:59,577 INFO L137 encePairwiseOnDemand]: 294/321 looper letters, 38 selfloop transitions, 9 changer transitions 4/290 dead transitions. [2022-11-21 13:50:59,577 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 290 transitions, 692 flow [2022-11-21 13:50:59,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-21 13:50:59,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-21 13:50:59,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1450 transitions. [2022-11-21 13:50:59,606 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9034267912772586 [2022-11-21 13:50:59,607 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1450 transitions. [2022-11-21 13:50:59,608 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1450 transitions. [2022-11-21 13:50:59,614 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 13:50:59,617 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1450 transitions. [2022-11-21 13:50:59,656 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 290.0) internal successors, (1450), 5 states have internal predecessors, (1450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:50:59,673 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 321.0) internal successors, (1926), 6 states have internal predecessors, (1926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:50:59,674 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 321.0) internal successors, (1926), 6 states have internal predecessors, (1926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:50:59,677 INFO L175 Difference]: Start difference. First operand has 269 places, 284 transitions, 577 flow. Second operand 5 states and 1450 transitions. [2022-11-21 13:50:59,678 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 290 transitions, 692 flow [2022-11-21 13:50:59,684 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 290 transitions, 682 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-11-21 13:50:59,691 INFO L231 Difference]: Finished difference. Result has 273 places, 273 transitions, 603 flow [2022-11-21 13:50:59,694 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=321, PETRI_DIFFERENCE_MINUEND_FLOW=544, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=270, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=261, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=603, PETRI_PLACES=273, PETRI_TRANSITIONS=273} [2022-11-21 13:50:59,699 INFO L288 CegarLoopForPetriNet]: 269 programPoint places, 4 predicate places. [2022-11-21 13:50:59,699 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 273 transitions, 603 flow [2022-11-21 13:50:59,700 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 276.5) internal successors, (1106), 4 states have internal predecessors, (1106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:50:59,701 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 13:50:59,701 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] [2022-11-21 13:50:59,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-21 13:50:59,702 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 35 more)] === [2022-11-21 13:50:59,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:50:59,703 INFO L85 PathProgramCache]: Analyzing trace with hash 630141069, now seen corresponding path program 1 times [2022-11-21 13:50:59,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:50:59,703 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769392399] [2022-11-21 13:50:59,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:50:59,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:50:59,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:51:00,022 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:51:00,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:51:00,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769392399] [2022-11-21 13:51:00,024 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [769392399] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 13:51:00,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [740417085] [2022-11-21 13:51:00,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:51:00,027 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:51:00,028 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_489dc93a-ade0-402b-95de-4a8ffbc67c5e/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 13:51:00,036 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_489dc93a-ade0-402b-95de-4a8ffbc67c5e/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 13:51:00,050 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_489dc93a-ade0-402b-95de-4a8ffbc67c5e/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-21 13:51:00,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:51:00,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-21 13:51:00,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 13:51:00,331 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:51:00,331 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 13:51:00,447 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:51:00,449 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [740417085] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 13:51:00,450 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 13:51:00,450 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2022-11-21 13:51:00,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923595059] [2022-11-21 13:51:00,451 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 13:51:00,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-21 13:51:00,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:51:00,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-21 13:51:00,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-11-21 13:51:00,464 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 275 out of 321 [2022-11-21 13:51:00,471 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 273 transitions, 603 flow. Second operand has 12 states, 12 states have (on average 277.6666666666667) internal successors, (3332), 12 states have internal predecessors, (3332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:51:00,471 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 13:51:00,471 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 275 of 321 [2022-11-21 13:51:00,472 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 13:51:01,273 INFO L130 PetriNetUnfolder]: 36/1086 cut-off events. [2022-11-21 13:51:01,274 INFO L131 PetriNetUnfolder]: For 32/37 co-relation queries the response was YES. [2022-11-21 13:51:01,281 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1270 conditions, 1086 events. 36/1086 cut-off events. For 32/37 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 5642 event pairs, 0 based on Foata normal form. 6/942 useless extension candidates. Maximal degree in co-relation 820. Up to 22 conditions per place. [2022-11-21 13:51:01,288 INFO L137 encePairwiseOnDemand]: 306/321 looper letters, 71 selfloop transitions, 40 changer transitions 0/350 dead transitions. [2022-11-21 13:51:01,288 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 350 transitions, 1045 flow [2022-11-21 13:51:01,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-21 13:51:01,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-11-21 13:51:01,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 5067 transitions. [2022-11-21 13:51:01,303 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8769470404984424 [2022-11-21 13:51:01,304 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 5067 transitions. [2022-11-21 13:51:01,304 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 5067 transitions. [2022-11-21 13:51:01,307 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 13:51:01,308 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 5067 transitions. [2022-11-21 13:51:01,321 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 281.5) internal successors, (5067), 18 states have internal predecessors, (5067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:51:01,333 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 321.0) internal successors, (6099), 19 states have internal predecessors, (6099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:51:01,338 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 321.0) internal successors, (6099), 19 states have internal predecessors, (6099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:51:01,339 INFO L175 Difference]: Start difference. First operand has 273 places, 273 transitions, 603 flow. Second operand 18 states and 5067 transitions. [2022-11-21 13:51:01,339 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 350 transitions, 1045 flow [2022-11-21 13:51:01,343 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 285 places, 350 transitions, 1040 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-21 13:51:01,348 INFO L231 Difference]: Finished difference. Result has 289 places, 300 transitions, 836 flow [2022-11-21 13:51:01,349 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=321, PETRI_DIFFERENCE_MINUEND_FLOW=598, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=273, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=253, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=836, PETRI_PLACES=289, PETRI_TRANSITIONS=300} [2022-11-21 13:51:01,350 INFO L288 CegarLoopForPetriNet]: 269 programPoint places, 20 predicate places. [2022-11-21 13:51:01,350 INFO L495 AbstractCegarLoop]: Abstraction has has 289 places, 300 transitions, 836 flow [2022-11-21 13:51:01,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 277.6666666666667) internal successors, (3332), 12 states have internal predecessors, (3332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:51:01,352 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 13:51:01,353 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] [2022-11-21 13:51:01,364 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_489dc93a-ade0-402b-95de-4a8ffbc67c5e/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-21 13:51:01,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_489dc93a-ade0-402b-95de-4a8ffbc67c5e/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2022-11-21 13:51:01,560 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 35 more)] === [2022-11-21 13:51:01,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:51:01,561 INFO L85 PathProgramCache]: Analyzing trace with hash -1940462778, now seen corresponding path program 1 times [2022-11-21 13:51:01,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:51:01,562 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445387528] [2022-11-21 13:51:01,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:51:01,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:51:01,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:51:01,796 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:51:01,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:51:01,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445387528] [2022-11-21 13:51:01,797 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [445387528] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 13:51:01,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2145554997] [2022-11-21 13:51:01,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:51:01,798 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:51:01,798 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_489dc93a-ade0-402b-95de-4a8ffbc67c5e/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 13:51:01,800 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_489dc93a-ade0-402b-95de-4a8ffbc67c5e/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 13:51:01,817 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_489dc93a-ade0-402b-95de-4a8ffbc67c5e/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-21 13:51:01,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:51:01,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-21 13:51:01,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 13:51:02,026 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:51:02,026 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-21 13:51:02,027 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2145554997] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 13:51:02,027 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-21 13:51:02,028 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2022-11-21 13:51:02,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435724879] [2022-11-21 13:51:02,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 13:51:02,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-21 13:51:02,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:51:02,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-21 13:51:02,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-21 13:51:02,041 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 275 out of 321 [2022-11-21 13:51:02,043 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 300 transitions, 836 flow. Second operand has 6 states, 6 states have (on average 277.3333333333333) internal successors, (1664), 6 states have internal predecessors, (1664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:51:02,044 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 13:51:02,044 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 275 of 321 [2022-11-21 13:51:02,044 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 13:51:02,505 INFO L130 PetriNetUnfolder]: 36/1078 cut-off events. [2022-11-21 13:51:02,506 INFO L131 PetriNetUnfolder]: For 126/131 co-relation queries the response was YES. [2022-11-21 13:51:02,513 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1307 conditions, 1078 events. 36/1078 cut-off events. For 126/131 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 5615 event pairs, 0 based on Foata normal form. 8/936 useless extension candidates. Maximal degree in co-relation 1013. Up to 44 conditions per place. [2022-11-21 13:51:02,519 INFO L137 encePairwiseOnDemand]: 310/321 looper letters, 39 selfloop transitions, 27 changer transitions 0/305 dead transitions. [2022-11-21 13:51:02,519 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 289 places, 305 transitions, 948 flow [2022-11-21 13:51:02,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-21 13:51:02,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-21 13:51:02,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1972 transitions. [2022-11-21 13:51:02,525 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8776145972407655 [2022-11-21 13:51:02,526 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1972 transitions. [2022-11-21 13:51:02,526 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1972 transitions. [2022-11-21 13:51:02,527 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 13:51:02,528 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1972 transitions. [2022-11-21 13:51:02,533 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 281.7142857142857) internal successors, (1972), 7 states have internal predecessors, (1972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:51:02,538 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 321.0) internal successors, (2568), 8 states have internal predecessors, (2568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:51:02,540 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 321.0) internal successors, (2568), 8 states have internal predecessors, (2568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:51:02,540 INFO L175 Difference]: Start difference. First operand has 289 places, 300 transitions, 836 flow. Second operand 7 states and 1972 transitions. [2022-11-21 13:51:02,540 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 289 places, 305 transitions, 948 flow [2022-11-21 13:51:02,546 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 305 transitions, 874 flow, removed 26 selfloop flow, removed 5 redundant places. [2022-11-21 13:51:02,551 INFO L231 Difference]: Finished difference. Result has 284 places, 292 transitions, 762 flow [2022-11-21 13:51:02,552 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=321, PETRI_DIFFERENCE_MINUEND_FLOW=708, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=292, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=265, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=762, PETRI_PLACES=284, PETRI_TRANSITIONS=292} [2022-11-21 13:51:02,553 INFO L288 CegarLoopForPetriNet]: 269 programPoint places, 15 predicate places. [2022-11-21 13:51:02,553 INFO L495 AbstractCegarLoop]: Abstraction has has 284 places, 292 transitions, 762 flow [2022-11-21 13:51:02,554 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 277.3333333333333) internal successors, (1664), 6 states have internal predecessors, (1664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:51:02,554 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 13:51:02,555 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:51:02,567 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_489dc93a-ade0-402b-95de-4a8ffbc67c5e/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-21 13:51:02,761 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_489dc93a-ade0-402b-95de-4a8ffbc67c5e/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:51:02,761 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 35 more)] === [2022-11-21 13:51:02,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:51:02,762 INFO L85 PathProgramCache]: Analyzing trace with hash -1096002670, now seen corresponding path program 2 times [2022-11-21 13:51:02,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:51:02,763 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290353983] [2022-11-21 13:51:02,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:51:02,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:51:02,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:51:03,167 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:51:03,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:51:03,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290353983] [2022-11-21 13:51:03,168 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290353983] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 13:51:03,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [216150452] [2022-11-21 13:51:03,169 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-21 13:51:03,169 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:51:03,169 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_489dc93a-ade0-402b-95de-4a8ffbc67c5e/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 13:51:03,171 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_489dc93a-ade0-402b-95de-4a8ffbc67c5e/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 13:51:03,181 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_489dc93a-ade0-402b-95de-4a8ffbc67c5e/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-21 13:51:03,286 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-21 13:51:03,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 13:51:03,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-21 13:51:03,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 13:51:03,448 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-11-21 13:51:03,448 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 13:51:03,666 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-11-21 13:51:03,666 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [216150452] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 13:51:03,667 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 13:51:03,667 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 5, 5] total 17 [2022-11-21 13:51:03,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565859991] [2022-11-21 13:51:03,667 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 13:51:03,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-21 13:51:03,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:51:03,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-21 13:51:03,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2022-11-21 13:51:03,680 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 265 out of 321 [2022-11-21 13:51:03,686 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 292 transitions, 762 flow. Second operand has 18 states, 18 states have (on average 269.0) internal successors, (4842), 18 states have internal predecessors, (4842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:51:03,686 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 13:51:03,687 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 265 of 321 [2022-11-21 13:51:03,687 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 13:51:04,667 INFO L130 PetriNetUnfolder]: 43/1266 cut-off events. [2022-11-21 13:51:04,667 INFO L131 PetriNetUnfolder]: For 114/120 co-relation queries the response was YES. [2022-11-21 13:51:04,677 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1508 conditions, 1266 events. 43/1266 cut-off events. For 114/120 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 7003 event pairs, 0 based on Foata normal form. 2/1088 useless extension candidates. Maximal degree in co-relation 1020. Up to 14 conditions per place. [2022-11-21 13:51:04,685 INFO L137 encePairwiseOnDemand]: 305/321 looper letters, 83 selfloop transitions, 43 changer transitions 0/355 dead transitions. [2022-11-21 13:51:04,685 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 301 places, 355 transitions, 1170 flow [2022-11-21 13:51:04,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-21 13:51:04,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2022-11-21 13:51:04,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 5428 transitions. [2022-11-21 13:51:04,699 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8454828660436137 [2022-11-21 13:51:04,699 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 5428 transitions. [2022-11-21 13:51:04,699 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 5428 transitions. [2022-11-21 13:51:04,704 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 13:51:04,704 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 5428 transitions. [2022-11-21 13:51:04,718 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 271.4) internal successors, (5428), 20 states have internal predecessors, (5428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:51:04,733 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 321.0) internal successors, (6741), 21 states have internal predecessors, (6741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:51:04,736 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 321.0) internal successors, (6741), 21 states have internal predecessors, (6741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:51:04,737 INFO L175 Difference]: Start difference. First operand has 284 places, 292 transitions, 762 flow. Second operand 20 states and 5428 transitions. [2022-11-21 13:51:04,737 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 301 places, 355 transitions, 1170 flow [2022-11-21 13:51:04,741 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 355 transitions, 1117 flow, removed 0 selfloop flow, removed 9 redundant places. [2022-11-21 13:51:04,747 INFO L231 Difference]: Finished difference. Result has 293 places, 295 transitions, 808 flow [2022-11-21 13:51:04,748 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=321, PETRI_DIFFERENCE_MINUEND_FLOW=692, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=290, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=250, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=808, PETRI_PLACES=293, PETRI_TRANSITIONS=295} [2022-11-21 13:51:04,749 INFO L288 CegarLoopForPetriNet]: 269 programPoint places, 24 predicate places. [2022-11-21 13:51:04,749 INFO L495 AbstractCegarLoop]: Abstraction has has 293 places, 295 transitions, 808 flow [2022-11-21 13:51:04,755 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 269.0) internal successors, (4842), 18 states have internal predecessors, (4842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:51:04,755 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 13:51:04,755 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:51:04,766 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_489dc93a-ade0-402b-95de-4a8ffbc67c5e/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-21 13:51:04,956 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_489dc93a-ade0-402b-95de-4a8ffbc67c5e/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:51:04,956 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 35 more)] === [2022-11-21 13:51:04,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:51:04,957 INFO L85 PathProgramCache]: Analyzing trace with hash -1201390210, now seen corresponding path program 1 times [2022-11-21 13:51:04,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:51:04,957 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088253874] [2022-11-21 13:51:04,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:51:04,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:51:04,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:51:05,165 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 13:51:05,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:51:05,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088253874] [2022-11-21 13:51:05,166 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1088253874] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 13:51:05,166 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 13:51:05,167 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-21 13:51:05,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366317379] [2022-11-21 13:51:05,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 13:51:05,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-21 13:51:05,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:51:05,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-21 13:51:05,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-21 13:51:05,171 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 275 out of 321 [2022-11-21 13:51:05,182 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 293 places, 295 transitions, 808 flow. Second operand has 5 states, 5 states have (on average 278.4) internal successors, (1392), 5 states have internal predecessors, (1392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:51:05,183 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 13:51:05,183 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 275 of 321 [2022-11-21 13:51:05,183 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 13:51:05,523 INFO L130 PetriNetUnfolder]: 36/1080 cut-off events. [2022-11-21 13:51:05,523 INFO L131 PetriNetUnfolder]: For 148/153 co-relation queries the response was YES. [2022-11-21 13:51:05,531 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1305 conditions, 1080 events. 36/1080 cut-off events. For 148/153 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 5430 event pairs, 0 based on Foata normal form. 2/942 useless extension candidates. Maximal degree in co-relation 203. Up to 74 conditions per place. [2022-11-21 13:51:05,537 INFO L137 encePairwiseOnDemand]: 311/321 looper letters, 41 selfloop transitions, 12 changer transitions 0/298 dead transitions. [2022-11-21 13:51:05,537 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 298 transitions, 919 flow [2022-11-21 13:51:05,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-21 13:51:05,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-21 13:51:05,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1412 transitions. [2022-11-21 13:51:05,542 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8797507788161993 [2022-11-21 13:51:05,542 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1412 transitions. [2022-11-21 13:51:05,542 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1412 transitions. [2022-11-21 13:51:05,544 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 13:51:05,544 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1412 transitions. [2022-11-21 13:51:05,548 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 282.4) internal successors, (1412), 5 states have internal predecessors, (1412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:51:05,552 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 321.0) internal successors, (1926), 6 states have internal predecessors, (1926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:51:05,553 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 321.0) internal successors, (1926), 6 states have internal predecessors, (1926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:51:05,554 INFO L175 Difference]: Start difference. First operand has 293 places, 295 transitions, 808 flow. Second operand 5 states and 1412 transitions. [2022-11-21 13:51:05,554 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 298 transitions, 919 flow [2022-11-21 13:51:05,558 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 298 transitions, 828 flow, removed 4 selfloop flow, removed 15 redundant places. [2022-11-21 13:51:05,571 INFO L231 Difference]: Finished difference. Result has 283 places, 294 transitions, 742 flow [2022-11-21 13:51:05,572 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=321, PETRI_DIFFERENCE_MINUEND_FLOW=710, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=294, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=282, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=742, PETRI_PLACES=283, PETRI_TRANSITIONS=294} [2022-11-21 13:51:05,575 INFO L288 CegarLoopForPetriNet]: 269 programPoint places, 14 predicate places. [2022-11-21 13:51:05,575 INFO L495 AbstractCegarLoop]: Abstraction has has 283 places, 294 transitions, 742 flow [2022-11-21 13:51:05,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 278.4) internal successors, (1392), 5 states have internal predecessors, (1392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:51:05,576 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 13:51:05,576 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:51:05,577 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-21 13:51:05,577 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 35 more)] === [2022-11-21 13:51:05,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:51:05,577 INFO L85 PathProgramCache]: Analyzing trace with hash 262610193, now seen corresponding path program 1 times [2022-11-21 13:51:05,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:51:05,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016553502] [2022-11-21 13:51:05,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:51:05,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:51:05,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:51:05,825 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 13:51:05,826 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:51:05,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016553502] [2022-11-21 13:51:05,826 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016553502] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 13:51:05,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [866661154] [2022-11-21 13:51:05,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:51:05,827 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:51:05,827 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_489dc93a-ade0-402b-95de-4a8ffbc67c5e/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 13:51:05,828 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_489dc93a-ade0-402b-95de-4a8ffbc67c5e/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 13:51:05,857 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_489dc93a-ade0-402b-95de-4a8ffbc67c5e/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-21 13:51:05,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:51:05,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-21 13:51:06,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 13:51:06,160 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 13:51:06,161 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 13:51:06,284 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 13:51:06,285 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [866661154] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 13:51:06,287 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 13:51:06,287 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2022-11-21 13:51:06,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839524636] [2022-11-21 13:51:06,288 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 13:51:06,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-21 13:51:06,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:51:06,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-21 13:51:06,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2022-11-21 13:51:06,296 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 265 out of 321 [2022-11-21 13:51:06,301 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 294 transitions, 742 flow. Second operand has 15 states, 15 states have (on average 268.6666666666667) internal successors, (4030), 15 states have internal predecessors, (4030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:51:06,301 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 13:51:06,301 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 265 of 321 [2022-11-21 13:51:06,302 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 13:51:06,756 INFO L130 PetriNetUnfolder]: 22/708 cut-off events. [2022-11-21 13:51:06,756 INFO L131 PetriNetUnfolder]: For 44/47 co-relation queries the response was YES. [2022-11-21 13:51:06,761 INFO L83 FinitePrefix]: Finished finitePrefix Result has 916 conditions, 708 events. 22/708 cut-off events. For 44/47 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 2634 event pairs, 0 based on Foata normal form. 4/628 useless extension candidates. Maximal degree in co-relation 648. Up to 38 conditions per place. [2022-11-21 13:51:06,765 INFO L137 encePairwiseOnDemand]: 305/321 looper letters, 51 selfloop transitions, 30 changer transitions 0/310 dead transitions. [2022-11-21 13:51:06,766 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 310 transitions, 946 flow [2022-11-21 13:51:06,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-21 13:51:06,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-11-21 13:51:06,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2982 transitions. [2022-11-21 13:51:06,774 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8445199660152931 [2022-11-21 13:51:06,775 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2982 transitions. [2022-11-21 13:51:06,775 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2982 transitions. [2022-11-21 13:51:06,777 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 13:51:06,777 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2982 transitions. [2022-11-21 13:51:06,784 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 271.09090909090907) internal successors, (2982), 11 states have internal predecessors, (2982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:51:06,792 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 321.0) internal successors, (3852), 12 states have internal predecessors, (3852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:51:06,794 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 321.0) internal successors, (3852), 12 states have internal predecessors, (3852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:51:06,794 INFO L175 Difference]: Start difference. First operand has 283 places, 294 transitions, 742 flow. Second operand 11 states and 2982 transitions. [2022-11-21 13:51:06,794 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 310 transitions, 946 flow [2022-11-21 13:51:06,798 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 310 transitions, 926 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-11-21 13:51:06,803 INFO L231 Difference]: Finished difference. Result has 292 places, 294 transitions, 821 flow [2022-11-21 13:51:06,804 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=321, PETRI_DIFFERENCE_MINUEND_FLOW=708, PETRI_DIFFERENCE_MINUEND_PLACES=279, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=292, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=262, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=821, PETRI_PLACES=292, PETRI_TRANSITIONS=294} [2022-11-21 13:51:06,808 INFO L288 CegarLoopForPetriNet]: 269 programPoint places, 23 predicate places. [2022-11-21 13:51:06,809 INFO L495 AbstractCegarLoop]: Abstraction has has 292 places, 294 transitions, 821 flow [2022-11-21 13:51:06,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 268.6666666666667) internal successors, (4030), 15 states have internal predecessors, (4030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:51:06,811 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 13:51:06,811 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:51:06,831 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_489dc93a-ade0-402b-95de-4a8ffbc67c5e/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-21 13:51:07,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_489dc93a-ade0-402b-95de-4a8ffbc67c5e/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:51:07,018 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 35 more)] === [2022-11-21 13:51:07,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:51:07,019 INFO L85 PathProgramCache]: Analyzing trace with hash -1124451215, now seen corresponding path program 2 times [2022-11-21 13:51:07,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:51:07,019 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631831462] [2022-11-21 13:51:07,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:51:07,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:51:07,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:51:07,424 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-21 13:51:07,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:51:07,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631831462] [2022-11-21 13:51:07,425 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [631831462] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 13:51:07,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1245430207] [2022-11-21 13:51:07,425 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-21 13:51:07,426 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:51:07,426 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_489dc93a-ade0-402b-95de-4a8ffbc67c5e/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 13:51:07,427 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_489dc93a-ade0-402b-95de-4a8ffbc67c5e/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 13:51:07,436 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_489dc93a-ade0-402b-95de-4a8ffbc67c5e/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-21 13:51:07,606 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-21 13:51:07,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 13:51:07,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-21 13:51:07,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 13:51:07,943 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-21 13:51:07,943 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 13:51:08,183 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-21 13:51:08,183 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1245430207] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 13:51:08,184 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 13:51:08,184 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 22 [2022-11-21 13:51:08,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763701435] [2022-11-21 13:51:08,184 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 13:51:08,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-21 13:51:08,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:51:08,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-21 13:51:08,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2022-11-21 13:51:08,193 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 265 out of 321 [2022-11-21 13:51:08,199 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 294 transitions, 821 flow. Second operand has 22 states, 22 states have (on average 268.77272727272725) internal successors, (5913), 22 states have internal predecessors, (5913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:51:08,200 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 13:51:08,200 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 265 of 321 [2022-11-21 13:51:08,200 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 13:51:08,835 INFO L130 PetriNetUnfolder]: 8/336 cut-off events. [2022-11-21 13:51:08,836 INFO L131 PetriNetUnfolder]: For 102/103 co-relation queries the response was YES. [2022-11-21 13:51:08,837 INFO L83 FinitePrefix]: Finished finitePrefix Result has 569 conditions, 336 events. 8/336 cut-off events. For 102/103 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 336 event pairs, 0 based on Foata normal form. 4/312 useless extension candidates. Maximal degree in co-relation 192. Up to 18 conditions per place. [2022-11-21 13:51:08,840 INFO L137 encePairwiseOnDemand]: 305/321 looper letters, 57 selfloop transitions, 34 changer transitions 0/320 dead transitions. [2022-11-21 13:51:08,840 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 308 places, 320 transitions, 1085 flow [2022-11-21 13:51:08,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-21 13:51:08,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2022-11-21 13:51:08,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 4600 transitions. [2022-11-21 13:51:08,855 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8429540040315191 [2022-11-21 13:51:08,855 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 4600 transitions. [2022-11-21 13:51:08,855 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 4600 transitions. [2022-11-21 13:51:08,859 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 13:51:08,859 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 4600 transitions. [2022-11-21 13:51:08,870 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 270.5882352941176) internal successors, (4600), 17 states have internal predecessors, (4600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:51:08,883 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 321.0) internal successors, (5778), 18 states have internal predecessors, (5778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:51:08,885 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 321.0) internal successors, (5778), 18 states have internal predecessors, (5778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:51:08,886 INFO L175 Difference]: Start difference. First operand has 292 places, 294 transitions, 821 flow. Second operand 17 states and 4600 transitions. [2022-11-21 13:51:08,886 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 308 places, 320 transitions, 1085 flow [2022-11-21 13:51:08,890 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 320 transitions, 1030 flow, removed 6 selfloop flow, removed 9 redundant places. [2022-11-21 13:51:08,896 INFO L231 Difference]: Finished difference. Result has 301 places, 292 transitions, 848 flow [2022-11-21 13:51:08,897 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=321, PETRI_DIFFERENCE_MINUEND_FLOW=762, PETRI_DIFFERENCE_MINUEND_PLACES=283, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=292, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=258, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=848, PETRI_PLACES=301, PETRI_TRANSITIONS=292} [2022-11-21 13:51:08,898 INFO L288 CegarLoopForPetriNet]: 269 programPoint places, 32 predicate places. [2022-11-21 13:51:08,898 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 292 transitions, 848 flow [2022-11-21 13:51:08,900 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 268.77272727272725) internal successors, (5913), 22 states have internal predecessors, (5913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:51:08,901 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 13:51:08,901 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:51:08,914 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_489dc93a-ade0-402b-95de-4a8ffbc67c5e/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-21 13:51:09,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_489dc93a-ade0-402b-95de-4a8ffbc67c5e/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:51:09,116 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 35 more)] === [2022-11-21 13:51:09,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:51:09,117 INFO L85 PathProgramCache]: Analyzing trace with hash -1360620591, now seen corresponding path program 3 times [2022-11-21 13:51:09,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:51:09,117 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987948268] [2022-11-21 13:51:09,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:51:09,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:51:09,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:51:12,392 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 27 proven. 68 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2022-11-21 13:51:12,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:51:12,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987948268] [2022-11-21 13:51:12,393 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987948268] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 13:51:12,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [615321651] [2022-11-21 13:51:12,394 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-21 13:51:12,394 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:51:12,394 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_489dc93a-ade0-402b-95de-4a8ffbc67c5e/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 13:51:12,406 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_489dc93a-ade0-402b-95de-4a8ffbc67c5e/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 13:51:12,416 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_489dc93a-ade0-402b-95de-4a8ffbc67c5e/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-21 13:51:12,677 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-21 13:51:12,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 13:51:12,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 383 conjuncts, 51 conjunts are in the unsatisfiable core [2022-11-21 13:51:12,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 13:51:13,351 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-21 13:51:13,540 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-21 13:51:13,541 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 28 [2022-11-21 13:51:13,927 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-21 13:51:13,927 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 32 [2022-11-21 13:51:14,306 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-21 13:51:14,306 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 32 [2022-11-21 13:51:14,679 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-21 13:51:14,680 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 32 [2022-11-21 13:51:15,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 13:51:15,319 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-21 13:51:15,443 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-21 13:51:15,497 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 95 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2022-11-21 13:51:15,497 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 13:51:15,707 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_233 (Array Int Int))) (< (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_233) c_~o_2~0.base) c_~o_2~0.offset) 9223372039002259456)) is different from false [2022-11-21 13:51:15,899 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_233 (Array Int Int))) (< (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_233) |c_ULTIMATE.start_create_fresh_int_array_#res#1.base|) |c_ULTIMATE.start_create_fresh_int_array_#res#1.offset|) 9223372039002259456)) is different from false [2022-11-21 13:51:15,907 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_233 (Array Int Int))) (< (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_233) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|) 9223372039002259456)) is different from false [2022-11-21 13:51:41,216 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_225 Int) (|ULTIMATE.start_create_fresh_int_array_~i~2#1| Int) (v_ArrVal_231 Int) (v_ArrVal_230 Int) (v_ArrVal_228 Int) (|v_ULTIMATE.start_create_fresh_int_array_~i~2#1_40| Int) (v_ArrVal_233 (Array Int Int)) (|v_ULTIMATE.start_create_fresh_int_array_~i~2#1_41| Int) (|v_ULTIMATE.start_create_fresh_int_array_~i~2#1_42| Int)) (or (< (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base| (store (store (store (store (select |c_#memory_int| |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) (+ (* |ULTIMATE.start_create_fresh_int_array_~i~2#1| 4) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|) v_ArrVal_225) (+ (* |v_ULTIMATE.start_create_fresh_int_array_~i~2#1_42| 4) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|) v_ArrVal_228) (+ (* |v_ULTIMATE.start_create_fresh_int_array_~i~2#1_41| 4) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|) v_ArrVal_230) (+ (* |v_ULTIMATE.start_create_fresh_int_array_~i~2#1_40| 4) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|) v_ArrVal_231)) |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_233) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|) 9223372039002259456) (< (+ |v_ULTIMATE.start_create_fresh_int_array_~i~2#1_41| 1) |v_ULTIMATE.start_create_fresh_int_array_~i~2#1_40|) (< (+ |ULTIMATE.start_create_fresh_int_array_~i~2#1| 1) |v_ULTIMATE.start_create_fresh_int_array_~i~2#1_42|) (< (+ |v_ULTIMATE.start_create_fresh_int_array_~i~2#1_40| 1) |c_ULTIMATE.start_create_fresh_int_array_~size#1|) (< (+ |v_ULTIMATE.start_create_fresh_int_array_~i~2#1_42| 1) |v_ULTIMATE.start_create_fresh_int_array_~i~2#1_41|))) is different from false [2022-11-21 13:51:41,801 INFO L321 Elim1Store]: treesize reduction 280, result has 34.1 percent of original size [2022-11-21 13:51:41,802 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 5 case distinctions, treesize of input 50 treesize of output 155 [2022-11-21 13:51:41,908 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-21 13:51:41,908 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 154 treesize of output 230 [2022-11-21 13:51:42,279 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-21 13:51:42,963 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 95 trivial. 37 not checked. [2022-11-21 13:51:42,963 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [615321651] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 13:51:42,963 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 13:51:42,963 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 27, 30] total 73 [2022-11-21 13:51:42,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308813993] [2022-11-21 13:51:42,964 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 13:51:42,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2022-11-21 13:51:42,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:51:42,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2022-11-21 13:51:42,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=432, Invalid=4387, Unknown=27, NotChecked=556, Total=5402 [2022-11-21 13:51:42,980 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 206 out of 321 [2022-11-21 13:51:42,992 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 292 transitions, 848 flow. Second operand has 74 states, 74 states have (on average 209.47297297297297) internal successors, (15501), 74 states have internal predecessors, (15501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:51:42,993 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 13:51:42,993 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 206 of 321 [2022-11-21 13:51:42,993 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 13:51:51,302 INFO L130 PetriNetUnfolder]: 1076/5974 cut-off events. [2022-11-21 13:51:51,303 INFO L131 PetriNetUnfolder]: For 113/113 co-relation queries the response was YES. [2022-11-21 13:51:51,325 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8077 conditions, 5974 events. 1076/5974 cut-off events. For 113/113 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 58961 event pairs, 228 based on Foata normal form. 0/4880 useless extension candidates. Maximal degree in co-relation 7651. Up to 400 conditions per place. [2022-11-21 13:51:51,360 INFO L137 encePairwiseOnDemand]: 278/321 looper letters, 257 selfloop transitions, 83 changer transitions 0/512 dead transitions. [2022-11-21 13:51:51,360 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 340 places, 512 transitions, 2003 flow [2022-11-21 13:51:51,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-11-21 13:51:51,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2022-11-21 13:51:51,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 8572 transitions. [2022-11-21 13:51:51,377 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.667601246105919 [2022-11-21 13:51:51,378 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 8572 transitions. [2022-11-21 13:51:51,378 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 8572 transitions. [2022-11-21 13:51:51,381 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 13:51:51,382 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 8572 transitions. [2022-11-21 13:51:51,397 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 214.3) internal successors, (8572), 40 states have internal predecessors, (8572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:51:51,419 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 321.0) internal successors, (13161), 41 states have internal predecessors, (13161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:51:51,424 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 321.0) internal successors, (13161), 41 states have internal predecessors, (13161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:51:51,424 INFO L175 Difference]: Start difference. First operand has 301 places, 292 transitions, 848 flow. Second operand 40 states and 8572 transitions. [2022-11-21 13:51:51,424 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 340 places, 512 transitions, 2003 flow [2022-11-21 13:51:51,429 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 512 transitions, 1935 flow, removed 0 selfloop flow, removed 16 redundant places. [2022-11-21 13:51:51,437 INFO L231 Difference]: Finished difference. Result has 343 places, 330 transitions, 1161 flow [2022-11-21 13:51:51,438 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=321, PETRI_DIFFERENCE_MINUEND_FLOW=780, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=292, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=1161, PETRI_PLACES=343, PETRI_TRANSITIONS=330} [2022-11-21 13:51:51,440 INFO L288 CegarLoopForPetriNet]: 269 programPoint places, 74 predicate places. [2022-11-21 13:51:51,440 INFO L495 AbstractCegarLoop]: Abstraction has has 343 places, 330 transitions, 1161 flow [2022-11-21 13:51:51,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 209.47297297297297) internal successors, (15501), 74 states have internal predecessors, (15501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:51:51,445 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 13:51:51,445 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:51:51,535 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_489dc93a-ade0-402b-95de-4a8ffbc67c5e/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-21 13:51:51,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_489dc93a-ade0-402b-95de-4a8ffbc67c5e/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:51:51,726 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 35 more)] === [2022-11-21 13:51:51,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:51:51,726 INFO L85 PathProgramCache]: Analyzing trace with hash 770435450, now seen corresponding path program 1 times [2022-11-21 13:51:51,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:51:51,727 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701734685] [2022-11-21 13:51:51,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:51:51,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:51:51,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:51:51,911 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2022-11-21 13:51:51,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:51:51,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701734685] [2022-11-21 13:51:51,912 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701734685] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 13:51:51,912 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 13:51:51,912 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 13:51:51,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114054664] [2022-11-21 13:51:51,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 13:51:51,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-21 13:51:51,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:51:51,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-21 13:51:51,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-21 13:51:51,916 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 276 out of 321 [2022-11-21 13:51:51,917 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 343 places, 330 transitions, 1161 flow. Second operand has 4 states, 4 states have (on average 277.75) internal successors, (1111), 4 states have internal predecessors, (1111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:51:51,918 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 13:51:51,918 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 276 of 321 [2022-11-21 13:51:51,918 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 13:51:52,464 INFO L130 PetriNetUnfolder]: 118/1566 cut-off events. [2022-11-21 13:51:52,468 INFO L131 PetriNetUnfolder]: For 345/346 co-relation queries the response was YES. [2022-11-21 13:51:52,475 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2437 conditions, 1566 events. 118/1566 cut-off events. For 345/346 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 9520 event pairs, 30 based on Foata normal form. 12/1362 useless extension candidates. Maximal degree in co-relation 2088. Up to 141 conditions per place. [2022-11-21 13:51:52,484 INFO L137 encePairwiseOnDemand]: 314/321 looper letters, 42 selfloop transitions, 8 changer transitions 0/339 dead transitions. [2022-11-21 13:51:52,484 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 345 places, 339 transitions, 1272 flow [2022-11-21 13:51:52,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-21 13:51:52,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-21 13:51:52,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1144 transitions. [2022-11-21 13:51:52,487 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8909657320872274 [2022-11-21 13:51:52,487 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1144 transitions. [2022-11-21 13:51:52,487 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1144 transitions. [2022-11-21 13:51:52,487 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 13:51:52,488 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1144 transitions. [2022-11-21 13:51:52,489 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 286.0) internal successors, (1144), 4 states have internal predecessors, (1144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:51:52,492 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 321.0) internal successors, (1605), 5 states have internal predecessors, (1605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:51:52,492 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 321.0) internal successors, (1605), 5 states have internal predecessors, (1605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:51:52,492 INFO L175 Difference]: Start difference. First operand has 343 places, 330 transitions, 1161 flow. Second operand 4 states and 1144 transitions. [2022-11-21 13:51:52,493 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 345 places, 339 transitions, 1272 flow [2022-11-21 13:51:52,498 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 325 places, 339 transitions, 1187 flow, removed 0 selfloop flow, removed 20 redundant places. [2022-11-21 13:51:52,503 INFO L231 Difference]: Finished difference. Result has 328 places, 329 transitions, 1106 flow [2022-11-21 13:51:52,503 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=321, PETRI_DIFFERENCE_MINUEND_FLOW=1046, PETRI_DIFFERENCE_MINUEND_PLACES=322, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=325, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=317, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1106, PETRI_PLACES=328, PETRI_TRANSITIONS=329} [2022-11-21 13:51:52,505 INFO L288 CegarLoopForPetriNet]: 269 programPoint places, 59 predicate places. [2022-11-21 13:51:52,505 INFO L495 AbstractCegarLoop]: Abstraction has has 328 places, 329 transitions, 1106 flow [2022-11-21 13:51:52,505 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 277.75) internal successors, (1111), 4 states have internal predecessors, (1111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:51:52,506 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 13:51:52,506 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:51:52,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-21 13:51:52,506 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 35 more)] === [2022-11-21 13:51:52,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:51:52,507 INFO L85 PathProgramCache]: Analyzing trace with hash 1944690792, now seen corresponding path program 1 times [2022-11-21 13:51:52,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:51:52,507 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227216666] [2022-11-21 13:51:52,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:51:52,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:51:52,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:51:55,204 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 11 proven. 79 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-11-21 13:51:55,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:51:55,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227216666] [2022-11-21 13:51:55,204 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227216666] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 13:51:55,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1136460433] [2022-11-21 13:51:55,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:51:55,205 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:51:55,205 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_489dc93a-ade0-402b-95de-4a8ffbc67c5e/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 13:51:55,206 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_489dc93a-ade0-402b-95de-4a8ffbc67c5e/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 13:51:55,243 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_489dc93a-ade0-402b-95de-4a8ffbc67c5e/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-21 13:51:55,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:51:55,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 393 conjuncts, 51 conjunts are in the unsatisfiable core [2022-11-21 13:51:55,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 13:51:56,065 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-21 13:51:56,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 13:51:56,365 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-21 13:51:56,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 13:51:56,630 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-21 13:51:56,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 13:51:56,889 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-21 13:51:57,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 13:51:57,147 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-21 13:51:57,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 13:51:57,588 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-21 13:51:57,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 13:51:57,750 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-21 13:51:57,815 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-21 13:51:57,841 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 48 proven. 47 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2022-11-21 13:51:57,841 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 13:51:58,034 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_339 (Array Int Int))) (< (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_339) c_~o_2~0.base) c_~o_2~0.offset) 9223372039002259456)) is different from false [2022-11-21 13:51:58,092 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_339 (Array Int Int)) (v_ArrVal_338 (Array Int Int))) (< (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_338) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_339) c_~o_2~0.base) c_~o_2~0.offset) 9223372039002259456)) is different from false [2022-11-21 13:51:58,125 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_339 (Array Int Int)) (v_ArrVal_338 (Array Int Int))) (< (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_338) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_339) |c_ULTIMATE.start_main_#t~ret10#1.base|) |c_ULTIMATE.start_main_#t~ret10#1.offset|) 9223372039002259456)) is different from false [2022-11-21 13:53:25,448 INFO L321 Elim1Store]: treesize reduction 364, result has 14.4 percent of original size [2022-11-21 13:53:25,448 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 5 case distinctions, treesize of input 53 treesize of output 74 [2022-11-21 13:53:25,464 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-21 13:53:25,465 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 126 treesize of output 120 [2022-11-21 13:53:25,478 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 49 [2022-11-21 13:53:25,484 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 102 treesize of output 94 [2022-11-21 13:53:44,786 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 38 proven. 53 refuted. 4 times theorem prover too weak. 95 trivial. 0 not checked. [2022-11-21 13:53:44,787 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1136460433] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 13:53:44,787 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 13:53:44,787 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 29] total 72 [2022-11-21 13:53:44,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63716752] [2022-11-21 13:53:44,788 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 13:53:44,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2022-11-21 13:53:44,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:53:44,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2022-11-21 13:53:44,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=468, Invalid=4285, Unknown=89, NotChecked=414, Total=5256 [2022-11-21 13:53:44,804 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 212 out of 321 [2022-11-21 13:53:44,818 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 328 places, 329 transitions, 1106 flow. Second operand has 73 states, 73 states have (on average 215.2054794520548) internal successors, (15710), 73 states have internal predecessors, (15710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:53:44,818 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 13:53:44,818 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 212 of 321 [2022-11-21 13:53:44,818 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 13:53:53,576 INFO L130 PetriNetUnfolder]: 1597/5635 cut-off events. [2022-11-21 13:53:53,576 INFO L131 PetriNetUnfolder]: For 2193/2196 co-relation queries the response was YES. [2022-11-21 13:53:53,614 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10370 conditions, 5635 events. 1597/5635 cut-off events. For 2193/2196 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 48155 event pairs, 172 based on Foata normal form. 7/4914 useless extension candidates. Maximal degree in co-relation 9950. Up to 842 conditions per place. [2022-11-21 13:53:53,641 INFO L137 encePairwiseOnDemand]: 282/321 looper letters, 189 selfloop transitions, 97 changer transitions 0/467 dead transitions. [2022-11-21 13:53:53,641 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 366 places, 467 transitions, 2144 flow [2022-11-21 13:53:53,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-11-21 13:53:53,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2022-11-21 13:53:53,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 8528 transitions. [2022-11-21 13:53:53,659 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6812045690550363 [2022-11-21 13:53:53,659 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 8528 transitions. [2022-11-21 13:53:53,659 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 8528 transitions. [2022-11-21 13:53:53,666 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 13:53:53,666 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 8528 transitions. [2022-11-21 13:53:53,682 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 218.66666666666666) internal successors, (8528), 39 states have internal predecessors, (8528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:53:53,699 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 321.0) internal successors, (12840), 40 states have internal predecessors, (12840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:53:53,704 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 321.0) internal successors, (12840), 40 states have internal predecessors, (12840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:53:53,705 INFO L175 Difference]: Start difference. First operand has 328 places, 329 transitions, 1106 flow. Second operand 39 states and 8528 transitions. [2022-11-21 13:53:53,705 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 366 places, 467 transitions, 2144 flow [2022-11-21 13:53:53,720 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 366 places, 467 transitions, 2144 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-21 13:53:53,728 INFO L231 Difference]: Finished difference. Result has 374 places, 351 transitions, 1497 flow [2022-11-21 13:53:53,730 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=321, PETRI_DIFFERENCE_MINUEND_FLOW=1106, PETRI_DIFFERENCE_MINUEND_PLACES=328, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=329, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=246, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=1497, PETRI_PLACES=374, PETRI_TRANSITIONS=351} [2022-11-21 13:53:53,731 INFO L288 CegarLoopForPetriNet]: 269 programPoint places, 105 predicate places. [2022-11-21 13:53:53,731 INFO L495 AbstractCegarLoop]: Abstraction has has 374 places, 351 transitions, 1497 flow [2022-11-21 13:53:53,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 215.2054794520548) internal successors, (15710), 73 states have internal predecessors, (15710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:53:53,736 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 13:53:53,736 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:53:53,749 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_489dc93a-ade0-402b-95de-4a8ffbc67c5e/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-21 13:53:53,944 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_489dc93a-ade0-402b-95de-4a8ffbc67c5e/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-21 13:53:53,945 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 35 more)] === [2022-11-21 13:53:53,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:53:53,946 INFO L85 PathProgramCache]: Analyzing trace with hash 1264152792, now seen corresponding path program 1 times [2022-11-21 13:53:53,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:53:53,946 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419981813] [2022-11-21 13:53:53,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:53:53,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:53:54,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:53:57,667 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 11 proven. 108 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2022-11-21 13:53:57,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:53:57,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419981813] [2022-11-21 13:53:57,668 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419981813] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 13:53:57,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1943514679] [2022-11-21 13:53:57,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:53:57,668 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:53:57,669 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_489dc93a-ade0-402b-95de-4a8ffbc67c5e/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 13:53:57,670 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_489dc93a-ade0-402b-95de-4a8ffbc67c5e/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 13:53:57,681 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_489dc93a-ade0-402b-95de-4a8ffbc67c5e/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-21 13:53:57,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:53:57,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 399 conjuncts, 63 conjunts are in the unsatisfiable core [2022-11-21 13:53:57,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 13:53:57,869 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-21 13:53:58,017 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-21 13:53:58,018 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-11-21 13:53:58,377 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-21 13:53:58,822 INFO L321 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2022-11-21 13:53:58,822 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2022-11-21 13:53:59,193 INFO L321 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2022-11-21 13:53:59,194 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2022-11-21 13:53:59,553 INFO L321 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2022-11-21 13:53:59,553 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2022-11-21 13:53:59,905 INFO L321 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2022-11-21 13:53:59,906 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2022-11-21 13:54:00,760 INFO L321 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2022-11-21 13:54:00,760 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2022-11-21 13:54:01,081 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-21 13:54:01,249 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-21 13:54:01,417 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-21 13:54:01,593 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-21 13:54:01,772 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-21 13:54:02,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 13:54:02,048 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-21 13:54:02,177 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-21 13:54:02,410 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-21 13:54:02,516 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 48 proven. 76 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-11-21 13:54:02,517 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 13:54:02,872 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_422 (Array Int Int))) (< (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_422) c_~o_0~0.base) c_~o_0~0.offset) 9223372039002259456)) is different from false [2022-11-21 13:54:07,779 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_421 (Array Int Int)) (v_ArrVal_420 (Array Int Int)) (v_ArrVal_422 (Array Int Int))) (< (select (select (store (store (store |c_#memory_int| |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base| v_ArrVal_420) |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_421) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_422) c_~o_0~0.base) c_~o_0~0.offset) 9223372039002259456)) is different from false [2022-11-21 13:55:09,284 INFO L321 Elim1Store]: treesize reduction 203, result has 19.4 percent of original size [2022-11-21 13:55:09,284 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 49 treesize of output 65 [2022-11-21 13:55:09,311 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-21 13:55:09,312 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 1954 treesize of output 1892 [2022-11-21 13:55:09,338 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1878 treesize of output 1750 [2022-11-21 13:55:09,364 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1750 treesize of output 1718 [2022-11-21 13:55:09,389 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1718 treesize of output 1654 [2022-11-21 13:56:12,825 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-21 13:56:12,826 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 18 [2022-11-21 13:56:12,935 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 37 proven. 53 refuted. 0 times theorem prover too weak. 71 trivial. 29 not checked. [2022-11-21 13:56:12,935 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1943514679] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 13:56:12,935 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 13:56:12,935 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 30] total 81 [2022-11-21 13:56:12,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003213040] [2022-11-21 13:56:12,936 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 13:56:12,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2022-11-21 13:56:12,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:56:12,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2022-11-21 13:56:12,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=458, Invalid=5792, Unknown=78, NotChecked=314, Total=6642 [2022-11-21 13:56:12,951 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 209 out of 321 [2022-11-21 13:56:12,966 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 374 places, 351 transitions, 1497 flow. Second operand has 82 states, 82 states have (on average 212.4268292682927) internal successors, (17419), 82 states have internal predecessors, (17419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:56:12,966 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 13:56:12,966 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 209 of 321 [2022-11-21 13:56:12,966 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 13:56:29,516 INFO L130 PetriNetUnfolder]: 6785/22145 cut-off events. [2022-11-21 13:56:29,516 INFO L131 PetriNetUnfolder]: For 8026/8149 co-relation queries the response was YES. [2022-11-21 13:56:29,660 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38838 conditions, 22145 events. 6785/22145 cut-off events. For 8026/8149 co-relation queries the response was YES. Maximal size of possible extension queue 1046. Compared 262568 event pairs, 1463 based on Foata normal form. 2/17919 useless extension candidates. Maximal degree in co-relation 38344. Up to 2842 conditions per place. [2022-11-21 13:56:29,780 INFO L137 encePairwiseOnDemand]: 286/321 looper letters, 211 selfloop transitions, 56 changer transitions 0/475 dead transitions. [2022-11-21 13:56:29,780 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 420 places, 475 transitions, 2390 flow [2022-11-21 13:56:29,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-11-21 13:56:29,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2022-11-21 13:56:29,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 10047 transitions. [2022-11-21 13:56:29,798 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6659375621395903 [2022-11-21 13:56:29,798 INFO L72 ComplementDD]: Start complementDD. Operand 47 states and 10047 transitions. [2022-11-21 13:56:29,798 INFO L73 IsDeterministic]: Start isDeterministic. Operand 47 states and 10047 transitions. [2022-11-21 13:56:29,803 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 13:56:29,803 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 47 states and 10047 transitions. [2022-11-21 13:56:29,823 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 48 states, 47 states have (on average 213.7659574468085) internal successors, (10047), 47 states have internal predecessors, (10047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:56:29,845 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 48 states, 48 states have (on average 321.0) internal successors, (15408), 48 states have internal predecessors, (15408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:56:29,849 INFO L81 ComplementDD]: Finished complementDD. Result has 48 states, 48 states have (on average 321.0) internal successors, (15408), 48 states have internal predecessors, (15408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:56:29,850 INFO L175 Difference]: Start difference. First operand has 374 places, 351 transitions, 1497 flow. Second operand 47 states and 10047 transitions. [2022-11-21 13:56:29,850 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 420 places, 475 transitions, 2390 flow [2022-11-21 13:56:29,871 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 394 places, 475 transitions, 2215 flow, removed 38 selfloop flow, removed 26 redundant places. [2022-11-21 13:56:29,879 INFO L231 Difference]: Finished difference. Result has 404 places, 364 transitions, 1533 flow [2022-11-21 13:56:29,880 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=321, PETRI_DIFFERENCE_MINUEND_FLOW=1338, PETRI_DIFFERENCE_MINUEND_PLACES=348, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=351, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=298, PETRI_DIFFERENCE_SUBTRAHEND_STATES=47, PETRI_FLOW=1533, PETRI_PLACES=404, PETRI_TRANSITIONS=364} [2022-11-21 13:56:29,881 INFO L288 CegarLoopForPetriNet]: 269 programPoint places, 135 predicate places. [2022-11-21 13:56:29,882 INFO L495 AbstractCegarLoop]: Abstraction has has 404 places, 364 transitions, 1533 flow [2022-11-21 13:56:29,885 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 82 states have (on average 212.4268292682927) internal successors, (17419), 82 states have internal predecessors, (17419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:56:29,886 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 13:56:29,888 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:56:29,896 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_489dc93a-ade0-402b-95de-4a8ffbc67c5e/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-21 13:56:30,095 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_489dc93a-ade0-402b-95de-4a8ffbc67c5e/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-21 13:56:30,095 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 35 more)] === [2022-11-21 13:56:30,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:56:30,096 INFO L85 PathProgramCache]: Analyzing trace with hash 534031778, now seen corresponding path program 1 times [2022-11-21 13:56:30,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:56:30,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160650580] [2022-11-21 13:56:30,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:56:30,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:56:30,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:56:30,258 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2022-11-21 13:56:30,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:56:30,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160650580] [2022-11-21 13:56:30,259 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160650580] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 13:56:30,259 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 13:56:30,259 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 13:56:30,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643392183] [2022-11-21 13:56:30,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 13:56:30,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-21 13:56:30,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:56:30,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-21 13:56:30,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-21 13:56:30,263 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 276 out of 321 [2022-11-21 13:56:30,274 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 404 places, 364 transitions, 1533 flow. Second operand has 4 states, 4 states have (on average 278.0) internal successors, (1112), 4 states have internal predecessors, (1112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:56:30,274 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 13:56:30,274 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 276 of 321 [2022-11-21 13:56:30,275 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 13:56:32,364 INFO L130 PetriNetUnfolder]: 677/4737 cut-off events. [2022-11-21 13:56:32,364 INFO L131 PetriNetUnfolder]: For 1559/1568 co-relation queries the response was YES. [2022-11-21 13:56:32,403 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7347 conditions, 4737 events. 677/4737 cut-off events. For 1559/1568 co-relation queries the response was YES. Maximal size of possible extension queue 310. Compared 51848 event pairs, 270 based on Foata normal form. 48/3763 useless extension candidates. Maximal degree in co-relation 7017. Up to 692 conditions per place. [2022-11-21 13:56:32,420 INFO L137 encePairwiseOnDemand]: 314/321 looper letters, 36 selfloop transitions, 6 changer transitions 0/373 dead transitions. [2022-11-21 13:56:32,421 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 406 places, 373 transitions, 1631 flow [2022-11-21 13:56:32,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-21 13:56:32,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-21 13:56:32,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1143 transitions. [2022-11-21 13:56:32,423 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8901869158878505 [2022-11-21 13:56:32,423 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1143 transitions. [2022-11-21 13:56:32,423 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1143 transitions. [2022-11-21 13:56:32,424 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 13:56:32,424 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1143 transitions. [2022-11-21 13:56:32,426 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 285.75) internal successors, (1143), 4 states have internal predecessors, (1143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:56:32,427 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 321.0) internal successors, (1605), 5 states have internal predecessors, (1605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:56:32,428 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 321.0) internal successors, (1605), 5 states have internal predecessors, (1605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:56:32,428 INFO L175 Difference]: Start difference. First operand has 404 places, 364 transitions, 1533 flow. Second operand 4 states and 1143 transitions. [2022-11-21 13:56:32,428 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 406 places, 373 transitions, 1631 flow [2022-11-21 13:56:32,440 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 391 places, 373 transitions, 1594 flow, removed 4 selfloop flow, removed 15 redundant places. [2022-11-21 13:56:32,446 INFO L231 Difference]: Finished difference. Result has 394 places, 364 transitions, 1522 flow [2022-11-21 13:56:32,446 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=321, PETRI_DIFFERENCE_MINUEND_FLOW=1480, PETRI_DIFFERENCE_MINUEND_PLACES=388, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=361, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=355, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1522, PETRI_PLACES=394, PETRI_TRANSITIONS=364} [2022-11-21 13:56:32,447 INFO L288 CegarLoopForPetriNet]: 269 programPoint places, 125 predicate places. [2022-11-21 13:56:32,447 INFO L495 AbstractCegarLoop]: Abstraction has has 394 places, 364 transitions, 1522 flow [2022-11-21 13:56:32,448 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 278.0) internal successors, (1112), 4 states have internal predecessors, (1112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:56:32,448 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 13:56:32,448 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:56:32,448 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-21 13:56:32,449 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 35 more)] === [2022-11-21 13:56:32,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:56:32,449 INFO L85 PathProgramCache]: Analyzing trace with hash -1345034655, now seen corresponding path program 1 times [2022-11-21 13:56:32,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:56:32,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877757939] [2022-11-21 13:56:32,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:56:32,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:56:32,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:56:32,564 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2022-11-21 13:56:32,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:56:32,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877757939] [2022-11-21 13:56:32,564 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877757939] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 13:56:32,565 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 13:56:32,565 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 13:56:32,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770881620] [2022-11-21 13:56:32,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 13:56:32,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-21 13:56:32,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:56:32,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-21 13:56:32,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-21 13:56:32,568 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 276 out of 321 [2022-11-21 13:56:32,569 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 394 places, 364 transitions, 1522 flow. Second operand has 4 states, 4 states have (on average 278.25) internal successors, (1113), 4 states have internal predecessors, (1113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:56:32,569 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 13:56:32,569 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 276 of 321 [2022-11-21 13:56:32,569 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 13:56:33,997 INFO L130 PetriNetUnfolder]: 174/3420 cut-off events. [2022-11-21 13:56:33,998 INFO L131 PetriNetUnfolder]: For 1150/1155 co-relation queries the response was YES. [2022-11-21 13:56:34,021 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5267 conditions, 3420 events. 174/3420 cut-off events. For 1150/1155 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 25968 event pairs, 35 based on Foata normal form. 9/2968 useless extension candidates. Maximal degree in co-relation 4950. Up to 173 conditions per place. [2022-11-21 13:56:34,036 INFO L137 encePairwiseOnDemand]: 316/321 looper letters, 48 selfloop transitions, 7 changer transitions 0/374 dead transitions. [2022-11-21 13:56:34,036 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 397 places, 374 transitions, 1661 flow [2022-11-21 13:56:34,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-21 13:56:34,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-21 13:56:34,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1142 transitions. [2022-11-21 13:56:34,039 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8894080996884736 [2022-11-21 13:56:34,039 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1142 transitions. [2022-11-21 13:56:34,039 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1142 transitions. [2022-11-21 13:56:34,040 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 13:56:34,040 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1142 transitions. [2022-11-21 13:56:34,041 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 285.5) internal successors, (1142), 4 states have internal predecessors, (1142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:56:34,043 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 321.0) internal successors, (1605), 5 states have internal predecessors, (1605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:56:34,043 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 321.0) internal successors, (1605), 5 states have internal predecessors, (1605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:56:34,044 INFO L175 Difference]: Start difference. First operand has 394 places, 364 transitions, 1522 flow. Second operand 4 states and 1142 transitions. [2022-11-21 13:56:34,044 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 397 places, 374 transitions, 1661 flow [2022-11-21 13:56:34,056 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 396 places, 374 transitions, 1654 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-21 13:56:34,061 INFO L231 Difference]: Finished difference. Result has 397 places, 364 transitions, 1540 flow [2022-11-21 13:56:34,061 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=321, PETRI_DIFFERENCE_MINUEND_FLOW=1509, PETRI_DIFFERENCE_MINUEND_PLACES=393, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=363, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=356, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1540, PETRI_PLACES=397, PETRI_TRANSITIONS=364} [2022-11-21 13:56:34,062 INFO L288 CegarLoopForPetriNet]: 269 programPoint places, 128 predicate places. [2022-11-21 13:56:34,062 INFO L495 AbstractCegarLoop]: Abstraction has has 397 places, 364 transitions, 1540 flow [2022-11-21 13:56:34,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 278.25) internal successors, (1113), 4 states have internal predecessors, (1113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:56:34,063 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 13:56:34,063 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:56:34,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-21 13:56:34,063 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 35 more)] === [2022-11-21 13:56:34,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:56:34,064 INFO L85 PathProgramCache]: Analyzing trace with hash 1253599483, now seen corresponding path program 1 times [2022-11-21 13:56:34,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:56:34,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890731321] [2022-11-21 13:56:34,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:56:34,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:56:34,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:56:36,288 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 11 proven. 79 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-11-21 13:56:36,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:56:36,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890731321] [2022-11-21 13:56:36,288 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890731321] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 13:56:36,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1059157408] [2022-11-21 13:56:36,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:56:36,289 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:56:36,289 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_489dc93a-ade0-402b-95de-4a8ffbc67c5e/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 13:56:36,293 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_489dc93a-ade0-402b-95de-4a8ffbc67c5e/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 13:56:36,295 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_489dc93a-ade0-402b-95de-4a8ffbc67c5e/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-21 13:56:36,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:56:36,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 45 conjunts are in the unsatisfiable core [2022-11-21 13:56:36,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 13:56:36,885 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-21 13:56:37,153 INFO L321 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2022-11-21 13:56:37,154 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-11-21 13:56:37,383 INFO L321 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2022-11-21 13:56:37,383 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-11-21 13:56:37,599 INFO L321 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2022-11-21 13:56:37,599 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-11-21 13:56:37,884 INFO L321 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2022-11-21 13:56:37,884 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-11-21 13:56:38,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 13:56:38,291 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-21 13:56:38,479 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2022-11-21 13:56:38,574 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 48 proven. 47 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2022-11-21 13:56:38,575 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 13:56:39,017 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_555 (Array Int Int))) (< 0 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_555) |c_ULTIMATE.start_main_#t~ret10#1.base|) |c_ULTIMATE.start_main_#t~ret10#1.offset|) 4294967296))) is different from false [2022-11-21 13:56:39,176 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_555 (Array Int Int))) (< 0 (+ 4294967296 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_555) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)))) is different from false [2022-11-21 13:57:55,583 INFO L321 Elim1Store]: treesize reduction 364, result has 14.4 percent of original size [2022-11-21 13:57:55,584 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 5 case distinctions, treesize of input 52 treesize of output 73 [2022-11-21 13:57:55,601 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-21 13:57:55,601 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 36 [2022-11-21 13:58:16,443 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 40 proven. 24 refuted. 2 times theorem prover too weak. 95 trivial. 29 not checked. [2022-11-21 13:58:16,444 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1059157408] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 13:58:16,444 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 13:58:16,444 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 27] total 69 [2022-11-21 13:58:16,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903550750] [2022-11-21 13:58:16,444 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 13:58:16,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-11-21 13:58:16,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:58:16,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-11-21 13:58:16,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=382, Invalid=4085, Unknown=97, NotChecked=266, Total=4830 [2022-11-21 13:58:16,463 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 214 out of 321 [2022-11-21 13:58:16,477 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 397 places, 364 transitions, 1540 flow. Second operand has 70 states, 70 states have (on average 217.42857142857142) internal successors, (15220), 70 states have internal predecessors, (15220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:58:16,477 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 13:58:16,478 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 214 of 321 [2022-11-21 13:58:16,478 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 13:58:41,362 INFO L130 PetriNetUnfolder]: 7187/53304 cut-off events. [2022-11-21 13:58:41,363 INFO L131 PetriNetUnfolder]: For 20222/20225 co-relation queries the response was YES. [2022-11-21 13:58:41,844 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83266 conditions, 53304 events. 7187/53304 cut-off events. For 20222/20225 co-relation queries the response was YES. Maximal size of possible extension queue 811. Compared 778573 event pairs, 3532 based on Foata normal form. 2/45321 useless extension candidates. Maximal degree in co-relation 82861. Up to 5563 conditions per place. [2022-11-21 13:58:42,217 INFO L137 encePairwiseOnDemand]: 281/321 looper letters, 229 selfloop transitions, 102 changer transitions 0/523 dead transitions. [2022-11-21 13:58:42,217 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 440 places, 523 transitions, 2788 flow [2022-11-21 13:58:42,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-11-21 13:58:42,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2022-11-21 13:58:42,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 9716 transitions. [2022-11-21 13:58:42,244 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6879071084678561 [2022-11-21 13:58:42,245 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 9716 transitions. [2022-11-21 13:58:42,245 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 9716 transitions. [2022-11-21 13:58:42,250 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 13:58:42,250 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 9716 transitions. [2022-11-21 13:58:42,274 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 45 states, 44 states have (on average 220.8181818181818) internal successors, (9716), 44 states have internal predecessors, (9716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:58:42,288 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 45 states, 45 states have (on average 321.0) internal successors, (14445), 45 states have internal predecessors, (14445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:58:42,291 INFO L81 ComplementDD]: Finished complementDD. Result has 45 states, 45 states have (on average 321.0) internal successors, (14445), 45 states have internal predecessors, (14445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:58:42,292 INFO L175 Difference]: Start difference. First operand has 397 places, 364 transitions, 1540 flow. Second operand 44 states and 9716 transitions. [2022-11-21 13:58:42,292 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 440 places, 523 transitions, 2788 flow [2022-11-21 13:58:42,422 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 438 places, 523 transitions, 2754 flow, removed 5 selfloop flow, removed 2 redundant places. [2022-11-21 13:58:42,429 INFO L231 Difference]: Finished difference. Result has 442 places, 375 transitions, 1840 flow [2022-11-21 13:58:42,429 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=321, PETRI_DIFFERENCE_MINUEND_FLOW=1525, PETRI_DIFFERENCE_MINUEND_PLACES=395, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=364, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=271, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=1840, PETRI_PLACES=442, PETRI_TRANSITIONS=375} [2022-11-21 13:58:42,430 INFO L288 CegarLoopForPetriNet]: 269 programPoint places, 173 predicate places. [2022-11-21 13:58:42,431 INFO L495 AbstractCegarLoop]: Abstraction has has 442 places, 375 transitions, 1840 flow [2022-11-21 13:58:42,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 217.42857142857142) internal successors, (15220), 70 states have internal predecessors, (15220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:58:42,433 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 13:58:42,433 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:58:42,440 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_489dc93a-ade0-402b-95de-4a8ffbc67c5e/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-21 13:58:42,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_489dc93a-ade0-402b-95de-4a8ffbc67c5e/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-21 13:58:42,640 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 35 more)] === [2022-11-21 13:58:42,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:58:42,640 INFO L85 PathProgramCache]: Analyzing trace with hash -1301352226, now seen corresponding path program 1 times [2022-11-21 13:58:42,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:58:42,641 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298697202] [2022-11-21 13:58:42,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:58:42,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:58:42,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:58:42,762 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2022-11-21 13:58:42,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:58:42,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298697202] [2022-11-21 13:58:42,764 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [298697202] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 13:58:42,764 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 13:58:42,764 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 13:58:42,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239833668] [2022-11-21 13:58:42,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 13:58:42,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-21 13:58:42,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:58:42,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-21 13:58:42,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-21 13:58:42,767 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 276 out of 321 [2022-11-21 13:58:42,767 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 442 places, 375 transitions, 1840 flow. Second operand has 4 states, 4 states have (on average 278.5) internal successors, (1114), 4 states have internal predecessors, (1114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:58:42,768 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 13:58:42,768 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 276 of 321 [2022-11-21 13:58:42,768 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 13:58:43,895 INFO L130 PetriNetUnfolder]: 193/3555 cut-off events. [2022-11-21 13:58:43,895 INFO L131 PetriNetUnfolder]: For 1724/1729 co-relation queries the response was YES. [2022-11-21 13:58:43,933 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5743 conditions, 3555 events. 193/3555 cut-off events. For 1724/1729 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 27469 event pairs, 54 based on Foata normal form. 8/3092 useless extension candidates. Maximal degree in co-relation 5371. Up to 223 conditions per place. [2022-11-21 13:58:43,950 INFO L137 encePairwiseOnDemand]: 316/321 looper letters, 53 selfloop transitions, 7 changer transitions 0/383 dead transitions. [2022-11-21 13:58:43,950 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 444 places, 383 transitions, 1989 flow [2022-11-21 13:58:43,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-21 13:58:43,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-21 13:58:43,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1140 transitions. [2022-11-21 13:58:43,952 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8878504672897196 [2022-11-21 13:58:43,953 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1140 transitions. [2022-11-21 13:58:43,953 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1140 transitions. [2022-11-21 13:58:43,953 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 13:58:43,953 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1140 transitions. [2022-11-21 13:58:43,955 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 285.0) internal successors, (1140), 4 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:58:43,956 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 321.0) internal successors, (1605), 5 states have internal predecessors, (1605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:58:43,957 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 321.0) internal successors, (1605), 5 states have internal predecessors, (1605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:58:43,957 INFO L175 Difference]: Start difference. First operand has 442 places, 375 transitions, 1840 flow. Second operand 4 states and 1140 transitions. [2022-11-21 13:58:43,957 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 444 places, 383 transitions, 1989 flow [2022-11-21 13:58:43,975 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 406 places, 383 transitions, 1821 flow, removed 2 selfloop flow, removed 38 redundant places. [2022-11-21 13:58:43,979 INFO L231 Difference]: Finished difference. Result has 408 places, 374 transitions, 1706 flow [2022-11-21 13:58:43,980 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=321, PETRI_DIFFERENCE_MINUEND_FLOW=1642, PETRI_DIFFERENCE_MINUEND_PLACES=403, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=371, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=364, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1706, PETRI_PLACES=408, PETRI_TRANSITIONS=374} [2022-11-21 13:58:43,981 INFO L288 CegarLoopForPetriNet]: 269 programPoint places, 139 predicate places. [2022-11-21 13:58:43,981 INFO L495 AbstractCegarLoop]: Abstraction has has 408 places, 374 transitions, 1706 flow [2022-11-21 13:58:43,981 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 278.5) internal successors, (1114), 4 states have internal predecessors, (1114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:58:43,981 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 13:58:43,981 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:58:43,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-21 13:58:43,982 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 35 more)] === [2022-11-21 13:58:43,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:58:43,982 INFO L85 PathProgramCache]: Analyzing trace with hash 1101989224, now seen corresponding path program 1 times [2022-11-21 13:58:43,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:58:43,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124374951] [2022-11-21 13:58:43,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:58:43,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:58:44,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:58:47,845 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 27 proven. 158 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-21 13:58:47,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:58:47,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124374951] [2022-11-21 13:58:47,845 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124374951] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 13:58:47,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [180080042] [2022-11-21 13:58:47,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:58:47,845 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:58:47,846 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_489dc93a-ade0-402b-95de-4a8ffbc67c5e/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 13:58:47,846 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_489dc93a-ade0-402b-95de-4a8ffbc67c5e/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 13:58:47,849 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_489dc93a-ade0-402b-95de-4a8ffbc67c5e/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-21 13:58:48,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:58:48,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 405 conjuncts, 51 conjunts are in the unsatisfiable core [2022-11-21 13:58:48,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 13:58:48,946 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-21 13:58:49,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 13:58:49,375 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2022-11-21 13:58:49,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 13:58:49,764 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2022-11-21 13:58:50,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 13:58:50,146 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2022-11-21 13:58:50,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 13:58:50,534 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2022-11-21 13:58:51,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 13:58:51,149 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-21 13:58:51,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 13:58:51,300 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-21 13:58:51,477 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2022-11-21 13:58:51,537 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 48 proven. 47 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2022-11-21 13:58:51,537 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 13:58:51,981 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_661 (Array Int Int))) (< 0 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_661) c_~o_2~0.base) c_~o_2~0.offset) 4294967296))) is different from false [2022-11-21 13:58:52,007 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_661 (Array Int Int)) (v_ArrVal_660 (Array Int Int))) (< 0 (+ (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_660) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_661) c_~o_2~0.base) c_~o_2~0.offset) 4294967296))) is different from false [2022-11-21 13:58:52,058 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_661 (Array Int Int)) (v_ArrVal_660 (Array Int Int))) (< 0 (+ (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_660) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_661) |c_ULTIMATE.start_main_#t~ret10#1.base|) |c_ULTIMATE.start_main_#t~ret10#1.offset|) 4294967296))) is different from false [2022-11-21 14:00:18,851 INFO L321 Elim1Store]: treesize reduction 364, result has 14.4 percent of original size [2022-11-21 14:00:18,851 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 5 case distinctions, treesize of input 55 treesize of output 76 [2022-11-21 14:00:18,868 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-21 14:00:18,868 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 142 treesize of output 136 [2022-11-21 14:00:18,874 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 122 treesize of output 118 [2022-11-21 14:00:18,880 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 118 treesize of output 110 [2022-11-21 14:00:40,246 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 36 proven. 53 refuted. 6 times theorem prover too weak. 95 trivial. 0 not checked. [2022-11-21 14:00:40,246 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [180080042] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 14:00:40,246 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 14:00:40,247 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 26, 29] total 81 [2022-11-21 14:00:40,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565634894] [2022-11-21 14:00:40,247 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 14:00:40,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2022-11-21 14:00:40,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 14:00:40,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2022-11-21 14:00:40,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=5526, Unknown=118, NotChecked=468, Total=6642 [2022-11-21 14:00:40,260 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 212 out of 321 [2022-11-21 14:00:40,270 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 408 places, 374 transitions, 1706 flow. Second operand has 82 states, 82 states have (on average 215.52439024390245) internal successors, (17673), 82 states have internal predecessors, (17673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 14:00:40,271 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 14:00:40,271 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 212 of 321 [2022-11-21 14:00:40,271 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 14:00:57,753 INFO L130 PetriNetUnfolder]: 6744/24611 cut-off events. [2022-11-21 14:00:57,753 INFO L131 PetriNetUnfolder]: For 19918/19921 co-relation queries the response was YES. [2022-11-21 14:00:57,945 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48023 conditions, 24611 events. 6744/24611 cut-off events. For 19918/19921 co-relation queries the response was YES. Maximal size of possible extension queue 900. Compared 295210 event pairs, 1526 based on Foata normal form. 27/20855 useless extension candidates. Maximal degree in co-relation 47608. Up to 3300 conditions per place. [2022-11-21 14:00:58,234 INFO L137 encePairwiseOnDemand]: 282/321 looper letters, 201 selfloop transitions, 84 changer transitions 0/478 dead transitions. [2022-11-21 14:00:58,234 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 442 places, 478 transitions, 2631 flow [2022-11-21 14:00:58,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-11-21 14:00:58,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2022-11-21 14:00:58,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 7660 transitions. [2022-11-21 14:00:58,243 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6817979528259902 [2022-11-21 14:00:58,243 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 7660 transitions. [2022-11-21 14:00:58,243 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 7660 transitions. [2022-11-21 14:00:58,246 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 14:00:58,246 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 7660 transitions. [2022-11-21 14:00:58,255 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 218.85714285714286) internal successors, (7660), 35 states have internal predecessors, (7660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 14:00:58,272 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 321.0) internal successors, (11556), 36 states have internal predecessors, (11556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 14:00:58,274 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 321.0) internal successors, (11556), 36 states have internal predecessors, (11556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 14:00:58,275 INFO L175 Difference]: Start difference. First operand has 408 places, 374 transitions, 1706 flow. Second operand 35 states and 7660 transitions. [2022-11-21 14:00:58,275 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 442 places, 478 transitions, 2631 flow [2022-11-21 14:00:58,382 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 441 places, 478 transitions, 2623 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-21 14:00:58,387 INFO L231 Difference]: Finished difference. Result has 443 places, 376 transitions, 1918 flow [2022-11-21 14:00:58,388 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=321, PETRI_DIFFERENCE_MINUEND_FLOW=1700, PETRI_DIFFERENCE_MINUEND_PLACES=407, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=374, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=291, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=1918, PETRI_PLACES=443, PETRI_TRANSITIONS=376} [2022-11-21 14:00:58,388 INFO L288 CegarLoopForPetriNet]: 269 programPoint places, 174 predicate places. [2022-11-21 14:00:58,388 INFO L495 AbstractCegarLoop]: Abstraction has has 443 places, 376 transitions, 1918 flow [2022-11-21 14:00:58,390 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 82 states have (on average 215.52439024390245) internal successors, (17673), 82 states have internal predecessors, (17673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 14:00:58,390 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 14:00:58,390 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:00:58,395 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_489dc93a-ade0-402b-95de-4a8ffbc67c5e/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-21 14:00:58,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_489dc93a-ade0-402b-95de-4a8ffbc67c5e/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-21 14:00:58,592 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 35 more)] === [2022-11-21 14:00:58,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 14:00:58,592 INFO L85 PathProgramCache]: Analyzing trace with hash -1237263863, now seen corresponding path program 1 times [2022-11-21 14:00:58,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 14:00:58,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648010592] [2022-11-21 14:00:58,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 14:00:58,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 14:00:58,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 14:00:58,718 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2022-11-21 14:00:58,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 14:00:58,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648010592] [2022-11-21 14:00:58,719 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [648010592] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 14:00:58,719 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 14:00:58,719 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 14:00:58,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438531810] [2022-11-21 14:00:58,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 14:00:58,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-21 14:00:58,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 14:00:58,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-21 14:00:58,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-21 14:00:58,722 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 276 out of 321 [2022-11-21 14:00:58,722 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 443 places, 376 transitions, 1918 flow. Second operand has 4 states, 4 states have (on average 278.5) internal successors, (1114), 4 states have internal predecessors, (1114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 14:00:58,723 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 14:00:58,723 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 276 of 321 [2022-11-21 14:00:58,723 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 14:01:00,246 INFO L130 PetriNetUnfolder]: 723/4879 cut-off events. [2022-11-21 14:01:00,246 INFO L131 PetriNetUnfolder]: For 2628/2638 co-relation queries the response was YES. [2022-11-21 14:01:00,424 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8050 conditions, 4879 events. 723/4879 cut-off events. For 2628/2638 co-relation queries the response was YES. Maximal size of possible extension queue 453. Compared 54601 event pairs, 240 based on Foata normal form. 24/3802 useless extension candidates. Maximal degree in co-relation 7681. Up to 672 conditions per place. [2022-11-21 14:01:00,438 INFO L137 encePairwiseOnDemand]: 316/321 looper letters, 37 selfloop transitions, 5 changer transitions 0/385 dead transitions. [2022-11-21 14:01:00,438 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 446 places, 385 transitions, 2022 flow [2022-11-21 14:01:00,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-21 14:01:00,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-21 14:01:00,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1141 transitions. [2022-11-21 14:01:00,441 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8886292834890965 [2022-11-21 14:01:00,441 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1141 transitions. [2022-11-21 14:01:00,441 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1141 transitions. [2022-11-21 14:01:00,442 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 14:01:00,442 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1141 transitions. [2022-11-21 14:01:00,444 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 285.25) internal successors, (1141), 4 states have internal predecessors, (1141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 14:01:00,445 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 321.0) internal successors, (1605), 5 states have internal predecessors, (1605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 14:01:00,446 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 321.0) internal successors, (1605), 5 states have internal predecessors, (1605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 14:01:00,446 INFO L175 Difference]: Start difference. First operand has 443 places, 376 transitions, 1918 flow. Second operand 4 states and 1141 transitions. [2022-11-21 14:01:00,446 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 446 places, 385 transitions, 2022 flow [2022-11-21 14:01:00,468 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 412 places, 385 transitions, 1876 flow, removed 2 selfloop flow, removed 34 redundant places. [2022-11-21 14:01:00,474 INFO L231 Difference]: Finished difference. Result has 413 places, 376 transitions, 1787 flow [2022-11-21 14:01:00,474 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=321, PETRI_DIFFERENCE_MINUEND_FLOW=1766, PETRI_DIFFERENCE_MINUEND_PLACES=409, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=375, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=370, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1787, PETRI_PLACES=413, PETRI_TRANSITIONS=376} [2022-11-21 14:01:00,475 INFO L288 CegarLoopForPetriNet]: 269 programPoint places, 144 predicate places. [2022-11-21 14:01:00,475 INFO L495 AbstractCegarLoop]: Abstraction has has 413 places, 376 transitions, 1787 flow [2022-11-21 14:01:00,475 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 278.5) internal successors, (1114), 4 states have internal predecessors, (1114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 14:01:00,475 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 14:01:00,476 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:01:00,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-21 14:01:00,476 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 35 more)] === [2022-11-21 14:01:00,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 14:01:00,477 INFO L85 PathProgramCache]: Analyzing trace with hash -1365616576, now seen corresponding path program 1 times [2022-11-21 14:01:00,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 14:01:00,477 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363636296] [2022-11-21 14:01:00,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 14:01:00,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 14:01:00,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 14:01:04,093 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 27 proven. 97 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-11-21 14:01:04,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 14:01:04,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363636296] [2022-11-21 14:01:04,094 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1363636296] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 14:01:04,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [951298108] [2022-11-21 14:01:04,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 14:01:04,094 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 14:01:04,094 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_489dc93a-ade0-402b-95de-4a8ffbc67c5e/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 14:01:04,098 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_489dc93a-ade0-402b-95de-4a8ffbc67c5e/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 14:01:04,099 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_489dc93a-ade0-402b-95de-4a8ffbc67c5e/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-21 14:01:04,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 14:01:04,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 403 conjuncts, 69 conjunts are in the unsatisfiable core [2022-11-21 14:01:04,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 14:01:04,269 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-21 14:01:04,355 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-21 14:01:04,355 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-11-21 14:01:04,432 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-21 14:01:04,432 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-11-21 14:01:04,895 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-21 14:01:05,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 14:01:05,424 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-21 14:01:05,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 14:01:05,833 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-21 14:01:06,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 14:01:06,257 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-21 14:01:06,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 14:01:06,721 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-21 14:01:07,719 INFO L321 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2022-11-21 14:01:07,720 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2022-11-21 14:01:08,054 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-21 14:01:08,218 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-21 14:01:08,374 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-21 14:01:08,536 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-21 14:01:08,686 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-21 14:01:08,875 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-21 14:01:08,983 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-21 14:01:09,229 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 48 proven. 76 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-11-21 14:01:09,229 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 14:01:09,620 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_772 (Array Int Int))) (< (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_772) c_~o_0~0.base) c_~o_0~0.offset) 2147483648)) is different from false [2022-11-21 14:01:09,703 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_771 (Array Int Int)) (v_ArrVal_772 (Array Int Int))) (< (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base| v_ArrVal_771) |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_772) c_~o_0~0.base) c_~o_0~0.offset) 2147483648)) is different from false [2022-11-21 14:02:43,947 INFO L321 Elim1Store]: treesize reduction 364, result has 14.4 percent of original size [2022-11-21 14:02:43,948 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 5 case distinctions, treesize of input 53 treesize of output 74 [2022-11-21 14:02:43,965 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-21 14:02:43,965 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 62 [2022-11-21 14:02:43,973 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 44 [2022-11-21 14:02:43,980 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2022-11-21 14:03:03,289 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 37 proven. 53 refuted. 5 times theorem prover too weak. 66 trivial. 29 not checked. [2022-11-21 14:03:03,289 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [951298108] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 14:03:03,290 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 14:03:03,290 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 29, 32] total 83 [2022-11-21 14:03:03,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750048493] [2022-11-21 14:03:03,290 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 14:03:03,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2022-11-21 14:03:03,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 14:03:03,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2022-11-21 14:03:03,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=6023, Unknown=66, NotChecked=322, Total=6972 [2022-11-21 14:03:03,304 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 166 out of 321 [2022-11-21 14:03:03,312 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 413 places, 376 transitions, 1787 flow. Second operand has 84 states, 84 states have (on average 170.0) internal successors, (14280), 84 states have internal predecessors, (14280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 14:03:03,312 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 14:03:03,312 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 166 of 321 [2022-11-21 14:03:03,312 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 14:03:34,807 INFO L130 PetriNetUnfolder]: 10755/46588 cut-off events. [2022-11-21 14:03:34,807 INFO L131 PetriNetUnfolder]: For 33213/33216 co-relation queries the response was YES. [2022-11-21 14:03:35,199 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85342 conditions, 46588 events. 10755/46588 cut-off events. For 33213/33216 co-relation queries the response was YES. Maximal size of possible extension queue 976. Compared 644722 event pairs, 2144 based on Foata normal form. 2/39693 useless extension candidates. Maximal degree in co-relation 84902. Up to 5016 conditions per place. [2022-11-21 14:03:35,331 INFO L137 encePairwiseOnDemand]: 269/321 looper letters, 297 selfloop transitions, 152 changer transitions 0/616 dead transitions. [2022-11-21 14:03:35,331 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 501 places, 616 transitions, 3652 flow [2022-11-21 14:03:35,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2022-11-21 14:03:35,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2022-11-21 14:03:35,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 15169 transitions. [2022-11-21 14:03:35,528 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5309601316111869 [2022-11-21 14:03:35,529 INFO L72 ComplementDD]: Start complementDD. Operand 89 states and 15169 transitions. [2022-11-21 14:03:35,529 INFO L73 IsDeterministic]: Start isDeterministic. Operand 89 states and 15169 transitions. [2022-11-21 14:03:35,536 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 14:03:35,537 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 89 states and 15169 transitions. [2022-11-21 14:03:35,566 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 90 states, 89 states have (on average 170.43820224719101) internal successors, (15169), 89 states have internal predecessors, (15169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 14:03:35,597 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 90 states, 90 states have (on average 321.0) internal successors, (28890), 90 states have internal predecessors, (28890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 14:03:35,603 INFO L81 ComplementDD]: Finished complementDD. Result has 90 states, 90 states have (on average 321.0) internal successors, (28890), 90 states have internal predecessors, (28890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 14:03:35,603 INFO L175 Difference]: Start difference. First operand has 413 places, 376 transitions, 1787 flow. Second operand 89 states and 15169 transitions. [2022-11-21 14:03:35,603 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 501 places, 616 transitions, 3652 flow [2022-11-21 14:03:35,789 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 499 places, 616 transitions, 3643 flow, removed 1 selfloop flow, removed 2 redundant places. [2022-11-21 14:03:35,796 INFO L231 Difference]: Finished difference. Result has 513 places, 435 transitions, 2562 flow [2022-11-21 14:03:35,796 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=321, PETRI_DIFFERENCE_MINUEND_FLOW=1778, PETRI_DIFFERENCE_MINUEND_PLACES=411, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=376, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=270, PETRI_DIFFERENCE_SUBTRAHEND_STATES=89, PETRI_FLOW=2562, PETRI_PLACES=513, PETRI_TRANSITIONS=435} [2022-11-21 14:03:35,797 INFO L288 CegarLoopForPetriNet]: 269 programPoint places, 244 predicate places. [2022-11-21 14:03:35,797 INFO L495 AbstractCegarLoop]: Abstraction has has 513 places, 435 transitions, 2562 flow [2022-11-21 14:03:35,798 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 170.0) internal successors, (14280), 84 states have internal predecessors, (14280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 14:03:35,799 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 14:03:35,799 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:03:35,805 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_489dc93a-ade0-402b-95de-4a8ffbc67c5e/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-21 14:03:35,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_489dc93a-ade0-402b-95de-4a8ffbc67c5e/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-21 14:03:35,999 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 35 more)] === [2022-11-21 14:03:36,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 14:03:36,000 INFO L85 PathProgramCache]: Analyzing trace with hash 299526818, now seen corresponding path program 1 times [2022-11-21 14:03:36,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 14:03:36,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254969148] [2022-11-21 14:03:36,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 14:03:36,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 14:03:36,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 14:03:40,757 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 151 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-11-21 14:03:40,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 14:03:40,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254969148] [2022-11-21 14:03:40,758 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254969148] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 14:03:40,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1826664785] [2022-11-21 14:03:40,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 14:03:40,758 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 14:03:40,758 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_489dc93a-ade0-402b-95de-4a8ffbc67c5e/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 14:03:40,765 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_489dc93a-ade0-402b-95de-4a8ffbc67c5e/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 14:03:40,770 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_489dc93a-ade0-402b-95de-4a8ffbc67c5e/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-21 14:03:40,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 14:03:40,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 411 conjuncts, 63 conjunts are in the unsatisfiable core [2022-11-21 14:03:40,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 14:03:40,953 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-21 14:03:41,139 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-21 14:03:41,139 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-11-21 14:03:41,524 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-21 14:03:42,026 INFO L321 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2022-11-21 14:03:42,028 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-11-21 14:03:42,422 INFO L321 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2022-11-21 14:03:42,423 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-11-21 14:03:42,814 INFO L321 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2022-11-21 14:03:42,815 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-11-21 14:03:43,221 INFO L321 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2022-11-21 14:03:43,221 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-11-21 14:03:44,069 INFO L321 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2022-11-21 14:03:44,070 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2022-11-21 14:03:44,371 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-21 14:03:44,529 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-21 14:03:44,688 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-21 14:03:44,864 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-21 14:03:45,043 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-21 14:03:45,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 14:03:45,355 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-21 14:03:45,490 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-21 14:03:45,721 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2022-11-21 14:03:45,855 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 48 proven. 76 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-11-21 14:03:45,856 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 14:03:46,305 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_855 (Array Int Int))) (< 0 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_855) c_~o_0~0.base) c_~o_0~0.offset) 4294967296))) is different from false